PdBi EtOH pdf accepted online 21 2 2015 1-s2.0-S0013468615004983-main.pdf (2.96 MB)
Activity enhancement of tetrahexahedral Pd nanocrystals by bi decoration towards Ethanol electrooxidation in alkaline media
journal contribution
posted on 2016-02-19, 11:25 authored by P. Wang, Xiao Lin, Bo Yang, Jia-Mei Jin, Christopher Hardacre, Neng-Fe Yu, Shi-Gang Sun, Wen-Feng LinWen-Feng LinTetrahexahedral Pd nanocrystals (THH Pd NCs) were prepared on a glassy carbon electrode
using a programmed square-wave potential electrodeposition method, and modified by Bi
adatoms with a range of coverages via the cyclic voltammetry method. The reactivity of the catalysts prepared towards ethanol electrooxidation reaction (EOR) was studied in alkaline medium at various temperatures and under other conditions that practical fuel cells operate. Significant activity enhancements were observed for the Bi-modified THH Pd NCs with an optimum Bi coverage (θBi) of around 0.68 being obtained. Furthermore, it was found that
increasing temperature from 25 ºC to 60 ºC enhances the reactivity significantly. The general kinetics data of EOR on Bi-decorated and bare THH Pd NCs have also been obtained, from the activation energy calculated based on Arrhenius plots, and compared. At the optimum Bi coverage, an enhancement in the activity of almost 3 times was achieved, and the corresponding activation energy was found to be reduced significantly.
Funding
Financial support from the UK EPSRC (EP/I013229/1) and the State Key Laboratory of Physical Chemistry of Solid Surfaces (Xiamen University) is acknowledged.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Chemical Engineering
Published in
ELECTROCHIMICA ACTAVolume
162Pages
290 - 299 (10)Citation
WANG, P. ...et al., 2015. Activity enhancement of tetrahexahedral Pd nanocrystals by bi decoration towards Ethanol electrooxidation in alkaline media. Electrochimica Acta, 162, pp. 290-299.Publisher
© ElsevierVersion
- AM (Accepted Manuscript)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2015Notes
This paper was accepted for publication in the journal Electrochimica Acta and the definitive published version is available at http://dx.doi.org/10.1016/j.electacta.2015.02.177ISSN
0013-4686Publisher version
Language
- en