Core dominated surface activity of core-shell nanocatalysts on methanol electrooxidation

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題名:	Core dominated surface activity of core-shell nanocatalysts on methanol electrooxidation
作者:	王冠文;Chen, Tsan-Yao;Luo, Tzy-Jiun Mark;Yang, Yaw-Wen;Wei, Yu-Chen;Wang, Kuan-Wen;Lin, Tsang-Lang;Wen, Ten-Chin;Lee, Chih Hao
貢獻者:	工學院材料科學與工程研究所
關鍵詞:	Applied sciences;Chemistry;Condensed matter: structure, mechanical and thermal properties;Cross-disciplinary physics: materials science;rheology;Direct energy conversion and energy accumulation;Electrical engineering. Electrical power engineering;Electrical power engineering;Electrochemical conversion: primary and secondary batteries, fuel cells;Exact sciences and technology;General and physical chemistry;General, apparatus;Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties;Materials science;Nanocrystalline materials;Nanoscale materials and structures: fabrication and characterization;Physics;Surface physical chemistry;Surfaces and interfaces;thin films and whiskers (structure and nonelectronic properties)
日期:	2012-08-16
上傳時間:	2026-04-23 11:29:53 (UTC+8)
出版者:	American Chemical Society;Columbus, OH: American Chemical Society
摘要:	摘要： The activity of core–shell nanoparticles (NCs) in electrooxidation of methanol (MOR) was found to be dependent on the crystalline structure of the core and the lattice strain at the core–shell interface. Ru-core and Pt-shell NCs delivered 6.1-fold peak MOR current density at −135 mV than Pt NCs, while the Co-core and Pt-shell NCs showed a 1.4-fold peak MOR current density at 280 mV. The current density is improved by the compressive lattice strain of the surface that is caused by the lattice mismatch between the Pt shell and the Ru core. For Co-core NCs, the enhancement results from the ligand effect at surface Pt sites. In addition, the Ru-core NCs maintained a steady current density of 0.11 mA cm–2 at 500 mV in a half-cell system for 2 h, which is 100-fold higher than that of Pt NCs and Co-core NCs. These results provide mechanistic information for the development of fuel cell catalysts along with reduced Pt utilization and programmable electrochemical performance. 其他題名： J. Phys. Chem. C 出版者： Columbus, OH: American Chemical Society 出版日期： 2012-08-16 出處： Journal of physical chemistry. C, 2012-08, Vol.116 (32), p.16969-16978 資源來源： American Chemical Society (ACS) Journals 版權： Copyright © 2012 American Chemical Society 版權： 2015 INIST-CNRS 識別號： ISSN: 1932-7447 識別號： EISSN: 1932-7455 識別號： DOI: 10.1021/jp3017419
顯示於類別:	[材料科學與工程研究所 ] 期刊論文

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