Beyond the top of the volcano? A unified approach to electrocatalytic oxygen reduction and oxygen evolution
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F16%3A00472523" target="_blank" >RIV/61388955:_____/16:00472523 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.nanoen.2016.04.011" target="_blank" >http://dx.doi.org/10.1016/j.nanoen.2016.04.011</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.nanoen.2016.04.011" target="_blank" >10.1016/j.nanoen.2016.04.011</a>
Alternative languages
Result language
angličtina
Original language name
Beyond the top of the volcano? A unified approach to electrocatalytic oxygen reduction and oxygen evolution
Original language description
We study the oxygen reduction (ORR) and the oxygen evolution reaction (OER) and based on previous obtained mechanistic insight we provide a unified general analysis of the two reactions simultaneously. The analysis shows that control over at least two independent binding energies is required to obtain a reversible perfect catalyst for both ORR and OER. Often only the reactivity of the surface is changed by changing from one material to another and all binding energies scale with the reactivity. We investigate the limitation in efficiency imposed by these linear scaling relations. This analysis gives rise to a double volcano for ORR and OER, with a region in between, forbidden by the scaling relations. The reversible perfect catalyst for both ORR and OER would fall into this "forbidden region". Previously, we have found that hydrogen acceptor functionality on oxide surfaces can improve the catalytic performance for OER beyond the limitations originating from the scaling relations. We use this concept to search for promising combinations of binding sites and hydrogen donor/acceptor sites available in transition metal doped graphene, which can act as a catalyst for ORR and OER. We find that MnN4-site embedded in graphene by itself or combined with a COOH is a promising combination for a great combined ORR/OER catalyst. (C) 2016 Elsevier Ltd. All rights reserved.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CF - Physical chemistry and theoretical chemistry
OECD FORD branch
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Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Nano Energy
ISSN
2211-2855
e-ISSN
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Volume of the periodical
29
Issue of the periodical within the volume
NOV 2016
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
126-135
UT code for WoS article
000389624100010
EID of the result in the Scopus database
2-s2.0-84965069069