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Co3 O4 @Cu-Based Conductive Metal-Organic Framework Core-Shell Nanowire Electrocatalysts Enable Efficient Low-Overall-Potential Water Splitting.
Hu, Lei; Xiong, Tuzhi; Liu, Ran; Hu, Yuwen; Mao, Yanchao; Balogun, M-Sadeeq Jie Tang; Tong, Yexiang.
Afiliação
  • Hu L; MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-Carbon Chemistry & Energy Conservation of, Guangdong Province, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, P. R. China.
  • Xiong T; College of Materials Science and Engineering, Hunan University, Changsha, 410082, Hunan, P. R. China.
  • Liu R; Division of Engineering Science, Faculty of Applied Science & Engineering, University of Toronto, St. George (Downtown Toronto) Campus, 27 King's College Cir, M5S, Toronto, ON, Canada.
  • Hu Y; MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-Carbon Chemistry & Energy Conservation of, Guangdong Province, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, P. R. China.
  • Mao Y; MOE Key Laboratory of Materials Physics, School of Physics & Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China.
  • Balogun MJT; College of Materials Science and Engineering, Hunan University, Changsha, 410082, Hunan, P. R. China.
  • Tong Y; MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-Carbon Chemistry & Energy Conservation of, Guangdong Province, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, P. R. China.
Chemistry ; 25(26): 6575-6583, 2019 May 07.
Article em En | MEDLINE | ID: mdl-30892755
In the work reported herein, the electrocatalytic properties of Co3 O4 in hydrogen and oxygen evolution reactions have been significantly enhanced by coating a shell layer of a copper-based metal-organic framework on Co3 O4 porous nanowire arrays and using the products as high-performance bifunctional electrocatalysts for overall water splitting. The coating of the copper-based metal-organic framework resulted in the hybridization of the copper-embedded protective carbon shell layer with Co3 O4 to create a strong Cu-O-Co bonding interaction for efficient hydrogen adsorption. The hybridization also led to electronically induced oxygen defects and nitrogen doping to effectively enhance the electrical conductivity of Co3 O4 . The optimal as-prepared core-shell hybrid material displayed excellent overall-water-splitting catalytic activity that required overall voltages of 1.45 and 1.57 V to reach onset and a current density of 10 mA cm-2 , respectively. This is the first report to highlight the relevance of hybridizing MOF-based co-catalysts to boost the electrocatalytic performance of nonprecious transition-metal oxides.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2019 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2019 Tipo de documento: Article