Immobilizing Ordered Oxophilic Indium Sites on Platinum Enabling Efficient Hydrogen Oxidation in Alkaline Electrolyte

作者：Jie Wu, Xin Gao, Guimei Liu, Xiaoyi Qiu, Qing Xia, Xinzhong Wang, Wenxiang Zhu, Tiwei He, Yunjie Zhou, Kun Feng, Jiaxuan Wang, Hui Huang, Yang Liu, Minhua Shao, Zhenhui Kang, Xiao Zhang · 发表于：Journal of the American Chemical Society · 年份：2024 · DOI：10.1021/jacs.4c05844 · 被引用次数：67 · 研究领域：Electrocatalysts for Energy Conversion、Catalytic Processes in Materials Science、Catalysis and Oxidation Reactions

Addressing the sluggish kinetics in the alkaline hydrogen oxidation reaction (HOR) is a pivotal yet challenging step toward the commercialization of anion-exchange membrane fuel cells (AEMFCs). Here, we have successfully immobilized indium (In) atoms in an orderly fashion into platinum (Pt) nanoparticles supported by reduced graphene oxide (denoted as O-Pt 3 In/rGO), significantly enhancing alkaline HOR kinetics. We have revealed that the ordered atomic matrix enables uniform and optimized hydrogen binding energy (HBE), hydroxyl binding energy (OHBE), and carbon monoxide binding energy (COBE) across the catalyst. With a mass activity of 2.3066 A mg –1 at an overpotential of 50 mV, over 10 times greater than that of Pt/C, the catalyst also demonstrates admirable CO resistance and stability. Importantly, the AEMFC implementing this catalyst as the anode catalyst has achieved an impressive power output compared to Pt/C. This work not only highlights the significance of constructing ordered oxophilic sites for alkaline HOR but also sheds light on the design of well-structured catalysts for energy conversion.