Local heterojunctions of atomic Pt clusters boost the oxygen reduction activity of Rucore@Pdshell nanocrystallites

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Title:	Local heterojunctions of atomic Pt clusters boost the oxygen reduction activity of Rucore@Pdshell nanocrystallites
Authors:	王冠文;Wang, Jeng Han;Wang, Kuan-Wen;Chen, Tian-Lin;Wang, Chia-Hsin;Huang, Yu-Ming;Hsu, Yang-Yang;Chen, Tsan-Yao
Contributors:	工學院材料科學與工程研究所
Date:	2016-01-01
Issue Date:	2026-04-23 11:38:13 (UTC+8)
Publisher:	Royal Society of Chemistry
Abstract:	摘要： Ru-Pd nanoparticles (NPs) with Pt atomic cluster modification were synthesized using polyol reactions with a sequence design. Such modification resulted in the formation of Ru in the inner core and Pd on the outer shell structure (Rucore-Pdshell) via transmetalation between the Pt ion and Pd atom followed by thermal reduction. The Pt modified Rucore-Pdshell NPs improve the on-set potential by 0.041 volt and reduce Pt loading to less than ∼2%, as compared with that of carbon supported Pt NPs. For the optimum case, the MA (current degradation) of Ru-Pd NPs is improved (suppressed) by ∼345% (18.1%) in the accelerated degradation test (ADT) at 0.85 volt ( vs. RHE) for 5000 cycles by intercalating Pt clusters (2 to 9 at%) in the NP surface. These improvements are attributed to the electron localization and reinforcement by surface Pt clusters, which facilitated the oxygen reduction activity and chemical durability of NPs. Atomic scale Pt clusters attract the valence electron from sublayer crystallites to facilitate oxygen reduction kinetics at core-shell NPs. 出版日期： 2016-11-15 資源來源： Royal Society of Chemistry 識別號： ISSN: 2050-7488 識別號： EISSN: 2050-7496 識別號： DOI: 10.1039/c6ta06995a
Appears in Collections:	[Institute of Materials Science and Engineering] journal & Dissertation

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