The structure-dependent enhancement of the oxygen reduction reaction performance of Co-based low Pt catalysts through Au addition

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Title:	The structure-dependent enhancement of the oxygen reduction reaction performance of Co-based low Pt catalysts through Au addition
Authors:	王冠文;Lin, Zi-Jun;Chou, Tsung-Fu;Liu, Chen-Wei;Huang, Po-Hsiang;Guo, Yao-Zhang;Wang, Jeng-Han;Wang, Kuan-Wen
Contributors:	工學院材料科學與工程研究所
Keywords:	Catalysis;Catalysts;Cobalt base alloys;density functional theory;Durability;electrochemistry;gold;Intermetallics;Platinum;Platinum compounds;protonation;Reduction;shrinkage
Date:	2016-01-01
Issue Date:	2026-04-23 11:48:19 (UTC+8)
Publisher:	Royal Society of Chemistry
Abstract:	摘要： In this study, we have investigated the oxygen reduction reaction (ORR) activity and durability of Co-based catalysts mechanistically. CoPt/C catalysts with a Pt loading of 7 wt% and Au modification have been prepared and shown excellent ORR performance. The various as-prepared CoPt/C and CoPtAu/C catalysts have about 2.6-9.2 times higher mass activity than commercial Pt/C. The mechanistic insight obtained by density functional theory calculations has shown that the enhanced activity is attributable to the fact that Co-based catalysts can easily dissociate surface O 2 * without the high-barrier protonation step and efficiently remove the dissociated O*. The improved stability, 1000 th decay = 14.6%, corresponds to the fact that the core Au can resist the shrinkage of surface Pt during the accelerated durability test. Au in the inner core of CoPt/C can effectively stabilize its structure during the stability test of the oxygen reduction reaction. 出版日期： 2016-01-01 出處： Journal of materials chemistry. A, Materials for energy and sustainability, 2016-01, Vol.4 (28), p.1123-1129 資源來源： Royal Society of Chemistry 識別號： ISSN: 2050-7488 識別號： ISSN: 2050-7496 識別號： EISSN: 2050-7496 識別號： DOI: 10.1039/c6ta04154j
Appears in Collections:	[Institute of Materials Science and Engineering] journal & Dissertation

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