Toggle Main Menu Toggle Search

Open Access padlockePrints

Effect of methanol concentration on oxygen reduction reaction activity of Pt/C catalysts

Lookup NU author(s): Professor Wen-Feng Lin, Professor Paul Christensen

Downloads

Full text for this publication is not currently held within this repository. Alternative links are provided below where available.


Abstract

The oxygen reduction reaction (ORR) activity of Pt/C catalysts was investigated in electrolytes of 0.5 mol/L H2SO4 containing varying concentrations of methanol in a half-cell. It was found that the ORR activity was improved notably in an electrolyte of 0.5 mol/L H2SO4 containing 0.1 mol/L CH3OH as compared with that in 0.5 mol/L H2SO4, 0.5 mol/L H2SO4 containing 0.5 mol/L CH3OH, or 0.5 mol/L H2SO4 containing 1.0 mol/L CH3OH electrolytes. The same tendency for improved ORR activity was also apparent after commercial Nafion (R) NRE-212 membrane was hot-pressed onto the catalyst layers. The linear sweep voltammetry results indicate that the ORR activities of the Pt/C catalyst were almost identical in the 0.5 mol/L H2SO4 + 0.1 mol/L CH3OH solution before and after coated with the Nafion (R) membrane. Electrochemical impedance spectroscopy results demonstrated that the resistance of the Nafion (R) membrane is smaller in the electrolyte of 0.5 mol/L H2SO4 + 0.1 mol/L CH3OH than in other electrolytes with oxygen gas feed. This exceptional property of the Nafion (R) membrane is worth investigating and can be applied in fuel cell stacks to improve the system performance. (c) 2013, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.


Publication metadata

Author(s): Tang SH, Lin WF, Christensen PA, Haarberg GM

Publication type: Article

Publication status: Published

Journal: Chinese Journal of Catalysis

Year: 2013

Volume: 34

Issue: 6

Pages: 1105-1111

Print publication date: 20/06/2013

ISSN (print): 0253-9837

ISSN (electronic): 1872-2067

Publisher: Kexue Chubanshe, Science Press

URL: http://dx.doi.org/10.1016/S1872-2067(11)60480-4

DOI: 10.1016/S1872-2067(11)60480-4


Altmetrics

Altmetrics provided by Altmetric


Actions

Find at Newcastle University icon    Link to this publication


Share