Identifying “Optimal” Electrocatalysts: Impact of Operating Potential and Charge Transfer Model
Identifying “Optimal” Electrocatalysts: Impact of Operating Potential and Charge Transfer Model
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识别“最佳”电催化剂:工作潜力和电荷转移模型的影响
DOI:
10.1021/acscatal.7b03235
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发表时间:
2017
期刊:
影响因子:
12.9
通讯作者:
Holewinski, Adam
中科院分区:
文献类型:
--
作者:
Román, Alex M.;Dudoff, Jessica;Baz, Adam;Holewinski, Adam
Understanding the influence of potential on electrochemical surface reaction kinetics remains a challenge in identifying catalytic materials for numerous important reactions including water splitting (OER), hydrogen evolution (HER), and CO2reduction, among others. Limitations in computational methods, complicated by the unique environment of the electrode–electrolyte interface, have compelled many studies to focus on the thermodynamics of reaction schemes and to generalize inferences about the kinetics of charge transfer. In instances where activation barrier estimates are available, they are typically assumed to follow the empirical Butler–Volmer (BV) model. In this Perspective, we illustrate that the relative magnitudes and potential-dependences of elementary barriers can have a marked effect on the properties of a catalyst deemed “optimal” for a given reaction. We use a simple pseudosteady-state analysis of two sequential surface-mediated charge transfers to assess the degree of rate control of each step as a function of the material and conditions. We compare BV kinetics to Marcus theory and also discuss more recent models that are specific to the interactions of an adsorbate with the electronic structure of a surface. Recent developments in the full simulation of charge transfer to surface species are also briefly discussed. Finally, we highlight the need for assessment of kinetics and identification of activity descriptors that are optimalat relevant operating conditions,and we conclude with an outlook on current research needs.
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影响因子:
8.6
作者:
J. Perdew;K. Burke;M. Ernzerhof
通讯作者:
J. Perdew;K. Burke;M. Ernzerhof
DOI:
--
发表时间:
1968
期刊:
影响因子:
--
作者:
J. Hale
通讯作者:
J. Hale
DOI:
--
发表时间:
2002
期刊:
影响因子:
--
作者:
C. Jacobsen;S. Dahl;A. Boisen;B. Clausen;H. Topsøe;Á. Logadóttir;J. Nørskov
通讯作者:
J. Nørskov
影响因子:
4.5
作者:
Laborda, Eduardo;Henstridge, Martin C.;Compton, Richard G.
通讯作者:
Compton, Richard G.