Issue 45, 2016
From the journal:

Journal of Materials Chemistry A

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

Jeng Han Wang,a   Kuan-Wen Wang,*b   Tian-Lin Chen,a   Chia-Hsin Wang,c   Yu-Ming Huang,d   Yang-Yang Hsud  and  Tsan-Yao Chen*de  

* Corresponding authors

a Department of Engineering and System Science, National Tsing Hua University, Hsinchu 30013, Taiwan

b Institute of Nuclear Engineering and Science, National Tsing Hua University, Hsinchu 30013, Taiwan

c Department of Chemistry, National Taiwan Normal University, Taipei 106, Taiwan

d Institute of Materials Science and Engineering, National Central University, Taiwan
E-mail: chencaeser@gmail.com
Tel: +886 3 5715131 ext. 34271

e National Synchrotron Radiation Research Center, Hsinchu 30013, Taiwan

Abstract

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.

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

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Article information

DOI
https://doi.org/10.1039/C6TA06995A
Article type
Paper
Submitted
15 Aug 2016
Accepted
31 Oct 2016
First published
04 Nov 2016

J. Mater. Chem. A, 2016,4, 17848-17856

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

J. H. Wang, K. Wang, T. Chen, C. Wang, Y. Huang, Y. Hsu and T. Chen, J. Mater. Chem. A, 2016, 4, 17848 DOI: 10.1039/C6TA06995A

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