Journal article
Molecular Coatings Improve the Selectivity and Durability of CO2 Reduction Chalcogenide Photocathodes
ACS energy letters, v 7(3), pp 1195-1201
11 Mar 2022
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The quest for solar-driven conversion of carbon dioxide to chemicals and fuels hinges upon the identification of an efficient, durable, and selective photocathode. Chalcogenide p-type semiconductors exemplified by chalcopyrite Cu(In,Ga)Se-2 (GIGS) have been effectively deployed as photocathodes. However, selectivity toward CO2 reduction and durability of the commonly used CdS adlayer remain primary challenges. Here, we demonstrate that for the wide band gap CuGa3Se5 chalcopyrite absorber these challenges are well addressed by an organic coating generated in situ from an N,N'-(1,4-phenylene)bispyridinium ditriflate salt in the electrolyte. The molecular additive provides a 30-fold increase in selectivity toward CO2R products compared to the unmodified system and lowers Cd corrosion at least 10-fold. This dual functionality highlights the promise of hybrid solid-state-molecular photocathodes for enabling durable and efficient solar fuel systems.
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Details
- Title
- Molecular Coatings Improve the Selectivity and Durability of CO2 Reduction Chalcogenide Photocathodes
- Creators
- Yungchieh Lai - California Institute of TechnologyNicholas B. Watkins - California Institute of TechnologyChristopher Muzzillo - National Laboratory of the RockiesMatthias Richter - California Institute of TechnologyKevin Kan - California Institute of TechnologyLan Zhou - California Institute of TechnologyJoel A. Haber - California Institute of TechnologyAndriy Zakutayev - National Laboratory of the RockiesJonas C. Peters - California Institute of TechnologyTheodor Agapie - California Institute of TechnologyJohn M. Gregoire - California Institute of TechnologyNational Renewable Energy Lab. (NREL), Golden, CO (United States)
- Publication Details
- ACS energy letters, v 7(3), pp 1195-1201
- Publisher
- Amer Chemical Soc
- Number of pages
- 7
- Grant note
- DEAC36-08GO28308 / U.S. Department of Energy (DOE); United States Department of Energy (DOE) DESC0021266 / U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Fuels from Sunlight Hub; United States Department of Energy (DOE)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- A.J. Drexel Nanomaterials Institute
- Web of Science ID
- WOS:000772171700032
- Scopus ID
- 2-s2.0-85126137458
- Other Identifier
- 991022207076904721
UN Sustainable Development Goals (SDGs)
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Source: SDGs in the Output
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Chemistry, Physical
- Electrochemistry
- Energy & Fuels
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology