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Liquid Metal-Enabled Tunable Synthesis of Nanoporous Polycrystalline Copper for Selective CO2-to-Formate Electrochemical Conversion.
Zhong, Wenyu; Chi, Yuan; Yu, Ruohan; Kong, Charlie; Zhou, Shujie; Han, Chen; Vongsvivut, Jitraporn; Mao, Guangzhao; Kalantar-Zadeh, Kourosh; Amal, Rose; Tang, Jianbo; Lu, Xunyu.
Afiliación
  • Zhong W; School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia.
  • Chi Y; School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia.
  • Yu R; School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia.
  • Kong C; Electron Microscope Unit, University of New South Wales, Sydney, NSW, 2052, Australia.
  • Zhou S; School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia.
  • Han C; School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia.
  • Vongsvivut J; Infrared Microspectroscopy (IRM) Beamline, ANSTO-Australian Synchrotron, Clayton, VIC, 3168, Australia.
  • Mao G; School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia.
  • Kalantar-Zadeh K; School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia.
  • Amal R; School of Chemical and Biomolecular Engineering, University of Sydney, Darlington, NSW, 2008, Australia.
  • Tang J; School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia.
  • Lu X; School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia.
Small ; : e2403939, 2024 Jul 30.
Article en En | MEDLINE | ID: mdl-39078016
ABSTRACT
Copper-based catalysts exhibit high activity in electrochemical CO2 conversion to value-added chemicals. However, achieving precise control over catalysts design to generate narrowly distributed products remains challenging. Herein, a gallium (Ga) liquid metal-based approach is employed to synthesize hierarchical nanoporous copper (HNP Cu) catalysts with tailored ligament/pore and crystallite sizes. The nanoporosity and polycrystallinity are generated by dealloying intermetallic CuGa2 formed after immersing pristine Cu foil in liquid Ga in a basic or acidic solution. The liquid metal-based approach allows for the transformation of monocrystalline Cu to the polycrystalline HNP Cu with enhanced CO2 reduction reaction (CO2RR) performance. The dealloyed HNP Cu catalyst with suitable crystallite size (22.8 nm) and nanoporous structure (ligament/pore size of 45 nm) exhibits a high Faradaic efficiency of 91% toward formate production under an applied potential as low as -0.3 VRHE. The superior CO2RR performance can be ascribed to the enlarged electrochemical catalytic surface area, the generation of preferred Cu facets, and the rich grain boundaries by polycrystallinity. This work demonstrates the potential of liquid metal-based synthesis for improving catalysts performance based on structural design, without increasing compositional complexity.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Small Asunto de la revista: ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Alemania
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Small Asunto de la revista: ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Alemania