Pd-induced Pt(IV) reduction to form Pd@Pt/CNT core@shell catalyst for a more complete oxygen reduction

Meirong Xia; Ying Liu; Zidong Wei; Siguo Chen; Kun Xiong; Li Li; Wei Ding; Jinsong Hu; Li-Jun Wan; Rong Li; Shahnaz Fatima Alvia

doi:10.1039/C3TA13139D

Pd-induced Pt(iv) reduction to form Pd@Pt/CNT core@shell catalyst for a more complete oxygen reduction†

Meirong Xia,^a Ying Liu,^a Zidong Wei,*^a Siguo Chen,^a Kun Xiong,^a Li Li,^a Wei Ding,^a Jinsong Hu,^b Li-Jun Wan,*^b Rong Li^a and Shahnaz Fatima Alvia^a

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* Corresponding authors

^a The State Key Laboratory of Power Transmission Equipment & System Security and New Technology, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing, China
E-mail: zdwei@cqu.edu.cn
Fax: +86-23-65102531

^b Institute of Chemistry, The Chinese Academy of Sciences, Beijing, China
E-mail: wanlijun@iccas.ac.cn
Fax: +86-010-62751700

Abstract

We describe a facile and controllable process for preparing Pd@Pt/CNT core@shell catalysts for the oxygen reduction reaction (ORR) via Pd-induced Pt(IV) reduction on Pd/CNT. The mass-specific activity for the ORR of the Pd@Pt/CNT catalysts is 7–9 times higher than that of the state-of-the-art Pt/C catalysts, but the yield of H₂O₂, a harmful species for the stability of catalysts, of the former is only 14.1% of that of the latter. The reason for the enhanced activity and the lower H₂O₂ yield on the Pd@Pt/CNT catalysts was studied by DFT calculations.

Journal of Materials Chemistry A

Pd-induced Pt(iv) reduction to form Pd@Pt/CNT core@shell catalyst for a more complete oxygen reduction†

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Pd-induced Pt(IV) reduction to form Pd@Pt/CNT core@shell catalyst for a more complete oxygen reduction

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