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Molecular Additives Improve the Selectivity of CO2 Photoelectrochemical Reduction over Gold Nanoparticles on Gallium Nitride.
Aitbekova, Aisulu; Watkins, Nicholas; Richter, Matthias H; Jahelka, Phillip; Peters, Jonas C; Agapie, Theodor; Atwater, Harry A.
Afiliación
  • Aitbekova A; Applied Physics and Materials Science, California Institute of Technology, Pasadena, California 91125, United States.
  • Watkins N; Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States.
  • Richter MH; Division of Engineering and Applied Science, California Institute of Technology, Pasadena, California 91125, United States.
  • Jahelka P; Applied Physics and Materials Science, California Institute of Technology, Pasadena, California 91125, United States.
  • Peters JC; Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States.
  • Agapie T; Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States.
  • Atwater HA; Applied Physics and Materials Science, California Institute of Technology, Pasadena, California 91125, United States.
Nano Lett ; 24(4): 1090-1095, 2024 Jan 31.
Article en En | MEDLINE | ID: mdl-38230969
ABSTRACT
Photoelectrochemical CO2 reduction (CO2R) is an appealing solution for converting carbon dioxide into higher-value products. However, CO2R 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 CO2R.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nano Lett Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nano Lett Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos