Surface Oxide-Derived Nanoporous Gold Catalysts for Electrochemical CO2-to-CO Reduction
Abstract
Electrochemical CO2 reduction (ECR) has become a viable option as the cost of renewable energy continues to decrease. One of the major obstacles that prevents its widespread use is the lack of efficient ECR catalysts due to our only slowly emerging understanding of catalyst design. Here, we report on a surface oxide-derived nanoporous gold catalyst prepared by one-step electrochemical dealloying that shows an extremely low overpotential (Faradaic efficiency for CO exceeds 90%) of 0.185 V (–0.3 V vs RHE) for CO2-to-CO conversion in 0.1 M KHCO3 solution. Here, we demonstrate that surface oxide-derived nanoporous gold shows improved ECR performance with higher Faradaic efficiency compared to clean nanoporous gold which is the consequence of its smaller overpotential for CO2-to-CO reduction and simultaneous suppression of hydrogen evolution.
- Authors:
-
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Materials Science Division, Physical and Life Sciences Directorate
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1575859
- Report Number(s):
- LLNL-JRNL-767518
Journal ID: ISSN 2574-0962; 957442
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ACS Applied Energy Materials
- Additional Journal Information:
- Journal Volume: 2; Journal Issue: 11; Journal ID: ISSN 2574-0962
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; electrochemical CO2 reduction; nanoporous; dealloying; gold; electrocatalysis
Citation Formats
Qi, Zhen, Biener, Juergen, and Biener, Monika. Surface Oxide-Derived Nanoporous Gold Catalysts for Electrochemical CO2-to-CO Reduction. United States: N. p., 2019.
Web. doi:10.1021/acsaem.9b00355.
Qi, Zhen, Biener, Juergen, & Biener, Monika. Surface Oxide-Derived Nanoporous Gold Catalysts for Electrochemical CO2-to-CO Reduction. United States. https://doi.org/10.1021/acsaem.9b00355
Qi, Zhen, Biener, Juergen, and Biener, Monika. Mon .
"Surface Oxide-Derived Nanoporous Gold Catalysts for Electrochemical CO2-to-CO Reduction". United States. https://doi.org/10.1021/acsaem.9b00355. https://www.osti.gov/servlets/purl/1575859.
@article{osti_1575859,
title = {Surface Oxide-Derived Nanoporous Gold Catalysts for Electrochemical CO2-to-CO Reduction},
author = {Qi, Zhen and Biener, Juergen and Biener, Monika},
abstractNote = {Electrochemical CO2 reduction (ECR) has become a viable option as the cost of renewable energy continues to decrease. One of the major obstacles that prevents its widespread use is the lack of efficient ECR catalysts due to our only slowly emerging understanding of catalyst design. Here, we report on a surface oxide-derived nanoporous gold catalyst prepared by one-step electrochemical dealloying that shows an extremely low overpotential (Faradaic efficiency for CO exceeds 90%) of 0.185 V (–0.3 V vs RHE) for CO2-to-CO conversion in 0.1 M KHCO3 solution. Here, we demonstrate that surface oxide-derived nanoporous gold shows improved ECR performance with higher Faradaic efficiency compared to clean nanoporous gold which is the consequence of its smaller overpotential for CO2-to-CO reduction and simultaneous suppression of hydrogen evolution.},
doi = {10.1021/acsaem.9b00355},
journal = {ACS Applied Energy Materials},
number = 11,
volume = 2,
place = {United States},
year = {Mon Aug 26 00:00:00 EDT 2019},
month = {Mon Aug 26 00:00:00 EDT 2019}
}
Web of Science