Journal article
Organic Additive‐derived Films on Cu Electrodes Promote Electrochemical CO2 Reduction to C2+ Products Under Strongly Acidic Conditions
Angewandte Chemie International Edition, v 62(12), pp e202216102-n/a
13 Mar 2023
PMID: 36656130
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Electrochemical CO2 reduction (CO2R) at low pH is desired for high CO2 utilization; the competing hydrogen evolution reaction (HER) remains a challenge. High alkali cation concentration at a high operating current density has recently been used to promote electrochemical CO2R at low pH. Herein we report an alternative approach to selective CO2R (>70 % Faradaic efficiency for C2+ products, FEC2+) at low pH (pH 2; H3PO4/KH2PO4) and low potassium concentration ([K+]=0.1 M) using organic film‐modified polycrystalline copper (Modified‐Cu). Such an electrode effectively mitigates HER due to attenuated proton transport. Modified‐Cu still achieves high FEC2+ (45 % with Cu foil /55 % with Cu GDE) under 1.0 M H3PO4 (pH≈1) at low [K+] (0.1 M), even at low operating current, conditions where HER can otherwise dominate. Modified copper electrodes with N‐tolyl pyridinium additive‐derived films show boosted selectivity of the CO2 reduction to C2+ products (>70 % Faradaic efficiency) and great suppression of the hydrogen evolution reaction in strongly acidic electrolytes with low alkali cation concentrations.
Metrics
1 Record Views
Details
- Title
- Organic Additive‐derived Films on Cu Electrodes Promote Electrochemical CO2 Reduction to C2+ Products Under Strongly Acidic Conditions
- Creators
- Weixuan Nie - California Institute of TechnologyGavin P. Heim - California Institute of TechnologyNicholas B. Watkins - California Institute of TechnologyTheodor Agapie - California Institute of TechnologyJonas C. Peters - California Institute of TechnologyCalifornia Institute of Technology (CalTech), Pasadena, CA (United States)
- Publication Details
- Angewandte Chemie International Edition, v 62(12), pp e202216102-n/a
- Number of pages
- 7
- Grant note
- Basic Energy Sciences (DE-SC0021266)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- A.J. Drexel Nanomaterials Institute
- Web of Science ID
- WOS:000929023200001
- Scopus ID
- 2-s2.0-85147524973
- Other Identifier
- 991022207179004721
UN Sustainable Development Goals (SDGs)
This publication has contributed to the advancement of the following goals:
Source: SDGs in the Output
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
Highly Cited Paper
- Web of Science research areas
- Chemistry, Multidisciplinary