The structure-dependent enhancement of the oxygen reduction reaction performance of Co-based low Pt catalysts through Au addition. Issue 28 (1st July 2016)

• Record Type: Journal Article
• Authors: Lin, Zi-Jun; Chou, Tsung-Fu; Liu, Chen-Wei; Huang, Po-Hsiang; Guo, Yao-Zhang; Wang, Jeng-Han; Wang, Kuan-Wen
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 28(2016)
• Page Start: 11023
• Page End: 11029
• Publication Date: 2016-07-01
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6ta04154j
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Au in the inner core of CoPt/C can effectively stabilize its structure during the stability test of the oxygen reduction reaction. Abstract : 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 O2 * 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.