Optical Excitation of a Nanoparticle Cu/p-NiO Photocathode Improves Reaction Selectivity for CO2 Reduction in Aqueous Electrolytes
Abstract
We report the light-induced modification of catalytic selectivity for photoelectrochemical CO2 reduction in aqueous media using copper (Cu) nanoparticles dispersed onto p-type nickel oxide (p-NiO) photocathodes. Optical excitation of Cu nanoparticles generates hot electrons available for driving CO2 reduction on the Cu surface, while charge separation is accomplished by hot-hole injection from the Cu nanoparticles into the underlying p-NiO support. Photoelectrochemical studies demonstrate that optical excitation of plasmonic Cu/p-NiO photocathodes imparts increased selectivity for CO2 reduction over hydrogen evolution in aqueous electrolytes. Specifically, we observed that plasmon-driven CO2 reduction increased the production of carbon monoxide and formate, while simultaneously reducing the evolution of hydrogen. Our results demonstrate an optical route toward steering the selectivity of artificial photosynthetic systems with plasmon-driven photocathodes for photoelectrochemical CO2 reduction in aqueous media.
- Authors:
-
[1];
[1];
[1];
[1]
- California Institute of Technology (CalTech), Pasadena, CA (United States)
- Publication Date:
- Research Org.:
- California Institute of Technology (CalTech), Pasadena, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1801628
- Grant/Contract Number:
- SC0004993
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nano Letters
- Additional Journal Information:
- Journal Volume: 20; Journal Issue: 4; Journal ID: ISSN 1530-6984
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; chemistry; materials science; physics; photonics; oxides; nanoparticles; plasmonics; inorganic carbon compounds; artificial photosynthesis; photoelectrochemistry; hot holes plasmonic photocathode; CO2 reduction
Citation Formats
DuChene, Joseph S., Tagliabue, Giulia, Welch, Alex J., Li, Xueqian, Cheng, Wen-Hui, and Atwater, Harry A. Optical Excitation of a Nanoparticle Cu/p-NiO Photocathode Improves Reaction Selectivity for CO2 Reduction in Aqueous Electrolytes. United States: N. p., 2020.
Web. doi:10.1021/acs.nanolett.9b04895.
DuChene, Joseph S., Tagliabue, Giulia, Welch, Alex J., Li, Xueqian, Cheng, Wen-Hui, & Atwater, Harry A. Optical Excitation of a Nanoparticle Cu/p-NiO Photocathode Improves Reaction Selectivity for CO2 Reduction in Aqueous Electrolytes. United States. https://doi.org/10.1021/acs.nanolett.9b04895
DuChene, Joseph S., Tagliabue, Giulia, Welch, Alex J., Li, Xueqian, Cheng, Wen-Hui, and Atwater, Harry A. Thu .
"Optical Excitation of a Nanoparticle Cu/p-NiO Photocathode Improves Reaction Selectivity for CO2 Reduction in Aqueous Electrolytes". United States. https://doi.org/10.1021/acs.nanolett.9b04895. https://www.osti.gov/servlets/purl/1801628.
@article{osti_1801628,
title = {Optical Excitation of a Nanoparticle Cu/p-NiO Photocathode Improves Reaction Selectivity for CO2 Reduction in Aqueous Electrolytes},
author = {DuChene, Joseph S. and Tagliabue, Giulia and Welch, Alex J. and Li, Xueqian and Cheng, Wen-Hui and Atwater, Harry A.},
abstractNote = {We report the light-induced modification of catalytic selectivity for photoelectrochemical CO2 reduction in aqueous media using copper (Cu) nanoparticles dispersed onto p-type nickel oxide (p-NiO) photocathodes. Optical excitation of Cu nanoparticles generates hot electrons available for driving CO2 reduction on the Cu surface, while charge separation is accomplished by hot-hole injection from the Cu nanoparticles into the underlying p-NiO support. Photoelectrochemical studies demonstrate that optical excitation of plasmonic Cu/p-NiO photocathodes imparts increased selectivity for CO2 reduction over hydrogen evolution in aqueous electrolytes. Specifically, we observed that plasmon-driven CO2 reduction increased the production of carbon monoxide and formate, while simultaneously reducing the evolution of hydrogen. Our results demonstrate an optical route toward steering the selectivity of artificial photosynthetic systems with plasmon-driven photocathodes for photoelectrochemical CO2 reduction in aqueous media.},
doi = {10.1021/acs.nanolett.9b04895},
journal = {Nano Letters},
number = 4,
volume = 20,
place = {United States},
year = {Thu Mar 05 00:00:00 EST 2020},
month = {Thu Mar 05 00:00:00 EST 2020}
}
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