99901
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Castanheira L, Silva WO, Lima FH, Crisci A, Dubau L, Maillard F. Carbon Corrosion in Proton-Exchange Membrane Fuel Cells: Effect of the Carbon Structure, the Degradation Protocol, and the Gas Atmosphere. ACS Catal 2015. [DOI: 10.1021/cs501973j] [Citation(s) in RCA: 247] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Luis Castanheira
- Univ. Grenoble Alpes, LEPMI, F-38000 Grenoble, France
- CNRS, LEPMI, F-38000 Grenoble, France
| | - Wanderson O. Silva
- Instituto
de Química de São Carlos, Universidade de São Paulo, CEP
13560-970, CP 780 São Carlos, SP, Brazil
| | - Fabio H.B. Lima
- Instituto
de Química de São Carlos, Universidade de São Paulo, CEP
13560-970, CP 780 São Carlos, SP, Brazil
| | - Alexandre Crisci
- Univ. Grenoble Alpes, SIMAP, F-38000 Grenoble, France
- CNRS, SIMAP, F-38000 Grenoble, France
| | - Laetitia Dubau
- Univ. Grenoble Alpes, LEPMI, F-38000 Grenoble, France
- CNRS, LEPMI, F-38000 Grenoble, France
| | - Frédéric Maillard
- Univ. Grenoble Alpes, LEPMI, F-38000 Grenoble, France
- CNRS, LEPMI, F-38000 Grenoble, France
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99902
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Babu G, Ababtain K, Ng KYS, Arava LMR. Electrocatalysis of lithium polysulfides: current collectors as electrodes in Li/S battery configuration. Sci Rep 2015; 5:8763. [PMID: 25740731 PMCID: PMC4350110 DOI: 10.1038/srep08763] [Citation(s) in RCA: 153] [Impact Index Per Article: 17.0] [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: 10/03/2014] [Accepted: 01/19/2015] [Indexed: 12/23/2022] Open
Abstract
Lithium Sulfur (Li/S) chemistries are amongst the most promising next-generation battery technologies due to their high theoretical energy density. However, the detrimental effects of their intermediate byproducts, polysulfides (PS), have to be resolved to realize these theoretical performance limits. Confined approaches on using porous carbons to entrap PS have yielded limited success. In this study, we deviate from the prevalent approach by introducing catalysis concept in Li/S battery configuration. Engineered current collectors were found to be catalytically active towards PS, thereby eliminating the need for carbon matrix and their processing obligatory binders, additives and solvents. We reveal substantial enhancement in electrochemical performance and corroborate our findings using a detailed experimental parametric study involving variation of several kinetic parameters such as surface area, temperature, current rate and concentration of PS. The resultant novel battery configuration delivered a discharge capacity of 700 mAh g−1 with the two dimensional (2D) planar Ni current collectors and an enhancement in the capacity up to 900 mAh g−1 has been realized using the engineered three dimensional (3D) current collectors. The battery capacity has been tested for stability over 100 cycles of charge-discharge.
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Affiliation(s)
- Ganguli Babu
- Department of Mechanical Engineering, Wayne State University, Detroit. MI 48202, USA
| | - Khalid Ababtain
- Department of Mechanical Engineering, Wayne State University, Detroit. MI 48202, USA
| | - K Y Simon Ng
- Department of Chemical Engineering and Materials Science, Wayne State University, Detroit. MI 48202, USA
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99903
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Todoroki N, Kato T, Hayashi T, Takahashi S, Wadayama T. Pt–Ni Nanoparticle-Stacking Thin Film: Highly Active Electrocatalysts for Oxygen Reduction Reaction. ACS Catal 2015. [DOI: 10.1021/acscatal.5b00065] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Naoto Todoroki
- Graduate School of Environmental
Studies, Tohoku University, Sendai 980-8579, Japan
| | - Takashi Kato
- Graduate School of Environmental
Studies, Tohoku University, Sendai 980-8579, Japan
| | - Takehiro Hayashi
- Graduate School of Environmental
Studies, Tohoku University, Sendai 980-8579, Japan
| | - Shuntaro Takahashi
- Graduate School of Environmental
Studies, Tohoku University, Sendai 980-8579, Japan
| | - Toshimasa Wadayama
- Graduate School of Environmental
Studies, Tohoku University, Sendai 980-8579, Japan
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99904
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NAKAYAMA M, JALEM R, KASUGA T. 2.計算科学から見たナトリウムイオン電池. ELECTROCHEMISTRY 2015. [DOI: 10.5796/electrochemistry.83.176] [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: 11/20/2022] Open
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99905
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Joss L, Gazzani M, Hefti M, Marx D, Mazzotti M. Temperature Swing Adsorption for the Recovery of the Heavy Component: An Equilibrium-Based Shortcut Model. Ind Eng Chem Res 2015. [DOI: 10.1021/ie5048829] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lisa Joss
- ETH Zurich, Institute of Process
Engineering, Sonneggstrasse
3, CH-8092 Zurich, Switzerland
| | - Matteo Gazzani
- ETH Zurich, Institute of Process
Engineering, Sonneggstrasse
3, CH-8092 Zurich, Switzerland
| | - Max Hefti
- ETH Zurich, Institute of Process
Engineering, Sonneggstrasse
3, CH-8092 Zurich, Switzerland
| | - Dorian Marx
- ETH Zurich, Institute of Process
Engineering, Sonneggstrasse
3, CH-8092 Zurich, Switzerland
| | - Marco Mazzotti
- ETH Zurich, Institute of Process
Engineering, Sonneggstrasse
3, CH-8092 Zurich, Switzerland
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99906
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McCarthy BD, Donley CL, Dempsey JL. Electrode initiated proton-coupled electron transfer to promote degradation of a nickel(ii) coordination complex. Chem Sci 2015; 6:2827-2834. [PMID: 29403633 PMCID: PMC5761499 DOI: 10.1039/c5sc00476d] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [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: 02/07/2015] [Accepted: 02/25/2015] [Indexed: 11/21/2022] Open
Abstract
A Ni(ii) bisphosphine dithiolate compound degrades into an electrode-adsorbed film that can evolve hydrogen under reducing and protic conditions. An electrochemical study suggests that the degradation mechanism involves an initial concerted proton-electron transfer. The potential susceptibility of Ni-S bonds in molecular hydrogen evolution catalysts to degradation via C-S bond cleavage is discussed.
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Affiliation(s)
- Brian D McCarthy
- Department of Chemistry , University of North Carolina , Chapel Hill , North Carolina 27599-3290 , USA .
| | - Carrie L Donley
- Chapel Hill Analytical and Nanofabrication Laboratory , Department of Applied Physical Sciences , University of North Carolina , Chapel Hill , North Carolina 27599-3216 , USA
| | - Jillian L Dempsey
- Department of Chemistry , University of North Carolina , Chapel Hill , North Carolina 27599-3290 , USA .
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99907
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Froehlich JD, Kubiak CP. The Homogeneous Reduction of CO2 by [Ni(cyclam)]+: Increased Catalytic Rates with the Addition of a CO Scavenger. J Am Chem Soc 2015; 137:3565-73. [DOI: 10.1021/ja512575v] [Citation(s) in RCA: 178] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Jesse D. Froehlich
- Department of Chemistry and
Biochemistry, University of California, San Diego, 9500 Gilman
Drive, La Jolla, California 92093-0358, United States
| | - Clifford P. Kubiak
- Department of Chemistry and
Biochemistry, University of California, San Diego, 9500 Gilman
Drive, La Jolla, California 92093-0358, United States
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99908
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Sheng R, Liu Q, Xiao M, Gu C, Hu T, Ren J, Sun M, Yang R. Novel pendent thiophene side-chained benzodithiophene for polymer solar cells. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/pola.27585] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Ruiying Sheng
- Institute of Materials Science and Engineering, Ocean University of China; Qingdao 266100 People's Republic of China
- CAS Key Laboratory of Bio-Based Materials; Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences; Qingdao 266101 People's Republic of China
| | - Qian Liu
- Institute of Materials Science and Engineering, Ocean University of China; Qingdao 266100 People's Republic of China
- CAS Key Laboratory of Bio-Based Materials; Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences; Qingdao 266101 People's Republic of China
| | - Manjun Xiao
- CAS Key Laboratory of Bio-Based Materials; Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences; Qingdao 266101 People's Republic of China
| | - Chunyang Gu
- CAS Key Laboratory of Bio-Based Materials; Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences; Qingdao 266101 People's Republic of China
| | - Tong Hu
- Institute of Materials Science and Engineering, Ocean University of China; Qingdao 266100 People's Republic of China
- CAS Key Laboratory of Bio-Based Materials; Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences; Qingdao 266101 People's Republic of China
| | - Junzhen Ren
- Institute of Materials Science and Engineering, Ocean University of China; Qingdao 266100 People's Republic of China
- CAS Key Laboratory of Bio-Based Materials; Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences; Qingdao 266101 People's Republic of China
| | - Mingliang Sun
- Institute of Materials Science and Engineering, Ocean University of China; Qingdao 266100 People's Republic of China
| | - Renqiang Yang
- CAS Key Laboratory of Bio-Based Materials; Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences; Qingdao 266101 People's Republic of China
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99909
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Ørnsø KB, Garcia-Lastra JM, De La Torre G, Himpsel FJ, Rubio A, Thygesen KS. Design of two-photon molecular tandem architectures for solar cells by ab initio theory. Chem Sci 2015; 6:3018-3025. [PMID: 29142685 PMCID: PMC5657411 DOI: 10.1039/c4sc03835e] [Citation(s) in RCA: 9] [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: 12/11/2014] [Accepted: 03/04/2015] [Indexed: 11/27/2022] Open
Abstract
We present new two-photon molecular architectures for photovoltaics where atomic precision can be obtained by synthetic chemistry.
An extensive database of spectroscopic properties of molecules from ab initio calculations is used to design molecular complexes for use in tandem solar cells that convert two photons into a single electron–hole pair, thereby increasing the output voltage while covering a wider spectral range. Three different architectures are considered: the first two involve a complex consisting of two dye molecules with appropriately matched frontier orbitals, connected by a molecular diode. Optimized combinations of dye molecules are determined by taking advantage of our computational database of the structural and energetic properties of several thousand porphyrin dyes. The third design is a molecular analogy of the intermediate band solar cell, and involves a single dye molecule with strong intersystem crossing to ensure a long lifetime of the intermediate state. Based on the calculated energy levels and molecular orbitals, energy diagrams are presented for the individual steps in the operation of such tandem solar cells. We find that theoretical open circuit voltages of up to 1.8 V can be achieved using these tandem designs. Questions about the practical implementation of prototypical devices, such as the synthesis of the tandem molecules and potential loss mechanisms, are addressed.
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Affiliation(s)
- Kristian B Ørnsø
- Center for Atomic-scale Materials Design , Department of Physics , Technical University of Denmark , 2800 Kgs. Lyngby , Denmark . ;
| | - Juan M Garcia-Lastra
- Center for Atomic-scale Materials Design , Department of Physics , Technical University of Denmark , 2800 Kgs. Lyngby , Denmark . ; .,Department of Energy Conversion , Technical University of Denmark , Frederiksborgvej 399 , 4000 Roskilde , Denmark
| | - Gema De La Torre
- Departamento de Quimica Organica , Facultad de Ciencias , Universidad Autonoma de Madrid , Campus de Cantoblanco , 28049 Madrid , Spain
| | - F J Himpsel
- Department of Physics , University of Wisconsin-Madison , 1150 University Avenue , Madison , Wisconsin 53706 , USA
| | - Angel Rubio
- Max Planck Institute for the Structure and Dynamics of Matter , Hamburg , Germany.,Nano-Bio Spectroscopy Group and ETSF , Universidad del Pais Vasco CFM CSIC-UPV/EHU-MPC & DIPC , 20018 San Sebastian , Spain
| | - Kristian S Thygesen
- Center for Atomic-scale Materials Design , Department of Physics , Technical University of Denmark , 2800 Kgs. Lyngby , Denmark . ;
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99910
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Abstract
L-cysteine (L-Cys) detection is of great importance because of its crucial roles in physiological and clinical diagnoses. In this study, a glucose/O2 biofuel cell (BFC) was assembled by using flavin adenine dinucleotide-dependent glucose dehydrogenase (FAD-GDH)-based bioanode and laccase-based biocathode. Interestingly, the open circuit potential (OCP) of the BFC could be inhibited by Cu(2+) and subsequently activated by L-Cys, by which a BFC-based self-powered sensing platform for the detection of L-Cys was proposed. The FAD-GDH activity can be inhibited by Cu(2+) and, in turn, subsequent reversible activation by L-Cys because of the binding preference of L-Cys toward Cu(2+) by forming the Cu-S bond. The preferential interaction between L-Cys and Cu(2+) facilitated Cu(2+) to remove from the surface of the bioanode, and thus, the OCP of the system could be turned on. Under optimized conditions, the OCP of the BFC was systematically increased upon the addition of the L-Cys. The OCP increment (ΔOCP) was linear with the concentration of L-Cys within 20 nM to 3 μM. The proposed sensor exhibited lower detection limit of 10 nM L-Cys (S/N = 3), which is significantly lower than those values for other methods reported so far. Other amino acids and glutathione did not affect L-Cys detection. Therefore, this developed approach is sensitive, facile, cost-effective, and environmental-friendly, and could be very promising for the reliable clinically detecting of L-Cys. This work would trigger the interest of developing BFCs based self-powered sensors for practical applications.
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Affiliation(s)
| | - Shuqin Fan
- ‡University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
| | | | - Aihua Liu
- ‡University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
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99911
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Jana S, Das S, Ghosh C, Maity A, Pradhan M. Halloysite nanotubes capturing isotope selective atmospheric CO2. Sci Rep 2015; 5:8711. [PMID: 25736700 DOI: 10.1038/srep08711] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Accepted: 01/30/2015] [Indexed: 11/08/2022] Open
Abstract
With the aim to capture and subsequent selective trapping of CO2, a nanocomposite has been developed through selective modification of the outer surface of the halloysite nanotubes (HNTs) with an organosilane to make the nanocomposite a novel solid-phase adsorbent to adsorb CO2 from the atmosphere at standard ambient temperature and pressure. The preferential adsorption of three major abundant isotopes of CO2 (12C16O2, 13C16O2, and 12C16O18O) from the ambient air by amine functionalized HNTs has been explored using an optical cavity-enhanced integrated cavity output spectroscopy. CO2 adsorption/desorption cycling measurements demonstrate that the adsorbent can be regenerated at relatively low temperature and thus, recycled repeatedly to capture atmospheric CO2. The amine grafted halloysite shows excellent stability even in oxidative environments and has high efficacy of CO2 capture, introducing a new route to the adsorption of isotope selective atmospheric CO2.
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99912
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Zhao Y, Kuai L, Liu Y, Wang P, Arandiyan H, Cao S, Zhang J, Li F, Wang Q, Geng B, Sun H. Well-constructed single-layer molybdenum disulfide nanorose cross-linked by three dimensional-reduced graphene oxide network for superior water splitting and lithium storage property. Sci Rep 2015; 5:8722. [PMID: 25735416 DOI: 10.1038/srep08722] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Accepted: 01/30/2015] [Indexed: 11/08/2022] Open
Abstract
A facile one-step solution reaction route for growth of novel MoS2 nanorose cross-linked by 3D rGO network, in which the MoS2 nanorose is constructed by single-layered or few-layered MoS2 nanosheets, is presented. Due to the 3D assembled hierarchical architecture of the ultrathin MoS2 nanosheets and the interconnection of 3D rGO network, as well as the synergetic effects of MoS2 and rGO, the as-prepared MoS2-NR/rGO nanohybrids delivered high specific capacity, excellent cycling and good rate performance when evaluated as an anode material for lithium-ion batteries. Moreover, the nanohybrids also show excellent hydrogen-evolution catalytic activity and durability in an acidic medium, which is superior to MoS2 nanorose and their nanoparticles counterparts.
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99913
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Sanchez D, Jacobs D, Gregory K, Huang J, Hu Y, Vidic R, Yun M. Changes in Carbon Electrode Morphology Affect Microbial Fuel Cell Performance with Shewanella oneidensis MR-1. Energies 2015; 8:1817-29. [DOI: 10.3390/en8031817] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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99914
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99915
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Zhang D, Zhu J, Zhang N, Liu T, Chen L, Liu X, Ma R, Zhang H, Qiu G. Controllable fabrication and magnetic properties of double-shell cobalt oxides hollow particles. Sci Rep 2015; 5:8737. [PMID: 25736824 DOI: 10.1038/srep08737] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Accepted: 01/23/2015] [Indexed: 11/08/2022] Open
Abstract
Double-shell cobalt monoxide (CoO) hollow particles were successfully synthesized by a facile and effective one-pot solution-based synthetic route. The inner architecture and outer structure of the double-shell CoO hollow particles could be readily created through controlling experimental parameters. A possible formation mechanism was proposed based on the experimental results. The current synthetic strategy has good prospects for the future production of other transition-metal oxides particles with hollow interior. Furthermore, double-shell cobalt oxide (Co3O4) hollow particles could also be obtained through calcinating corresponding CoO hollow particles. The magnetic measurements revealed double-shell CoO and Co3O4 hollow particles exhibit ferromagnetic and antiferromagnetic behaviour, respectively.
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99916
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Burke MS, Kast MG, Trotochaud L, Smith AM, Boettcher SW. Cobalt-iron (oxy)hydroxide oxygen evolution electrocatalysts: the role of structure and composition on activity, stability, and mechanism. J Am Chem Soc 2015; 137:3638-48. [PMID: 25700234 DOI: 10.1021/jacs.5b00281] [Citation(s) in RCA: 764] [Impact Index Per Article: 84.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Cobalt oxides and (oxy)hydroxides have been widely studied as electrocatalysts for the oxygen evolution reaction (OER). For related Ni-based materials, the addition of Fe dramatically enhances OER activity. The role of Fe in Co-based materials is not well-documented. We show that the intrinsic OER activity of Co(1-x)Fe(x)(OOH) is ∼100-fold higher for x ≈ 0.6-0.7 than for x = 0 on a per-metal turnover frequency basis. Fe-free CoOOH absorbs Fe from electrolyte impurities if the electrolyte is not rigorously purified. Fe incorporation and increased activity correlate with an anodic shift in the nominally Co(2+/3+) redox wave, indicating strong electronic interactions between the two elements and likely substitutional doping of Fe for Co. In situ electrical measurements show that Co(1-x)Fe(x)(OOH) is conductive under OER conditions (∼0.7-4 mS cm(-1) at ∼300 mV overpotential), but that FeOOH is an insulator with measurable conductivity (2.2 × 10(-2) mS cm(-1)) only at high overpotentials >400 mV. The apparent OER activity of FeOOH is thus limited by low conductivity. Microbalance measurements show that films with x ≥ 0.54 (i.e., Fe-rich) dissolve in 1 M KOH electrolyte under OER conditions. For x < 0.54, the films appear chemically stable, but the OER activity decreases by 16-62% over 2 h, likely due to conversion into denser, oxide-like phases. We thus hypothesize that Fe is the most-active site in the catalyst, while CoOOH primarily provides a conductive, high-surface area, chemically stabilizing host. These results are important as Fe-containing Co- and Ni-(oxy)hydroxides are the fastest OER catalysts known.
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Affiliation(s)
- Michaela S Burke
- †Department of Chemistry and Biochemistry and ‡Center for Sustainable Materials Chemistry, University of Oregon Eugene, Oregon 97403, United States
| | - Matthew G Kast
- †Department of Chemistry and Biochemistry and ‡Center for Sustainable Materials Chemistry, University of Oregon Eugene, Oregon 97403, United States
| | - Lena Trotochaud
- †Department of Chemistry and Biochemistry and ‡Center for Sustainable Materials Chemistry, University of Oregon Eugene, Oregon 97403, United States
| | - Adam M Smith
- †Department of Chemistry and Biochemistry and ‡Center for Sustainable Materials Chemistry, University of Oregon Eugene, Oregon 97403, United States
| | - Shannon W Boettcher
- †Department of Chemistry and Biochemistry and ‡Center for Sustainable Materials Chemistry, University of Oregon Eugene, Oregon 97403, United States
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99917
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Liu X, Li L, Zhou W, Zhou Y, Niu W, Chen S. High-Performance Electrocatalysts for Oxygen Reduction Based on Nitrogen-Doped Porous Carbon from Hydrothermal Treatment of Glucose and Dicyandiamide. ChemElectroChem 2015. [DOI: 10.1002/celc.201500002] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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99918
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Murray DJ, Patterson DD, Payamyar P, Bhola R, Song W, Lackinger M, Schlüter AD, King BT. Large Area Synthesis of a Nanoporous Two-Dimensional Polymer at the Air/Water Interface. J Am Chem Soc 2015; 137:3450-3. [DOI: 10.1021/ja512018j] [Citation(s) in RCA: 180] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Daniel J. Murray
- Department
of Chemistry, University of Nevada, Reno, Nevada 89557-0216, United States
| | - Dustin D. Patterson
- Department
of Chemistry, University of Nevada, Reno, Nevada 89557-0216, United States
| | - Payam Payamyar
- Laboratory of Polymer Chemistry, Institute of Polymers, Department of Materials, ETH Zürich, Vladimir-Prelog-Weg 5, CH-8093 Zürich, Switzerland
| | - Radha Bhola
- Department
of Chemistry, University of Nevada, Reno, Nevada 89557-0216, United States
| | - Wentao Song
- Department of Physics, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany
- Deutsches Museum, Museumsinsel 1, 80538 Munich, Germany
| | - Markus Lackinger
- Department of Physics, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany
- Deutsches Museum, Museumsinsel 1, 80538 Munich, Germany
| | - A. Dieter Schlüter
- Laboratory of Polymer Chemistry, Institute of Polymers, Department of Materials, ETH Zürich, Vladimir-Prelog-Weg 5, CH-8093 Zürich, Switzerland
| | - Benjamin T. King
- Department
of Chemistry, University of Nevada, Reno, Nevada 89557-0216, United States
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99919
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Cicco SR, Vona D, De Giglio E, Cometa S, Mattioli-Belmonte M, Palumbo F, Ragni R, Farinola GM. Chemically Modified Diatoms Biosilica for Bone Cell Growth with Combined Drug-Delivery and Antioxidant Properties. Chempluschem 2015; 80:1104-1112. [DOI: 10.1002/cplu.201402398] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2014] [Revised: 02/12/2015] [Indexed: 11/10/2022]
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99920
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Mykhailiv O, Imierska M, Petelczyc M, Echegoyen L, Plonska-Brzezinska ME. Chemical versus electrochemical synthesis of carbon nano-onion/polypyrrole composites for supercapacitor electrodes. Chemistry 2015; 21:5783-93. [PMID: 25736714 DOI: 10.1002/chem.201406126] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Indexed: 11/09/2022]
Abstract
The development of high-surface-area carbon electrodes with a defined pore size distribution and the incorporation of pseudo-active materials to optimize the overall capacitance and conductivity without destroying the stability are at present important research areas. Composite electrodes of carbon nano-onions (CNOs) and polypyrrole (Ppy) were fabricated to improve the specific capacitance of a supercapacitor. The carbon nanostructures were uniformly coated with Ppy by chemical polymerization or by electrochemical potentiostatic deposition to form homogenous composites or bilayers. The materials were characterized by transmission- and scanning electron microscopy, differential thermogravimetric analyses, FTIR spectroscopy, piezoelectric microgravimetry, and cyclic voltammetry. The composites show higher mechanical and electrochemical stabilities, with high specific capacitances of up to about 800 F g(-1) for the CNOs/SDS/Ppy composites (chemical synthesis) and about 1300 F g(-1) for the CNOs/Ppy bilayer (electrochemical deposition).
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Affiliation(s)
- Olena Mykhailiv
- Institute of Chemistry, University of Bialystok, Hurtowa 1, 15-399 Bialystok (Poland), Fax: (+48-85) 747-0113
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99921
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Huang GF, Wu XB, Bai LP, Liu K, Jiang LJ, Long MN, Chen QX. Improved O2-tolerance in variants of a H2-evolving [NiFe]-hydrogenase from Klebsiella oxytoca HP1. FEBS Lett 2015; 589:910-8. [PMID: 25747389 DOI: 10.1016/j.febslet.2015.02.027] [Citation(s) in RCA: 6] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 02/14/2015] [Accepted: 02/23/2015] [Indexed: 12/29/2022]
Abstract
In this study, we investigated the mechanism of O2 tolerance of Klebsiella oxytoca HP1 H2-evolving hydrogenase 3 (KHyd3) by mutational analysis and three-dimensional structure modeling. Results revealed that certain surface amino acid residues of KHyd3 large subunit, in particular those at the outer entrance of the gas channel, have a visible effect on its oxygen tolerance. Additionally, solution pH, immobilization and O2 partial pressure also affect KHyd3 O2-tolerance to some extent. We propose that the extent of KHyd3 O2-tolerance is determined by a balance between the rate of O2 access to the active center through gas channels and the deoxidation rate of the oxidized active center. Based on our findings, two higher O2-tolerant KHyd3 mutations G300E and G300M were developed.
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Affiliation(s)
- Gang-Feng Huang
- State Key Laboratory of Cellular Stress Biology and Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361102, China
| | - Xiao-Bing Wu
- State Key Laboratory of Cellular Stress Biology and Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361102, China.
| | - Li-Ping Bai
- State Key Laboratory of Cellular Stress Biology and Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361102, China
| | - Ke Liu
- State Key Laboratory of Cellular Stress Biology and Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361102, China
| | - Li-Jing Jiang
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China
| | - Min-Nan Long
- School of Energy Research, Xiamen University, Xiamen 361102, China
| | - Qing-Xi Chen
- State Key Laboratory of Cellular Stress Biology and Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361102, China.
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99922
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Hu J, Ma J, Zhu Q, Zhang Z, Wu C, Han B. Transformation of Atmospheric CO2Catalyzed by Protic Ionic Liquids: Efficient Synthesis of 2-Oxazolidinones. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201411969] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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99923
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Coates CS, Milikisiyants S, Chatterjee R, Whittaker MM, Whittaker JW, Lakshmi KV. Two-Dimensional HYSCORE Spectroscopy of Superoxidized Manganese Catalase: A Model for the Oxygen-Evolving Complex of Photosystem II. J Phys Chem B 2015; 119:4905-16. [DOI: 10.1021/acs.jpcb.5b01602] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Christopher S. Coates
- Department
of Chemistry and Chemical Biology and The Baruch ’60 Center
for Biochemical Solar Energy Research, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Sergey Milikisiyants
- Department
of Chemistry and Chemical Biology and The Baruch ’60 Center
for Biochemical Solar Energy Research, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Ruchira Chatterjee
- Department
of Chemistry and Chemical Biology and The Baruch ’60 Center
for Biochemical Solar Energy Research, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Mei M. Whittaker
- Division of Environmental and Biomolecular Systems, Institute of Environmental Health, Oregon Health & Science University, Portland, Oregon 97239-3098, United States
| | - James W. Whittaker
- Division of Environmental and Biomolecular Systems, Institute of Environmental Health, Oregon Health & Science University, Portland, Oregon 97239-3098, United States
| | - K. V. Lakshmi
- Department
of Chemistry and Chemical Biology and The Baruch ’60 Center
for Biochemical Solar Energy Research, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
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99924
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Lee J, Kim JH, Moon B, Kim HG, Kim M, Shin J, Hwang H, Cho K. Two-Dimensionally Extended π-Conjugation of Donor–Acceptor Copolymers via Oligothienyl Side Chains for Efficient Polymer Solar Cells. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00056] [Citation(s) in RCA: 62] [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: 01/26/2023]
Affiliation(s)
- Jaewon Lee
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, 790-784, Korea
| | - Joo-Hyun Kim
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, 790-784, Korea
| | - Byungho Moon
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, 790-784, Korea
| | - Heung Gyu Kim
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, 790-784, Korea
| | - Min Kim
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, 790-784, Korea
| | - Jisoo Shin
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, 790-784, Korea
| | - Hyeongjin Hwang
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, 790-784, Korea
| | - Kilwon Cho
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, 790-784, Korea
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99925
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99926
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Priebe JB, Radnik J, Lennox AJJ, Pohl MM, Karnahl M, Hollmann D, Grabow K, Bentrup U, Junge H, Beller M, Brückner A. Solar Hydrogen Production by Plasmonic Au–TiO2 Catalysts: Impact of Synthesis Protocol and TiO2 Phase on Charge Transfer Efficiency and H2 Evolution Rates. ACS Catal 2015. [DOI: 10.1021/cs5018375] [Citation(s) in RCA: 172] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Jacqueline B. Priebe
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29a, 18059 Rostock, Germany
| | - Jörg Radnik
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29a, 18059 Rostock, Germany
| | - Alastair J. J. Lennox
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29a, 18059 Rostock, Germany
| | - Marga-Martina Pohl
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29a, 18059 Rostock, Germany
| | - Michael Karnahl
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29a, 18059 Rostock, Germany
| | - Dirk Hollmann
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29a, 18059 Rostock, Germany
| | - Kathleen Grabow
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29a, 18059 Rostock, Germany
| | - Ursula Bentrup
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29a, 18059 Rostock, Germany
| | - Henrik Junge
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29a, 18059 Rostock, Germany
| | - Matthias Beller
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29a, 18059 Rostock, Germany
| | - Angelika Brückner
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29a, 18059 Rostock, Germany
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99927
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Zhang Y, Feng X, Li H, Chen Y, Zhao J, Wang S, Wang L, Wang B. Photoinduced Postsynthetic Polymerization of a Metal-Organic Framework toward a Flexible Stand-Alone Membrane. Angew Chem Int Ed Engl 2015; 54:4259-63. [DOI: 10.1002/anie.201500207] [Citation(s) in RCA: 193] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Revised: 02/04/2015] [Indexed: 11/07/2022]
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99928
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Hu J, Ma J, Zhu Q, Zhang Z, Wu C, Han B. Transformation of atmospheric CO2 catalyzed by protic ionic liquids: efficient synthesis of 2-oxazolidinones. Angew Chem Int Ed Engl 2015; 54:5399-403. [PMID: 25735887 DOI: 10.1002/anie.201411969] [Citation(s) in RCA: 155] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Revised: 02/08/2015] [Indexed: 11/06/2022]
Abstract
Protic ionic liquids (PILs), such as 1,8-diazabicyclo[5.4.0]-7-undecenium 2-methylimidazolide [DBUH][MIm], can catalyze the reaction of atmospheric CO2 with a broad range of propargylic amines to form the corresponding 2-oxazolidinones. The products are formed in high yields under mild, metal-free conditions. The cheaper and greener PILs can be easily recycled and reused at least five times without a decrease in the catalytic activity and selectivity. A reaction mechanism was proposed on the basis of a detailed DFT study which indicates that both the cation and anion of the PIL play key synergistic roles in accelerating the reaction.
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Affiliation(s)
- Jiayin Hu
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Colloid and Interface and Thermodynamics Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)
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99929
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Ahn SH, Liu Y, Moffat TP. Ultrathin Platinum Films for Methanol and Formic Acid Oxidation: Activity as a Function of Film Thickness and Coverage. ACS Catal 2015. [DOI: 10.1021/cs501228j] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Sang Hyun Ahn
- Materials Science and Engineering
Division, Material Measurement Laboratory, National Institute of Standard and Technology (NIST), 100 Bureau Drive, Gaithersburg, Maryland 20899, United States
| | - Yihua Liu
- Materials Science and Engineering
Division, Material Measurement Laboratory, National Institute of Standard and Technology (NIST), 100 Bureau Drive, Gaithersburg, Maryland 20899, United States
| | - Thomas P. Moffat
- Materials Science and Engineering
Division, Material Measurement Laboratory, National Institute of Standard and Technology (NIST), 100 Bureau Drive, Gaithersburg, Maryland 20899, United States
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99930
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Low JZ, Neo WT, Ye Q, Ong WJ, Wong IHK, Lin TT, Xu J. Low band-gap diketopyrrolopyrrole-containing polymers for near infrared electrochromic and photovoltaic applications. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/pola.27564] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jonathan Zhaozhi Low
- lnstitute of Materials Research and Engineering, A*STAR; 3 Research Link Singapore 117602 Singapore
| | - Wei Teng Neo
- lnstitute of Materials Research and Engineering, A*STAR; 3 Research Link Singapore 117602 Singapore
- NUS Graduate School for Integrative Sciences and Engineering; National University of Singapore; 28 Medical Drive Singapore 117456 Singapore
| | - Qun Ye
- lnstitute of Materials Research and Engineering, A*STAR; 3 Research Link Singapore 117602 Singapore
| | - Wen Jie Ong
- lnstitute of Materials Research and Engineering, A*STAR; 3 Research Link Singapore 117602 Singapore
| | - Ivy Hoi Ka Wong
- lnstitute of Materials Research and Engineering, A*STAR; 3 Research Link Singapore 117602 Singapore
| | - Ting Ting Lin
- lnstitute of Materials Research and Engineering, A*STAR; 3 Research Link Singapore 117602 Singapore
| | - Jianwei Xu
- lnstitute of Materials Research and Engineering, A*STAR; 3 Research Link Singapore 117602 Singapore
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
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99931
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Infantes-molina A, Pawelec B, Fierro JLG, Loricera CV, Jiménez-lópez A, Rodríguez-castellón E. Effect of Ir and Pt Addition on the HDO Performance of RuS2/SBA-15 Sulfide Catalysts. Top Catal 2015; 58:247-57. [DOI: 10.1007/s11244-015-0366-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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99932
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Xu Z, Yang L, Xu C. Pt@UiO-66 Heterostructures for Highly Selective Detection of Hydrogen Peroxide with an Extended Linear Range. Anal Chem 2015; 87:3438-44. [DOI: 10.1021/ac5047278] [Citation(s) in RCA: 151] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Zhaodong Xu
- State Key Laboratory of Applied Organic
Chemistry, Key Laboratory of Special Function Materials and Structure
Design Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Lizi Yang
- State Key Laboratory of Applied Organic
Chemistry, Key Laboratory of Special Function Materials and Structure
Design Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Cailing Xu
- State Key Laboratory of Applied Organic
Chemistry, Key Laboratory of Special Function Materials and Structure
Design Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
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99933
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Téllez H, Druce J, Hong JE, Ishihara T, Kilner JA. Accurate and precise measurement of oxygen isotopic fractions and diffusion profiles by selective attenuation of secondary ions (SASI). Anal Chem 2015; 87:2907-15. [PMID: 25647357 DOI: 10.1021/ac504409x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The accuracy and precision of isotopic analysis in Time-of-Flight secondary ion mass spectrometry (ToF-SIMS) relies on the appropriate reduction of the dead-time and detector saturation effects, especially when analyzing species with high ion yields or present in high concentrations. Conventional approaches to avoid these problems are based on Poisson dead-time correction and/or an overall decrease of the total secondary ion intensity by reducing the target current. This ultimately leads to poor detection limits for the minor isotopes and high uncertainties of the measured isotopic ratios. An alternative strategy consists of the attenuation of those specific secondary ions that saturate the detector, providing an effective extension of the linear dynamic range. In this work, the selective attenuation of secondary ion signals (SASI) approach is applied to the study of oxygen transport properties in electroceramic materials by isotopic labeling with stable (18)O tracer and ToF-SIMS depth profiling. The better analytical performance in terms of accuracy and precision allowed a more reliable determination of the oxygen surface exchange and diffusion coefficients while maintaining good mass resolution and limits of detection for other minor secondary ion species. This improvement is especially relevant to understand the ionic transport mechanisms and properties of solid materials, such as the parallel diffusion pathways (e.g., oxygen diffusion through bulk, grain boundary, or dislocations) in electroceramic materials with relevant applications in energy storage and conversion devices.
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Affiliation(s)
- Helena Téllez
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University , 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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99934
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Dymshits A, Henning A, Segev G, Rosenwaks Y, Etgar L. The electronic structure of metal oxide/organo metal halide perovskite junctions in perovskite based solar cells. Sci Rep 2015; 5:8704. [PMID: 25731963 DOI: 10.1038/srep08704] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Accepted: 02/02/2015] [Indexed: 11/08/2022] Open
Abstract
Cross-sections of a hole-conductor-free CH3NH3PbI3 perovskite solar cell were characterized with Kelvin probe force microscopy. A depletion region width of about 45 nm was determined from the measured potential profiles at the interface between CH3NH3PbI3 and nanocrystalline TiO2, whereas a negligible depletion was measured at the CH3NH3PbI3/Al2O3 interface. A complete solar cell can be realized with the CH3NH3PbI3 that functions both as light harvester and hole conductor in combination with a metal oxide. The band diagrams were estimated from the measured potential profile at the interfaces, and are critical findings for a better understanding and further improvement of perovskite based solar cells.
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99935
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Wang G, Xu T, Wen S, Pan M. Structure-dependent electrocatalytic activity of La1-x Sr x MnO3 for oxygen reduction reaction. Sci China Chem 2015; 58:871-8. [DOI: 10.1007/s11426-015-5326-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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99936
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99937
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Malvankar NS, Vargas M, Nevin K, Tremblay PL, Evans-Lutterodt K, Nykypanchuk D, Martz E, Tuominen MT, Lovley DR. Structural basis for metallic-like conductivity in microbial nanowires. mBio 2015; 6:e00084. [PMID: 25736881 DOI: 10.1128/mBio.00084-15] [Citation(s) in RCA: 113] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Direct measurement of multiple physical properties of Geobacter sulfurreducens pili have demonstrated that they possess metallic-like conductivity, but several studies have suggested that metallic-like conductivity is unlikely based on the structures of the G. sulfurreducens pilus predicted from homology models. In order to further evaluate this discrepancy, pili were examined with synchrotron X-ray microdiffraction and rocking-curve X-ray diffraction. Both techniques revealed a periodic 3.2-Å spacing in conductive, wild-type G. sulfurreducens pili that was missing in the nonconductive pili of strain Aro5, which lack key aromatic acids required for conductivity. The intensity of the 3.2-Å peak increased 100-fold when the pH was shifted from 10.5 to 2, corresponding with a previously reported 100-fold increase in pilus conductivity with this pH change. These results suggest a clear structure-function correlation for metallic-like conductivity that can be attributed to overlapping π-orbitals of aromatic amino acids. A homology model of the G. sulfurreducens pilus was constructed with a Pseudomonas aeruginosa pilus model as a template as an alternative to previous models, which were based on a Neisseria gonorrhoeae pilus structure. This alternative model predicted that aromatic amino acids in G. sulfurreducens pili are packed within 3 to 4 Å, consistent with the experimental results. Thus, the predictions of homology modeling are highly sensitive to assumptions inherent in the model construction. The experimental results reported here further support the concept that the pili of G. sulfurreducens represent a novel class of electronically functional proteins in which aromatic amino acids promote long-distance electron transport. The mechanism for long-range electron transport along the conductive pili of Geobacter sulfurreducens is of interest because these “microbial nanowires” are important in biogeochemical cycling as well as applications in bioenergy and bioelectronics. Although proteins are typically insulators, G. sulfurreducens pilus proteins possess metallic-like conductivity. The studies reported here provide important structural insights into the mechanism of the metallic-like conductivity of G. sulfurreducens pili. This information is expected to be useful in the design of novel bioelectronic materials.
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99938
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Zhang Y, Feng X, Li H, Chen Y, Zhao J, Wang S, Wang L, Wang B. Photoinduced Postsynthetic Polymerization of a Metal-Organic Framework toward a Flexible Stand-Alone Membrane. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201500207] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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99939
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Peña Carrodeguas L, González-Fabra J, Castro-Gómez F, Bo C, Kleij AW. AlIII-Catalysed Formation of Poly(limonene)carbonate: DFT Analysis of the Origin of Stereoregularity. Chemistry 2015; 21:6115-22. [DOI: 10.1002/chem.201406334] [Citation(s) in RCA: 97] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Indexed: 11/06/2022]
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99940
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Cho A, Takagaki A, Kikuchi R, Ted Oyama S. Active Sites in Ni2P/USY Catalysts for the Hydrodeoxygenation of 2-Methyltetrahydrofuran. Top Catal 2015; 58:219-31. [DOI: 10.1007/s11244-015-0363-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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99941
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Pan J, Jia S, Li G, Hu Y. Organic building block based microporous network SNW-1 coating fabricated by multilayer interbridging strategy for efficient enrichment of trace volatiles. Anal Chem 2015; 87:3373-81. [PMID: 25707527 DOI: 10.1021/ac504594d] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Microporous organic polymers (MOPs) are an emerging class of functional porous materials for diverse potential applications. Typically, tailored microporous structures of MOPs are generated by linkages of organic polymerizable monomer building blocks, providing high permanent porosity and excellent stability. Herein, we reported the first example of the application of organic building block based MOPs (OBB-MOPs) as efficient enrichment media for sample preparation. A novel multilayer interbridging strategy was proposed to fabricate OBB-MOP coatings, and hereby SNW-1 (a kind of OBB-MOPs) was coated on silica substrate with well-controlled thickness. Strong covalent bonds throughout the network and interlayer bridging improved the durability of the coating significantly. Outstanding chemical stability was observed in diverse solvents as well as solutions with a wide range of pH or high ionic strength and even under extremely harsh conditions like boiling water. The SNW-1 coating possessed a microporous network structure constructed of conjugated and nitrogen-rich building blocks. Thus, the coating exhibited a superior enrichment performance of polycyclic aromatic hydrocarbons and volatile fatty acids (VFAs) over commercial coatings based on interactions including π-π affinity and acid-base interaction. For further application, this coating was combined with gas chromatography/mass spectrometry for the noninvasive analysis of VFAs from tea leaf and tobacco shred samples. The low detection limits of 0.014-0.026 μg/L were achieved with the relative standard deviations (RSDs) between 4.3 and 9.0%. Consequently, trace original VFAs from the samples were detected. Good recoveries were obtained in the range of 90-129% and 77-118% with the corresponding RSDs (n = 3) of 2.6-9.3% and 1.9-10%, respectively.
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Affiliation(s)
- Jialiang Pan
- School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, 510275 Guangdong, China
| | - Shu Jia
- School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, 510275 Guangdong, China
| | - Gongke Li
- School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, 510275 Guangdong, China
| | - Yuling Hu
- School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, 510275 Guangdong, China
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99942
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Kashima H, Regan JM. Facultative nitrate reduction by electrode-respiring Geobacter metallireducens biofilms as a competitive reaction to electrode reduction in a bioelectrochemical system. Environ Sci Technol 2015; 49:3195-3202. [PMID: 25622928 DOI: 10.1021/es504882f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Alternative metabolic options of exoelectrogenic biofilms in bioelectrochemical systems (BESs) are important not only to explain the fundamental ecology and performance of these systems but also to develop reliable integrated nutrient removal strategies in BESs, which potentially involve substrates or intermediates that support/induce those alternative metabolisms. This research focused on dissimilatory nitrate reduction as an alternative metabolism to dissimilatory anode reduction. Using the exoelectrogenic nitrate reducer Geobacter metallireducens, the critical conditions controlling those alternative metabolisms were investigated in two-chamber, potentiostatically controlled BESs at various anode potentials and biofilm thicknesses and challenged over a range of nitrate concentrations. Results showed that anode-reducing biofilms facultatively reduced nitrate at all tested anode potentials (-150 to +900 mV vs Standard Hydrogen Electrode) with a rapid metabolic shift. The critical nitrate concentration that triggered a significant decrease in BES performance was a function of anode biofilm thickness but not anode potential. This indicates that these alternative metabolisms were controlled by the availability of nitrate, which is a function of nitrate concentration in bulk solution and its diffusion into an anode-reducing biofilm. Coulombic recovery decreased as a function of nitrate dose due to electron-acceptor substrate competition, and nitrate-induced suspended biomass growth decreased the effluent quality.
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Affiliation(s)
- Hiroyuki Kashima
- Department of Civil and Environmental Engineering, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
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99943
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Meng J, Yuan N, Liu X, Yao C, Liang Q, Zhou D, Meng F, Meng J. Synergistic Effects of Intrinsic Cation Disorder and Electron-Deficient Substitution on Ion and Electron Conductivity in La1–xSrxCo0.5Mn0.5O3−δ (x = 0, 0.5, and 0.75). Inorg Chem 2015; 54:2820-9. [DOI: 10.1021/ic502989c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [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)
- Junling Meng
- State Key
Laboratory of Rare Earth Resource Utilization, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Na Yuan
- State Key
Laboratory of Rare Earth Resource Utilization, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- School of Chemistry and Life Science, Changchun University of Technology, Changchun 130012, P. R. China
| | - Xiaojuan Liu
- State Key
Laboratory of Rare Earth Resource Utilization, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Chuangang Yao
- State Key
Laboratory of Rare Earth Resource Utilization, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Qingshuang Liang
- State Key
Laboratory of Rare Earth Resource Utilization, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Defeng Zhou
- School of Chemistry and Life Science, Changchun University of Technology, Changchun 130012, P. R. China
| | - Fanzhi Meng
- State Key
Laboratory of Rare Earth Resource Utilization, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Jian Meng
- State Key
Laboratory of Rare Earth Resource Utilization, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
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99944
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Manbeck GF, Muckerman JT, Szalda DJ, Himeda Y, Fujita E. Push or Pull? Proton Responsive Ligand Effects in Rhenium Tricarbonyl CO2 Reduction Catalysts. J Phys Chem B 2015; 119:7457-66. [DOI: 10.1021/jp511131x] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Gerald F. Manbeck
- Department
of Chemistry, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| | - James T. Muckerman
- Department
of Chemistry, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| | - David J. Szalda
- Department
of Chemistry, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
- Department
of Natural Science, Baruch College, CUNY, New York, New York 10010, United States
| | - Yuichiro Himeda
- National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5-1, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
- Japan Science and Technology Agency, ACT-C, 4-1-8, Honcho, Kawaguchi, Saitama, 332-0012, Japan
| | - Etsuko Fujita
- Department
of Chemistry, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
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99945
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Huang N, Chen X, Krishna R, Jiang D. Two-dimensional covalent organic frameworks for carbon dioxide capture through channel-wall functionalization. Angew Chem Int Ed Engl 2015; 54:2986-90. [PMID: 25613010 PMCID: PMC4471552 DOI: 10.1002/anie.201411262] [Citation(s) in RCA: 375] [Impact Index Per Article: 41.7] [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: 11/20/2014] [Revised: 12/26/2014] [Indexed: 11/07/2022]
Abstract
Ordered open channels found in two-dimensional covalent organic frameworks (2D COFs) could enable them to adsorb carbon dioxide. However, the frameworks' dense layer architecture results in low porosity that has thus far restricted their potential for carbon dioxide adsorption. Here we report a strategy for converting a conventional 2D COF into an outstanding platform for carbon dioxide capture through channel-wall functionalization. The dense layer structure enables the dense integration of functional groups on the channel walls, creating a new version of COFs with high capacity, reusability, selectivity, and separation productivity for flue gas. These results suggest that channel-wall functional engineering could be a facile and powerful strategy to develop 2D COFs for high-performance gas storage and separation.
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Affiliation(s)
- Ning Huang
- Department of Materials Molecular Science, Institute for Molecular Science, National Institutes of Natural Sciences5-1 Higashiyama, Myodaiji, Okazaki 444-8787 (Japan)
| | - Xiong Chen
- Department of Materials Molecular Science, Institute for Molecular Science, National Institutes of Natural Sciences5-1 Higashiyama, Myodaiji, Okazaki 444-8787 (Japan)
| | - Rajamani Krishna
- Van't Hoff Institute for Molecular Sciences, University of AmsterdamScience Park 904, 1098 XH Amsterdam (The Netherlands)
| | - Donglin Jiang
- Department of Materials Molecular Science, Institute for Molecular Science, National Institutes of Natural Sciences5-1 Higashiyama, Myodaiji, Okazaki 444-8787 (Japan)
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99946
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Abstract
Green plant photosystem II (PSII) and light-harvesting complex II (LHCII) in the stacked grana regions of thylakoid membranes can self-organize into various PSII-LHCII supercomplexes with crystalline or fluid-like supramolecular structures to adjust themselves with external stimuli such as high/low light and temperatures, rendering tunable solar light absorption spectrum and photosynthesis efficiencies. However, the mechanisms controlling the PSII-LHCII supercomplex organizations remain elusive. In this work, we constructed a coarse-grained (CG) model of the thylakoid membrane including lipid molecules and a PSII-LHCII supercomplex considering association/dissociation of moderately bound-LHCIIs. The CG interaction between CG beads were constructed based on electron microscope (EM) experimental results, and we were able to simulate the PSII-LHCII supramolecular organization of a 500 × 500 nm(2) thylakoid membrane, which is compatible with experiments. Our CGMD simulations can successfully reproduce order structures of PSII-LHCII supercomplexes under various protein packing fractions, free-LHCII:PSII ratios, and temperatures, thereby providing insights into mechanisms leading to PSII-LHCII supercomplex organizations in photosynthetic membranes.
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Affiliation(s)
- Cheng-Kuang Lee
- Research Center for Applied Sciences, Academia Sinica , Taipei 11529, Taiwan
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99947
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Yin H, Zhao S, Zhao K, Muqsit A, Tang H, Chang L, Zhao H, Gao Y, Tang Z. Ultrathin platinum nanowires grown on single-layered nickel hydroxide with high hydrogen evolution activity. Nat Commun 2015; 6:6430. [DOI: 10.1038/ncomms7430] [Citation(s) in RCA: 732] [Impact Index Per Article: 81.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2014] [Accepted: 01/28/2015] [Indexed: 12/23/2022] Open
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99948
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Lai YH, Park HS, Zhang JZ, Matthews PD, Wright DS, Reisner E. A Si photocathode protected and activated with a Ti and Ni composite film for solar hydrogen production. Chemistry 2015; 21:3919-23. [PMID: 25650832 PMCID: PMC4371644 DOI: 10.1002/chem.201406566] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [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: 12/19/2014] [Indexed: 11/12/2022]
Abstract
An efficient, stable and scalable hybrid photoelectrode for visible-light-driven H2 generation in an aqueous pH 9.2 electrolyte solution is reported. The photocathode consists of a p-type Si substrate layered with a Ti and Ni-containing composite film, which acts as both a protection and electrocatalyst layer on the Si substrate. The film is prepared by the simple drop casting of the molecular single-source precursor, [{Ti2(OEt)9(NiCl)}2] (TiNipre), onto the p-Si surface at room temperature, followed by cathodic in situ activation to form the catalytically active TiNi film (TiNicat). The p-Si|TiNicat photocathode exhibits prolonged hydrogen generation with a stable photocurrent of approximately -5 mA cm(-2) at 0 V vs. RHE in an aqueous pH 9.2 borate solution for several hours, and serves as a benchmark non-noble photocathode for solar H2 evolution that operates efficiently under neutral-alkaline conditions.
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Affiliation(s)
- Yi-Hsuan Lai
- Christian Doppler Laboratory for Sustainable SynGas Chemistry, Department of Chemistry, University of Cambridge, Cambridge CB2 1EW (UK) http://www-reisner.ch.cam.ac.uk/
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99949
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Meng L, Yu X, Niimi T, Nagasawa H, Kanezashi M, Yoshioka T, Tsuru T. Methylcyclohexane dehydrogenation for hydrogen production via a bimodal catalytic membrane reactor. AIChE J 2015. [DOI: 10.1002/aic.14764] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Lie Meng
- Dept. of Chemical Engineering; Graduate School of Engineering, Hiroshima University; 1-4-1 Kagami-yama Higashi-Hiroshima 739-8527 Japan
| | - Xin Yu
- Dept. of Chemical Engineering; Graduate School of Engineering, Hiroshima University; 1-4-1 Kagami-yama Higashi-Hiroshima 739-8527 Japan
| | - Takuya Niimi
- Dept. of Chemical Engineering; Graduate School of Engineering, Hiroshima University; 1-4-1 Kagami-yama Higashi-Hiroshima 739-8527 Japan
| | - Hiroki Nagasawa
- Dept. of Chemical Engineering; Graduate School of Engineering, Hiroshima University; 1-4-1 Kagami-yama Higashi-Hiroshima 739-8527 Japan
| | - Masakoto Kanezashi
- Dept. of Chemical Engineering; Graduate School of Engineering, Hiroshima University; 1-4-1 Kagami-yama Higashi-Hiroshima 739-8527 Japan
| | - Tomohisa Yoshioka
- Dept. of Chemical Engineering; Graduate School of Engineering, Hiroshima University; 1-4-1 Kagami-yama Higashi-Hiroshima 739-8527 Japan
| | - Toshinori Tsuru
- Dept. of Chemical Engineering; Graduate School of Engineering, Hiroshima University; 1-4-1 Kagami-yama Higashi-Hiroshima 739-8527 Japan
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99950
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Kim OH, Cho YH, Chung DY, Kim MJ, Yoo JM, Park JE, Choe H, Sung YE. Facile and gram-scale synthesis of metal-free catalysts: toward realistic applications for fuel cells. Sci Rep 2015; 5:8376. [PMID: 25728910 PMCID: PMC4345340 DOI: 10.1038/srep08376] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [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: 09/01/2014] [Accepted: 01/14/2015] [Indexed: 11/09/2022] Open
Abstract
Although numerous reports on nonprecious metal catalysts for replacing expensive Pt-based catalysts have been published, few of these studies have demonstrated their practical application in fuel cells. In this work, we report graphitic carbon nitride and carbon nanofiber hybrid materials synthesized by a facile and gram-scale method via liquid-based reactions, without the use of toxic materials or a high pressure-high temperature reactor, for use as fuel cell cathodes. The resulting materials exhibited remarkable methanol tolerance, selectivity, and stability even without a metal dopant. Furthermore, these completely metal-free catalysts exhibited outstanding performance as cathode materials in an actual fuel cell device: a membrane electrode assembly with both acidic and alkaline polymer electrolytes. The fabrication method and remarkable performance of the single cell produced in this study represent progressive steps toward the realistic application of metal-free cathode electrocatalysts in fuel cells.
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Affiliation(s)
- Ok-Hee Kim
- Department of Science, Republic of Korea Naval Academy, Jinhae-gu, Changwon 646-797, South Korea
| | - Yong-Hun Cho
- Department of Chemical Engineering, Kangwon National University, Samcheok 245-711, South Korea
| | - Dong Young Chung
- 1] Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 151-742, South Korea [2] School of Chemical and Biological Engineering, Seoul National University, Seoul 151-742, South Korea
| | - Min Jeong Kim
- 1] Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 151-742, South Korea [2] School of Chemical and Biological Engineering, Seoul National University, Seoul 151-742, South Korea
| | - Ji Mun Yoo
- 1] Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 151-742, South Korea [2] School of Chemical and Biological Engineering, Seoul National University, Seoul 151-742, South Korea
| | - Ji Eun Park
- 1] Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 151-742, South Korea [2] School of Chemical and Biological Engineering, Seoul National University, Seoul 151-742, South Korea
| | - Heeman Choe
- School of Advanced Materials Engineering, Kookmin University, Seoul 136-702, South Korea
| | - Yung-Eun Sung
- 1] Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 151-742, South Korea [2] School of Chemical and Biological Engineering, Seoul National University, Seoul 151-742, South Korea
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