Hierarchically porous Cu/Zn bimetallic catalysts for highly selective CO2 electroreduction to liquid C2 products

[Display omitted] •An efficient method is reported to fabricate hierarhically porours Cu/Zn alloy catalysts.•Molar ratios of the resultant Cu/Zn catalysts are precisely tuned.•The Cu/Zn alloys are catalytically active for CO2 reduction and selective towards C2 formation.•Synnergically structural and...

Full description

Saved in:
Bibliographic Details
Published in:Applied catalysis. B, Environmental Environmental, 2020-07, Vol.269, p.118800, Article 118800
Main Authors: Su, Xingsong, Sun, Yuanmiao, Jin, Lei, Zhang, Lei, Yang, Yue, Kerns, Peter, Liu, Ben, Li, Shuzhou, He, Jie
Format: Article
Language:English
Subjects:
Alloys
Bimetals
Carbon dioxide
Catalysts
CO2 electroreduction
Composition
Copper
Cu/Zn alloys
Electrowinning
Ethanol
Hierarchically porous materials
Polymers
Prepolymers
Selectivity
Self-assembly
Templated synthesis
Zinc
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:[Display omitted] •An efficient method is reported to fabricate hierarhically porours Cu/Zn alloy catalysts.•Molar ratios of the resultant Cu/Zn catalysts are precisely tuned.•The Cu/Zn alloys are catalytically active for CO2 reduction and selective towards C2 formation.•Synnergically structural and compositional advantages promote the selective electroreduction of CO2. Hierarchically macroporous-mesoporous (HMMP) Cu/Zn alloy catalysts are reported to promote CO2 electroreduction towards liquid C2 products. HMMP Cu/Zn alloys with two types of distinct pores (∼320 nm and ∼20 nm) and adjustable alloy compositions are prepared through the interfacial self-assembly of two polymer templates and metal precursors. Due to add-in synergies of hierarchically porous structures and bimetallic elemental compositions, the resultant HMMP Cu/Zn alloy catalysts remarkably promote the deep electroreduction of CO2 to liquid C2 products while simultaneously suppressing the competitive proton reduction. Among them, HMMP Cu5Zn8 exhibits the best electrocatalytic selectivity (with a very high ethanol production of 46.6 % at −0.8 V) and excellent stability (even after electrocatalysis for 11 h) towards CO2 electroreduction. This strategy allows for the reliable synthesis of other HMMP alloy nanocatalysts for a wide range of electrocatalytic applications.
ISSN:0926-3373
1873-3883
DOI:10.1016/j.apcatb.2020.118800