High-entropy layered oxides nanosheets for highly efficient photoelectrocatalytic reduction of CO_(2)and application research  

作　　者：Xuefei Liu Xiaoyan Wang Beibei Yang Junzheng Zhang Jun Lu 

机构地区：[1]State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beijing 100029,China [2]Beijing Advanced Innovation Center for Soft Matter Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China

出　　处：《Nano Research》2023年第4期4775-4785,共11页纳米研究（英文版）

基　　金：the financial support from the National Basic Research Program of China(No.2014CB932101);the National Natural Science Foundation of China(Nos.21571013 and 52073023);Program for Chang Jiang Scholars and Innovative Research Team in University(No.IRT1205).

摘　　要：High-entropy oxides receive significant attention owing to their“four effects”.However,they still suffer from harsh construction conditions such as high temperature and high pressure and present a block-like structure.Herein,in this work,Ni-Mn-Cu-Co-Fe-Al high-entropy layered oxides(HELOs)with a layered nanosheet structure were constructed by a simple pathway of topological transformation under relatively low temperature(300℃)with six-membered Ni-Mn-Cu-Co-Fe-Al layered double hydroxides(LDHs)precursors,which exhibited an outstanding activity and excellent selectivity for CO_(2)photoelectroreduction(obtaining the highest carbon monoxide yield of 909.55μmol·g^(−1)·h^(−1)under−0.8 V vs.reversible hydrogen electrode(RHE),which is almost twice that of pure electrocatalysis).In addition,the charging voltage of a photo-assisted Zn-CO_(2)battery with HELOs as electrode was reduced from 2.62 to 2.40 V;the discharging voltage of the battery was increased from 0.51 to 0.59 V with the assistance of illumination.The improvement of round-trip efficiency of the battery indicates that light played a positive role in both the charging and discharging processes.This study not only lays an important foundation for the development of high-entropy oxides but also expands their application in the field of photoelectrochemistry.

关 键 词：high-entropy layered oxides(HELOs) CO_(2)reduction layered double hydroxides(LDHs) PHOTOELECTROCATALYTIC 

分 类 号：O64[理学—物理化学]