Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 291, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2021.120030
Keywords
Carbon dioxide reduction; Electrocatalysis; Bimetallic catalyst; Surface decoration
Funding
- Australian Research Council (ARC)
- ARC Centre of Excellence for Electromaterials Science
- Monash-Warwick Accelerator Fund
Ask authors/readers for more resources
This work introduces a coordination enabled galvanic replacement method to decorate atomic Ni clusters on defect-rich Cu surface, resulting in significant enhancement of C2 products production in electrocatalytic CO2 reduction. With a surface Ni/Cu ratio of 0.82 %, a 7-fold increase in selectivity for C2 products was observed compared to pristine Cu, attributed to the chemisorption of CO2 on Ni decorated surfaces changing the rate determining step for *CO formation. The catalytic mechanism demonstrated in the Cu-Ni system points to new directions for the development of advanced bimetallic electrocatalysts for producing multi-carbon materials from CO2 reduction.
This work describes a coordination enabled galvanic replacement method to decorate atomic Ni clusters on defect-rich Cu surface to provide the first Ni/Cu bimetallic system that significantly enhances the production of C2 products from electrocatalytic CO2 reduction. Specifically, with a surface Ni/Cu ratio of 0.82 %, a 7-fold increase in the selectivity for C2 products was found in comparison with pristine Cu. Density functional theory calculations reveal that the rate determining step for *CO formation changes from the formation of *COOH on copper to the chemisorption of CO2 on Ni decorated surfaces. An alteration of binding sites from Ni-Ni bridge for *CO2 and *COOH to Ni-Cu bridge for *CO is discovered and is proposed to favor the key C-C coupling step. The catalytic mechanism demonstrated in the Cu-Ni system points to the new directions for the development of advanced bimetallic electrocatalysts for producing multi-carbon materials from CO2 reduction.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available