W/Mo-polyoxometalate-derived electrocatalyst for high-efficiency nitrogen fixation  

作　　者：Hua-Qing Yin Lu-Lu Yang Hao Sun Hao Wang Yu-Jie Wang Min Zhang Tong-Bu Lu Zhi-Ming Zhang 

机构地区：[1]Institute for New Energy Materials&Low Carbon Technologies,School of Materials Science and Engineering,Tianjin University of Technology,Tianjin 300384,China

出　　处：《Chinese Chemical Letters》2023年第3期469-472,共4页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.92161103,U21A20286,22071180);Natural Science Foundation of Tianjin City of China(No.18JCJQJC47700)。

摘　　要：Ammonia is the feedstock chemical for most fertilizers and the alternative of renewable energy carriers.Environmentally benign electrochemical nitrogen reduction reaction (NRR) under mild conditions has been recognized as one of the most attractive strategies for N_(2) fixation.Herein,inspired by Mobased nitrogenase,W/Mo-doping electrocatalysts were developed with mixed-metal polyoxometalate H_(3)PW_6Mo_6O_(40) as the precursor for high performance electrocatalytic NRR.Trace amount of Pt was transplanted on the surface of W/Mo@rGO via in situ electroplating treatment to further improve the NRR performance.The resulting Pt-W/Mo@rGO-6 achieves excellent performance for NRR with a high NH_(3)yield of 79.2μg h^(-1)mg_(cat)^(-1) due to the multicomponent synergistic effect in the composite catalyst.The Pt-W/Mo@rGO-6 represents the first example of highly efficient NRR electraocatalyst derived from mixed-metal polyoxometalate,which exhibits outstanding stability confirmed by the constant catalytic performance over 24 h chronoamperometric test.This finding opens a new avenue to construct highly efficient NRR electrocatalyst by employing mixed metal polyoxometalate as the precursor under ambient conditions.

关 键 词：POLYOXOMETALATE ELECTROCATALYSIS Mixed-metal electrocatalyst Nitrogen reduction Mild conditions 

分 类 号：TQ113[化学工程—无机化工] TQ426