Your browser doesn't support javascript.
loading
Designing Boron Nitride Islands in Carbon Materials for Efficient Electrochemical Synthesis of Hydrogen Peroxide.
Chen, Shucheng; Chen, Zhihua; Siahrostami, Samira; Higgins, Drew; Nordlund, Dennis; Sokaras, Dimosthenis; Kim, Taeho Roy; Liu, Yunzhi; Yan, Xuzhou; Nilsson, Elisabeth; Sinclair, Robert; Nørskov, Jens K; Jaramillo, Thomas F; Bao, Zhenan.
Afiliação
  • Chen S; SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering , Stanford University , Stanford , California 94305 , United States.
  • Chen Z; SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering , Stanford University , Stanford , California 94305 , United States.
  • Siahrostami S; SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering , Stanford University , Stanford , California 94305 , United States.
  • Higgins D; SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering , Stanford University , Stanford , California 94305 , United States.
  • Nordlund D; Stanford Synchrotron Radiation Light Source , SLAC National Accelerator Laboratory , Menlo Park , California 94025 , United States.
  • Sokaras D; Stanford Synchrotron Radiation Light Source , SLAC National Accelerator Laboratory , Menlo Park , California 94025 , United States.
  • Kim TR; Department of Materials Science and Engineering , Stanford University , Stanford , California 94305 , United States.
  • Liu Y; Department of Materials Science and Engineering , Stanford University , Stanford , California 94305 , United States.
  • Yan X; SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering , Stanford University , Stanford , California 94305 , United States.
  • Nilsson E; SUNCAT Center for Interface Science and Catalysis , SLAC National Accelerator Laboratory , Menlo Park , California 94025 , United States.
  • Sinclair R; Department of Materials Science and Engineering , Stanford University , Stanford , California 94305 , United States.
  • Nørskov JK; SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering , Stanford University , Stanford , California 94305 , United States.
  • Jaramillo TF; SUNCAT Center for Interface Science and Catalysis , SLAC National Accelerator Laboratory , Menlo Park , California 94025 , United States.
  • Bao Z; SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering , Stanford University , Stanford , California 94305 , United States.
J Am Chem Soc ; 140(25): 7851-7859, 2018 06 27.
Artigo em Inglês | MEDLINE | ID: mdl-29874062
ABSTRACT
Heteroatom-doped carbons have drawn increasing research interest as catalysts for various electrochemical reactions due to their unique electronic and surface structures. In particular, co-doping of carbon with boron and nitrogen has been shown to provide significant catalytic activity for oxygen reduction reaction (ORR). However, limited experimental work has been done to systematically study these materials, and much remains to be understood about the nature of the active site(s), particularly with regards to the factors underlying the activity enhancements of these boron-carbon-nitrogen (BCN) materials. Herein, we prepare several BCN materials experimentally with a facile and controlled synthesis method, and systematically study their electrochemical performance. We demonstrate the existence of h-BN domains embedded in the graphitic structures of these materials using X-ray spectroscopy. These synthesized structures yield higher activity and selectivity toward the 2e- ORR to H2O2 than structures with individual B or N doping. We further employ density functional theory calculations to understand the role of a variety of h-BN domains within the carbon lattice for the ORR and find that the interface between h-BN domains and graphene exhibits unique catalytic behavior that can preferentially drive the production of H2O2. To the best of our knowledge, this is the first example of h-BN domains in carbon identified as a novel system for the electrochemical production of H2O2.
Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Idioma: Inglês Revista: J Am Chem Soc Ano de publicação: 2018 Tipo de documento: Artigo País de afiliação: Estados Unidos

Similares

MEDLINE

...
LILACS

LIS

Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Idioma: Inglês Revista: J Am Chem Soc Ano de publicação: 2018 Tipo de documento: Artigo País de afiliação: Estados Unidos
...