The effect of alloying on the oxygen reduction reaction activity of carbon-supported PtCu and PtPd nanorods

Yi Chia Tseng, Hong Shuo Chen, Chen Wei Liu, Tzu Hau Yeh, Kuan Wen Wang

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

In this study, we have investigated the effect of alloying on the modification of the d-band vacancies and oxygen reduction reaction (ORR) activity of PtPd and PtCu nanorods (NRs). PtCu and PtPd NRs with various ratios can be prepared successfully by a facile formic acid reduction method. The number of unfilled d-states (HTs) value of Pt nanoparticles is decreased due to the formation of NRs, and further decreased due to the alloying with different metals. For the Pt3Pd NRs, the HTs value is as low as 0.3056, suggesting that they have lower unfilled Pt d-states, and more d-band electrons transfer from Pd to Pt, leading to higher ORR activities than Pt/C. Besides, the electron transfer number (n) of Pt3Pd NRs towards the ORR is 3.7, meaning that they complete the O2 reduction to water and exhibit low hydrogen peroxide production during the ORR. As a result, the correlation between the HTs and ORR performance of PtPd and PtCu NRs highlights that the one-dimensional (1-D) structure and the electronic modification effect from Pd to Pt result in the excellent ORR activity and durability of Pt3Pd NRs synergistically.

Original languageEnglish
Pages (from-to)4270-4275
Number of pages6
JournalJournal of Materials Chemistry A
Volume2
Issue number12
DOIs
StatePublished - 28 Mar 2014

Fingerprint

Dive into the research topics of 'The effect of alloying on the oxygen reduction reaction activity of carbon-supported PtCu and PtPd nanorods'. Together they form a unique fingerprint.

Cite this