Size Effect of Atomic Gold Clusters for Carbon Monoxide Passivation at Rucore-Ptshell Nanocatalysts

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題名:	Size Effect of Atomic Gold Clusters for Carbon Monoxide Passivation at Rucore-Ptshell Nanocatalysts
作者:	王冠文;Chen, Tsan-Yao;Liu, Yu-Ting;Wang, Jeng Han;Lee, Guo-Wei;Yang, Po-Wei;Wang, Kuan-Wen
貢獻者:	工學院材料科學與工程研究所
關鍵詞:	carbon monoxide;catalysts;chemical analysis;durability;fuel cells;gold;ligands;nanoparticles;oxidation;platinum;poisoning;polyols;sorption
日期:	2016-04-21
上傳時間:	2026-04-23 11:44:52 (UTC+8)
出版者:	American Chemical Society
摘要:	摘要： The surface of Ptshell–Rucore nanocatalysts was modified with an atomic-scaled Au cluster of different sizes by a polyol reduction technique using sequence and composition control. Our results, combining the structure, surface chemical analysis, and density functional theory calculation, elucidate that these clusters reduced the oxidation current of carbon monoxide to a maximum extent of ∼53%; consequently, the anti-CO poisoning factor of the NCs was doubled by increasing the Au/Pt ratios from 0 to 15 at%. Such substantial improvement is caused by steric shielding and the electron localization field that reject the sorption of electronegative ligands/molecules at the NC surface by Au clusters. Most importantly, this work clarifies the mechanistic insights of the charge relocation at core–shell nanoparticles by subnanoscaled cluster intercalation and the impacts of cluster size for the chemical durability of catalysts in fuel cell applications. 其他題名： J. Phys. Chem. C 出版者： American Chemical Society 出版日期： 2016-04-14 出處： Journal of physical chemistry. C, 2016-04, Vol.120 (14), p.7621-7628 資源來源： American Chemical Society Journals 版權： Copyright © 2016 American Chemical Society 識別號： ISSN: 1932-7447 識別號： ISSN: 1932-7455 識別號： EISSN: 1932-7455 識別號： DOI: 10.1021/acs.jpcc.6b00801
顯示於類別:	[材料科學與工程研究所 ] 期刊論文

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