Issue 27, 2014

Tuning the oxygen reduction activity of the Pt–Ni nanoparticles upon specific anion adsorption by varying heat treatment atmospheres

Abstract

Heat treatment of Pt based nanoparticles under various conditions is one of the conventional ways to modify the electrocatalytic properties for enhancement of the oxygen reduction reaction (ORR). However, the effect of the heat treatment atmosphere on the ORR activity especially upon specific anion adsorption still remains unclear. This paper investigates the Pt–Ni bimetallic nanoparticles (Pt2Ni1), under various heat treatment atmospheres, as enhanced cathodic electrocatalysts for the high temperature-proton exchange membrane fuel cell (HT-PEMFC) using a phosphoric acid doped polybenzimidazole (p-PBI) membrane. The X-ray spectroscopic measurement showed the variations of the electronic structures of Pt–Ni nanoparticles under the heat treatment condition. In the half-cell measurement, the argon treated electrocatalyst demonstrated the highest catalytic activity owing to the appropriate electronic interaction between Pt and Ni. The single cell test with a p-PBI membrane, at 160 °C, also confirmed the excellent oxygen reduction reactivity and durability of the argon-treated Pt–Ni nanoparticles. This result suggested that the alteration of the electronic structure by a proper heat treatment atmosphere upon specific anion adsorption decisively influenced the ORR activity both at half-cell and single-cell scales.

Graphical abstract: Tuning the oxygen reduction activity of the Pt–Ni nanoparticles upon specific anion adsorption by varying heat treatment atmospheres

Supplementary files

Article information

Article type
Paper
Submitted
14 ม.ค. 2557
Accepted
03 เม.ย. 2557
First published
03 เม.ย. 2557

Phys. Chem. Chem. Phys., 2014,16, 13726-13732

Tuning the oxygen reduction activity of the Pt–Ni nanoparticles upon specific anion adsorption by varying heat treatment atmospheres

Y. Chung, S. J. Kim, D. Y. Chung, M. J. Lee, J. H. Jang and Y. Sung, Phys. Chem. Chem. Phys., 2014, 16, 13726 DOI: 10.1039/C4CP00187G

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements