电催化剂
电解
催化作用
化学工程
材料科学
双金属片
电化学
选择性
氧化物
镍
铜
气体扩散电极
无机化学
纳米技术
化学
电解质
电极
冶金
有机化学
物理化学
工程类
作者
Min Wang,Bingqing Xu,He Ren,Ge Bai,Xuetao Luo,Rong Shao,Lulu Li,Kai Wu,Jinli Qiao
标识
DOI:10.1016/j.jcis.2023.10.085
摘要
CO2 electrochemical reduction is a sustainable approach to achieve chemical fixation of CO2 and storage of renewable energy. However, the catalyst which has the ability of mediating CO2 to a single product with a relatively high current density is highly demand. Herein, we reported a metallic nitrogen-carbon catalyst based on two kinds of metal phthalocyanines by a facile synthesis method. The synergistic effect of Cu and Ni and the active sites of nickel oxide/copper nanocluster endow the catalyst excellent performance towards CO2-into-CO electroreduction. Typically, the Cu-Ni bimetallic catalyst achieves high selectivity (85.2 %) at positive potential (−0.72 VRHE), with the stability of current density and product selectivity beyond 72 h. The volume ratio of CO/H2 can be effectively tuned (from 2:1, 1:1 to 1:2) by controlling the electrolysis potential, which is promising for synthesis gas in the Fischer-Tropsch reactions and methanol synthesis. Furthermore, the advantages are further amplified by applying it to zero-gap membrane flow reactor, which can enhance the selectivity over 90 % at a broad potential range (−2.5 ∼ −2.7 V) and achieve an current density of 9-fold of H-type cell. Our work proves a way for optimizing the CO2 electrocatalyst and electrolyzers.
科研通智能强力驱动
Strongly Powered by AbleSci AI