Fang Yuqiang, Wang Sishun, Lin Gaoxin, Wang Xin, Huang Fuqiang
State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China.
College of Chemistry, and Center of Green Catalysis, Zhengzhou University, Zhengzhou 450001, P. R. China.
Chem Commun (Camb). 2021 Aug 10;57(64):7946-7949. doi: 10.1039/d1cc02741g.
The exploration of efficient electrocatalysts for the hydrogen evolution reaction (HER) is beneficial to obtain renewable clean energy. Herein, a new parkerite-type compound Pt3Bi2S2 was synthesized, constructed by [PtBi4S2] octahedra. The Bi 6p orbital electrons upshift the Pt 5d band to promote hydrogen adsorption. Moreover, the Bi-Pt orbital hybridization greatly improves the conductivity and accelerates the charge transfer during the electrocatalytic process. Hence, Pt3Bi2S2 exhibits a superior catalytic activity for the HER with a low overpotential of 61 mV (at j = 10 mA cm-2) and a Tafel slope of 51 mV dec-1. In addition, Pt3Bi2S2 has higher stability than commercial Pt/C. This work proposes a promising strategy for designing new excellent HER catalysts.
探索用于析氢反应（HER）的高效电催化剂有利于获取可再生清洁能源。在此，合成了一种新型的硫铋铂矿型化合物Pt3Bi2S2，它由[PtBi4S2]八面体构成。Bi的6p轨道电子使Pt的5d能带向上移动，促进了氢吸附。此外，Bi-Pt轨道杂化极大地提高了电导率，并加速了电催化过程中的电荷转移。因此，Pt3Bi2S2对HER表现出优异的催化活性，过电位低至61 mV（在j = 10 mA cm-2时），塔菲尔斜率为51 mV dec-1。此外，Pt3Bi2S2比商业Pt/C具有更高的稳定性。这项工作为设计新型优异的HER催化剂提出了一种有前景的策略。
