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Interfacial and Vacancy Engineering on 3D-Interlocked Anode Catalyst Layer for Achieving Ultralow Voltage in Anion Exchange Membrane Water Electrolyzer.
Wan, Lei; Lin, Dongcheng; Liu, Jing; Xu, Ziang; Xu, Qin; Zhen, Yihan; Pang, Maobin; Wang, Baoguo.
Afiliación
  • Wan L; Department of Chemical Engineering, Tsinghua University, Beijing, China, 100084.
  • Lin D; Department of Chemical Engineering, Tsinghua University, Beijing, China, 100084.
  • Liu J; Department of Chemical Engineering, Tsinghua University, Beijing, China, 100084.
  • Xu Z; Department of Chemical Engineering, Tsinghua University, Beijing, China, 100084.
  • Xu Q; Department of Chemical Engineering, Tsinghua University, Beijing, China, 100084.
  • Zhen Y; Department of Chemical Engineering, Tsinghua University, Beijing, China, 100084.
  • Pang M; Department of Chemical Engineering, Tsinghua University, Beijing, China, 100084.
  • Wang B; Department of Chemical Engineering, Tsinghua University, Beijing, China, 100084.
ACS Nano ; 18(34): 22901-22916, 2024 Aug 27.
Article en En | MEDLINE | ID: mdl-39137066
ABSTRACT
Developing a high-efficiency and stable anode catalyst layer (CL) is crucial for promoting the practical applications of anion exchange membrane (AEM) water electrolyzers. Herein, a hierarchical nanosheet array composed of oxygen vacancy-enriched CoCrOx nanosheets and dispersed FeNi layered double hydroxide (LDH) is proposed to regulate the electronic structure and increase the electrical conductivity for improving the intrinsic activity of the oxygen evolution reaction (OER). The CoCrOx/NiFe LDH electrodes require an overpotential of 205 mV to achieve a current density of 100 mA cm-2, and they exhibit long-term stability at 1000 mA cm-2 over 7000 h. Notably, a breakthrough strategy is introduced in membrane electrode assembly (MEA) fabrication by transferring CoCrOx/NiFe LDH to the surface of an AEM, forming a 3D-interlocked anode CL, significantly reducing the overall cell resistance and enhancing the liquid/gas mass transfer. In AEM water electrolysis, it exhibits an ultralow cell voltage of 1.55 Vcell to achieve a current density of 1.0 A cm-2 in 1 M KOH, outperforming the state-of-the-art Pt/C//IrO2. This work provides a valuable approach to designing high-efficiency electrocatalysts at the single-cell level for advanced alkaline water electrolysis technologies.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Nano Año: 2024 Tipo del documento: Article Pais de publicación: Estados Unidos
Texto completo
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XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Nano Año: 2024 Tipo del documento: Article Pais de publicación: Estados Unidos