Enhanced electrochemical CO_(2)reduction coupled with urea oxidation using bifunctional atomically dispersed CuNi catalysts  

作　　者：Wenjie Wu Haoyang Zhou Ying Liu Yifei Pan Qingqing Chen Yu Zhang Junjie Mao Wenjie Ma Ping Yu 

机构地区：[1]Beijing National Laboratory for Molecular Sciences,Key Laboratory of Analytical Chemistry for Living Biosystems,Institute of Chemistry,Chinese Academy of Sciences(CAS),Beijing 100190,China [2]College of Chemistry and Materials Science,Anhui Normal University,Wuhu 241002,China [3]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Nano Research》2025年第1期208-216,共9页纳米研究（英文版）

基　　金：support from the Natural Science Foundation of Beijing(No.2242028 for W.J.M.,No.Z230022 for P.Y.);the National Natural Science Foundation of China(Nos.22125406 and 22074149 for P.Y.);the National Basic Research Program of China(Nos.2022YFA1204500 and 2022YFA1204503).

摘　　要：The electrochemical conversion of carbon dioxide(CO_(2))into chemical fuels represents a promising approach for addressing global carbon balance issues.However,this process is hindered by the kinetic limitations of anodic reactions,usually the oxygen evolution reaction,resulting in less efficient production of high value-added products.Here,we report an integrated electrocatalytic system that couples CO_(2)reduction reaction(CO_(2)RR)with urea oxidation reaction(UOR)using a bifunctional electrocatalyst with atomically dispersed dual-metal CuNi sites anchored on bamboo-like nitrogen-doped carbon nanotubes(CuNi-CNT),which were synthesized through a one-step pyrolysis process.The bifunctional CuNi-CNT catalyst exhibits a near 100%CO Faraday efficiency for CO_(2)RR over a wide potential range and outstanding UOR performance with a negatively shifted potential of 210 mV at 10 mA·cm^(-2).In addition,we assemble a two-electrode electrolyzer using bifunctional CuNi-CNT-modified carbon fiber paper electrodes as both cathode and anode,capable of operating at a remarkably low cell voltage of 1.81 V at 10 mA·cm-2,significantly lower than conventional setups.The study provides a novel avenue to achieving an efficient carbon cycle with reduced electric power consumption.

关 键 词：electrochemical conversion bimetallic site catalyst bifunctional electrocatalyst carbon dioxide reduction urea oxidation 

分 类 号：O646[理学—物理化学]