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Mori T, Tong K, Yamamoto S, Chauhan S, Kobayashi T, Isaka N, Auchterlonie G, Wepf R, Suzuki A, Ito S, Ye F. Active Pt-Nanocoated Layer with Pt-O-Ce Bonds on a CeO x Nanowire Cathode Formed by Electron Beam Irradiation. ACS OMEGA 2022; 7:25822-25836. [PMID: 35910162 PMCID: PMC9330286 DOI: 10.1021/acsomega.2c03348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A Pt-nanocoated layer (thickness of approx. 10-20 nm) with Pt-O-Ce bonds was created through the water radiolysis reaction on a CeO x nanowire (NW), which was induced by electron beam irradiation to the mixed suspension of K2PtCl4 aqueous solution and the CeO x NW. In turn, when Pt-nanocoated CeO x NW/C (Pt/C ratio = 0.2) was used in the cathode layer of a membrane electrode assembly (MEA), both an improved fuel cell performance and stability were achieved. The fuel cell performance observed for the MEA using Pt-nanocoated CeO x NW/C with Pt-O-Ce bonds, which was prepared using the electron beam irradiation method, improved and maintained its performance (observed cell potential of approximately 0.8 V at 100 mW cm-2) from 30 to 140 h after the start of operation. In addition, the activation overpotential at 100 mA cm-2 (0.17 V) obtained for MEA using Pt-nanocoated CeO x NW/C was approximately half of the value at 100 mA cm-2 (0.35 V) of MEA using a standard Pt/C cathode. In contrast, the fuel cell performance (0.775 V at 100 mW cm-2 after 80 h of operation) of MEA using a nanosized Pt-loaded CeO x NW (Pt/C = 0.2), which was prepared using the conventional chemical reduction method, was lower than that of MEA using a Pt-nanocoated CeO x /C cathode and showed reduction after 80 h of operation. It is considered why the nanocoated layer having Pt-O-Ce bonds heterogeneously formed on the surface of the CeO x NW and the bare CeO2 surface consisting of Ce4+ cations would become unstable in an acidic atmosphere. Furthermore, when a conventional low-amount Pt/C cathode (Pt/C = 0.04) was used as the cathode layer of the MEA, its stable performance could not be measured after 80 h of operation as a result of flooding caused by a lowering of electrocatalytic activity on the Pt/C cathode in the MEA. In contrast, a low-amount Pt-nanocoated CeO x NW (Pt/C = 0.04) could maintain a low activation overpotential (0.22 V at 100 mA cm-2) of MEA at the same operation time. Our surface first-principles modeling indicates that the high quality and stable performance observed for the Pt-nanocoated CeO x NW cathode of MEA can be attributed to the formation of a homogeneous electric double layer on the sample. Since the MEA performance can be improved by examining a more effective method of electron beam irradiation to all surfaces of the sample, the present work result shows the usefulness of the electron beam irradiation method in preparing active surfaces. In addition, the quantum beam technology such as the electron beam irradiation method was shown to be useful for increasing both performance and stability of fuel cells.
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Affiliation(s)
- Toshiyuki Mori
- Center
for Green Research on Energy and Environmental Materials, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Ke Tong
- Center
for Green Research on Energy and Environmental Materials, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Japan
- Center
for High Pressure Science, State Key Laboratory of Metastable Materials
Science and Technology, Yanshan University, Qinhuangdao 066004, China
| | - Shunya Yamamoto
- Takasaki
Advanced Radiation Research Institute, National Institute for Quantum
and Radiological Science and Technology (QST), 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - Shipra Chauhan
- Center
for Green Research on Energy and Environmental Materials, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Tomohiro Kobayashi
- Neutron
Beam Technology Team, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Noriko Isaka
- Transmission
Electron Microscopy Station, NIMS, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
| | - Graeme Auchterlonie
- Centre
for Microscopy and Microanalysis, The University
of Queensland, Brisbane, Queensland 4072, Australia
| | - Roger Wepf
- Centre
for Microscopy and Microanalysis, The University
of Queensland, Brisbane, Queensland 4072, Australia
| | - Akira Suzuki
- Center
for Green Research on Energy and Environmental Materials, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Shigeharu Ito
- Department
of Creative Engineering, National Institute
of Technology Tsuruoka College, 104 Sawada, Inoka, Tsuruoka, Yamagata 997-8511, Japan
| | - Fei Ye
- Department
of Materials Science and Engineering, Southern
University of Science and Technology, No. 1088, Xueyuan Road, Shenzhen, Guangdong 518055, China
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2
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Ahmad T, Iqbal J, Bustam MA, Zulfiqar M, Muhammad N, Al Hajeri BM, Irfan M, Anwaar Asghar HM, Ullah S. Phytosynthesis of cerium oxide nanoparticles and investigation of their photocatalytic potential for degradation of phenol under visible light. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128292] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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3
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Kumar SS, Kumar V, Gnaneswar Gude V, Malyan SK, Pugazhendhi A. Alkalinity and salinity favor bioelectricity generation potential of Clostridium, Tetrathiobacter and Desulfovibrio consortium in Microbial Fuel Cells (MFC) treating sulfate-laden wastewater. BIORESOURCE TECHNOLOGY 2020; 306:123110. [PMID: 32172090 DOI: 10.1016/j.biortech.2020.123110] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 02/26/2020] [Accepted: 02/28/2020] [Indexed: 06/10/2023]
Abstract
Clostridium, Tetrathiobacter and Desulfovibrio species are identified as suitable biocatalysts for treating organic-rich and sulfate-laden wastewater. Results from this study show that the power generation was much higher under alkaline conditions, i.e., pH of 8 when compared to neutral and acidic conditions. The effect of salinity was studied by varying the sodium chloride concentration at (1.5, 3, 4.5, 6, and 7.5 g/L NaCl) in anolyte. The highest power density of 1188 mW/m3 was produced at a sodium chloride concentration of 6 g/L in the anolyte. Results from cyclic voltammetry and linear scan voltammetry analysis suggested the direct electron transfer mechanism favored by cytb and cytc, Redox peaks observed for the biogenic synthesis of sulfite and sulfide support the complete one-step mineralization of sulfate. Bioelectrochemical behavior of the selectively enriched microbial consortium confirms its use for the treatment of wastewaters high in salinity and sulfate concentrations.
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Affiliation(s)
- Smita S Kumar
- Centre for Rural Development and Technology, Indian Institute of Technology Delhi, Hauz Khas, 10016 New Delhi, India; Department of Environmental Sciences, J.C. Bose University of Science and Technology, YMCA, Faridabad, 121006 Haryana, India
| | - Vivek Kumar
- Centre for Rural Development and Technology, Indian Institute of Technology Delhi, Hauz Khas, 10016 New Delhi, India
| | - Veera Gnaneswar Gude
- Department of Civil and Environmental Engineering, Mississippi State University, Mississippi State, MS 39762, United States
| | - Sandeep K Malyan
- Institute of Soil, Water, and Environmental Sciences, The Volcani Center, Agricultural Research Organization (ARO), Rishon LeZion 7505101, Israel
| | - Arivalagan Pugazhendhi
- Innovative Green Product Synthesis and Renewable Environment Development Research Group, Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Viet Nam.
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4
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Bai S, Zhang X, Yu Y, Li J, Yang Y, Wei H, Chu H. Fabricating Nitrogen‐Rich Fe−N/C Electrocatalysts through CeO
2
‐Assisted Pyrolysis for Enhanced Oxygen Reduction Reaction. ChemElectroChem 2019. [DOI: 10.1002/celc.201901167] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Suohong Bai
- College of Chemistry and Chemical Engineering, Inner Mongolia Engineering and Technology Research Center for Catalytic Conversion and Utilization of Carbon Resource MoleculesInner Mongolia University Hohhot 010021 P.R. China
| | - Xueqiong Zhang
- College of Chemistry and Chemical Engineering, Inner Mongolia Engineering and Technology Research Center for Catalytic Conversion and Utilization of Carbon Resource MoleculesInner Mongolia University Hohhot 010021 P.R. China
| | - Ying Yu
- College of Chemistry and Chemical Engineering, Inner Mongolia Engineering and Technology Research Center for Catalytic Conversion and Utilization of Carbon Resource MoleculesInner Mongolia University Hohhot 010021 P.R. China
| | - Jiefei Li
- College of Chemistry and Chemical Engineering, Inner Mongolia Engineering and Technology Research Center for Catalytic Conversion and Utilization of Carbon Resource MoleculesInner Mongolia University Hohhot 010021 P.R. China
| | - Yang Yang
- College of Chemistry and Chemical Engineering, Inner Mongolia Engineering and Technology Research Center for Catalytic Conversion and Utilization of Carbon Resource MoleculesInner Mongolia University Hohhot 010021 P.R. China
| | - Hang Wei
- College of Chemistry and Chemical Engineering, Inner Mongolia Engineering and Technology Research Center for Catalytic Conversion and Utilization of Carbon Resource MoleculesInner Mongolia University Hohhot 010021 P.R. China
| | - Haibin Chu
- College of Chemistry and Chemical Engineering, Inner Mongolia Engineering and Technology Research Center for Catalytic Conversion and Utilization of Carbon Resource MoleculesInner Mongolia University Hohhot 010021 P.R. China
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5
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Paulo MJ, Venancio RH, Freitas RG, Pereira EC, Tavares AC. Investigation of the electrocatalytic activity for ethanol oxidation of Pt nanoparticles modified with small amount (≤5 wt%) of CeO2. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.04.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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6
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A 3-dimensional C/CeO2 hollow nanostructure framework as a peroxidase mimetic, and its application to the colorimetric determination of hydrogen peroxide. Mikrochim Acta 2018; 185:417. [DOI: 10.1007/s00604-018-2957-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 08/09/2018] [Indexed: 11/27/2022]
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7
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Favaro M, Drisdell WS, Marcus MA, Gregoire JM, Crumlin EJ, Haber JA, Yano J. An Operando Investigation of (Ni–Fe–Co–Ce)Ox System as Highly Efficient Electrocatalyst for Oxygen Evolution Reaction. ACS Catal 2017. [DOI: 10.1021/acscatal.6b03126] [Citation(s) in RCA: 115] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Marco Favaro
- Advanced
Light Source, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, United States
- Joint
Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, United States
- Chemical
Sciences Division, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, United States
| | - Walter S. Drisdell
- Joint
Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, United States
- Chemical
Sciences Division, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, United States
| | - Matthew A. Marcus
- Advanced
Light Source, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, United States
| | - John M. Gregoire
- Joint
Center for Artificial Photosynthesis, California Institute of Technology, Pasadena, California 91125, United States
| | - Ethan J. Crumlin
- Advanced
Light Source, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, United States
| | - Joel A. Haber
- Joint
Center for Artificial Photosynthesis, California Institute of Technology, Pasadena, California 91125, United States
| | - Junko Yano
- Joint
Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, United States
- Chemical
Sciences Division, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, United States
- Molecular
Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, United States
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8
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Liu K, Huang X, Wang H, Li F, Tang Y, Li J, Shao M. Co 3O 4-CeO 2/C as a Highly Active Electrocatalyst for Oxygen Reduction Reaction in Al-Air Batteries. ACS APPLIED MATERIALS & INTERFACES 2016; 8:34422-34430. [PMID: 27998121 DOI: 10.1021/acsami.6b12294] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Developing high-performance and low-cost electrocatalysts for oxygen reduction reaction (ORR) is still a great challenge for Al-air batteries. Herein, CeO2, a unique ORR promoter, was incorporated into ketjenblack (KB) supported Co3O4 catalyst. We developed a facile two-step hydrothermal approach to fabricate Co3O4-CeO2/KB as a high-performance ORR catalyst for Al-air batteries. The ORR activity of Co3O4/KB was significantly increased by mixing with CeO2 nanoparticles. In addition, the Co3O4-CeO2/KB showed a better electrocatalytic performance and stability than 20 wt % Pt/C in alkaline electrolytes, making it a good candidate for highly active ORR catalysts. Co3O4-CeO2/KB favored a four-electron pathway in ORR due to the synergistic interactions between CeO2 and Co3O4. In full cell tests, the Co3O4-CeO2/KB exhibited a higher discharge voltage plateau than CeO2/KB and Co3O4/KB when used in cathode in Al-air batteries.
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Affiliation(s)
- Kun Liu
- College of Chemistry and Chemical Engineering, Central South University , Changsha 410083, P. R. China
| | - Xiaobing Huang
- College of Chemistry and Chemical Engineering, Hunan University of Arts and Science , Changde 415000, P. R. China
| | - Haiyan Wang
- College of Chemistry and Chemical Engineering, Central South University , Changsha 410083, P. R. China
- Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong, P. R. China
| | - Fuzhi Li
- College of Chemistry and Chemical Engineering, Central South University , Changsha 410083, P. R. China
- Institute of Packing & Material, Hunan University of Technology , Zhuzhou 412008, P. R. China
| | - Yougen Tang
- College of Chemistry and Chemical Engineering, Central South University , Changsha 410083, P. R. China
| | - Jingsha Li
- College of Chemistry and Chemical Engineering, Central South University , Changsha 410083, P. R. China
| | - Minhua Shao
- Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong, P. R. China
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9
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Du L, Kong F, Chen G, Du C, Gao Y, Yin G. A review of applications of poly(diallyldimethyl ammonium chloride) in polymer membrane fuel cells: From nanoparticles to support materials. CHINESE JOURNAL OF CATALYSIS 2016. [DOI: 10.1016/s1872-2067(16)62480-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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10
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Ostroverkh A, Johánek V, Kúš P, Šedivá R, Matolín V. Efficient Ceria-Platinum Inverse Catalyst for Partial Oxidation of Methanol. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:6297-6309. [PMID: 27254727 DOI: 10.1021/acs.langmuir.6b01316] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Ceria-platinum-based bilayered thin films deposited by magnetron sputtering were developed and tested in regard to their catalytic activity for methanol oxidation by employing a temperature-programmed reaction (TPR) technique. The composition and structure of the samples were characterized by X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). Both conventional (oxide-supported metal nanoparticles [NPs]) and inverse configurations (metal with oxide overlayer) were analyzed to uncover the structural dependence of activity and selectivity of these catalysts with respect to different pathways of methanol oxidation. We clearly demonstrate that the amount of cerium oxide (ceria) loading has a profound influence on methanol oxidation reaction characteristics. Adding a noncontinuous adlayer of ceria greatly enhances the catalytic performance of platinum (Pt) in favor of partial oxidation of methanol (POM), gaining an order of magnitude in the absolute yield of hydrogen. Moreover, the undesired by-production of carbon monoxide (CO) is strongly suppressed, making the ceria-platinum inverse catalyst a great candidate for clean hydrogen production. It is suggested that the methanol oxidation process is facilitated by the synergistic effect between both components of the inverse catalyst (involving oxygen from ceria and providing a reaction site on the adjacent Pt surface) as well as by the fact that the ability of ceria to exchange oxygen (i.e., to alter the oxidation state of Ce between 3+ and 4+) during the reaction is inversely proportional to its thickness. The increased redox capability of the discontinuous ceria adlayer shifts the preferred reaction pathway from dehydrogenation of hydroxymethyl intermediate to CO in favor of its oxidation to formate.
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Affiliation(s)
- Anna Ostroverkh
- Department of Surface and Plasma Science, Charles University in Prague , V Holesovickach 2, 180 00 Prague 8, Czech Republic
| | - Viktor Johánek
- Department of Surface and Plasma Science, Charles University in Prague , V Holesovickach 2, 180 00 Prague 8, Czech Republic
| | - Peter Kúš
- Department of Surface and Plasma Science, Charles University in Prague , V Holesovickach 2, 180 00 Prague 8, Czech Republic
| | - Romana Šedivá
- Department of Surface and Plasma Science, Charles University in Prague , V Holesovickach 2, 180 00 Prague 8, Czech Republic
| | - Vladimír Matolín
- Department of Surface and Plasma Science, Charles University in Prague , V Holesovickach 2, 180 00 Prague 8, Czech Republic
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11
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Chauhan S, Mori T, Masuda T, Ueda S, Richards GJ, Hill JP, Ariga K, Isaka N, Auchterlonie G, Drennan J. Design of Low Pt Concentration Electrocatalyst Surfaces with High Oxygen Reduction Reaction Activity Promoted by Formation of a Heterogeneous Interface between Pt and CeO(x) Nanowire. ACS APPLIED MATERIALS & INTERFACES 2016; 8:9059-9070. [PMID: 27008198 DOI: 10.1021/acsami.5b12469] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Pt-CeO(x) nanowire (NW)/C electrocatalysts for the improvement of oxygen reduction reaction (ORR) activity on Pt were prepared by a combined process involving precipitation and coimpregnation. A low, 5 wt % Pt-loaded CeO(x) NW/C electrocatalyst, pretreated by an optimized electrochemical conditioning process, exhibited high ORR activity over a commercially available 20 wt % Pt/C electrocatalyst although the ORR activity observed for a 5 wt % Pt-loaded CeO(x) nanoparticle (NP)/C was similar to that of 20 wt % Pt/C. To investigate the role of a CeO(x) NW promotor on the enhancement of ORR activity on Pt, the Pt-CeO(x) NW interface was characterized by using hard X-ray photoelectron spectroscopy (HXPS), transmission electron microscopy (TEM), and electron energy loss spectroscopy (EELS). Microanalytical data obtained by these methods were discussed in relation to atomistic simulation performed on the interface structures. The combined techniques of HXPS, TEM-EELS, and atomistic simulation indicate that the Pt-CeO(x) NW interface in the electrocatalyst contains two different defect clusters: Frenkel defect clusters (i.e., 2Pt(i)(••) - 4O(i)″ - 4V(o)(••) - V(Ce)″″) formed in the surface around the Pt-CeO(x) NW interface and Schottky defect clusters (i.e., (Pt(Ce)″ - 2V(O)(••) - 2Ce(Ce)') and (Pt(Ce)″ - V(O)(••))) which appear in the bulk of the Pt-CeO(x) NW interface similarly to Pt-CeO(x) NP/C. It is concluded that the formation of both Frenkel defect clusters and Schottky defect clusters at the Pt-CeO(x) NW heterointerface contributes to the promotion of ORR activity and permits the use of lower Pt-loadings in these electrocatalysts.
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Affiliation(s)
- Shipra Chauhan
- Graduate School of Chemical Sciences and Engineering, Hokkaido University , Kita 13, Nishi 8, Kita-Ku Sapporo, Hokkaido 060-8628, Japan
| | - Toshiyuki Mori
- Graduate School of Chemical Sciences and Engineering, Hokkaido University , Kita 13, Nishi 8, Kita-Ku Sapporo, Hokkaido 060-8628, Japan
| | - Takuya Masuda
- Graduate School of Chemical Sciences and Engineering, Hokkaido University , Kita 13, Nishi 8, Kita-Ku Sapporo, Hokkaido 060-8628, Japan
| | - Shigenori Ueda
- Synchrotron X-ray Station at SPring-8, NIMS , Sayo, Hyogo 679-5148, Japan
- Quantum Beam Unit, NIMS , 1-2-1 Sengen, Ibaraki 305-0044, Japan
| | | | | | | | - Noriko Isaka
- Transmission Electron Microscopy Station, NIMS , 1-2-1, Sengen, Ibaraki 305-0047, Japan
| | - Graeme Auchterlonie
- Centre for Microscopy and Microanalysis, The University of Queensland , St. Lucia, Brisbane, Queensland 4072, Australia
| | - John Drennan
- Centre for Microscopy and Microanalysis, The University of Queensland , St. Lucia, Brisbane, Queensland 4072, Australia
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12
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Hameed RMA, Amin RS, El-Khatib KM, Fetohi AE. Influence of Metal Oxides on Platinum Activity towards Methanol Oxidation in H2SO4 solution. Chemphyschem 2016; 17:1054-61. [PMID: 26748621 DOI: 10.1002/cphc.201501072] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Indexed: 11/09/2022]
Abstract
Pt-CeO2 /C, Pt-TiO2 /C, and Pt-ZrO2 /C electrocatalysts were prepared by using a modified microwave-assisted polyol process. Physical characterization was performed by using XRD, TEM, and EDX analyses. The incorporation of different metal oxides increased the dispersion degree of Pt nanoparticles and reduced their diameter to 2.50 and 2.33 nm when TiO2 and ZrO2 were introduced to Pt/C, respectively. The electrocatalytic activity of various electrocatalysts was examined towards methanol oxidation in H2 SO4 solution by using cyclic voltammetry, chronoamperometry, and electrochemical impedance spectroscopy. Among the studied composites, Pt-ZrO2 /C was selected to be a candidate electrocatalyst for better electrochemical performance in direct methanol fuel cells.
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Affiliation(s)
- R M Abdel Hameed
- Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt
| | - R S Amin
- Chemical Engineering Department, National Research Center, Dokki, Giza, Egypt
| | - K M El-Khatib
- Chemical Engineering Department, National Research Center, Dokki, Giza, Egypt.
| | - Amani E Fetohi
- Chemical Engineering Department, National Research Center, Dokki, Giza, Egypt
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13
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Chen D, Chen C, Baiyee ZM, Shao Z, Ciucci F. Nonstoichiometric Oxides as Low-Cost and Highly-Efficient Oxygen Reduction/Evolution Catalysts for Low-Temperature Electrochemical Devices. Chem Rev 2015; 115:9869-921. [DOI: 10.1021/acs.chemrev.5b00073] [Citation(s) in RCA: 666] [Impact Index Per Article: 74.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Dengjie Chen
- Department
of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Chi Chen
- Department
of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Zarah Medina Baiyee
- Department
of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Zongping Shao
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry & Chemical Engineering, Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing 210009, China
- Department
of Chemical Engineering, Curtin University, Perth, Western Australia 6845, Australia
| | - Francesco Ciucci
- Department
of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
- Department
of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
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14
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Fugane K, Mori T, Yan P, Masuda T, Yamamoto S, Ye F, Yoshikawa H, Auchterlonie G, Drennan J. Defect structure analysis of heterointerface between Pt and CeOx promoter on Pt electro-catalyst. ACS APPLIED MATERIALS & INTERFACES 2015; 7:2698-2707. [PMID: 25569301 DOI: 10.1021/am507754w] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Pt-CeOx/C (1.5 ≤ x ≤ 2) electro-catalyst is one of the most promising cathode materials for use in polymer membrane electrolyte fuel cells. To clarify the microstructure of Pt-CeOx heterointerface, we prepared Pt-loaded CeOx thin film on conductive SrTiO3 single crystal substrate by using a stepwise process of pulse laser deposition method for the preparation of epitaxial growth CeOx film followed by an impregnation method which loaded the Pt particles on the CeOx film. The electrochemistry observed for the Pt-loaded CeOx thin film on the conductive single crystal substrate was examined by using cyclic voltammetry in 0.5 M H2SO4 aqueous solution, and a cross-sectional image of the aforementioned Pt-CeOx thin film electrode was observed using a transmission electron microscope. The electrochemistry observed for Pt-CeOx thin film electrode clearly showed the promotion effect of CeOx. Also, the microanalysis indicated that unique, large clusters that consisted of C-type rare-earth-like structures were formed in the Pt-CeOx interface by a strong interaction between Pt and CeOx. The present combination analysis of the electrochemistry, microanalysis, and atomistic simulation indicates that the large clusters (i.e., 12 (PtCe''-Vo(••)) + 2 (PtCe''-2Vo(••)-2CeCe')) that were formed into the Pt-CeOx interface promoted the charge transfer between Pt surface and CeOx, suggesting that the oxygen reduction reaction activity on Pt can be maximized by fabrication of C-type rare-earth-like structure that consists of the aforementioned large clusters in the Pt-CeOx interfaces.
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Affiliation(s)
- Keisuke Fugane
- Global Research Center for Environmental and Energy Based on Nanomaterials Science (GREEN), National Institute for Materials Science (NIMS) , 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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15
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Liu X, Wu X, Scott K. Study of niobium and tantalum doped titania-supported Pt electrocatalysts for methanol oxidation and oxygen reduction reactions. Catal Sci Technol 2014. [DOI: 10.1039/c4cy00393d] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ahn CH, Kalubarme RS, Kim YH, Jung KN, Shin KH, Park CJ. Graphene/doped ceria nano-blend for catalytic oxygen reduction in non-aqueous lithium-oxygen batteries. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2013.11.092] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Influence of the preparation method and the support on H2O2 electrogeneration using cerium oxide nanoparticles. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.07.187] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Bambagioni V, Bianchini C, Chen Y, Filippi J, Fornasiero P, Innocenti M, Lavacchi A, Marchionni A, Oberhauser W, Vizza F. Energy efficiency enhancement of ethanol electrooxidation on Pd-CeO(2)/C in passive and active polymer electrolyte-membrane fuel cells. CHEMSUSCHEM 2012; 5:1266-1273. [PMID: 22517591 DOI: 10.1002/cssc.201100738] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2011] [Indexed: 05/31/2023]
Abstract
Pd nanoparticles have been generated by performing an electroless procedure on a mixed ceria (CeO(2))/carbon black (Vulcan XC-72) support. The resulting material, Pd-CeO(2)/C, has been characterized by means of transmission electron microscopy (TEM), inductively coupled plasma atomic emission spectroscopy (ICP-AES), and X-ray diffraction (XRD) techniques. Electrodes coated with Pd-CeO(2)/C have been scrutinized for the oxidation of ethanol in alkaline media in half cells as well as in passive and active direct ethanol fuel cells (DEFCs). Membrane electrode assemblies have been fabricated using Pd-CeO(2)/C anodes, proprietary Fe-Co cathodes, and Tokuyama anion-exchange membranes. The monoplanar passive and active DEFCs have been fed with aqueous solutions of 10 wt% ethanol and 2 M KOH, supplying power densities as high as 66 mW cm(-2) at 25 °C and 140 mW cm(-2) at 80 °C. A comparison with a standard anode electrocatalyst containing Pd nanoparticles (Pd/C) has shown that, at even metal loading and experimental conditions, the energy released by the cells with the Pd-CeO(2)/C electrocatalyst is twice as much as that supplied by the cells with the Pd/C electrocatalyst. A cyclic voltammetry study has shown that the co-support ceria contributes to the remarkable decrease of the onset oxidation potential of ethanol. It is proposed that ceria promotes the formation at low potentials of species adsorbed on Pd, Pd(I)-OH(ads), that are responsible for ethanol oxidation.
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Affiliation(s)
- Valentina Bambagioni
- Istituto di Chimica dei Composti Organometallici (ICCOM-CNR), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
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Schnepp Z, Hollamby MJ, Tanaka M, Matsushita Y, Katsuya Y, Sakka Y. One-step route to a hybrid TiO 2/Ti x W 1-x N nanocomposite by in situ selective carbothermal nitridation. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2012; 13:035001. [PMID: 27877489 PMCID: PMC5090278 DOI: 10.1088/1468-6996/13/3/035001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Accepted: 04/09/2012] [Indexed: 06/06/2023]
Abstract
Metal oxide/nitride nanocomposites have many existing and potential applications, e.g. in energy conversion or ammonia synthesis. Here, a hybrid oxide/nitride nanocomposite (anatase/Ti x W1-x N) was synthesized by an ammonia-free sol-gel route. Synchrotron x-ray diffraction, complemented with electron microscopy and thermogravimetric analysis, was used to study the structure, composition and mechanism of formation of the nanocomposite. The nanocomposite contained nanoparticles (<5 nm diameter) of two highly intermixed phases. This was found to arise from controlled nucleation and growth of a single oxide intermediate from the gel precursor, followed by phase separation and in situ selective carbothermal nitridation. Depending on the preparation conditions, the composition varied from anatase/Ti x W1-x N at low W content to an isostructural mixture of Ti-rich and W-rich Ti x W1-x N at high W content. In situ selective carbothermal nitridation offers a facile route to the synthesis of nitride-oxide nanocomposites. This conceptually new approach is a significant advance from previous methods, which generally require ammonolysis of a pre-synthesized oxide.
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Affiliation(s)
- Zoë Schnepp
- International Center for Young Scientists, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
| | - Martin J Hollamby
- International Center for Young Scientists, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
| | - Masahiko Tanaka
- Synchrotron X-ray Station at SPring-8, NIMS, 1-1-1, Kouto, Sayo-cho, Hyogo 679-5148, Japan
| | - Yoshitaka Matsushita
- Synchrotron X-ray Station at SPring-8, NIMS, 1-1-1, Kouto, Sayo-cho, Hyogo 679-5148, Japan
| | - Yoshio Katsuya
- SPring-8 Service Co. Ltd, 1-1-1, Kouto, Sayo-cho, Hyogo 679-5148, Japan
| | - Yoshio Sakka
- Advanced Ceramics Group, NIMS, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047 Japan
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Cheng G, Zhang JL, Liu YL, Sun DH, Ni JZ. Synthesis of novel Fe3O4@SiO2@CeO2 microspheres with mesoporous shell for phosphopeptide capturing and labeling. Chem Commun (Camb) 2011; 47:5732-4. [PMID: 21503338 DOI: 10.1039/c1cc10533g] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Fe(3)O(4)@SiO(2)@CeO(2) microspheres with magnetic core and mesoporous shell were synthesized, and the multifunctional materials were utilized to capture phosphopeptides and catalyze the dephosphorylation simultaneously, thereby labeling the phosphopeptides for rapid identification.
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Affiliation(s)
- Gong Cheng
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
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Fugane K, Mori T, Ou DR, Suzuki A, Yoshikawa H, Masuda T, Uosaki K, Yamashita Y, Ueda S, Kobayashi K, Okazaki N, Matolinova I, Matolin V. Activity of oxygen reduction reaction on small amount of amorphous CeOx promoted Pt cathode for fuel cell application. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2011.02.034] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Simonelli F, Marmorato P, Abbas K, Ponti J, Kozempel J, Holzwarth U, Franchini F, Rossi F. Cyclotron Production of Radioactive ${\hbox{CeO}} _{2}$ Nanoparticles and Their Application for In Vitro Uptake Studies. IEEE Trans Nanobioscience 2011; 10:44-50. [DOI: 10.1109/tnb.2011.2119491] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Wei YC, Liu CW, Wang KW. Surface Species Alteration and Oxygen Reduction Reaction Enhancement of PdCo/C Electrocatalysts Induced by Ceria Modification. Chemphyschem 2010; 11:3078-85. [DOI: 10.1002/cphc.201000484] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Liu CW, Wei YC, Wang KW. Preparation and characterization of carbon-supported Pt–Au cathode catalysts for oxygen reduction reaction. J Colloid Interface Sci 2009; 336:654-7. [DOI: 10.1016/j.jcis.2009.04.081] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2009] [Revised: 04/17/2009] [Accepted: 04/23/2009] [Indexed: 11/25/2022]
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Lim DH, Lee WD, Lee HI. Highly Dispersed and Nano-sized Pt-based Electrocatalysts for Low-Temperature Fuel Cells. CATALYSIS SURVEYS FROM ASIA 2008. [DOI: 10.1007/s10563-008-9059-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Fu Y, Wei ZD, Ji MB, Li L, Shen PK, Zhang J. Morphology-Controllable Synthesis of CeO 2on a Pt Electrode. NANOSCALE RESEARCH LETTERS 2008; 3:431. [PMCID: PMC3244949 DOI: 10.1007/s11671-008-9177-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2008] [Accepted: 09/11/2008] [Indexed: 05/29/2023]
Abstract
Nanoscale cerium dioxides with shape of nanoparticles, nanorods, and nanotubes were electrochemically synthesized. The morphology of CeO2was modulated by changing electrode potential and potential direction. CeO2nanorods and CeO2nanotubes were synthesized via the potentiostatic and cyclic voltammeteric methods, respectively. The morphology and structure of the obtained CeO2were characterized by field emission scanning electron microscope (FESEM) and X-ray diffraction (XRD). A possible formation mechanism has been suggested to illuminate the relationship between the preparation condition and the morphology of CeO2.
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Affiliation(s)
- Y Fu
- State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, 400044, China
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400044, China
| | - ZD Wei
- State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, 400044, China
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400044, China
- School of Material Science and Engineering, Chongqing University, Chongqing, 400044, China
| | - MB Ji
- School of Material Science and Engineering, Chongqing University, Chongqing, 400044, China
| | - L Li
- School of Material Science and Engineering, Chongqing University, Chongqing, 400044, China
| | - PK Shen
- The State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University, Guangzhou, 510275, China
| | - J Zhang
- School of Material Science and Engineering, Chongqing University, Chongqing, 400044, China
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