Platinum-Lead-Bismuth/Platinum-Bismuth Core/Shell Nanoplate Achieves Complete 
Dehydrogenation Pathway for Direct Formic Acid Oxidation Catalysis

Hu, Xinrui; Xiao, Zhengyi; Wang, Weizhen; Bu, Lingzheng; An, Zhengchao; Liu, Shangheng; Pao, Chih-Wen; Zhan, Changhong; Hu, Zhiwei; Yang, Zhiqing; Wang, Yucheng; Huang, Xiaoqing

doi:10.1021/jacs.3c00262

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Platinum-Lead-Bismuth/Platinum-Bismuth Core/Shell Nanoplate Achieves Complete Dehydrogenation Pathway for Direct Formic Acid Oxidation Catalysis

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Hu, Zhiwei
Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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引用

Hu, X., Xiao, Z., Wang, W., Bu, L., An, Z., Liu, S., Pao, C.-W., Zhan, C., Hu, Z., Yang, Z., Wang, Y., & Huang, X. (2023). Platinum-Lead-Bismuth/Platinum-Bismuth Core/Shell Nanoplate Achieves Complete Dehydrogenation Pathway for Direct Formic Acid Oxidation Catalysis. Journal of the American Chemical Society, 145(28), 15109-15117. doi:10.1021/jacs.3c00262.

引用: https://hdl.handle.net/21.11116/0000-000D-5551-8

要旨

Designingplatinum (Pt)-based formic acid oxidation reaction (FAOR)catalysts with high performance and high selectivity of direct dehydrogenationpathway for direct formic acid fuel cell (DFAFC) is desirable yetchallenging. Herein, we report a new class of surface-uneven PtPbBi/PtBicore/shell nanoplates (PtPbBi/PtBi NPs) as the highly active and selectiveFAOR catalysts, even in the complicated membrane electrode assembly(MEA) medium. They can achieve unprecedented specific and mass activitiesof 25.1 mA cm(-2) and 7.4 A mg(Pt) (-1) for FAOR, 156 and 62 times higher than those of commercial Pt/C,respectively, which is the highest for a FAOR catalyst by far. Simultaneously,they show highly weak adsorption of CO and high dehydrogenation pathwayselectivity in the FAOR test. More importantly, the PtPbBi/PtBi NPscan reach the power density of 161.5 mW cm(-2), alongwith a stable discharge performance (45.8% decay of power densityat 0.4 V for 10 h), demonstrating great potential in a single DFAFCdevice. The in situ Fourier transform infrared spectroscopy(FTIR) and X-ray absorption spectroscopy (XAS) results collectivelyreveal a local electron interaction between PtPbBi and PtBi. In addition,the high-tolerance PtBi shell can effectively inhibit the production/adsorptionof CO, resulting in the complete presence of the dehydrogenation pathwayfor FAOR. This work demonstrates an efficient Pt-based FAOR catalystwith 100% direct reaction selectivity, which is of great significancefor driving the commercialization of DFAFC.