Engineering bunched Pt-Ni alloy nanocages for efficient oxygen reduction in practical fuel cells
Development of efficient and robust electrocatalysts is critical for practical fuel cells. We report one-dimensional bunched platinum-nickel (Pt-Ni) alloy nanocages with a Pt-skin structure for the oxygen reduction reaction that display high mass activity (3.52 amperes per milligram platinum) and sp...
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sg-ntu-dr.10356-1385902023-12-29T06:53:29Z Engineering bunched Pt-Ni alloy nanocages for efficient oxygen reduction in practical fuel cells Tian, Xinlong Zhao, Xiao Su, Ya-Qiong Wang, Lijuan Wang, Hongming Dang, Dai Chi, Bin Liu, Hongfang Hensen, Emiel J. M. Lou, David Xiong Wen Xia, Bao Yu School of Chemical and Biomedical Engineering Engineering::Chemical technology Nanomaterial Fuel Development of efficient and robust electrocatalysts is critical for practical fuel cells. We report one-dimensional bunched platinum-nickel (Pt-Ni) alloy nanocages with a Pt-skin structure for the oxygen reduction reaction that display high mass activity (3.52 amperes per milligram platinum) and specific activity (5.16 milliamperes per square centimeter platinum), or nearly 17 and 14 times higher as compared with a commercial platinum on carbon (Pt/C) catalyst. The catalyst exhibits high stability with negligible activity decay after 50,000 cycles. Both the experimental results and theoretical calculations reveal the existence of fewer strongly bonded platinum-oxygen (Pt-O) sites induced by the strain and ligand effects. Moreover, the fuel cell assembled by this catalyst delivers a current density of 1.5 amperes per square centimeter at 0.6 volts and can operate steadily for at least 180 hours. NRF (Natl Research Foundation, S’pore) Accepted version 2020-05-11T01:57:22Z 2020-05-11T01:57:22Z 2019 Journal Article Tian, X., Zhao, X., Su, Y.-Q., Wang, L., Wang, H., Dang, D., . . . Xia, B. Y. (2019). Engineering bunched Pt-Ni alloy nanocages for efficient oxygen reduction in practical fuel cells. Science, 366(6467), 850-856. doi:10.1126/science.aaw7493 0036-8075 https://hdl.handle.net/10356/138590 10.1126/science.aaw7493 31727830 2-s2.0-85075054193 6467 366 850 856 en Science © 2019 The Authors. Some rights reserved. This paper was published by American Association for the Advancement of Science in Science and is made available with permission of The Authors. application/pdf |
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Engineering::Chemical technology Nanomaterial Fuel Tian, Xinlong Zhao, Xiao Su, Ya-Qiong Wang, Lijuan Wang, Hongming Dang, Dai Chi, Bin Liu, Hongfang Hensen, Emiel J. M. Lou, David Xiong Wen Xia, Bao Yu Engineering bunched Pt-Ni alloy nanocages for efficient oxygen reduction in practical fuel cells |
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Development of efficient and robust electrocatalysts is critical for practical fuel cells. We report one-dimensional bunched platinum-nickel (Pt-Ni) alloy nanocages with a Pt-skin structure for the oxygen reduction reaction that display high mass activity (3.52 amperes per milligram platinum) and specific activity (5.16 milliamperes per square centimeter platinum), or nearly 17 and 14 times higher as compared with a commercial platinum on carbon (Pt/C) catalyst. The catalyst exhibits high stability with negligible activity decay after 50,000 cycles. Both the experimental results and theoretical calculations reveal the existence of fewer strongly bonded platinum-oxygen (Pt-O) sites induced by the strain and ligand effects. Moreover, the fuel cell assembled by this catalyst delivers a current density of 1.5 amperes per square centimeter at 0.6 volts and can operate steadily for at least 180 hours. |
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School of Chemical and Biomedical Engineering |
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School of Chemical and Biomedical Engineering Tian, Xinlong Zhao, Xiao Su, Ya-Qiong Wang, Lijuan Wang, Hongming Dang, Dai Chi, Bin Liu, Hongfang Hensen, Emiel J. M. Lou, David Xiong Wen Xia, Bao Yu |
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Article |
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Tian, Xinlong Zhao, Xiao Su, Ya-Qiong Wang, Lijuan Wang, Hongming Dang, Dai Chi, Bin Liu, Hongfang Hensen, Emiel J. M. Lou, David Xiong Wen Xia, Bao Yu |
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Tian, Xinlong |
title |
Engineering bunched Pt-Ni alloy nanocages for efficient oxygen reduction in practical fuel cells |
title_short |
Engineering bunched Pt-Ni alloy nanocages for efficient oxygen reduction in practical fuel cells |
title_full |
Engineering bunched Pt-Ni alloy nanocages for efficient oxygen reduction in practical fuel cells |
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Engineering bunched Pt-Ni alloy nanocages for efficient oxygen reduction in practical fuel cells |
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Engineering bunched Pt-Ni alloy nanocages for efficient oxygen reduction in practical fuel cells |
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engineering bunched pt-ni alloy nanocages for efficient oxygen reduction in practical fuel cells |
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2020 |
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https://hdl.handle.net/10356/138590 |
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1787136778049683456 |