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Ma Y, Peng J, Tian J, Gao W, Xu J, Li F, Tieu P, Hu H, Wu Y, Chen W, Pan L, Shang W, Tao P, Song C, Zhu H, Pan X, Deng T, Wu J. Highly stable and active catalyst in fuel cells through surface atomic ordering. SCIENCE ADVANCES 2024; 10:eado4935. [PMID: 39423264 PMCID: PMC11488532 DOI: 10.1126/sciadv.ado4935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Accepted: 09/13/2024] [Indexed: 10/21/2024]
Abstract
Shape-controlled alloy nanoparticle catalysts have been shown to exhibit improved performance in the oxygen reduction reaction (ORR) in liquid half-cells. However, translating the success to catalyst layers in fuel cells faces challenges due to the more demanding operation conditions in membrane electrode assembly (MEA). Balancing durability and activity is crucial. Here, we developed a strategy that limits the atomic diffusion within surface layers, fostering the phase transition and shape retention during thermal treatment. This enables selective transformation of platinum-iron nanowire surfaces into intermetallic structures via atomic ordering at a low temperature. The catalysts exhibit enhanced MEA stability with 50% less Fe loss while maintaining high catalytic activity comparable to that in half-cells. Density functional calculations suggest that the ordered intermetallic surface stabilizes morphology against rapid corrosion and improves the ORR activity. The surface engineering through atomic ordering presents potential for practical application in fuel cells with shape-controlled Pt-based alloy catalysts.
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Affiliation(s)
- Yanling Ma
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Jiaheng Peng
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Jiakang Tian
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Wenpei Gao
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
- Department of Materials Science and Engineering, University of California, Irvine, 5200 Engineering Hall, Irvine, CA 92697, USA
- Department of Materials Science and Engineering, North Carolina State University, 911 Partners Way, Raleigh, NC 27695, USA
- Future Material Innovation Center, Zhangjiang Institute for Advanced Study, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Jialiang Xu
- University of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Fan Li
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Peter Tieu
- Department of Chemistry, University of California, Irvine, 1102 Natural Science II, Irvine, CA 92697, USA
| | - Hao Hu
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Yi Wu
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Wenlong Chen
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Lei Pan
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Wen Shang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Peng Tao
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Chengyi Song
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Hong Zhu
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Xiaoqing Pan
- Department of Materials Science and Engineering, University of California, Irvine, 5200 Engineering Hall, Irvine, CA 92697, USA
- Department of Physics and Astronomy, University of California, Irvine, 4129 Frederick Reines Hall, Irvine, CA 92697, USA
| | - Tao Deng
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
- Center of Hydrogen Science, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Jianbo Wu
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
- Future Material Innovation Center, Zhangjiang Institute for Advanced Study, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
- Center of Hydrogen Science, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
- Materials Genome Initiative Center, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
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Alonso-Vante N. Parameters Affecting the Fuel Cell Reactions on Platinum Bimetallic Nanostructures. ELECTROCHEM ENERGY R 2023. [DOI: 10.1007/s41918-022-00145-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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3
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Choi EY, Lee D, Kim J, Kim CK, Kang E. Enhanced electrocatalytic activity of N-doped nano-onion/gold nanorod nanocomposites for the oxygen reduction reaction. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2021.139816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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4
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Yun Q, Xu J, Wei T, Ruan Q, Zhu X, Kan C. Synthesis of Pd nanorod arrays on Au nanoframes for excellent ethanol electrooxidation. NANOSCALE 2022; 14:736-743. [PMID: 34939638 DOI: 10.1039/d1nr05987d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Au-Pd hollow nanostructures have attracted a lot of attention because of their excellent ethanol electrooxidation performance. Herein, we report a facile preparation of Au nanoframe@Pd array electrocatalysts in the presence of cetylpyridinium chloride. The reduced Pd atoms were directed to mainly deposit on the surface of the Au nanoframes in the form of rods, leading to the formation of Au nanoframe@Pd arrays with a super-large specific surface area. The red shift and damping of the plasmon peak were ascribed to the deposition of the Pd arrays on the surface of the Au nanoframes and nanobipyramids, which was verified by electrodynamic simulations. Surfactants, temperature and reaction time determine the growth process and thereby the architecture of the obtained Au-Pd hollow nanostructures. Compared with the Au nanoframe@Pd nanostructures and Au nanobipyramid@Pd arrays, the Au nanoframe@Pd arrays exhibit an enhanced electrocatalytic performance towards ethanol electrooxidation due to an abundance of catalytic active sites. The Au NF@Pd arrays display 4.1 times higher specific activity and 13.7 times higher mass activity than the commercial Pd/C electrocatalyst. Moreover, the nanostructure shows improved stability towards the ethanol oxidation reaction. This study enriches the manufacturing technology to increase the active sites of noble metal nanocatalysts and promotes the development of direct ethanol fuel cells.
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Affiliation(s)
- Qinru Yun
- College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
| | - Juan Xu
- College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
| | - Tingcha Wei
- College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
- Key Laboratory of Aerospace Information Materials and Physics (NUAA), MIIT, Nanjing 211106, China
| | - Qifeng Ruan
- Engineering Product Development, Singapore University of Technology and Design, Singapore 487372
| | - Xingzhong Zhu
- College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
- Key Laboratory of Aerospace Information Materials and Physics (NUAA), MIIT, Nanjing 211106, China
| | - Caixia Kan
- College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
- Key Laboratory of Aerospace Information Materials and Physics (NUAA), MIIT, Nanjing 211106, China
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Rahman MM, Inaba K, Batnyagt G, Saikawa M, Kato Y, Awata R, Delgertsetsega B, Kaneta Y, Higashi K, Uruga T, Iwasawa Y, Ui K, Takeguchi T. Synthesis of catalysts with fine platinum particles supported by high-surface-area activated carbons and optimization of their catalytic activities for polymer electrolyte fuel cells. RSC Adv 2021; 11:20601-20611. [PMID: 35479922 PMCID: PMC9033965 DOI: 10.1039/d1ra02156g] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 05/21/2021] [Indexed: 11/21/2022] Open
Abstract
Herein, we demonstrated that carbon-supported platinum (Pt/C) is a low-cost and high-performance electrocatalyst for polymer electrolyte fuel cells (PEFCs). The ethanol reduction method was used to prepare the Pt/C catalyst, which was realized by an effective matching of the carbon support and optimization of the Pt content for preparing a membrane electrode assembly (MEA). For this, the synthesis of Pt/C catalysts with different Pt loadings was performed on two different carbons (KB1600 and KB800) as new support materials. Analysis of the XRD pattern and TEM images showed that the Pt nanoparticles (NPs) with an average diameter of ca. 1.5 nm were uniformly dispersed on the carbon surface. To further confirm the size of the NPs, the coordination numbers of Pt derived from X-ray absorption fine structure (XAFS) data were used. These results suggest that the NP size is almost identical, irrespective of Pt loading. Nitrogen adsorption-desorption analysis indicated the presence of mesopores in each carbon. The BET surface area was found to increase with increasing Pt loading, and the value of the BET surface area was as high as 1286 m2 gcarbon -1. However, after 40 wt% Pt loading on both carbons, the BET surface area was decreased due to pore blockage by Pt NPs. The oxidation reduction reaction (ORR) activity for Pt/KB1600, Pt/KB800 and commercial Pt/C was evaluated by Koutecky-Levich (K-L) analysis, and the results showed first-order kinetics with ORR. The favourable surface properties of carbon produced Pt NPs with increased density, uniformity and small size, which led to a higher electrochemical surface area (ECSA). The ECSA value of the 35 wt% Pt/KB1600 catalyst was 155.0 m2 gpt -1 higher than that of the Pt/KB800 and commercial Pt/C (36.7 wt%) catalysts. A Higher ECSA indicates more available active sites for catalyst particles. The single cell test with MEA revealed that the cell voltage in the high current density regions depends on the BET surface area, and the durability of the 35 wt% Pt/KB1600 catalyst was superior to that of the 30 wt% Pt/KB800 and commercial Pt/C (46.2 wt%) catalysts. This suggests that an optimal ratio of Pt to Pt/KB1600 catalyst provides adequate reaction sites and mass transport, which is crucial to the PEFC's high performance.
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Affiliation(s)
- Md Mijanur Rahman
- Faculty of Science and Engineering, Iwate University 4-3-5 Ueda Morioka Iwate 020-8551 Japan +81-019-621-6329 +81-019-621-6329
- Graduate School of Arts and Sciences, Iwate University 4-3-5 Ueda Morioka Iwate 020-8551 Japan +81-019-621-6335 +81-019-621-6335
| | - Kenta Inaba
- Graduate School of Arts and Sciences, Iwate University 4-3-5 Ueda Morioka Iwate 020-8551 Japan +81-019-621-6335 +81-019-621-6335
| | - Garavdorj Batnyagt
- Graduate School of Arts and Sciences, Iwate University 4-3-5 Ueda Morioka Iwate 020-8551 Japan +81-019-621-6335 +81-019-621-6335
| | - Masato Saikawa
- Graduate School of Arts and Sciences, Iwate University 4-3-5 Ueda Morioka Iwate 020-8551 Japan +81-019-621-6335 +81-019-621-6335
| | - Yoshiki Kato
- Graduate School of Arts and Sciences, Iwate University 4-3-5 Ueda Morioka Iwate 020-8551 Japan +81-019-621-6335 +81-019-621-6335
| | - Rina Awata
- Graduate School of Arts and Sciences, Iwate University 4-3-5 Ueda Morioka Iwate 020-8551 Japan +81-019-621-6335 +81-019-621-6335
| | - Byambasuren Delgertsetsega
- Faculty of Science and Engineering, Iwate University 4-3-5 Ueda Morioka Iwate 020-8551 Japan +81-019-621-6329 +81-019-621-6329
- Graduate School of Arts and Sciences, Iwate University 4-3-5 Ueda Morioka Iwate 020-8551 Japan +81-019-621-6335 +81-019-621-6335
| | - Yasuo Kaneta
- JUKES Inc. 32-18-2 Osanai-cho Kuji Iwate 028-0041 Japan
| | - Kotaro Higashi
- Innovation Research Center for Fuel Cells, University of Electro-Communications 1-5-1 Chofugaoka, Chofu Tokyo 182-8585 Japan
- JASRI/SPring-8 1-1-1, Kouto, Sayo-cho Sayo-gun Hyogo 679-5198 Japan
| | - Tomoya Uruga
- Innovation Research Center for Fuel Cells, University of Electro-Communications 1-5-1 Chofugaoka, Chofu Tokyo 182-8585 Japan
- JASRI/SPring-8 1-1-1, Kouto, Sayo-cho Sayo-gun Hyogo 679-5198 Japan
| | - Yasuhiro Iwasawa
- Innovation Research Center for Fuel Cells, University of Electro-Communications 1-5-1 Chofugaoka, Chofu Tokyo 182-8585 Japan
- JASRI/SPring-8 1-1-1, Kouto, Sayo-cho Sayo-gun Hyogo 679-5198 Japan
| | - Koichi Ui
- Faculty of Science and Engineering, Iwate University 4-3-5 Ueda Morioka Iwate 020-8551 Japan +81-019-621-6329 +81-019-621-6329
- Graduate School of Arts and Sciences, Iwate University 4-3-5 Ueda Morioka Iwate 020-8551 Japan +81-019-621-6335 +81-019-621-6335
| | - Tatsuya Takeguchi
- Faculty of Science and Engineering, Iwate University 4-3-5 Ueda Morioka Iwate 020-8551 Japan +81-019-621-6329 +81-019-621-6329
- Graduate School of Arts and Sciences, Iwate University 4-3-5 Ueda Morioka Iwate 020-8551 Japan +81-019-621-6335 +81-019-621-6335
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6
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Zhang C, Gong Y, Liu H, Jin C, Guo H, He J. An efficient Co-WN/CNTs composite catalyst with multiple active sites for oxygen reduction reaction activity. Chem Phys Lett 2021. [DOI: 10.1016/j.cplett.2021.138452] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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7
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Ying Y, Godínez Salomón JF, Lartundo-Rojas L, Moreno A, Meyer R, Damin CA, Rhodes CP. Hydrous cobalt-iridium oxide two-dimensional nanoframes: insights into activity and stability of bimetallic acidic oxygen evolution electrocatalysts. NANOSCALE ADVANCES 2021; 3:1976-1996. [PMID: 36133093 PMCID: PMC9419543 DOI: 10.1039/d0na00912a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 02/04/2021] [Indexed: 06/02/2023]
Abstract
Acidic oxygen evolution reaction (OER) electrocatalysts that have high activity, extended durability, and lower costs are needed to further the development and wide-scale adoption of proton-exchange membrane electrolyzers. In this work, we report hydrous cobalt-iridium oxide two-dimensional (2D) nanoframes exhibit higher oxygen evolution activity and similar stability compared with commercial IrO2; however, the bimetallic Co-Ir catalyst undergoes a significantly different degradation process compared with the monometallic IrO2 catalyst. The bimetallic Co-Ir 2D nanoframes consist of interconnected Co-Ir alloy domains within an unsupported, carbon-free, porous nanostructure that allows three-dimensional molecular access to the catalytically active surface sites. After electrochemical conditioning within the OER potential range, the predominately bimetallic alloy surface transforms to an oxide/hydroxide surface. Oxygen evolution activities determined using a rotating disk electrode configuration show that the hydrous Co-Ir oxide nanoframes provide 17 times higher OER mass activity and 18 times higher specific activity compared to commercial IrO2. The higher OER activities of the hydrous Co-Ir nanoframes are attributed to the presence of highly active surface iridium hydroxide groups. The accelerated durability testing of IrO2 resulted in lowering of the specific activity and partial dissolution of Ir. In contrast, the durability testing of hydrous Co-Ir oxide nanoframes resulted in the combination of a higher Ir dissolution rate, an increase in the relative contribution of surface iridium hydroxide groups and an increase in specific activity. The understanding of the differences in degradation processes between bimetallic and monometallic catalysts furthers our ability to design high activity and stability acidic OER electrocatalysts.
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Affiliation(s)
- Yuanfang Ying
- Materials Science, Engineering and Commercialization Program, Texas State University San Marcos TX 78666 USA
| | | | - Luis Lartundo-Rojas
- Instituto Politécnico Nacional, Centro de Nanociencias y Micro y Nanotecnologías, UPALM Zacatenco CP 07738 Ciudad de México Mexico
| | - Ashley Moreno
- Department of Chemistry and Biochemistry, Texas State University San Marcos TX 78666 USA
| | - Robert Meyer
- Department of Chemistry and Biochemistry, Texas State University San Marcos TX 78666 USA
| | - Craig A Damin
- Department of Chemistry and Biochemistry, Texas State University San Marcos TX 78666 USA
| | - Christopher P Rhodes
- Materials Science, Engineering and Commercialization Program, Texas State University San Marcos TX 78666 USA
- Department of Chemistry and Biochemistry, Texas State University San Marcos TX 78666 USA
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8
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Khan SR, Jamil S, Bibi S, Ali S, Habib T, Janjua MRSA. A Versatile Material: Perovskite Bismuth Ferrite Microparticles as a Potential Catalyst for Enhancing Fuel Efficiency and Degradation of Various Organic Dyes. J Inorg Organomet Polym Mater 2020. [DOI: 10.1007/s10904-020-01520-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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9
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Trogadas P, Coppens MO. Nature-inspired electrocatalysts and devices for energy conversion. Chem Soc Rev 2020; 49:3107-3141. [DOI: 10.1039/c8cs00797g] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A NICE approach for the design of nature-inspired electrocatalysts and electrochemical devices for energy conversion.
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Affiliation(s)
- Panagiotis Trogadas
- EPSRC “Frontier Engineering” Centre for Nature Inspired Engineering & Department of Chemical Engineering
- University College London
- London
- UK
| | - Marc-Olivier Coppens
- EPSRC “Frontier Engineering” Centre for Nature Inspired Engineering & Department of Chemical Engineering
- University College London
- London
- UK
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10
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Campos-Roldán C, Calvillo L, Granozzi G, Alonso-Vante N. Alkaline hydrogen electrode and oxygen reduction reaction on PtxNi nanoalloys. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2019.113449] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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11
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Kim C, Dionigi F, Beermann V, Wang X, Möller T, Strasser P. Alloy Nanocatalysts for the Electrochemical Oxygen Reduction (ORR) and the Direct Electrochemical Carbon Dioxide Reduction Reaction (CO 2 RR). ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1805617. [PMID: 30570788 DOI: 10.1002/adma.201805617] [Citation(s) in RCA: 129] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 10/18/2018] [Indexed: 06/09/2023]
Abstract
In the face of the global energy challenge and progressing global climate change, renewable energy systems and components, such as fuel cells and electrolyzers, which close the energetic oxygen and carbon cycles, have become a technology development priority. The electrochemical oxygen reduction reaction (ORR) and the direct electrochemical carbon dioxide reduction reaction (CO2 RR) are important electrocatalytic processes that proceed at gas diffusion electrodes of hydrogen fuel cells and CO2 electrolyzers, respectively. However, their low catalytic activity (voltage efficiency), limited long-term stability, and moderate product selectivity (related to their Faradaic efficiency) have remained challenges. To address these, suitable catalysts are required. This review addresses the current state of research on Pt-based and Cu-based nanoalloy electrocatalysts for ORR and CO2 RR, respectively, and critically compares and contrasts key performance parameters such as activity, selectivity, and durability. In particular, Pt nanoparticles alloyed with transition metals, post-transition metals and lanthanides, are discussed, as well as the material characterization and their performance for the ORR. Then, bimetallic Cu nanoalloy catalysts are reviewed and organized according to their main reaction product generated by the second metal. This review concludes with a perspective on nanoalloy catalysts for the ORR and the CO2 RR, and proposes future research directions.
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Affiliation(s)
- Cheonghee Kim
- Department of Chemistry, Chemical Engineering Division, Technical University Berlin, 10623, Berlin, Germany
| | - Fabio Dionigi
- Department of Chemistry, Chemical Engineering Division, Technical University Berlin, 10623, Berlin, Germany
| | - Vera Beermann
- Department of Chemistry, Chemical Engineering Division, Technical University Berlin, 10623, Berlin, Germany
| | - Xingli Wang
- Department of Chemistry, Chemical Engineering Division, Technical University Berlin, 10623, Berlin, Germany
| | - Tim Möller
- Department of Chemistry, Chemical Engineering Division, Technical University Berlin, 10623, Berlin, Germany
| | - Peter Strasser
- Department of Chemistry, Chemical Engineering Division, Technical University Berlin, 10623, Berlin, Germany
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12
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Synthesis and Characterization of Mg–Zn Bimetallic Nanoparticles: Selective Hydrogenation of p-Nitrophenol, Degradation of Reactive Carbon Black 5 and Fuel Additive. J Inorg Organomet Polym Mater 2019. [DOI: 10.1007/s10904-019-01202-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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13
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Huang L, Wang Z, Gong W, Shen PK. Atomic Platinum Skin under Synergy of Cobalt for Enhanced Methanol Oxidation Electrocatalysis. ACS APPLIED MATERIALS & INTERFACES 2018; 10:43716-43722. [PMID: 30468064 DOI: 10.1021/acsami.8b17070] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
To reduce the cost of the catalyst and the consumption of Pt, a facile electrochemical displacement preparation method is proposed, and the nanostructures can be easily controlled by a strong reducing agent and a surfactant. Two distinct Pt-Co spheres, Pt-Co core-shell spheres (CSSs), and Pt-Co hollow alloy spheres (HASs) were successfully synthesized by changing the introduction of N2. Interestingly, Pt-Co CSSs possess a Pt-rich shell with 7 atomic layer thickness, which promotes the efficient utilization of Pt atoms. Pt-Co HASs have a highly open structure and a single alloy phase. For the methanol oxidation reaction, Pt-Co CSSs and Pt-Co HASs exhibit enhanced catalytic performances. Compared with the commercial Pt/C catalyst, the mass activity of the Pt-Co CSS catalyst is increased by 4 times, and it has better stability. More importantly, the current work opens a door to the batch preparation of Pt-based catalysts and synthesis of shell nanostructures.
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Affiliation(s)
- Lei Huang
- Collaborative Innovation Center of Sustainable Energy Materials, Guangxi Key Laboratory of Electrochemical Energy Materials, State Key Laboratory of Processing for Non-ferrous Metal and Featured Materials , Guangxi University , Nanning 530004 , P. R. China
| | - Zhen Wang
- Collaborative Innovation Center of Sustainable Energy Materials, Guangxi Key Laboratory of Electrochemical Energy Materials, State Key Laboratory of Processing for Non-ferrous Metal and Featured Materials , Guangxi University , Nanning 530004 , P. R. China
| | - Wenhao Gong
- Collaborative Innovation Center of Sustainable Energy Materials, Guangxi Key Laboratory of Electrochemical Energy Materials, State Key Laboratory of Processing for Non-ferrous Metal and Featured Materials , Guangxi University , Nanning 530004 , P. R. China
| | - Pei Kang Shen
- Collaborative Innovation Center of Sustainable Energy Materials, Guangxi Key Laboratory of Electrochemical Energy Materials, State Key Laboratory of Processing for Non-ferrous Metal and Featured Materials , Guangxi University , Nanning 530004 , P. R. China
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14
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Abstract
Low-noble metal electrocatalysts are attracting massive attention for anode and cathode reactions in fuel cells. Pt transition metal alloy nanostructures have demonstrated their advantages in high performance low-noble metal electrocatalysts due to synergy effects. The basic of designing this type of catalysts lies in understanding structure-performance correlation at the atom and electron level. Herein, design threads of highly active and durable Pt transition metal alloy nanocatalysts are summarized, with highlighting their synthetic realization. Microscopic and electron structure characterization methods and their prospects will be introduced. Recent progress will be discussed in high active and durable Pt transition metal alloy nanocatalysts towards oxygen reduction and methanol oxidation, with their structure-performance correlations illustrated. Lastly, an outlook will be given on promises and challenges in future developing of Pt transition metal alloy nanostructures towards fuel cells catalysis uses.
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Godínez-Salomón F, Albiter L, Alia SM, Pivovar BS, Camacho-Forero LE, Balbuena PB, Mendoza-Cruz R, Arellano-Jimenez MJ, Rhodes CP. Self-Supported Hydrous Iridium–Nickel Oxide Two-Dimensional Nanoframes for High Activity Oxygen Evolution Electrocatalysts. ACS Catal 2018. [DOI: 10.1021/acscatal.8b02171] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Fernando Godínez-Salomón
- Department of Chemistry and Biochemistry, Texas State University, San Marcos, Texas 78666, United States
| | - Luis Albiter
- Department of Chemistry and Biochemistry, Texas State University, San Marcos, Texas 78666, United States
| | - Shaun M. Alia
- Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States
| | - Bryan S. Pivovar
- Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States
| | - Luis E. Camacho-Forero
- Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Perla B. Balbuena
- Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Rubén Mendoza-Cruz
- Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - M. Josefina Arellano-Jimenez
- Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Christopher P. Rhodes
- Department of Chemistry and Biochemistry, Texas State University, San Marcos, Texas 78666, United States
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16
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Zheng Y, Qiao J, Yuan J, Shen J, Wang AJ, Gong P. One-pot synthesis of a PtPd dendritic nanocube cage superstructure on graphenes as advanced catalysts for oxygen reduction. NANOTECHNOLOGY 2018; 29:10LT01. [PMID: 29336352 DOI: 10.1088/1361-6528/aaa809] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
How to use Pt economically and efficiently in the oxygen reduction reaction (ORR) is of theoretical and practical significance for the industrialization of the proton-exchange membrane fuel cells. In order to minimize Pt consumption and optimize the ORR performance, the ORR catalysts are recommended to be designed as a porous nanostructure. Herein, we report a one-pot solvothermal strategy to prepare PtPd dendritic nanocube cages via a galvanic replacement mechanism triggered by an I- ion. These PtPd alloy crystals are nanoporous, and uniformly dispersed on reduced graphene oxides (RGOs). The size of the PtPd dendritic nanocube cages can be easily tuned from 20-80 nm by controlling their composition. Their composition is optimized to be 1:5 Pt/Pd atomic ratio for these RGO-supported PtPd dendritic nanocages. This catalyst shows superior ORR performance with a specific activity of 2.01 mA cm-2 and a mass activity of 4.45 A mg-1 Pt, far above those for Pt/C catalysts (0.288 mA cm-2 for specific activity, and 0.21 A mg-1 Pt for mass activity). In addition to ORR activity, it also exhibits robust durability with almost negligible decay in ORR mass activity after 10 000 voltammetric cycling.
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Affiliation(s)
- Yuanyuan Zheng
- Key laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Life Sciences and Chemistry, College of Geography and Environmental Science, Zhejiang Normal University, Jinhua, Zhejiang, 321004 People's Republic of China
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Wang Q, Zhao Z, Jia Y, Wang M, Qi W, Pang Y, Yi J, Zhang Y, Li Z, Zhang Z. Unique Cu@CuPt Core-Shell Concave Octahedron with Enhanced Methanol Oxidation Activity. ACS APPLIED MATERIALS & INTERFACES 2017; 9:36817-36827. [PMID: 28975789 DOI: 10.1021/acsami.7b11268] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Although tremendous efforts have been devoted to the exploration of cost-effective, active, and stable electrochemical catalysts, only few significant breakthroughs have been achieved up to now. Therefore, exploring new catalysts and improving catalyst activity and stability are still major tasks at present. Controllable synthesis of Pt-based alloy nanocrystals with a uniform high-index surface and unique architecture has been regarded as an effective strategy to optimize their catalytic efficiency toward electrochemical reactions. Accordingly, here we present a one-pot facile solvothermal process to synthesize novel unique Cu@CuPt core-shell concave octahedron nanocrystals that exhibit both outstanding activity and long durability. By regulating temperatures during the synthesis process, we were able to control the reduction rate of Cu and Pt ions, which could subsequently lead to the sequential stacking of Cu and Pt atoms. Owing to the concave structure, the as-prepared core-shell nanoparticles hold a high-index surface of {312} and {413}. Such surfaces can provide a high density of atomic steps and terraces, which is suggested to be favorable for electrochemical catalysts. Specifically, the Cu@CuPt core-shell concave octahedron presents 8.6/13.1 times enhanced specific/mass activities toward the methanol oxidation reaction in comparison to those of a commercial Pt/C catalyst, respectively. Meanwhile, the as-prepared catalyst exhibits superior durability and antiaggregation properties under harsh electrochemical conditions. The facile method used here proposes a novel idea to the fabrication of nanocrystals with desired compositional distribution, and the as-prepared product offers exciting opportunities to be applied in direct methanol fuel cells.
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Affiliation(s)
| | - Zhiliang Zhao
- Faculty of Materials and Energy, Institute for Clean Energy & Advanced Materials, Southwest University , Chongqing 400715, P. R. China
| | - Yanlin Jia
- School of Materials Science and Engineering, Beijing University of Technology , Beijing 100124, P. R. China
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