Hetero-phase zirconia encapsulated with Au nanoparticles for boosting electrocatalytic nitrogen reduction  

作　　者：Xue Xin Qiming Qu Islam E.Khalil Yuting Huang Mo Wei Jie Chen Weina Zhang Fengwei Huo Wenjing Liu 

机构地区：[1]Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM),Nanjing Tech University,Nanjing 211816,China

出　　处：《Chinese Chemical Letters》2024年第5期509-513,共5页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation(Nos.22075133 and 21701086)。

摘　　要：Electrocatalytic nitrogen reduction reaction(NRR)is considered as an attractive approach for ammonia synthesis under mild conditions.A bottleneck of NRR is the exploration of efficient catalysts for accelerating reaction kinetics,among which heterogeneous structures possessing distinct atomic arrangement could modify electronic structure,and therefore altering their NRR activity.Here,we report a facile strategy for fabricating hetero-phase metal oxides derived from metal organic framework that are further integrated with Au nanoparticles as NRR catalysts.The phase composition of zirconia can be easily adjusted by simply changing the reaction temperature,where the monoclinic and tetragonal phases with the roughly close proportions have a distinct interface,leading to a strong interaction between Au and ZrO_(2).The enhanced interaction renders Au to be more electropositive and facilitates stronger binding to N_(2).As a result,a remarkable ammonia yield of 22.32μg h^(-1)mg_(cat.)^(-1) and a Faradaic efficiency of 31.92%can be achieved at low overpotential.This work is expected to pave the way for the design of heterogeneous structures and the exploration of hetero-phase nanostructures in boosting the electrocatalytic NRR.

关 键 词：Hetero-phase Metal-organic framework derivatives ZIRCONIA Nitrogen reduction reaction ELECTROCHEMISTRY 

分 类 号：TQ113.2[化学工程—无机化工] TQ426