Ni_(3)S_(2) nanocrystals in-situ grown on Ni foam as highly efficient electrocatalysts for alkaline hydrogen evolution

作     者：Rui Sun Zhan-Hua Su Zhi-Feng Zhao Mei-Qi Yang Tian-Sheng Li Jing-Xiang Zhao Yong-Chen Shang Rui Sun;Zhan-Hua Su;Zhi-Feng Zhao;Mei-Qi Yang;Tian-Sheng Li;Jing-Xiang Zhao;Yong-Chen Shang

作者机构：College of ChemistryGuangdong University of Petrochemical TechnologyMaoming525000China College of Chemistry and Chemical EngineeringHarbin Normal UniversityHarbin150025China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2023年第42卷第10期

页      面：3420-3429页

核心收录：

学科分类：081702[工学-化学工艺] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by the Project of Talent Recruitment of Guangdong University of Petrochemical Technology (Nos. 2019rc052 and 2019rc054) 

主　　题：Ni_(3)S_(2) Electrocatalysts Hydrogen evolution reaction Density functional theory calculations 

摘      要：The exploitation of cost-efficient electrocatalysts is critical to develop the hydrogen evolution reaction(HER) for hydrogen ***,Ni_(3)S_(2)/NF-x h(x=12,16 and 20,reaction time) nanocrystals in-situ grown on Ni foam(NF) were prepared via a facile hydrothermal *** results demonstrate that the reaction time plays key roles in the morphology,the hydrogen evolution performance of the samples,and the hydrogen brittleness of NF ***,the Ni_(3)S_(2)/NF-16 h displays outstanding catalytic activity for HER in alkaline solution and avoids the hydrogen brittleness of the NF skeletons *** afford a catalytic current of20 mA·cm^(-2),Ni_(3)S_(2)/NF-16 h presents ultra-low overpotential of 48 mV for hydrogen evolution and sufficient stability for 40 ***,the density functional theory(DFT) calculations revealed that the excellent electrocatalytic HER activity of Ni_(3)S_(2) could be attributed to its exposed(015) plane,which exhibited good capability for water adsorption and dissociation in an alkaline electrolyte,leading to the optimal free energy for H^(*) *** present work offers a novel strategy to design,synthesize and develop highly efficient electrocatalysts for HER.