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@INPROCEEDINGS{Zhang:1021442,
author = {Zhang, Yufan and Huang, Jun and Eikerling, Michael},
title = {{C}riterion for {F}inding the {O}ptimal {E}lectrocatalyst
at any {O}verpotential},
reportid = {FZJ-2024-00738},
year = {2023},
abstract = {The generic volcano plot is a widely employed practical
tool to display and compare the activity of different
electrocatalysts in dependence of a small number of
descriptors. It is known that the apex of the volcano curve
shifts with applied potential. [1] However, the trend of the
potential-dependent shift of the volcano apex has remained
unclear. Herein, we address this question for a two-step
electrocatalytic reaction. [2] With the transfer coefficient
assumed as 1/2, our analysis reveals that the adsorbate
coverage at the volcano apex equals 1/2 regardless of
potential. We present a criterion to predict the direction
and magnitude of the apex shift as a function of the
activation energies of the two steps. Thereafter, the
criterion is extended to the oxygen reduction reaction. The
influence of the transfer coefficient and the potential of
zero charge on the volcano plot is revealed. Implications of
the presented criterion for targeted design of
electrocatalysts are discussed.},
month = {Sep},
date = {2023-09-03},
organization = {Annual meeting of international
society of electrochemistry, Lyon
(France), 3 Sep 2023 - 8 Sep 2023},
subtyp = {Other},
cin = {IEK-13},
cid = {I:(DE-Juel1)IEK-13-20190226},
pnm = {1231 - Electrochemistry for Hydrogen (POF4-123)},
pid = {G:(DE-HGF)POF4-1231},
typ = {PUB:(DE-HGF)24},
doi = {10.34734/FZJ-2024-00738},
url = {https://juser.fz-juelich.de/record/1021442},
}