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Two-Dimensional Conductive Ni-HAB as a Catalyst for the Electrochemical Oxygen Reduction Reaction.
Park, Jihye; Chen, Zhihua; Flores, Raul A; Wallnerström, Gustaf; Kulkarni, Ambarish; Nørskov, Jens K; Jaramillo, Thomas F; Bao, Zhenan.
Afiliação
  • Park J; Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States.
  • Chen Z; Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States.
  • Flores RA; SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States.
  • Wallnerström G; Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States.
  • Kulkarni A; SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States.
  • Nørskov JK; Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States.
  • Jaramillo TF; Department of Chemical Engineering, KTH Royal Institute of Technology, Stockholm 100 44, Sweden.
  • Bao Z; Department of Chemical Engineering, University of California Davis, 1 Shields Avenue, Davis, California 95616, United States.
ACS Appl Mater Interfaces ; 12(35): 39074-39081, 2020 Sep 02.
Artigo em Inglês | MEDLINE | ID: mdl-32805928
ABSTRACT
Catalytic systems whose properties can be systematically tuned via changes in synthesis conditions are highly desirable for the next-generation catalyst design and optimization. Herein, we present a two-dimensional (2D) conductive metal-organic framework consisting of M-N4 units (M = Ni, Cu) and a hexaaminobenzene (HAB) linker as a catalyst for the oxygen reduction reaction. By varying synthetic conditions, we prepared two Ni-HAB catalysts with different crystallinities, resulting in catalytic systems with different electric conductivities, electrochemical activity, and stability. We show that crystallinity has a positive impact on conductivity and demonstrate that this improved crystallinity/conductivity improves the catalytic performance of our model system. Additionally, density functional theory simulations were performed to probe the origin of M-HAB's catalytic activity, and they suggest that M-HAB's organic linker acts as the active site with the role of the metal being to modulate the linker sites' binding strength.
Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Idioma: Inglês Revista: ACS Appl Mater Interfaces Assunto da revista: Biotecnologia / Engenharia Biomédica Ano de publicação: 2020 Tipo de documento: Artigo País de afiliação: Estados Unidos

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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Idioma: Inglês Revista: ACS Appl Mater Interfaces Assunto da revista: Biotecnologia / Engenharia Biomédica Ano de publicação: 2020 Tipo de documento: Artigo País de afiliação: Estados Unidos