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Title: Activity enhancement of tetrahexahedral Pd nanocrystals by bi decoration towards Ethanol electrooxidation in alkaline media
Authors: Wang, P.
Lin, Xiao
Yang, Bo
Jin, Jia - Mei
Hardacre, Christopher
Yu, Neng - Fe
Sun, Shi-Gang
Lin, Wen-Feng
Keywords: Pd nanocatalyst
Ethanol electrooxidation
Alkaline fuel cell
Issue Date: 2015
Publisher: © Elsevier
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.
Abstract: Tetrahexahedral 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.
Description: 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.2015.02.177
Sponsor: Financial support from the UK EPSRC (EP/I013229/1) and the State Key Laboratory of Physical Chemistry of Solid Surfaces (Xiamen University) is acknowledged.
Version: Accepted for publication
DOI: 10.1016/j.electacta.2015.02.177
URI: https://dspace.lboro.ac.uk/2134/20352
Publisher Link: http://dx.doi.org/10.1016/j.electacta.2015.02.177
ISSN: 0013-4686
Appears in Collections:Published Articles (Chemical Engineering)

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