Promotion of oxygen reduction reaction durability of carbon-supported PtAu catalysts by surface segregation and TiO2 addition

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Title:	Promotion of oxygen reduction reaction durability of carbon-supported PtAu catalysts by surface segregation and TiO2 addition
Authors:	王冠文;Liu, Chen-Wei;Chen, Hong-Shuo;Lai, Chien-Ming;Lin, Jiunn-Nan;Tsai, Li-Duan;Wang, Kuan-Wen
Contributors:	工學院材料科學與工程研究所
Keywords:	air;carbon;catalysts;durability;electrochemistry;heat treatment;hydrogen;oxygen;surface area;titanium dioxide
Date:	2014-02-12
Issue Date:	2026-04-23 11:42:45 (UTC+8)
Publisher:	American Chemical Society;United States: American Chemical Society
Abstract:	摘要： Highly effective carbon supported-Pt75Au25 catalysts for oxygen reduction reaction (ORR) are prepared though titanium dioxide modification and post heat treatment. After accelerated durability test (ADT) of 1700 cycles, the ORR activity of PtAu/C catalysts modified by TiO2 and air heat treatment is 3 times higher than that of the commercial Pt/C. The enhancement of ORR activity is attributed to surface and structural alteration by air-induced Pt surface segregation and lower unfilled d states. On the contrary, for TiO2 modified and H2 treated PtAu/C catalysts, the deterioration of the ORR activity may be due to the loss of electrochemical surface area after ADT and the increase of d-band vacancy. 其他題名： ACS Appl. Mater. Interfaces 出版者： United States: American Chemical Society 出版日期： 2014-02-12 出處： ACS applied materials & interfaces, 2014-02, Vol.6 (3), p.1589-1594 資源來源： American Chemical Society Journals 版權： Copyright © 2014 American Chemical Society 識別號： ISSN: 1944-8244 識別號： ISSN: 1944-8252 識別號： EISSN: 1944-8252 識別號： DOI: 10.1021/am404334k 識別號： PMID: 24447040
Appears in Collections:	[Institute of Materials Science and Engineering] journal & Dissertation

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