Phosphorus substitution into Co_(3)S_(4) nanoneedle arrays for efficient hydrogen evolution catalysis  

作　　者：Zhangtao Guo Gaoqi Tian Lin Liu Binyu Zhang Qiang Wu Yang Cao Jinchun Tu Lei Ding Xiaolin Zhang 

机构地区：[1]State Key Laboratory of Marine Resource Utilization in South China Sea,School of Materials Science and Engineering,Hainan University,Haikou 570228,China [2]School of Tropical Medicine and Laboratory Medicine,MOE Key Laboratory of Emergency and Trauma,Hainan Medical University,Haikou 571199,China [3]Key Laboratory Of Child Cognition&Behavior Development Of Hainan Province,Qiongtai Normal University,Haikou 571127,China

出　　处：《Journal of Materials Science & Technology》2021年第30期52-58,共7页材料科学技术（英文版）

基　　金：Chinese Academy of Medical Sciences for the support;financially supported by the Finance Science and Technology Project of Hainan Province(Nos.ZDYF2019161 and 2019RC221);the National Natural Science Foundation of China(Nos.51762012,81860373 and 51862006);Central Government for Local Science and Technology(No.ZY2019HN0909);Key Laboratory and Trauma(Hainan Medical University),Ministry of Education(No.KLET-201910)。

摘　　要：Transition-metal based hybrids with excellent stability and activity are favorable candidates for hydrogen evolution reaction(HER).The development of typical Co_(3)S_(4)has recently received considerable attention due to the multiple valences of the spinel-structured compound.However,the in-depth effect of the dopants on the HER performance of Co_(3)S_(4)has not been systematically clarified.Here,we report a sequential synthesis of a spinel-structured cobalt phosphosulfate nanoneedle arrays grown on carbon cloth(namely,P-Co_(3)S_(4)/CC).Results indicate that P-Co_(3)S_(4)/CC exhibits high electrocatalytic performance for HER with a low overpotential of 65 mV to drive10 mAcm……(-2),a small Tafel slope of 76.6 mV per decade,and great long-term stability for 25 h at various current densities in alkaline electrolyte.The first-principle calculation result reveals that the phosphorous doping work at Co_(3)S_(4)enhances the HER performance significantly because the tetrahedral Co^(2+)active sites nearest the P atoms more easily weaken the H-O bond to form intermediates.The experiment result characterization and theoretical calculations further show that the introduction of P atom not only offers more active sites but also improves the electrical conductivity in an alkaline electrolyte solution.Consequently,the identification of active species provides feasible guidance for the further design of high-performance spinel-structured catalysts.

关 键 词：P-Co_(3)S_(4)/CC P substitution Electronic conductivity HER 

分 类 号：TQ116.21[化学工程—无机化工] TQ426[一般工业技术—材料科学与工程] TB383.1