Lattice strain induced by trace Pt single atoms in nickel for accelerating industrial hydrogen evolution  

作　　者：Rui Yao Yun Wu Kaiyang Zhang Shuhui Fan Qiang Zhao Jinping Li Guang Liu 

机构地区：[1]College of Chemical Engineering and Technology,Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China [2]Shanxi Research Institute of Huairou Laboratory,Taiyuan 030031,Shanxi,China

出　　处：《Journal of Energy Chemistry》2024年第11期503-511,共9页能源化学（英文版）

基　　金：National Natural Science Foundation of China (grants U22A20418, 22075196, and 21878204);Research Project Supported by Shanxi Scholarship Council of China (2022-050)。

摘　　要：Strategically designing the electrocatalytic system and cleverly inducing strain is an effective approach to balance the cost and activity of Pt-based electrocatalysts for industrial-scale hydrogen production.Herein,we present a unipolar pulsed electrodeposition(UPED) strategy to induce strain in the Ni lattice by introducing trace amounts of Pt single atoms(SAs)(0.22 wt%).The overpotential decreased by 183 mV at 10 mA cm^(-2) in 1.0 M KOH after introducing trace amounts of Pt_(SAs).The industrial electrolyzer,assembled with Pt_(SAs)Ni cathode and a commercial NiFeO_(x) anode,requires a cell voltage of 1.90 V to attain 1 A cm^(-2) of current density and remains stable for 280 h,demonstrating significant potential for practical applications.Spherical aberration corrected scanning transmission electron microscopy(AC-STEM),X-ray absorption(XAS),and geometric phase analysis(GPA) indicate that the introduction of trace amounts of Pt SAs induces tensile strain in the Ni lattice,thereby altering the local electronic structure and coordination environment around cubic Ni for enhancing the water decomposition kinetics and fundamentally changing the reaction pathway.The doping-strain strategy showcases conformational relationships that could offer new ideas to construct efficient hydrogen evolution reaction(HER) electrocatalysts for industrial hydrogen production in the future.

关 键 词：Unipolar pulsed electrodeposition Pt single atoms Ni lattice Hydrogen evolution reaction H intermediates 

分 类 号：TQ116.2[化学工程—无机化工] TQ426