1
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Besisa NHA, Yoon KS, Yamauchi M. In situ electrochemical regeneration of active 1,4-NADH for enzymatic lactic acid formation via concerted functions on Pt-modified TiO 2/Ti. Chem Sci 2024; 15:3240-3248. [PMID: 38425536 PMCID: PMC10901512 DOI: 10.1039/d3sc04104b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 12/13/2023] [Indexed: 03/02/2024] Open
Abstract
Nicotinamide adenine dinucleotide (NAD+) and its reduced form (NADH) are key cofactors serving as essential hydrogen acceptors and donors to facilitate energy and material conversions under mild conditions. We demonstrate direct electrochemical conversion to achieve highly efficient regeneration of enzymatically active 1,4-NADH using a Pt-modified TiO2 catalyst grown directly on a Ti mesh electrode (Pt-TOT). Spectral analyses revealed that defects formed by the inclusion of Pt species in the lattice of TiO2 play a critical role in the regeneration process. In particular, Pt-TOT containing approximately 3 atom% of Pt exhibited unprecedented efficiency in the electrochemical reduction of NAD+ at the lowest overpotential to date. This exceptional performance led to the production of active 1,4-NADH with a significantly high yield of 86 ± 3% at -0.6 V vs. Ag/AgCl (-0.06 V vs. RHE) and an even higher yield of 99.5 ± 0.4% at a slightly elevated negative potential of -0.8 V vs. Ag/AgCl (-0.2 V vs. RHE). Furthermore, the electrochemically generated NADH was directly applied in the enzymatic conversion of pyruvic acid to lactic acid using lactate dehydrogenase.
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Affiliation(s)
- Nada H A Besisa
- Department of Chemistry, Graduate School of Science, Kyushu University Fukuoka 819-0395 Japan
| | - Ki-Seok Yoon
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University Fukuoka 819-0395 Japan
| | - M Yamauchi
- Department of Chemistry, Graduate School of Science, Kyushu University Fukuoka 819-0395 Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University Fukuoka 819-0395 Japan
- Institute for Materials Chemistry and Engineering (IMCE), Kyushu University Fukuoka 819-0395 Japan
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University Sendai 980-8577 Miyagi Japan
- Research Center for Negative Emissions Technologies (K-Nets), Kyushu University Fukuoka 819-0395 Japan
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2
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Sun M, Cheng J, Yamauchi M. Gas diffusion enhanced electrode with ultrathin superhydrophobic macropore structure for acidic CO 2 electroreduction. Nat Commun 2024; 15:491. [PMID: 38225248 PMCID: PMC10789815 DOI: 10.1038/s41467-024-44722-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Accepted: 01/02/2024] [Indexed: 01/17/2024] Open
Abstract
Carbon dioxide (CO2) electroreduction reaction (CO2RR) offers a promising strategy for the conversion of CO2 into valuable chemicals and fuels. CO2RR in acidic electrolytes would have various advantages due to the suppression of carbonate formation. However, its reaction rate is severely limited by the slow CO2 diffusion due to the absence of hydroxide that facilitates the CO2 diffusion in an acidic environment. Here, we design an optimal architecture of a gas diffusion electrode (GDE) employing a copper-based ultrathin superhydrophobic macroporous layer, in which the CO2 diffusion is highly enhanced. This GDE retains its applicability even under mechanical deformation conditions. The CO2RR in acidic electrolytes exhibits a Faradaic efficiency of 87% with a partial current density [Formula: see text] of -1.6 A cm-2 for multicarbon products (C2+), and [Formula: see text] of -0.34 A cm-2 when applying dilute 25% CO2. In a highly acidic environment, C2+ formation occurs via a second order reaction which is controlled by both the catalyst and its hydroxide.
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Affiliation(s)
- Mingxu Sun
- Department of Chemistry, Graduate School of Science, Kyushu University, Nishi-ku, Fukuoka, Japan
| | - Jiamin Cheng
- Research Center for Negative Emissions Technologies (K-NETs), Kyushu University, Nishi-ku, Fukuoka, Japan
| | - Miho Yamauchi
- Department of Chemistry, Graduate School of Science, Kyushu University, Nishi-ku, Fukuoka, Japan.
- Research Center for Negative Emissions Technologies (K-NETs), Kyushu University, Nishi-ku, Fukuoka, Japan.
- Institute for Materials Chemistry and Engineering (IMCE), Kyushu University, Nishi-ku, Fukuoka, Japan.
- International Institute for Carbon-Neutral Energy Research (WPI-I²CNER), Kyushu University, Nishi-ku, Fukuoka, Japan.
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Aoba-ku, Sendai, Japan.
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3
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Anzai A, Higashi M, Yamauchi M. Direct electrochemical CO 2 conversion using oxygen-mixed gas on a Cu network cathode and tailored anode. Chem Commun (Camb) 2023; 59:11188-11191. [PMID: 37622265 DOI: 10.1039/d3cc03298a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/26/2023]
Abstract
Electrochemical CO2 reduction (eCO2R) by direct introduction of 60% air-containing CO2 mixed gas was demonstrated using a porous Cu network cathode formed on a hydrophobic gas diffusion layer (Cu/P-GDL). Cu/P-GDL exhibited eCO2R using the mixed gas with a remarkable faradaic efficiency of 85% for the production of C2+ chemicals, whereas a Cu cathode constructed on a conventional carbon gas diffusion layer (Cu/C-GDL) produced neither eCO2R products nor H2. Furthermore, the electrolyzer with Cu/P-GDL and optimized anode configuration achieved a partial current density of 132 mA cm-2 for C2+ chemicals even in the presence of 12% O2. Demonstration of eCO2R with impure CO2 gas would greatly expand its future applications.
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Affiliation(s)
- Akihiko Anzai
- Institute for Materials Chemistry and Engineering (IMCE), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan.
| | - Manabu Higashi
- Institute for Materials Chemistry and Engineering (IMCE), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan.
| | - Miho Yamauchi
- Institute for Materials Chemistry and Engineering (IMCE), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan.
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
- Research Center for Negative Emissions Technologies (K-NETs), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
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4
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Sun M, Staykov A, Yamauchi M. Understanding the Roles of Hydroxide in CO 2 Electroreduction on a Cu Electrode for Achieving Variable Selectivity. ACS Catal 2022. [DOI: 10.1021/acscatal.2c03650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Mingxu Sun
- Department of Chemistry, Graduate School of Science, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
| | - Aleksandar Staykov
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
- Research Center for Negative Emissions Technologies (K-Nets), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
| | - Miho Yamauchi
- Department of Chemistry, Graduate School of Science, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
- Research Center for Negative Emissions Technologies (K-Nets), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
- Institute for Materials Chemistry and Engineering (IMCE), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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5
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Saito S, Yamashiro T, Yamauchi M, Yamamoto Y, Noguchi M, Tomita T, Kawakami D, Shikata M, Tanaka T, Ihara M. Complement 3 Is a Potential Biomarker for Cerebral Amyloid Angiopathy. J Alzheimers Dis 2022; 89:381-387. [DOI: 10.3233/jad-220494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Background: Cerebral amyloid angiopathy is a cerebrovascular disease directly implicated in Alzheimer’s disease pathogenesis through amyloid-β deposition. Growing evidence has shown a pivotal role of chronic neuroinflammation both in cerebral amyloid angiopathy and Alzheimer’s disease. Objective: The aim of this study was to investigate whether circulating levels of the complement 3, a crucial component of the innate immune system, are increased in patients with cerebral amyloid angiopathy. Methods: Serum complement 3 levels were retrospectively measured by a sandwich enzyme-linked immunosorbent assay in a single-center cohort of patients with mild cognitive impairment. The diagnosis of cerebral amyloid angiopathy was based on the modified Boston criteria. Logistic regression analysis was performed to identify the predictive factors for cerebral amyloid angiopathy. Results: We analyzed 55 mild cognitive impairment patients (mean age [standard deviation]: 76.3 [6.8] years; 33 [60% ] men). Complement 3 levels were significantly increased in cerebral amyloid angiopathy patients (n = 16) compared with those without cerebral amyloid angiopathy (n = 39) (median [interquartile range]: 0.43 [0.34–0.65] versus 0.35 [0.25–0.45], respectively; p = 0.040). Univariate and multivariate logistic regression analysis revealed that increased complement 3 levels were significantly associated with cerebral amyloid angiopathy. After selection of the best predictive model using stepwise selection, complement 3 was preserved as a significant independent predictive factor for cerebral amyloid angiopathy (odds ratio per 0.1 unit/mL increase [95% confidence interval]: 1.407 [1.042–1.899]; p = 0.026). Conclusion: Complement activation may play a pivotal role in cerebral amyloid angiopathy. Complement 3 may be a novel diagnostic biomarker for cerebral amyloid angiopathy.
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Affiliation(s)
- Satoshi Saito
- Department of Neurology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Takayuki Yamashiro
- Department of Neurology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Miho Yamauchi
- Department of Neurology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Yumi Yamamoto
- Department of Molecular Innovation in Epidemiology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Michio Noguchi
- National Cerebral and Cardiovascular Center Biobank, Suita, Japan
| | - Tsutomu Tomita
- National Cerebral and Cardiovascular Center Biobank, Suita, Japan
| | - Daisuke Kawakami
- Analytical & Measuring Instruments Division, Shimadzu Corporation, Nakagyo-ku, Kyoto, Japan
| | - Masamitsu Shikata
- Analytical & Measuring Instruments Division, Shimadzu Corporation, Nakagyo-ku, Kyoto, Japan
| | - Tomotaka Tanaka
- Department of Neurology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Masafumi Ihara
- Department of Neurology, National Cerebral and Cardiovascular Center, Suita, Japan
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6
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Aso K, Kobayashi H, Yoshimaru S, Tran XQ, Yamauchi M, Matsumura S, Oshima Y. Singular behaviour of atomic ordering in Pt-Co nanocubes starting from core-shell configurations. Nanoscale 2022; 14:9842-9848. [PMID: 35771202 DOI: 10.1039/d2nr01982e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The ordered structure of platinum-cobalt (Pt-Co) alloy nanoparticles has been studied actively because the structure influences their magnetic and catalytic properties. On the Pt-Co alloy's surface, Pt atoms preferentially segregate during annealing to reduce the surface energy. Such surface segregation has been shown to promote the formation of an ordered structure near the surface of Pt-Co thin films. Although this phenomenon seems also useful to control the nanoparticle structure, this has not been observed. Here, we have studied the ordered structure in annealed Pt@Co core-shell nanoparticles using a scanning transmission electron microscope. The nanoparticles were chemically synthesized, and their structural changes after annealing at 600 °C, 700 °C, and 800 °C for 3 h were observed. After being annealed at 600 °C and 800 °C, the particles contained the L12-Pt3Co ordered structure. The structure seems reasonable considering an initial Pt : Co ratio of ∼4 : 1. However, we found that the L10-PtCo structure was formed near the nanoparticle surface after annealing at 700 °C. The L10-PtCo structure was thought to be formed from the surface segregation of Pt atoms and insufficient diffusion of Pt and Co atoms to mix them in the particle overall.
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Affiliation(s)
- Kohei Aso
- School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan.
| | - Hirokazu Kobayashi
- Research Center for Negative Emissions Technologies, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Shotaro Yoshimaru
- Department of Chemistry, Faculty of Science, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Xuan Quy Tran
- Department of Applied Quantum Physics and Nuclear Engineering, Graduate School of Engineering, Kyushu University, Moto-oka 744, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Miho Yamauchi
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Syo Matsumura
- Department of Applied Quantum Physics and Nuclear Engineering, Graduate School of Engineering, Kyushu University, Moto-oka 744, Nishi-ku, Fukuoka, 819-0395, Japan
- The Ultramicroscopy Research Center, Kyushu University, Moto-oka 744, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Yoshifumi Oshima
- School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan.
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7
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Yamauchi M, Ono A, Amioka K, Fujii Y, Uchikawa S, Fujino H, Nakahara T, Murakami E, Okamoto W, Kawaoka T, Miki D, Tsuge M, Imamura M, Nelson H, Kato Y, Kimura M, Suzuki N, Aikata H, Chayama K. P-141 Lenvatinib activates potential anti-tumor immunity by increasing infiltration of immune cells and interferon response in tumor microenvironment of advanced hepatocellular carcinoma. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.04.231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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8
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Kitano S, Noguchi TG, Nishihara M, Kamitani K, Sugiyama T, Yoshioka S, Miwa T, Yoshizawa K, Staykov A, Yamauchi M. Heterointerface Created on Au-Cluster-Loaded Unilamellar Hydroxide Electrocatalysts as a Highly Active Site for the Oxygen Evolution Reaction. Adv Mater 2022; 34:e2110552. [PMID: 35212064 DOI: 10.1002/adma.202110552] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Revised: 01/29/2022] [Indexed: 06/14/2023]
Abstract
The oxygen evolution reaction (OER) is a critical element for all sorts of reactions that use water as a hydrogen source, such as hydrogen evolution and electrochemical CO2 reduction, and novel design principles that provide highly active sites on OER electrocatalysts push the limits of their practical applications. Herein, Au-cluster loading on unilamellar exfoliated layered double hydroxide (ULDH) electrocatalysts for the OER is demonstrated to fabricate a heterointerface between Au clusters and ULDHs as an active site, which is accompanied by the oxidation state modulation of the active site and interfacial direct OO coupling ("interfacial DOOC"). The Au-cluster-loaded ULDHs exhibit excellent activities for the OER with an overpotential of 189 mV at 10 mA cm-2 . X-ray absorption fine structure measurements reveal that charge transfer from the Au clusters to ULDHs modifies the oxidation states of trivalent metal ions, which can be active sites on the ULDHs. The present study, supported by highly sensitive spectroscopy combining reflection absorption infrared spectroscopy and modulation-excitation spectroscopy and density functional theory calculations, indicates that active sites at the interface between the Au clusters and ULDHs promote a novel OER mechanism through interfacial DOOC, thereby achieving outstanding catalytic performance.
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Affiliation(s)
- Sho Kitano
- Division of Applied Chemistry, Faculty of Engineering, Hokkaido University, Kita 13, Nishi 8, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I 2CNER), Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Tomohiro G Noguchi
- International Institute for Carbon-Neutral Energy Research (WPI-I 2CNER), Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Masamichi Nishihara
- Next-Generation Fuel Cell Research Center, Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Kazutaka Kamitani
- Research Center for Synchrotron Light Applications, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka, 816-8580, Japan
| | - Takeharu Sugiyama
- Research Center for Synchrotron Light Applications, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka, 816-8580, Japan
| | - Satoru Yoshioka
- Department of Applied Quantum Physics and Nuclear Engineering, Faculty of Engineering, Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Tetsuya Miwa
- Institute for Materials Chemistry and Engineering (IMCE), Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering (IMCE), Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
- Integrated Research Consortium on Chemical Science (IRCCS), Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Aleksandar Staykov
- International Institute for Carbon-Neutral Energy Research (WPI-I 2CNER), Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
- Research Center for Negative Emissions Technologies (K-Nets), Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Miho Yamauchi
- International Institute for Carbon-Neutral Energy Research (WPI-I 2CNER), Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
- Institute for Materials Chemistry and Engineering (IMCE), Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
- Research Center for Negative Emissions Technologies (K-Nets), Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
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9
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Matsumoto K, Sato R, Tatetsu Y, Takahata R, Yamazoe S, Yamauchi M, Inagaki Y, Horibe Y, Kudo M, Toriyama T, Auchi M, Haruta M, Kurata H, Teranishi T. Inter-element miscibility driven stabilization of ordered pseudo-binary alloy. Nat Commun 2022; 13:1047. [PMID: 35210441 PMCID: PMC8873263 DOI: 10.1038/s41467-022-28710-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 01/28/2022] [Indexed: 11/09/2022] Open
Abstract
An infinite number of crystal structures in a multicomponent alloy with a specific atomic ratio can be devised, although only thermodynamically-stable phases can be formed. Here, we experimentally show the first example of a layer-structured pseudo-binary alloy, theoretically called Z3-FePd3. This Z3 structure is achieved by adding a small amount of In, which is immiscible with Fe but miscible with Pd and consists of an alternate L10 (CuAu-type)-PdFePd trilayer and Pd–In ordered alloy monolayer along the c axis. First-principles calculations strongly support that the specific inter-element miscibility of In atoms stabilizes the thermodynamically-unstable Z3-FePd3 phase without significantly changing the original density of states of the Z3-FePd3 phase. Our results demonstrate that the specific inter-element miscibility can switch stable structures and manipulate the material nature with a slight composition change. Synthetic routes of stabilizing crystal structures can discover atomic pickings with desired properties. Here the authors demonstrate inter-element miscibility of In can act as a stabilizer to create Z3-based ordered alloy without significantly changing the original density of state of Z3-FePd3.
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Affiliation(s)
- Kenshi Matsumoto
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan
| | - Ryota Sato
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan
| | - Yasutomi Tatetsu
- Center for Liberal Arts Education, Meio University, Biimata, Nago, Okinawa, 905-8585, Japan
| | - Ryo Takahata
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan
| | - Seiji Yamazoe
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 192-0397, Japan
| | - Miho Yamauchi
- Institute for Materials Chemistry and Engineering (IMCE), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Yuji Inagaki
- Department of Applied Quantum Physics and Nuclear Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Yoichi Horibe
- Department of Materials Science and Engineering, Graduate School of Engineering, Kyushu Institute of Technology, 1-1 Sensui, Tobata, Kitakyuushu, Fukuoka, 804-8550, Japan
| | - Masaki Kudo
- The Ultramicroscopy Research Center, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Takaaki Toriyama
- The Ultramicroscopy Research Center, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Mitsunari Auchi
- The Ultramicroscopy Research Center, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Mitsutaka Haruta
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan
| | - Hiroki Kurata
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan
| | - Toshiharu Teranishi
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan.
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10
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Chapman A, Ertekin E, Kubota M, Nagao A, Bertsch K, Macadre A, Tsuchiyama T, Masamura T, Takaki S, Komoda R, Dadfarnia M, Somerday B, Staykov AT, Sugimura J, Sawae Y, Morita T, Tanaka H, Yagi K, Niste V, Saravanan P, Onitsuka S, Yoon KS, Ogo S, Matsushima T, Tumen-Ulzii G, Klotz D, Nguyen DH, Harrington G, Adachi C, Matsumoto H, Kwati L, Takahashi Y, Kosem N, Ishihara T, Yamauchi M, Saha BB, Islam MA, Miyawaki J, Sivasankaran H, Kohno M, Fujikawa S, Selyanchyn R, Tsuji T, Higashi Y, Kirchheim R, Sofronis P. Achieving a Carbon Neutral Future through Advanced Functional Materials and Technologies. BCSJ 2022. [DOI: 10.1246/bcsj.20210323] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Andrew Chapman
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Elif Ertekin
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Illinois, USA
| | - Masanobu Kubota
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Akihide Nagao
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Kaila Bertsch
- Lawrence Livermore National Laboratory, California, USA
| | - Arnaud Macadre
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
- Department of Mechanical Engineering, Yamaguchi University, Yamaguchi, Japan
| | - Toshihiro Tsuchiyama
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
- Department of Materials Science and Engineering, Kyushu University, Fukuoka, Japan
| | - Takuro Masamura
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
- Department of Materials Science and Engineering, Kyushu University, Fukuoka, Japan
| | - Setsuo Takaki
- Netsuren Co., Ltd., Hyogo, Japan
- Emeritus Professor, Kyushu University, Fukuoka, Japan
| | - Ryosuke Komoda
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
- Department of Mechanical Engineering, Fukuoka University, Fukuoka, Japan
| | - Mohsen Dadfarnia
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
- Department of Mechanical Engineering, Seattle University, Washington, USA
| | - Brian Somerday
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Illinois, USA
- Somerday Consulting LLC, Pennsylvania, USA
| | - Alexander Tsekov Staykov
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Joichi Sugimura
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
- Research Center for Hydrogen Industrial Use and Storage, Kyushu University, Fukuoka, Japan
- Department of Mechanical Engineering, Fukuoka University, Fukuoka, Japan
| | - Yoshinori Sawae
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
- Department of Mechanical Engineering, Fukuoka University, Fukuoka, Japan
| | - Takehiro Morita
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
- Department of Mechanical Engineering, Fukuoka University, Fukuoka, Japan
| | - Hiroyoshi Tanaka
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
- Research Center for Hydrogen Industrial Use and Storage, Kyushu University, Fukuoka, Japan
- Department of Mechanical Engineering, Fukuoka University, Fukuoka, Japan
| | - Kazuyuki Yagi
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
- Research Center for Hydrogen Industrial Use and Storage, Kyushu University, Fukuoka, Japan
- Department of Mechanical Engineering, Fukuoka University, Fukuoka, Japan
| | | | - Prabakaran Saravanan
- Department of Mechanical Engineering, Birla Institute of Technology & Science - Pilani, Hyderabad, Telangana, India
| | - Shugo Onitsuka
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Ki-Seok Yoon
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Seiji Ogo
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Toshinori Matsushima
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Ganbaatar Tumen-Ulzii
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Dino Klotz
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Dinh Hoa Nguyen
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - George Harrington
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Chihaya Adachi
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Hiroshige Matsumoto
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Leonard Kwati
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Yukina Takahashi
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Nuttavut Kosem
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Tatsumi Ishihara
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Miho Yamauchi
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Bidyut Baran Saha
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Md. Amirul Islam
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Jin Miyawaki
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Harish Sivasankaran
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Masamichi Kohno
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Shigenori Fujikawa
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Roman Selyanchyn
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Takeshi Tsuji
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Yukihiro Higashi
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
| | - Reiner Kirchheim
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
- Institute of Materials Physics, University of Gottingen, Germany
| | - Petros Sofronis
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Fukuoka, Japan
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Illinois, USA
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11
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Rivera Rocabado DS, Noguchi TG, Hayashi S, Maeda N, Yamauchi M, Ishimoto T. Adsorption States of N 2/H 2 Activated on Ru Nanoparticles Uncovered by Modulation-Excitation Infrared Spectroscopy and Density Functional Theory Calculations. ACS Nano 2021; 15:20079-20086. [PMID: 34860010 DOI: 10.1021/acsnano.1c07825] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The adsorption states of N2 and H2 on MgO-supported Ru nanoparticles under conditions close to those of ammonia synthesis (AS; 1 atm, 250 °C) were uncovered by modulation-excitation infrared spectroscopy and density functional theory calculations using a nanoscale Ru particle model. The two most intense N2 adsorption peaks corresponded to the vertical chemisorption of N2 on the nanoparticle's top and bridge sites, while the remaining peaks were assigned to horizontally adsorbed N2 in view of the site heterogeneity of Ru nanoparticles. Long-term observations showed that vertically adsorbed N2 molecules gradually migrated from the top sites to the bridge sites. Compared to those adsorbed vertically, N2 molecules adsorbed horizontally exhibited a lower dipole moment, an increased N─N bond distance, and a decreased N─N bond order (i.e., were activated), which was ascribed to enhanced Ru-to-N charge transfer. H2 molecules were preferentially adsorbed horizontally on top sites and then rapidly dissociated to afford strongly surface-bound H atoms and thus block the active sites of Ru nanoparticles. Our results clarify the controversial adsorption/desorption behavior of N2 and H2 on AS catalysts and facilitate their further development.
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Affiliation(s)
- David S Rivera Rocabado
- Graduate School of Nanobioscience, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Japan
- Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima 739-8527, Japan
| | - Tomohiro G Noguchi
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
| | - Shio Hayashi
- International College of Arts and Sciences, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Nobutaka Maeda
- Institute of Materials and Process Engineering (IMPE), Zürcher Hochschule für Angewandte Wissenschaften (ZHAW), Technikumstrasse 9, 8401 Winterthur, Switzerland
| | - Miho Yamauchi
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Takayoshi Ishimoto
- Graduate School of Nanobioscience, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Japan
- Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima 739-8527, Japan
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12
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Affiliation(s)
- Miho Yamauchi
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan
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13
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Kato K, Shigeta K, Sato R, Yamauchi M, Teranishi T. Picometre-level core–shell structure in Pd nanocrystals revealed by total scattering. Acta Crystallogr A Found Adv 2021. [DOI: 10.1107/s0108767321093193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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14
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Eguchi H, Kobayashi T, Yamada T, Rocabado DSR, Ishimoto T, Yamauchi M. Inversely polarized thermo-electrochemical power generation via the reaction of an organic redox couple on a TiO 2/Ti mesh electrode. Sci Rep 2021; 11:13929. [PMID: 34230515 PMCID: PMC8260709 DOI: 10.1038/s41598-021-93269-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 04/29/2021] [Indexed: 11/09/2022] Open
Abstract
We demonstrate thermo-electrochemical (TEC) conversion using a biocompatible redox couple of lactic acid and pyruvic acid on earth-abundant TiO2. The TEC cell exhibited a positive Seebeck coefficient of 1.40 mV K-1. DFT calculations figured out that the adsorption of intermediate species and protons on TiO2 controls both the redox reaction and current polarity.
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Affiliation(s)
- Hiroto Eguchi
- Department of Chemistry, Graduate School of Science, Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Takashi Kobayashi
- Division of Applied Chemistry, Graduate School of Engineering, Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Teppei Yamada
- Division of Applied Chemistry, Graduate School of Engineering, Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan. .,Center for Molecular Systems, Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan.
| | - David S Rivera Rocabado
- Graduate School of Nanobioscience, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama, 236-0027, Japan
| | - Takayoshi Ishimoto
- Graduate School of Nanobioscience, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama, 236-0027, Japan. .,Smart Innovation Program, Graduate School of Advanced Science and Engineering, Hiroshima University, Kagamiyama 1-4-1, Higashi-Hiroshima, Hiroshima, 739-8527, Japan.
| | - Miho Yamauchi
- Department of Chemistry, Graduate School of Science, Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan. .,International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan. .,Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan.
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15
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Saito S, Shinmyozu K, Kawakami D, Yamauchi M, Ikeda S, Hattori Y, Yamamoto R, Hayakawa N, Ihara M. Conversion from cilostazol to OPC-13015 linked to mitigation of cognitive impairment. Alzheimers Dement (N Y) 2021; 7:e12182. [PMID: 34095441 PMCID: PMC8158162 DOI: 10.1002/trc2.12182] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 03/03/2021] [Accepted: 04/20/2021] [Indexed: 01/30/2023]
Abstract
INTRODUCTION Cilostazol may be a novel therapeutic agent for Alzheimer's disease. Its metabolite, OPC-13015, has a stronger inhibitory effect on type 3 phosphodiesterase than cilostazol. METHODS We prospectively enrolled patients with mild cognitive impairment to whom cilostazol was newly prescribed. Patients underwent the Montreal Cognitive Assessment (MoCA) twice, at a 6-month interval. Plasma cilostazol, OPC-13015, OPC-13213, and OPC-13217 concentrations were determined using liquid chromatography-tandem mass spectrometry. RESULTS MoCA score changes from baseline to the 6-month visit were positively correlated with ratios of OPC-13015 to cilostazol and total metabolites (n = 19, P = .005). Patients with higher ratios of OPC-13015 (≥0.18, median value; n = 10) had significantly higher MoCA scores (P = .036) than patients with lower ratios (the ratio <0.18, n = 9). The absolute value of OPC-13015 concentration in blood was also higher in patients with preserved cognitive function (P = .033). DISCUSSION Blood OPC-13015 levels may be a predictive biomarker of cilostazol treatment for Alzheimer's disease.
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Affiliation(s)
- Satoshi Saito
- Department of NeurologyNational Cerebral and Cardiovascular CenterSuitaOsakaJapan
- Department of Pediatric DentistryOsaka University Graduate School of DentistrySuitaOsakaJapan
| | - Kaori Shinmyozu
- Department of PharmacyNational Cerebral and Cardiovascular CenterSuitaOsakaJapan
| | - Daisuke Kawakami
- Division of Analytical & Measuring InstrumentsShimadzu CorporationNakagyo‐kuKyotoJapan
| | - Miho Yamauchi
- Department of NeurologyNational Cerebral and Cardiovascular CenterSuitaOsakaJapan
| | - Shuhei Ikeda
- Department of NeurologyNational Cerebral and Cardiovascular CenterSuitaOsakaJapan
| | - Yorito Hattori
- Department of NeurologyNational Cerebral and Cardiovascular CenterSuitaOsakaJapan
| | - Rintaro Yamamoto
- Division of Analytical & Measuring InstrumentsShimadzu CorporationNakagyo‐kuKyotoJapan
| | - Naoki Hayakawa
- Department of PharmacyNational Cerebral and Cardiovascular CenterSuitaOsakaJapan
| | - Masafumi Ihara
- Department of NeurologyNational Cerebral and Cardiovascular CenterSuitaOsakaJapan
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16
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Yoshimaru S, Sadakiyo M, Maeda N, Yamauchi M, Kato K, Pirillo J, Hijikata Y. Support Effect of Metal-Organic Frameworks on Ethanol Production through Acetic Acid Hydrogenation. ACS Appl Mater Interfaces 2021; 13:19992-20001. [PMID: 33877813 PMCID: PMC8288914 DOI: 10.1021/acsami.1c01100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Accepted: 04/07/2021] [Indexed: 06/12/2023]
Abstract
We present a systematic study on the support effect of metal-organic frameworks (MOFs), regarding substrate adsorption. A remarkable enhancement of both catalytic activity and selectivity for the ethanol (EtOH) production reaction through acetic acid (AcOH) hydrogenation (AH) was observed on Pt nanoparticles supported on MOFs. The systematic study on catalysis using homogeneously loaded Pt catalysts, in direct contact with seven different MOF supports (MIL-125-NH2, UiO-66-NH2, HKUST-1, MIL-101, Zn-MOF-74, Mg-MOF-74, and MIL-121) (abbreviated as Pt/MOFs), found that MOFs having a high affinity for the AcOH substrate (UiO-66-NH2 and MIL-125-NH2) showed high catalytic activity for AH. This is the first demonstration indicating that the adsorption ability of MOFs directly accelerates catalytic performance using the direct contact between the metal and the MOF. In addition, Pt/MIL-125-NH2 showed a remarkably high EtOH yield (31% at 200 °C) in a fixed-bed flow reactor, which was higher by a factor of more than 8 over that observed for Pt/TiO2, which was the best Pt-based catalyst for this reaction. Infrared spectroscopy and a theoretical study suggested that the MIL-125-NH2 support plays an important role in high EtOH selectivity by suppressing the formation of the byproduct, ethyl acetate (AcOEt), due to its relatively weak adsorption behavior for EtOH rather than AcOH.
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Affiliation(s)
- Shotaro Yoshimaru
- Department
of Chemistry, Faculty of Science, Kyushu
University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Masaaki Sadakiyo
- Department
of Chemistry, Faculty of Science, Kyushu
University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
- Department
of Applied Chemistry, Faculty of Science Division I, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
- International
Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Nobutaka Maeda
- International
Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Miho Yamauchi
- Department
of Chemistry, Faculty of Science, Kyushu
University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
- International
Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Kenichi Kato
- RIKEN
SPring-8 Center,1-1-1
Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - Jenny Pirillo
- Institute
for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Kita 21 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Yuh Hijikata
- Institute
for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Kita 21 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
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17
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Kitano S, Ooi ML, Yamamoto T, Matsumura S, Yamauchi M. Catalytic Roles and Synergetic Effects of Iron-Group Elements on Monometals and Alloys for Electrochemical Oxidation of Ammonia. BCSJ 2021. [DOI: 10.1246/bcsj.20210007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Sho Kitano
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Mei Lee Ooi
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Tomokazu Yamamoto
- Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Syo Matsumura
- Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Miho Yamauchi
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Advanced Institute for Materials Research (AIMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan
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18
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Eguchi H, Kato K, Juhasz G, Yamauchi M. Selectivity enhancement in the electrochemical reduction of oxalic acid over titanium dioxide nanoparticles achieved by shape and energy-state control. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01239h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The morphology of TiO2 nanoparticles has a substantial impact on the product selectivity in an electrochemical reduction reaction.
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Affiliation(s)
- Hiroto Eguchi
- Department of Chemistry, Graduate School of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, Japan
| | - Kenichi Kato
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, Japan
| | - Gergely Juhasz
- Department of Chemistry, Graduate School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, Japan
| | - Miho Yamauchi
- Department of Chemistry, Graduate School of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, Japan
- Advanced Institute for Materials Research (AIMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
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Kobayashi N, Toyama H, Kubo R, Matsuda Y, Okada Y, Ejima Y, Yamauchi M. Bicarbonate in Arteries Measured Preoperatively for Cadaveric Single-lung Transplantation is Related to Intraoperative Extra-Corporeal Membrane Oxygenation Use: A Retrospective Preliminary Study. Int J Organ Transplant Med 2021; 12:37-42. [PMID: 36570358 PMCID: PMC9758997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Background There are no known predictors of extracorporeal membrane oxygenation (ECMO) induction for single lung transplantation. Objective The purpose of the present study was to clarify the relationship between variables and ECMO requirements in single lung transplantation. Methods This study included adult patients who underwent cadaveric single lung transplantation between 2010 and 2019. After general anesthesia, the transplanted lungs were ventilated in all cases. The analysis included 38 patients in the ECMO required (RQ) group and 12 patients in the ECMO non-required (FR) group. Comparisons were made between the two groups for data affecting ECMO implementation, and data that were significantly different were subjected to multivariate analysis. Results Prior to anesthesia, the bicarbonate (HCO3-) value of the FR group was lower than that of the RQ group (24.6±2.7 vs. 29.7±5.3 mmol/L, p=0.005). Multivariate analysis showed that the cut-off bicarbonate value was 29.6. The area under the receiver operating characteristic curve (AUROC) of the model was 0.869 (R2: 0.331), with a sensitivity of 79% and a specificity of 88%. The odds ratio was 1.63 for every unit increase in the bicarbonate value (95%CI: 1.11-2.39, p<0.001). Further, the FR group had higher arterial blood pressure (mean: 79.0±11.5 vs. 68.9±8.3 mmHg, p=0.030), less blood loss (432±385 vs. 1,623±1,997 g, p<0.001), shorter operation time (417±44 vs. 543±111 min, p<0.001), and shorter ICU stay (11±9 vs. 25±38 days, p=0.039). Conclusion Preoperative evaluation of bicarbonate could predict the need for ECMO for single lung transplantation.
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Affiliation(s)
- N. Kobayashi
- Department of Anesthesiology and Perioperative Medicine, School of Medicine, Tohoku University, Japan,Correspondence: Naoya Kobayashi, MD, PhD, Department of Anesthesiology, Tohoku University Hospital 1-1 Seiryomachi, Aoba, Sendai, Japan, 980-857
| | - H. Toyama
- Department of Anesthesiology and Perioperative Medicine, School of Medicine, Tohoku University, Japan
| | - R. Kubo
- Department of Anesthesiology and Perioperative Medicine, School of Medicine, Tohoku University, Japan
| | - Y. Matsuda
- Department of Thoracic Surgery, Institute of Development, Aging and Cancer, Tohoku University, Japan
| | - Y. Okada
- Department of Thoracic Surgery, Institute of Development, Aging and Cancer, Tohoku University, Japan
| | - Y. Ejima
- Department of Surgical Center and Supply, Tohoku University, Japan
| | - M. Yamauchi
- Department of Anesthesiology and Perioperative Medicine, School of Medicine, Tohoku University, Japan
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20
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Nomura M, Vediyappan V, Lai Q, Terayama Y, Fujisaki T, Eguchi H, Yamauchi M, Sone Y, Mendoza O, Matsuda J, Satokawa S, Matsumoto H. Ionic conductivity of protonated layered titanate nano‐powder compact in water. Nano Select 2020. [DOI: 10.1002/nano.202000031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- Munemitsu Nomura
- International Institute for Carbon‐Neutral Energy Research (WPI‐I2CNER) Kyushu University Fukuoka 819‐0395 Japan
- Graduate school of Engineering Kyushu University Fukuoka 819‐0395 Japan
| | - Veeramani Vediyappan
- International Institute for Carbon‐Neutral Energy Research (WPI‐I2CNER) Kyushu University Fukuoka 819‐0395 Japan
| | - Qiwen Lai
- International Institute for Carbon‐Neutral Energy Research (WPI‐I2CNER) Kyushu University Fukuoka 819‐0395 Japan
| | - Yuki Terayama
- International Institute for Carbon‐Neutral Energy Research (WPI‐I2CNER) Kyushu University Fukuoka 819‐0395 Japan
| | - Takaya Fujisaki
- International Institute for Carbon‐Neutral Energy Research (WPI‐I2CNER) Kyushu University Fukuoka 819‐0395 Japan
| | - Hiroto Eguchi
- International Institute for Carbon‐Neutral Energy Research (WPI‐I2CNER) Kyushu University Fukuoka 819‐0395 Japan
| | - Miho Yamauchi
- International Institute for Carbon‐Neutral Energy Research (WPI‐I2CNER) Kyushu University Fukuoka 819‐0395 Japan
| | - Yoshitsugu Sone
- Institute of Space and Astronautical Science Japan Aerospace Exploration Agency Sagamihara Kanagawa 252–5210 Japan
| | - Omar Mendoza
- Institute of Space and Astronautical Science Japan Aerospace Exploration Agency Sagamihara Kanagawa 252–5210 Japan
| | - Junko Matsuda
- International Institute for Carbon‐Neutral Energy Research (WPI‐I2CNER) Kyushu University Fukuoka 819‐0395 Japan
| | - Shigeo Satokawa
- Faculty of Science and Technology Seikei University Tokyo 180–8633 Japan
| | - Hiroshige Matsumoto
- International Institute for Carbon‐Neutral Energy Research (WPI‐I2CNER) Kyushu University Fukuoka 819‐0395 Japan
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Yamauchi-Kawaura C, Fujii K, Yamauchi M, Imai K, Ikeda M, Narai K, Shimizu H. DEVELOPMENT OF A JAPANESE INFANT HEAD-CHEST PHANTOM AND INVESTIGATION OF THE CURRENT STATUS OF INFANT HEAD CT EXAMINATIONS IN JAPAN. Radiat Prot Dosimetry 2020; 188:65-72. [PMID: 31836891 DOI: 10.1093/rpd/ncz261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 09/12/2019] [Indexed: 06/10/2023]
Abstract
The aim of this study was to develop a head-chest phantom that could mimic the physique of a Japanese 0.5-year-old child and to investigate the current status of exposure dose in infant head computed tomography examinations in Japan. The phantom was produced by machine processing, and radiophotoluminescence glass dosemeters were installed in the phantom for dose measurement. Organ doses were measured for seven different head scan protocols routinely used in three hospitals. In this study, the average dose of the brain and lens within the scan region was equivalent to that measured using infant phantoms in previous studies. In contrast, the doses of both salivary glands and thyroid glands adjacent to the scan region were 1.4-1.8 times higher than those in previous studies. Expansion of the scan area accompanied by a transition of the scan mode from non-helical to helical may have resulted in the differences in organ doses.
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Affiliation(s)
- C Yamauchi-Kawaura
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - K Fujii
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - M Yamauchi
- Division of Radiology, Aichi Medical University Hospital, Nagakute, Aichi 480-1195, Japan
| | - K Imai
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - M Ikeda
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - K Narai
- Techno-Rad, Inc., 50-8, Higashi Arami, Tai, Miyama-cho, Kuze-gun, Kyoto 613-0036, Japan
| | - H Shimizu
- Department of Radiation Oncology, Aichi Cancer Center Hospital, 1-1 Kanokoden, Chikusa-ku, Nagoya 464-8681, Japan
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22
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Abstract
Seven amino acids were electrochemically synthesized from biomass-derivable α-keto acids and NH2OH with faradaic efficiencies (FEs) of 77-99% using an earth-abundant TiO2 catalyst. Furthermore, we newly constructed a flow-type electrochemical reactor, named a "polymer electrolyte amino acid electrosynthesis cell", and achieved continuous production of alanine with an FE of 77%.
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Affiliation(s)
- Takashi Fukushima
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan.
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23
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Yamauchi-Kawaura C, Fujii K, Yamauchi M, Yamamoto S, Kozuka M, Ohzawa N, Suga N, Ito N. SHAPE ESTIMATION OF BOWTIE FILTERS BASED ON THE LUMINESCENCE FROM POLYETHYLENE TEREPHTHALATE RESIN BY X-RAY IRRADIATION. Radiat Prot Dosimetry 2019; 185:432-439. [PMID: 30916354 DOI: 10.1093/rpd/ncz031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 01/27/2019] [Accepted: 02/28/2019] [Indexed: 06/09/2023]
Abstract
In this study, we devised a novel method estimating the bowtie filter shapes by imaging luminescence from a polyethylene terephthalate (PET) resin with X-ray irradiation in a computed tomography (CT) scanner. The luminescence distribution of the PET resin corresponding to the thickness of bowtie filter was imaged using a charge-coupled device camera. On the assumption that the material of bowtie filter is aluminium (Al), the shape of bowtie filters was estimated from the correlation between Al attenuation curves and the angular-dependent luminance attenuation profiles according to the thickness of bowtie filters. Dose simulations based on the estimated bowtie filter shapes were performed using head and body PMMA phantoms with 16 and 32 cm in diameter. The simulated values of head and body weighted CT dose index (CTDIw) based on bowtie filter shape by the luminescence imaging method agreed within ~9% with the measured values by a dosemeter.
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Affiliation(s)
- C Yamauchi-Kawaura
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - K Fujii
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - M Yamauchi
- Division of Radiology, Aichi Medical University Hospital, Nagakute, Aichi 480-1195, Japan
| | - S Yamamoto
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - M Kozuka
- Department of Radiological Technology, School of Health Sciences, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - N Ohzawa
- Department of Radiological Technology, School of Health Sciences, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - N Suga
- Department of Radiological Technology, School of Health Sciences, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - N Ito
- Department of Radiological Technology, School of Health Sciences, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
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24
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Matsuda N, Fukuda N, Yamauchi M, Tsunoyama Y, Tomita S, Kita M. HIGH BACKGROUND AREA FOR RADIATION EDUCATION. Radiat Prot Dosimetry 2019; 184:294-297. [PMID: 31330016 DOI: 10.1093/rpd/ncz084] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 04/03/2019] [Indexed: 06/10/2023]
Abstract
This paper describes our trial experience of the use of high radiation area for radiation education. We used environmental samples collected from the high radiation area in Fukushima prefecture and India, for the practice of radiation measurement and health risk assessment in Nagasaki University Medical School. We also carried out the field monitoring seminar for students in the existing exposure areas in Tottori prefecture and the Yamakiya observatory in Fukushima. Although the evaluation of educational effectiveness is still underway, both types of education appeared attractive for the students mostly due to the exposure from natural environment in our real life which was not achieved by using an artificial radiation source in a classroom.
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Affiliation(s)
- N Matsuda
- Atomic Bomb Disease Institute, Nagasaki University, 1-12-4 Sakamoto, Nagasaki, Japan
| | - N Fukuda
- Atomic Bomb Disease Institute, Nagasaki University, 1-12-4 Sakamoto, Nagasaki, Japan
| | - M Yamauchi
- Atomic Bomb Disease Institute, Nagasaki University, 1-12-4 Sakamoto, Nagasaki, Japan
| | - Y Tsunoyama
- Radioisotope Research Center, Kyoto University, Yoshida-Konoe-cho, Sakyo-ku, Kyoto, Japan
| | - S Tomita
- Radiation Research and Management Center, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Japan
| | - M Kita
- Organization for Research Initiative and Promotion, Tottori University, 4-101 Koyama-cho Minami, Tottori, Japan
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25
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Razavi-Khosroshahi H, Mohammadzadeh S, Hojamberdiev M, Kitano S, Yamauchi M, Fuji M. BiVO4/BiOX (X = F, Cl, Br, I) heterojunctions for degrading organic dye under visible light. ADV POWDER TECHNOL 2019. [DOI: 10.1016/j.apt.2019.04.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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26
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Razavi-Khosroshahi H, Mohammadzadeh S, Hojamberdiev M, Kitano S, Yamauchi M, Fuji M. Visible light active Bi 3TaO 7 nanosheets for water splitting. Dalton Trans 2019; 48:9284-9290. [PMID: 31162517 DOI: 10.1039/c9dt01020c] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Tantalate semiconductors are potential photocatalysts for hydrogen generation via photocatalytic water splitting reaction because the conduction band of tantalates is composed of the tantalum 5d orbital, which is located at a more negative potential than that of the H+/H2 half reaction, i.e., 0.0 V vs. NHE. Bi3TaO7 is a stable tantalate under acidic or alkaline conditions, with a band gap suitable for visible light absorption. However, the photocatalytic properties of Bi3TaO7 are only reported based on the dye degradation reactions, probably due to the fast electron/hole recombination losses. 2D crystal-like nanosheets with a thickness of a few nanometers show unique features such as high carrier mobility, the quantum Hall effect, high specific surface area, and excellent electrical/thermal conductivity. 2D structures can also enhance the photocatalytic properties because photo-generated charge carriers in nanosheets are less prone to fast recombinations as compared to their bulk counterparts. In this study, nanosheets of Bi3TaO7 are produced by a liquid exfoliation method and the photocatalytic hydrogen generation reaction is investigated for both the as-synthesized Bi3TaO7 nanoparticles and Bi3TaO7 nanosheets.
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27
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Cheng J, Yang J, Kitano S, Juhasz G, Higashi M, Sadakiyo M, Kato K, Yoshioka S, Sugiyama T, Yamauchi M, Nakashima N. Impact of Ir-Valence Control and Surface Nanostructure on Oxygen Evolution Reaction over a Highly Efficient Ir–TiO2 Nanorod Catalyst. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01438] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Junfang Cheng
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Jun Yang
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
| | - Sho Kitano
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Gergely Juhasz
- Department of Chemistry, Graduate School of Science and Technology, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Manabu Higashi
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Masaaki Sadakiyo
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka, 819-0395, Japan
- Department of Chemistry, Faculty of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Kenichi Kato
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - Satoru Yoshioka
- Department of Applied Quantum Physics and Nuclear Engineering, Graduate School of Engineering, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
| | - Takeharu Sugiyama
- Research Center for Synchrotron Light Applications, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
| | - Miho Yamauchi
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka, 819-0395, Japan
- Department of Chemistry, Faculty of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Naotoshi Nakashima
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka, 819-0395, Japan
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28
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Uzawa K, Amelio AL, Tanzawa H, Yamauchi M. Response to Letter to the Editor: "Aberrant Collagen Cross-linking in Human Oral Squamous Cell Carcinoma". J Dent Res 2019; 98:823. [PMID: 31140896 DOI: 10.1177/0022034519853263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- K Uzawa
- 1 Department of Dentistry and Oral-Maxillofacial Surgery, Chiba University Hospital, Chiba, Japan.,2 Department of Oral Science, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - A L Amelio
- 3 Department of Oral and Craniofacial Health Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.,4 Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - H Tanzawa
- 1 Department of Dentistry and Oral-Maxillofacial Surgery, Chiba University Hospital, Chiba, Japan.,2 Department of Oral Science, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - M Yamauchi
- 3 Department of Oral and Craniofacial Health Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
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29
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Kato K, Tanaka Y, Yamauchi M, Ohara K, Hatsui T. A statistical approach to correct X-ray response non-uniformity in microstrip detectors for high-accuracy and high-resolution total-scattering measurements. J Synchrotron Radiat 2019; 26:762-773. [PMID: 31074441 PMCID: PMC6510202 DOI: 10.1107/s1600577519002145] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 02/09/2019] [Indexed: 06/09/2023]
Abstract
An unbiased approach to correct X-ray response non-uniformity in microstrip detectors has been developed based on the statistical estimation that the scattering intensity at a fixed angle from an object is expected to be constant within the Poisson noise. Raw scattering data of SiO2 glass measured by a microstrip detector module was found to show an accuracy of 12σPN at an intensity of 106 photons, where σPN is the standard deviation according to the Poisson noise. The conventional flat-field calibration has failed in correcting the data, whereas the alternative approach used in this article successfully improved the accuracy from 12σPN to 2σPN. This approach was applied to total-scattering data measured by a gapless 15-modular detector system. The quality of the data is evaluated in terms of the Bragg reflections of Si powder, the diffuse scattering of SiO2 glass, and the atomic pair distribution function of TiO2 nanoparticles and Ni powder.
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Affiliation(s)
- Kenichi Kato
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
- JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Yoshihito Tanaka
- Graduate School of Material Science, University of Hyogo, 3-2-1 Kouto, Kamigori-cho, Ako-gun, Hyogo 678-1297, Japan
| | - Miho Yamauchi
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
- Department of Chemistry, Faculty of Science, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Koji Ohara
- Research and Utilization Division, Japan Synchrotron Radiation Research Institute (JASRI, SPring-8), 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Takaki Hatsui
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
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30
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Sadakiyo M, Hata S, Fukushima T, Juhász G, Yamauchi M. Electrochemical hydrogenation of non-aromatic carboxylic acid derivatives as a sustainable synthesis process: from catalyst design to device construction. Phys Chem Chem Phys 2019; 21:5882-5889. [PMID: 30865734 DOI: 10.1039/c8cp07445c] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Electrochemical hydrogenation of a carboxylic acid using water as a hydrogen source is an environmentally friendly synthetic process for upgrading bio-based chemicals. We systematically studied electrochemical hydrogenation of non-aromatic carboxylic acid derivatives on anatase TiO2 by a combination of experimental analyses and density functional theory calculations, which for the first time shed light on mechanistic insights for the electrochemical hydrogenation of carboxylic acids. Development of a substrate permeable TiO2 cathode enabled construction of a flow-type electrolyser, i.e., a so-called polymer electrode alcohol synthesis cell (PEAEC) for the continuous synthesis of an alcoholic compound from a carboxylic acid. We demonstrated the highly efficient and selective conversion of oxalic acid to produce glycolic acid, which can be regarded as direct electric power storage into an easily treatable alcoholic compound.
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Affiliation(s)
- Masaaki Sadakiyo
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Moto-oka 744, Nishi-ku, Fukuoka 819-0395, Japan.
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31
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Ghuman KK, Tozaki K, Sadakiyo M, Kitano S, Oyabe T, Yamauchi M. Tailoring widely used ammonia synthesis catalysts for H and N poisoning resistance. Phys Chem Chem Phys 2019; 21:5117-5122. [PMID: 30766991 DOI: 10.1039/c8cp05800h] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Despite many advancements, an inexpensive ammonia synthesis catalyst free from hydrogen and nitrogen poisoning, and capable of synthesizing ammonia under mild conditions is still unknown and is long sought-after. Here we present an active nanoalloy catalyst, RuFe, formed by alloying highly active Ru and inexpensive Fe, capable of activating both N2 and H2 without blocking the surface active sites and thereby overcoming the major hurdle faced by the current best performing pure metal catalysts. This novel RuFe nanoalloy catalyst operates under milder conditions than the conventional Fe catalyst and is less expensive than the so far best performing Ru-based catalysts providing additional advantages. Most importantly, by integrating theory and experiments, we identified the underlying mechanisms responsible for lower surface poisoning of this catalyst, which will provide directions for fabricating poison-free efficient NH3 synthesis catalysts in future.
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Affiliation(s)
- Kulbir Kaur Ghuman
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan.
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32
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Saito T, Uzawa K, Terajima M, Shiiba M, Amelio A, Tanzawa H, Yamauchi M. Aberrant Collagen Cross-linking in Human Oral Squamous Cell Carcinoma. J Dent Res 2019; 98:517-525. [DOI: 10.1177/0022034519828710] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Tumor progression is a complex process involving extracellular matrix (ECM) remodeling and stiffening. However, the mechanisms that govern these processes and their roles in tumor progression are still poorly understood. In this study, we performed bioinformatics, immunohistochemical, and biochemical analyses to examine if collagen cross-linking is associated with tumor stage and regional lymph node metastasis (RLNM) in oral squamous cell carcinoma (OSCC). We found that the genes encoding key enzymes for cross-linking are frequently overexpressed in oral, head, and neck cancers. Specifically, the enzymes lysyl hydroxylase 2 (LH2) or lysyl oxidase (LOX) and LOX-like 2 (LOXL2) were significantly upregulated in late-stage tumors and associated with poor patient prognosis. The protein levels of these enzymes in the primary human OSCC were also significantly increased in late-stage tumors and markedly elevated in the RLNM-positive tumors. Notably, while overall LOX/LOXL2-catalyzed collagen cross-links were enriched in late-stage and RLNM-positive tumors, LH2-mediated stable cross-links were significantly increased. To our knowledge, this is the first study to investigate the association of collagen cross-linking and expression of key enzymes regulating this process with OSCC stage. The data indicate a critical role for collagen cross-linking in OSCC tumor progression and metastasis, which may provide insights into development of novel therapeutic strategies to prevent OSCC progression.
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Affiliation(s)
- T. Saito
- Department of Dentistry and Oral-Maxillofacial Surgery, Chiba University Hospital, Chiba, Japan
| | - K. Uzawa
- Department of Dentistry and Oral-Maxillofacial Surgery, Chiba University Hospital, Chiba, Japan
- Department of Oral Science, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - M. Terajima
- Department of Oral and Craniofacial Health Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - M. Shiiba
- Department of Medical Oncology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - A.L. Amelio
- Department of Oral and Craniofacial Health Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - H. Tanzawa
- Department of Dentistry and Oral-Maxillofacial Surgery, Chiba University Hospital, Chiba, Japan
- Department of Oral Science, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - M. Yamauchi
- Department of Oral and Craniofacial Health Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
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33
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Yamauchi M, Hata S, Eguchi H, Kitano S, Fukushima T, Higashi M, Sadakiyo M, Kato K. Catalytic enhancement on Ti–Zr complex oxide particles for electrochemical hydrogenation of oxalic acid to produce an alcoholic compound by controlling electronic states and oxide structures. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01541h] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ti0.9Zr0.1O2 complex oxide particles exhibit superior catalytic performances for the direct power storage into glycolic acid via electroreduction of oxalic acid due to favorable crystallinity.
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Affiliation(s)
- M. Yamauchi
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)
- Kyushu University
- Nishi-ku
- Japan
| | - S. Hata
- Department of Applied Chemistry
- Faculty of Engineering
- Sanyo-Onoda City University
- Sanyo-Onoda
- Japan
| | - H. Eguchi
- Department of Chemistry
- Graduate School of Science
- Kyushu University
- Nishi-ku
- Japan
| | - S. Kitano
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)
- Kyushu University
- Nishi-ku
- Japan
| | - T. Fukushima
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)
- Kyushu University
- Nishi-ku
- Japan
| | - M. Higashi
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)
- Kyushu University
- Nishi-ku
- Japan
| | - M. Sadakiyo
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)
- Kyushu University
- Nishi-ku
- Japan
| | - K. Kato
- RIKEN SPring-8 Center
- Sayo-gun
- Japan
- JST
- PRESTO
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34
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Yamauchi-Kawaura C, Yamamoto S, Fujii K, Komori M, Yamauchi M, Ohzawa N, Kozuka M, Suga N, Ito N, Fukuyama A. MEASUREMENT OF INTERNAL RADIATION DOSE DISTRIBUTION IN CT EXAMINATIONS USING POLYETHYLENE TEREPHTHALATE RESIN. Radiat Prot Dosimetry 2018; 181:303-309. [PMID: 29444315 DOI: 10.1093/rpd/ncy026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Accepted: 02/06/2018] [Indexed: 06/08/2023]
Abstract
This study proposes a new dosimetry method for the estimation of the internal radiation dose distribution of a subject undergoing computed tomography (CT) examinations. In this novel method, dose distribution of a subject by CT scans was estimated based on radiophotoluminance distribution with polyethylene terephthalate (PET) resin which was cut to the average head size of a Japanese 1-year-old child. The difference in dose distribution depending on the type of bowtie filter was visualized by imaging luminance distribution with the PET phantom using a charge-coupled device camera. Dose distribution images simulated from a water phantom of the same size as the PET phantom were compared with the luminance distribution images. The linear correlation was demonstrated between luminance of the PET phantom and the simulated water dose. In comparison with the simulated water doses and the converted water doses from luminance of the PET phantom, the relative differences were within 20%.
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Affiliation(s)
- C Yamauchi-Kawaura
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya, Japan
| | - S Yamamoto
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya, Japan
| | - K Fujii
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya, Japan
| | - M Komori
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya, Japan
| | - M Yamauchi
- Division of Radiology, Aichi Medical University Hospital, Nagakute, Aichi, Japan
| | - N Ohzawa
- Department of Radiological Technology, School of Health Sciences, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya, Japan
| | - M Kozuka
- Department of Radiological Technology, School of Health Sciences, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya, Japan
| | - N Suga
- Department of Radiological Technology, School of Health Sciences, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya, Japan
| | - N Ito
- Department of Radiological Technology, School of Health Sciences, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya, Japan
| | - A Fukuyama
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya, Japan
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35
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Kobayashi H, Yamauchi M, Ikeda R, Yamamoto T, Matsumura S, Kitagawa H. Double enhancement of hydrogen storage capacity of Pd nanoparticles by 20 at% replacement with Ir; systematic control of hydrogen storage in Pd-M nanoparticles (M = Ir, Pt, Au). Chem Sci 2018; 9:5536-5540. [PMID: 30210762 PMCID: PMC6124882 DOI: 10.1039/c8sc01460d] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Accepted: 05/08/2018] [Indexed: 11/21/2022] Open
Abstract
We report on binary solid-solution nanoparticles (NPs) composed of Pd and Ir, which are not miscible at the equilibrium state of the bulk, for the first time, by means of a process of hydrogen absorption/desorption from core (Pd)/shell (Ir) NPs. Only 20 at% replacement with Ir atoms doubled the hydrogen-storage capability compared to Pd NPs, which are a representative hydrogen-storage material. Furthermore, the systematic control of hydrogen concentrations and the corresponding pressure in Pd and Pd-M NPs (M = Ir, Pt, Au) have been achieved based on the band filling control of Pd NPs.
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Affiliation(s)
- Hirokazu Kobayashi
- Division of Chemistry , Graduate School of Science , Kyoto University , Kitashirakawa-Oiwakecho, Sakyo-ku , Kyoto , 606-8502 , Japan . ;
- JST , PRESTO, 4-1-8 Honcho, Kawaguchi , Saitama , 332-0012 , Japan
| | - Miho Yamauchi
- International Institute for Carbon-Neutral Energy Research (I2CNER) , Kyushu University , 744 Motooka, Nishi-ku , Fukuoka , 819-0395 , Japan
| | - Ryuichi Ikeda
- Division of Chemistry , Graduate School of Science , Kyoto University , Kitashirakawa-Oiwakecho, Sakyo-ku , Kyoto , 606-8502 , Japan . ;
| | - Tomokazu Yamamoto
- Department of Applied Quantum Physics and Nuclear Engineering , Graduate School of Engineering , Kyushu University , Motooka 744, Nishi-ku , Fukuoka , 819-0395 , Japan
- The Ultramicroscopy Research Center , Kyushu University , Motooka 744, Nishi-ku , Fukuoka , 819-0395 , Japan
| | - Syo Matsumura
- Department of Applied Quantum Physics and Nuclear Engineering , Graduate School of Engineering , Kyushu University , Motooka 744, Nishi-ku , Fukuoka , 819-0395 , Japan
- The Ultramicroscopy Research Center , Kyushu University , Motooka 744, Nishi-ku , Fukuoka , 819-0395 , Japan
- Inamori Frontier Research Center , Kyushu University , 744 Motooka, Nishi-ku , Fukuoka , 819-0395 , Japan
| | - Hiroshi Kitagawa
- Division of Chemistry , Graduate School of Science , Kyoto University , Kitashirakawa-Oiwakecho, Sakyo-ku , Kyoto , 606-8502 , Japan . ;
- Inamori Frontier Research Center , Kyushu University , 744 Motooka, Nishi-ku , Fukuoka , 819-0395 , Japan
- Institute for Integrated Cell-Material Sciences (iCeMS) , Kyoto University , Yoshida, Sakyo-ku , Kyoto , 606-8501 , Japan
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36
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Ozawa N, Chieda S, Higuchi Y, Takeguchi T, Yamauchi M, Kubo M. First-principles calculation of activity and selectivity of the partial oxidation of ethylene glycol on Fe(0 0 1), Co(0 0 0 1), and Ni(1 1 1). J Catal 2018. [DOI: 10.1016/j.jcat.2018.03.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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37
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Fukushima T, Kitano S, Hata S, Yamauchi M. Carbon-neutral energy cycles using alcohols. Sci Technol Adv Mater 2018; 19:142-152. [PMID: 29511392 PMCID: PMC5827732 DOI: 10.1080/14686996.2018.1426340] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 12/28/2017] [Accepted: 01/08/2018] [Indexed: 05/27/2023]
Abstract
We demonstrated carbon-neutral (CN) energy circulation using glycolic acid (GC)/oxalic acid (OX) redox couple. Here, we report fundamental studies on both catalyst search for power generation process, i.e. GC oxidation, and elemental steps for fuel generation process, i.e. OX reduction, in CN cycle. The catalytic activity test on various transition metals revealed that Rh, Pd, Ir, and Pt have preferable features as a catalyst for electrochemical oxidation of GC. A carbon-supported Pt catalyst in alkaline conditions exhibited higher activity, durability, and product selectivity for electrooxidation of GC rather than those in acidic media. The kinetic study on OX reduction clearly indicated that OX reduction undergoes successive two-electron reductions to form GC. Furthermore, application of TiO2 catalysts with large specific area for electrochemical reduction of OX facilitates the selective formation of GC.
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Affiliation(s)
- Takashi Fukushima
- International Institute for Carbon-Neutral Energy Research, Kyushu University, Fukuoka, Japan
| | - Sho Kitano
- International Institute for Carbon-Neutral Energy Research, Kyushu University, Fukuoka, Japan
| | - Shinichi Hata
- International Institute for Carbon-Neutral Energy Research, Kyushu University, Fukuoka, Japan
| | - Miho Yamauchi
- International Institute for Carbon-Neutral Energy Research, Kyushu University, Fukuoka, Japan
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38
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Sadakiyo M, Hata S, Cui X, Yamauchi M. Electrochemical Production of Glycolic Acid from Oxalic Acid Using a Polymer Electrolyte Alcohol Electrosynthesis Cell Containing a Porous TiO 2 Catalyst. Sci Rep 2017; 7:17032. [PMID: 29234034 PMCID: PMC5727030 DOI: 10.1038/s41598-017-17036-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Accepted: 11/20/2017] [Indexed: 11/23/2022] Open
Abstract
A liquid flow-type electrolyser that continuously produces an alcohol from a carboxylic acid was constructed by employing a polymer electrolyte, named a polymer electrolyte alcohol electrosynthesis cell (PEAEC). Glycolic acid (GC, an alcoholic compound) is generated on anatase TiO2 catalysts via four-electron reduction of oxalic acid (OX, a divalent carboxylic acid), accompanied with water oxidation, which achieves continuous electric power storage in easily stored GC. Porous anatase TiO2 directly grown on Ti mesh (TiO2/Ti-M) or Ti felt (TiO2/Ti-F) was newly fabricated as a cathode having favourable substrate diffusivity. A membrane-electrode assembly composed of the TiO2/Ti-M, Nafion 117, and an IrO2 supported on a gas-diffusion carbon electrode (IrO2/C) was applied to the PEAEC. We achieved a maximum energy conversion efficiency of 49.6% and a continuous 99.8% conversion of 1 M OX, which is an almost saturated aqueous solution at room temperature.
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Affiliation(s)
- Masaaki Sadakiyo
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku Fukuoka, 819-0395, Japan. .,Department of Chemistry, Faculty of Science, Kyushu University, 744 Moto-oka, Nishi-ku Fukuoka, 819-0395, Japan.
| | - Shinichi Hata
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku Fukuoka, 819-0395, Japan
| | - Xuedong Cui
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku Fukuoka, 819-0395, Japan
| | - Miho Yamauchi
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku Fukuoka, 819-0395, Japan. .,Department of Chemistry, Faculty of Science, Kyushu University, 744 Moto-oka, Nishi-ku Fukuoka, 819-0395, Japan.
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39
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Iida H, Iguchi S, Yamauchi M, Koshino K, Yasuno F, Fukuda T. [Clinical Applications of Positron Emission Tomography for Neurosurgery(1)Current Status and Future Directions of Neuro-PET]. No Shinkei Geka 2017; 45:723-736. [PMID: 28790219 DOI: 10.11477/mf.1436203582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Hidehiro Iida
- Department of Radiology, National Cerebral and Cardiovascular Center
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40
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Guo H, Tsai CL, Chen Y, Terajima M, Yamauchi M, Alvarado S, Cho E, Dalby K, Phillips G, Tainer J, Kurie J. Structure-Based Drug Design Targeting a Pro-Metastatic Collagen Lysyl Hydroxylase. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.06.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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41
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Sadakiyo M, Kuramoto T, Kato K, Yamauchi M. Introduction of an Amino Group on Zeolitic Imidazolate Framework through a Ligand-exchange Reaction. CHEM LETT 2017. [DOI: 10.1246/cl.170323] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Masaaki Sadakiyo
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395
- Department of Chemistry, Faculty of Science, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395
| | - Takahiro Kuramoto
- Department of Chemistry, Faculty of Science, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395
| | - Kenichi Kato
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148
| | - Miho Yamauchi
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395
- Department of Chemistry, Faculty of Science, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395
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42
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Tsuchiya B, Nagata S, Toh K, Shikama T, Yamauchi M, Nishitani T. Radiation Damage of Proton Conductive Ceramics Under 14 MeV Fast Neutron Irradiation. Fusion Science and Technology 2017. [DOI: 10.13182/fst05-a800] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- B. Tsuchiya
- Institute for Materials Research, Tohoku University: 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japan, and
| | - S. Nagata
- Institute for Materials Research, Tohoku University: 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japan, and
| | - K. Toh
- Institute for Materials Research, Tohoku University: 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japan, and
| | - T. Shikama
- Institute for Materials Research, Tohoku University: 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japan, and
| | - M. Yamauchi
- Japan Atomic Energy Research Institute, Tokai Research Establishment: Facility of Fast Neutron Source, Tokai-mura, Ibaraki 319-1195, Japan, and
| | - T. Nishitani
- Japan Atomic Energy Research Institute, Tokai Research Establishment: Facility of Fast Neutron Source, Tokai-mura, Ibaraki 319-1195, Japan, and
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43
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Yoshimaru S, Sadakiyo M, Staykov A, Kato K, Yamauchi M. Modulation of the catalytic activity of Pt nanoparticles through charge-transfer interactions with metal–organic frameworks. Chem Commun (Camb) 2017; 53:6720-6723. [DOI: 10.1039/c7cc02829f] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A charge transfer interaction between Pt nanoparticles and MOFs modulated the catalytic activity of Pt for a CO oxidation reaction.
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Affiliation(s)
- Shotaro Yoshimaru
- Department of Chemistry
- Faculty of Science
- Kyushu University
- Fukuoka 819-0395
- Japan
| | - Masaaki Sadakiyo
- Department of Chemistry
- Faculty of Science
- Kyushu University
- Fukuoka 819-0395
- Japan
| | - Aleksandar Staykov
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)
- Kyushu University
- Fukuoka 819-0395
- Japan
| | | | - Miho Yamauchi
- Department of Chemistry
- Faculty of Science
- Kyushu University
- Fukuoka 819-0395
- Japan
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44
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Ma S, Sadakiyo M, Heima M, Luo R, Haasch RT, Gold JI, Yamauchi M, Kenis PJA. Electroreduction of Carbon Dioxide to Hydrocarbons Using Bimetallic Cu-Pd Catalysts with Different Mixing Patterns. J Am Chem Soc 2016; 139:47-50. [PMID: 27958727 DOI: 10.1021/jacs.6b10740] [Citation(s) in RCA: 360] [Impact Index Per Article: 45.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Electrochemical conversion of CO2 holds promise for utilization of CO2 as a carbon feedstock and for storage of intermittent renewable energy. Presently Cu is the only metallic electrocatalyst known to reduce CO2 to appreciable amounts of hydrocarbons, but often a wide range of products such as CO, HCOO-, and H2 are formed as well. Better catalysts that exhibit high activity and especially high selectivity for specific products are needed. Here a range of bimetallic Cu-Pd catalysts with ordered, disordered, and phase-separated atomic arrangements (Cuat:Pdat = 1:1), as well as two additional disordered arrangements (Cu3Pd and CuPd3 with Cuat:Pdat = 3:1 and 1:3), are studied to determine key factors needed to achieve high selectivity for C1 or C2 chemicals in CO2 reduction. When compared with the disordered and phase-separated CuPd catalysts, the ordered CuPd catalyst exhibits the highest selectivity for C1 products (>80%). The phase-separated CuPd and Cu3Pd achieve higher selectivity (>60%) for C2 chemicals than CuPd3 and ordered CuPd, which suggests that the probability of dimerization of C1 intermediates is higher on surfaces with neighboring Cu atoms. Based on surface valence band spectra, geometric effects rather than electronic effects seem to be key in determining the selectivity of bimetallic Cu-Pd catalysts. These results imply that selectivities to different products can be tuned by geometric arrangements. This insight may benefit the design of catalytic surfaces that further improve activity and selectivity for CO2 reduction.
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Affiliation(s)
- Sichao Ma
- Dept. of Chemistry and Chemical and Biomolecular Engineering, UIUC , 600 S. Mathews Ave., Urbana, Illinois 61801, United States.,International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University , 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Masaaki Sadakiyo
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University , 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan.,CREST, JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Minako Heima
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University , 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan.,CREST, JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Raymond Luo
- Dept. of Chemistry and Chemical and Biomolecular Engineering, UIUC , 600 S. Mathews Ave., Urbana, Illinois 61801, United States
| | - Richard T Haasch
- Frederick Seitz Materials Research Laboratory, UIUC , 104 S. Goodwin Ave., Urbana, Illinois 61801, United States
| | - Jake I Gold
- Dept. of Chemistry and Chemical and Biomolecular Engineering, UIUC , 600 S. Mathews Ave., Urbana, Illinois 61801, United States
| | - Miho Yamauchi
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University , 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan.,CREST, JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Paul J A Kenis
- Dept. of Chemistry and Chemical and Biomolecular Engineering, UIUC , 600 S. Mathews Ave., Urbana, Illinois 61801, United States.,International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University , 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
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45
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Abstract
Several studies have indicated differences in bond strength of dental materials to crown and root dentin. To investigate the potential differences in matrix properties between these locations, we analyzed upper root and crown dentin in human third molars for ultimate tensile strength and collagen biochemistry. In both locations, tensile strength tested perpendicular to the direction of dentinal tubules (undemineralized crown = 140.4 ± 48.6/root = 95.9 ± 26.1; demineralized crown = 16.6 ± 6.3/root = 29.0 ± 12.4) was greater than that tested parallel to the tubular direction (undemineralized crown = 73.1 ± 21.2/root = 63.2 ± 22.6; demineralized crown = 9.0 ± 3.9/root = 16.2 ± 8.0). The demineralized specimens showed significantly greater tensile strength in root than in crown. Although the collagen content was comparable in both locations, two major collagen cross-links, dehydrodihydroxylysinonorleucine/its ketoamine and pyridinoline, were significantly higher in the root (by ~ 30 and ~ 55%, respectively) when compared with those in the crown. These results indicate that the profile of collagen cross-linking varies as a function of anatomical location in dentin and that the difference may partly explain the site-specific tensile strength.
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Affiliation(s)
- P A Miguez
- Dental Research Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7455, USA
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46
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Yamauchi-Kawaura C, Fujii K, Akahane K, Yamauchi M, Obara S, Narai K, Katsu T, Imai K, Ikeda M. DEVELOPMENT OF AGE-SPECIFIC JAPANESE PHYSICAL PHANTOMS FOR DOSE EVALUATION IN INFANT CT EXAMINATIONS. Radiat Prot Dosimetry 2016; 171:483-502. [PMID: 26420904 DOI: 10.1093/rpd/ncv420] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 09/03/2015] [Accepted: 09/04/2015] [Indexed: 06/05/2023]
Abstract
Secondary to the previous development of age-specific Japanese head phantoms, the authors designed Japanese torso phantoms for dose assessment in infant computed tomography (CT) examinations and completed a Japanese 3-y-old head-torso phantom. For design of age-specific torso phantoms (0, 0.5, 1 and 3 y old), anatomical structures were measured from CT images of Japanese infant patients. From the CT morphometry, it was found that rib cages of Japanese infants were smaller than those in Europeans and Americans. Radiophotoluminescence glass dosemeters were used for dose measurement of a 3-y-old head-torso phantom. To examine the validity of the developed phantom, organ and effective doses by the in-phantom dosimetry system were compared with simulation values in a web-based CT dose calculation system (WAZA-ARI). The differences in doses between the two systems were <20 % at the doses of organs within scan regions and effective doses in head, chest and abdominopelvic CT examinations.
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Affiliation(s)
- C Yamauchi-Kawaura
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - K Fujii
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - K Akahane
- Medical Exposure Research Promotion Section, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - M Yamauchi
- Division of Radiology, Aichi Medical University Hospital, Nagakute, Aichi 480-1195, Japan
| | - S Obara
- Medical Exposure Research Promotion Section, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - K Narai
- Techno-Rad, Inc., 50-8, Higashi Arami, Tai, Miyama-cho, Kuze-gun, Kyoto 613-0036, Japan
| | - T Katsu
- Division of Radiology, Nagoya University Hospital, Tsurumai-cho, Showa-ku, Nagoya 466-8560, Japan
| | - K Imai
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - M Ikeda
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
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47
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Abstract
In the title coordination polymer, [Zn2(C6H10N3)3(NO3)]
n
, two independent ZnII ions are tetrahedrally coordinated by the anionic ligands, viz. 2-[(dimethylamino)methyl]imidazolate or nitrate ions. One ZnII ion is coordinated by the imidazolate N atoms of three anions and an O atom of the nitrate ion. The second ZnII ion is coordinated by imidazolate N atoms of three anions and one amino N atom of one such ligand. The 2-[(dimethylamino)methyl]imidazolate anions are bridging the ZnII ions to form a helical chain structure along [001]. The chains are further linked by the bridging ligands into a three-dimensional framework structure. The nitrate anion is disordered over two sets of sites and was refined with two pairs of three O atoms using half-occupancy for each O atom.
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48
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Razavi-Khosroshahi H, Edalati K, Hirayama M, Emami H, Arita M, Yamauchi M, Hagiwara H, Ida S, Ishihara T, Akiba E, Horita Z, Fuji M. Visible-Light-Driven Photocatalytic Hydrogen Generation on Nanosized TiO2-II Stabilized by High-Pressure Torsion. ACS Catal 2016. [DOI: 10.1021/acscatal.6b01482] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Kaveh Edalati
- International
Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 812-8581, Japan
- Department
of Materials Science and Engineering, Faculty of Engineering, Kyushu University, Fukuoka 812-8581, Japan
| | - Masashige Hirayama
- Department
of Chemistry, Faculty of Sciences, Kyushu University, Fukuoka 812-8581, Japan
| | - Hoda Emami
- International
Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 812-8581, Japan
| | - Makoto Arita
- Department
of Materials Science and Engineering, Faculty of Engineering, Kyushu University, Fukuoka 812-8581, Japan
| | - Miho Yamauchi
- International
Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 812-8581, Japan
- Department
of Chemistry, Faculty of Sciences, Kyushu University, Fukuoka 812-8581, Japan
| | - Hidehisa Hagiwara
- International
Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 812-8581, Japan
- Department
of Applied Chemistry, Faculty of Engineering, Kyushu University, Fukuoka 812-8581, Japan
| | - Shintaro Ida
- International
Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 812-8581, Japan
- Department
of Applied Chemistry, Faculty of Engineering, Kyushu University, Fukuoka 812-8581, Japan
| | - Tatsumi Ishihara
- International
Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 812-8581, Japan
- Department
of Applied Chemistry, Faculty of Engineering, Kyushu University, Fukuoka 812-8581, Japan
| | - Etsuo Akiba
- International
Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 812-8581, Japan
- Department
of Mechanical Engineering, Faculty of Engineering, Kyushu University, Fukuoka 812-8581, Japan
| | - Zenji Horita
- International
Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 812-8581, Japan
- Department
of Materials Science and Engineering, Faculty of Engineering, Kyushu University, Fukuoka 812-8581, Japan
| | - Masayoshi Fuji
- Advanced
Ceramics Research Center, Nagoya Institute of Technology, Tajimi 507-0033, Japan
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49
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Yamauchi M, Ozawa N, Kubo M. Experimental and Quantum Chemical Approaches to Develop Highly Selective Nanocatalysts for CO2-free Power Circulation. CHEM REC 2016; 16:2249-2259. [DOI: 10.1002/tcr.201600047] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Indexed: 01/01/2023]
Affiliation(s)
- Miho Yamauchi
- International Institute for Carbon-Neutral Energy Research (WPI-I CNER), Kyushu University; Motooka 744 Nishi-ku Fukuoka 819-0395 Japan
| | - Nobuki Ozawa
- Institute for Materials Research, Tohoku University; 2-1-1 Katahira Aoba-ku Sendai 980-8577 Japan
| | - Momoji Kubo
- Institute for Materials Research, Tohoku University; 2-1-1 Katahira Aoba-ku Sendai 980-8577 Japan
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50
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Kato K, Kasai H, Hori A, Takata M, Tanaka H, Kitagawa S, Kobayashi A, Ozawa N, Kubo M, Arikawa H, Takeguchi T, Sadakiyo M, Yamauchi M. Superionic Conduction in Co-Vacant P2-Nax CoO2 Created by Hydrogen Reductive Elimination. Chem Asian J 2016; 11:1537-41. [PMID: 27123554 PMCID: PMC5084920 DOI: 10.1002/asia.201600370] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Indexed: 11/08/2022]
Abstract
The layered P2‐NaxMO2 (M: transition metal) system has been widely recognized as electronic or mixed conductor. Here, we demonstrate that Co vacancies in P2‐NaxCoO2 created by hydrogen reductive elimination lead to an ionic conductivity of 0.045 S cm−1 at 25 °C. Using in situ synchrotron X‐ray powder diffraction and Raman spectroscopy, the composition of the superionic conduction phase is evaluated to be Na0.61(H3O)0.18Co0.93O2. Electromotive force measurements as well as molecular dynamics simulations indicate that the ion conducting species is proton rather than hydroxide ion. The fact that the Co‐stoichiometric compound Nax(H3O)yCoO2 does not exhibit any significant ionic conductivity proves that Co vacancies are essential for the occurrence of superionic conductivity.
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Affiliation(s)
- Kenichi Kato
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5148, Japan. .,CREST, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan.
| | - Hidetaka Kasai
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5148, Japan.,CREST, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan.,Faculty of Pure and Applied Sciences, TIMS, CiRfSE, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8571, Japan
| | - Akihiro Hori
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5148, Japan.,Institute for Integrated Cell-Material Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Masaki Takata
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5148, Japan.,Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Hiroshi Tanaka
- Department of Materials Science, Shimane University, 1060 Nishi-kawatsu-cho, Matsue, Shimane, 690-8504, Japan
| | - Susumu Kitagawa
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5148, Japan.,Institute for Integrated Cell-Material Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Akira Kobayashi
- Graduate School of Engineering, Tohoku University, 6-6-11 Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan
| | - Nobuki Ozawa
- CREST, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan.,Graduate School of Engineering, Tohoku University, 6-6-11 Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan.,Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Momoji Kubo
- Graduate School of Engineering, Tohoku University, 6-6-11 Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan.,Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Hidekazu Arikawa
- CREST, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan.,Department of Chemistry and Bioengineering, Iwate University, 4-3-5 Ueda, Morioka, Iwate, 020-8551, Japan
| | - Tatsuya Takeguchi
- CREST, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan.,Department of Chemistry and Bioengineering, Iwate University, 4-3-5 Ueda, Morioka, Iwate, 020-8551, Japan
| | - Masaaki Sadakiyo
- CREST, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan.,International Institute for Carbon-Neutral Energy Research, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Miho Yamauchi
- CREST, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan.,International Institute for Carbon-Neutral Energy Research, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
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