Reduced water dissociation barrier on constructing Pt-Co/CoO_(x)interface for alkaline hydrogen evolution

作     者：Yandong Wang Wei Wu Runzhe Chen Caoxin Lin Shichun Mu Niancai Cheng Yandong Wang;Wei Wu;Runzhe Chen;Caoxin Lin;Shichun Mu;Niancai Cheng

作者机构：College of Materials Science and EngineeringFuzhou UniversityFuzhou 350108China State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan 430070China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2022年第15卷第6期

页      面：4958-4964页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 0806[工学-冶金工程] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(No.21875039) the Project on the Integration of Industry-Education-Research of Fujian Province(No.2021H6020) Fujian province’s high level innovative and entrepreneurial talents(No.50012709) 

主　　题：interfacial construction amorphous cobalt oxide water dissociation dual active site electronic regulation 

摘      要：Water dissociation process is generally regarded as the rate-limiting step for alkaline hydrogen evolution reaction(HER),and severely inhibits the catalytic efficiency of Pt based *** overcome this problem,the in-situ constructed interfaces of PtCo alloy and amorphous cobalt oxide(CoO_(x))on the carbon powder are *** amorphous CoO_(x)at Pt-Co/CoO_(x)interfaces not only provide active sites for water dissociation to facilitate Volmer step,but also produce the strong electronic transfer with ***,the obtained interfacial catalysts exhibit outstanding alkaline HER performance with a Tafel slope of 29.3 mV·dec^(−1)and an ultralow overpotential of only 28 mV at 10 mA·cm^(−2).Density functional theory(DFT)reveals that the electronic accumulation on the interfacial Co atom in Pt-Co/CoO_(x)constructing the novel active site for water *** to the Pt-Co,all of the energy barriers for water adsorption,water dissociation and hydrogen adsorption/desorption are reduced in Pt-Co/CoO_(x)interfaces,suggesting a boosted HER kinetics for alkaline HER.