Fe/Co and Ni/Co-pentlandite type electrocatalysts for the hydrogen evolution reaction

作     者：Mathias Smialkowski David Tetzlaff Lars Hensgen Daniel Siegmund Ulf-Peter Apfel Mathias Smialkowski;David Tetzlaff;Lars Hensgen;Daniel Siegmund;Ulf-Peter Apfel

作者机构：Inorganic Chemistry I-Ruhr University BochumUniversitätsstrasse 15044801 BochumGermany Fraunhofer UMSICHTOsterfelder Strasse 346047 OberhausenGermany Tribotecc GmbHFleischmarkt 3-51010 ViennaAustria 

出 版 物：《Chinese Journal of Catalysis》 (催化学报（英文）)

年 卷 期：2021年第42卷第8期

页      面：1360-1369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：supported by the Deutsche Forschungsgemeinschaft the Doctoral School Closed Car-bon Cycle Economy(DS CCCE) the Fraunhofer Internal Programs the Fraun-hofer Cluster of Excellence CINES 

主　　题：Hydrogen Pentlandite Metal sulfides Transition metals Electrocatalysis 

摘      要：Metal-rich transition metal sulfides recently gained increasing attention as electrocatalysts for the hydrogen evolution reaction(HER),as they are capable to overcome major challenges faced by sulfide-rich metal catalysts such as limited conductivity and the necessity of ***,we present the synthesis,characterization and electrocatalytic investigation of ternary metal-rich sulfide composites FexCo9-xS8 as well as Ni_(y)Co_(9-y)S_(8)(x=y=0-4.5),which possess pentlandite-type *** this study,we show a stepwise alteration of the binary cobalt pentlandite Co9S8 and report on the replacement of cobalt with up to 4.5 equivalents of either iron or *** altered pentlandite composites facilitate the proton reduction in acidic media at different *** furthermore show that the stoichiometric variation has a decisive influence on the electrochemical activation/deactivation behavior of the catalysts under reductive electrocatalytic ***,Co-deficient composites display an improved HER performance in contrast to Co_(9)S_(8).Notably,Ni/Co compounds generally tend to show higher catalytic activities towards HER than their respective Fe/Co compounds.