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Self-Interface in Rh Nanosheets-Supported Tetrahedral Rh Nanocrystals for Promoting Electrocatalytic Oxidation of Ethanol.
Cheng, Tianchun; Tian, Jinshu; Du, Jiafeng; Wang, Zhi; Ye, Jinyu; Liu, Aihua; Chen, Qiaoli; Zhu, Yihan.
Afiliação
  • Cheng T; College of Chemical Engineering and State Key Laboratory Breeding Base of Green Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou, Zhejiang, 310014, China.
  • Tian J; College of Chemical Engineering and State Key Laboratory Breeding Base of Green Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou, Zhejiang, 310014, China.
  • Du J; College of Chemical and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China.
  • Wang Z; College of Chemical Engineering and State Key Laboratory Breeding Base of Green Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou, Zhejiang, 310014, China.
  • Ye J; College of Chemical and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China.
  • Liu A; College of Chemical Engineering and State Key Laboratory Breeding Base of Green Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou, Zhejiang, 310014, China.
  • Chen Q; College of Chemical Engineering and State Key Laboratory Breeding Base of Green Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou, Zhejiang, 310014, China.
  • Zhu Y; College of Chemical Engineering and State Key Laboratory Breeding Base of Green Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou, Zhejiang, 310014, China.
Small ; 20(7): e2306221, 2024 Feb.
Article em En | MEDLINE | ID: mdl-37803408
ABSTRACT
Direct ethanol fuel cells hold great promise as a power source. However, their commercialization is limited by anode catalysts with insufficient selectivity toward a complete oxidation of ethanol for a high energy density, as well as sluggish catalytic kinetics and low stability. To optimize the catalytic performance, rationally tuning surface structure or interface structure is highly desired. Herein, a facile route is reported to the synthesis of Rh nanosheets-supported tetrahedral Rh nanocrystals (Rh THs/NSs), which possess self-supporting homogeneous interface between Rh tetrahedrons and Rh nanosheets. Due to full leverage of the structural advantages within the given structure and construction of interfaces, the Rh THs/NSs can serve as highly active electro-catalysts with excellent mass activity and selectivity toward ethanol electro-oxidation. The in situ Fourier transform infrared reflection spectroscopy showed the Rh THs/NSs exhibit the highest C1 pathway selectivity of 23.2%, far exceeding that of Rh nanotetrahedra and Rh nanosheets. Density function theory calculations further demonstrated that self-interface between Rh nanosheets and tetrahedra is beneficial for C-C bond cleavage of ethanol. Meanwhile, the self-supporting of 2D nanosheets greatly enhance the stability of tetrahedra, which improves the catalytic stability.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2024 Tipo de documento: Article