Enhanced Alkaline Hydrogen Oxidation Reaction by Modifying Pt Nanoparticle Surface with Another Metal
Enhanced Alkaline Hydrogen Oxidation Reaction by Modifying Pt Nanoparticle Surface with Another Metal
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用另一种金属修饰 Pt 纳米粒子表面增强碱性氢氧化反应
DOI：
10.1149/09208.0733ecst
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Satsuma Atsushi
中科院分区：
文献类型：
--
作者：
Ohyama Junya;Okubo Keiichi;Satsuma Atsushi
通过改进阳极上的氢氧化反应（HOR）催化剂，并借助具有高离子电导率的先进阴离子交换膜燃料电池（AEMFC），使其电池性能更接近质子交换膜燃料电池（PEMFC）。然而，碱性HOR催化剂的开发仍然需要减少AEMFC阳极上贵金属的使用。在此，Pt/C催化剂使用除Tc之外的元素周期表第4和第5周期的第4-11族的15种金属，即Ti、V、Cr、Mn、Fe、Co、Ni、Cu、Zr、Nb、Mo、Ru、Rh、Pd、Ag进行改性以提高HOR活性。此外，通过对改性Pt/C的氢键结合能和改性金属的亲氧性的研究，揭示了改性Pt/C提高/降低HOR活性的机理。
The cell performance of anion exchange membrane fuel cells (AEMFCs) has been getting closer to that of proton exchange membrane fuel cells (PEMFCs) by improvement of hydrogen oxidation reaction (HOR) catalysts on anodes with the help of the state-of-the-art AEMs having high ion conductivity. However, development of the alkaline HOR catalysts is still demanded to reduce the usage of precious metals on AEMFC anode. Here, Pt/C catalyst is modified to improve the HOR activity using fifteen metals on the group 4-11 of the 4th and 5th period in the periodic table except for Tc, ie, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zr, Nb, Mo, Ru, Rh, Pd, Ag. In addition, the hydrogen binding energy of modified Pt/C and the oxophilicity of modifying metals are evaluated to reveal the mechanism of improved/lowered HOR activity.