Journal article
Molecular Additives Improve the Selectivity of CO 2 Photoelectrochemical Reduction over Gold Nanoparticles on Gallium Nitride
Nano letters, v 24(4), pp 1090-1095
17 Jan 2024
PMID: 38230969
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Photoelectrochemical CO
reduction (CO
R) is an appealing solution for converting carbon dioxide into higher-value products. However, CO
R in aqueous electrolytes suffers from poor selectivity due to the competitive hydrogen evolution reaction that is dominant on semiconductor surfaces in aqueous electrolytes. We demonstrate that functionalizing gold/p-type gallium nitride devices with a film derived from diphenyliodonium triflate suppresses hydrogen generation from 90% to 18%. As a result, we observe increases in the Faradaic efficiency and partial current density for carbon monoxide of 50% and 3-fold, respectively. Furthermore, we demonstrate through optical absorption measurements that the molecular film employed herein, regardless of thickness, does not affect the photocathode's light absorption. Altogether, this study provides a rigorous platform for elucidating the catalytic structure-property relationships to enable engineering of active, stable, and selective materials for photoelectrochemical CO
R.
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Details
- Title
- Molecular Additives Improve the Selectivity of CO 2 Photoelectrochemical Reduction over Gold Nanoparticles on Gallium Nitride
- Creators
- Aisulu Aitbekova - California Institute of TechnologyNicholas Watkins - California Institute of TechnologyMatthias H Richter - California Institute of TechnologyPhillip Jahelka - California Institute of TechnologyJonas C Peters - California Institute of TechnologyTheodor Agapie - California Institute of TechnologyHarry A Atwater - California Institute of TechnologyCalifornia Institute of Technology (CalTech), Pasadena, CA (United States)
- Publication Details
- Nano letters, v 24(4), pp 1090-1095
- Publisher
- AMER CHEMICAL SOC; WASHINGTON
- Number of pages
- 6
- Grant note
- Basic Energy Sciences: DE-SC0021266 U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Fuels from Sunlight Hub Resnick Sustainability Institute Kavli Nanoscience Institute Postdoctoral Fellowship
This material is based on work performed by the Liquid Sunlight Alliance, which is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Fuels from Sunlight Hub, under Grant DE-SC0021266. Part of this work was carried out at the Molecular Materials Research Center in the Beckman Institute of the California Institute of Technology. The Resnick Sustainability Institute is acknowledged for support of enabling facilities at Caltech. The authors thank Yungchieh Lai for performing ICP-MS measurements and Azhar Carim for helping collect cross-sectional SEM data. A.A. acknowledges support from the Kavli Nanoscience Institute Postdoctoral Fellowship.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- A.J. Drexel Nanomaterials Institute
- Web of Science ID
- WOS:001155510800001
- Other Identifier
- 991022207177804721
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Source: SDGs in the Output
InCites Highlights
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- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied
- Physics, Condensed Matter