Tuning Surface Lattice Strain toward a Pt-Skin CoPtx Truncated Octahedron for Hydrogen Evolution Reaction
Tuning Surface Lattice Strain toward a Pt-Skin CoPtx Truncated Octahedron for Hydrogen Evolution Reaction
复制标题
调整表面晶格应变以实现析氢反应的 Pt-Skin CoPtx 截断八面体
DOI：
10.1021/acs.jpcc.9b09001
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发表时间：
2019
影响因子：
3.7
通讯作者：
Tang Zhiyong
中科院分区：
文献类型：
--
作者：
Lin Liu;Sun Zemin;Yao Huiying;Yuan Mengwei;Yang Han;Huifeng Li;Zhang Qinghua;Wang Dawei;Gu Lin;Sun Genban;Zhu Jia;Fang Weihai;Tang Zhiyong
Lattice strain plays a critical role in controlling catalytic performance. However, few experiments or theoretical works have been reported regarding the strain–activity relationship in the hydrogen evolution reaction (HER). Herein, we have prepared platinum–skin-truncated octahedra with the formula CoPtx. Among the prepared nanocatalysts of varied composition, the CoPt2nanocatalyst exhibits an extremely small overpotential of 17 mV in acid solution at −10 mA cm–2, which is obviously superior to commercial Pt/C (30 mV). Furthermore, the overpotential of the CoPt2nanocatalyst is only 20 mV in alkaline solution, which is about a third of that of commercial Pt/C (53 mV). The experiments and density functional theory calculations reveal a “volcano”-type relationship for the strain-HER catalytic activity relationship for the first time. The theoretical calculated “volcano” relationship gives a clearer scope of the best strain toward further investigation on higher HER activity.
