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.
原文 | 英語 |
---|---|
頁(從 - 到) | 17848-17856 |
頁數 | 9 |
期刊 | Journal of Materials Chemistry A |
卷 | 4 |
發行號 | 45 |
DOIs | |
出版狀態 | 已發佈 - 2016 |
對外發佈 | 是 |
ASJC Scopus subject areas
- 一般化學
- 可再生能源、永續發展與環境
- 一般材料科學