Heterostructural NiFeW disulfide and hydroxide dual‐trimetallic core‐shell nanosheets for synergistically effective water oxidatio  

作　　者：Peng‐Fei Guo Yang Yang Bing Zhu Qian‐Nan Yang Yan Jia Wei‐Tao Wang Zhao‐Tie Liu Shi‐Qiang Zhao Xun Cui 

机构地区：[1]Key Laboratory of Chemical Additives for China National Light Industry,College of Chemistry and Chemical Engineering,Shaanxi University of Science and Technology,Xi'an,China [2]School of Chemistry and Chemical Engineering,Shaanxi Normal University,Xi'an,China [3]Key Laboratory of Carbon Materials of Zhejiang Province,Wenzhou Key Lab of Advanced Energy Storage and Conversion,Zhejiang Province Key Lab of Leather Engineering,College of Chemistry and Materials Engineering,Wenzhou University,Wenzhou,China [4]State Key Laboratory of New Textile Materials and Advanced Processing Technologies,Wuhan Textile University,Wuhan,China

出　　处：《Carbon Energy》2024年第8期192-204,共13页碳能源（英文）

基　　金：National Natural Science Foundation of China,Grant/Award Numbers:21978160,52003300,52373087;Shaanxi Province Natural Science Foundation,Grant/Award Number:2024JC‐YBMS‐131。

摘　　要：A stable and highly active core‐shell heterostructure electrocatalyst is essential for catalyzing oxygen evolution reaction(OER).Here,a dual‐trimetallic core‐shell heterostructure OER electrocatalyst that consists of a NiFeWS_(2) inner core and an amorphous NiFeW(OH)_(z)outer shell is designed and synthesized using in situ electrochemical tuning.The electrochemical measurements of different as‐synthesized catalysts with a similar mass loading suggest that the core‐shell Ni_(0.66)Fe_(0.17)W_(0.17)S_(2)@amorphous NiFeW(OH)_(z) nanosheets exhibit the highest overall performance compared with that of other bimetallic reference catalysts for the OER.Additionally,the nanosheet arrays were in situ grown on hydrophilic‐treated carbon paper to fabricate an integrated three‐dimensional electrode that affords a current density of 10 mA cm^(−2) at a small overpotential of 182 mV and a low Tafel slope of 35 mV decade^(−1) in basic media.The Faradaic efficiency of core‐shell Ni_(0.66)Fe_(0.17)W_(0.17)S_(2)@amorphous NiFeW(OH)_(z) is as high as 99.5% for OER.The scanning electron microscope,transmission electron microscope,and X‐ray photoelectron spectroscopy analyses confirm that this electrode has excellent stability in morphology and elementary composition after long‐term electrochemical measurements.Importantly,density functional theory calculations further indicate that the core‐shell heterojunction increased the conductivity of the catalyst,optimized the adsorption energy of the OER intermediates,and improved the OER activity.This study provides a universal strategy for designing more active core‐shell structure electrocatalysts based on the rule of coordinated regulation between electronic transport and active sites.

关 键 词：amorphous NiFeW hydroxide core‐shell heterojunction in situ electrochemical tuning NiFeW disulfide oxygen evolution reaction 

分 类 号：TB383[一般工业技术—材料科学与工程]