Synergistic effect of p-type and n-type dopants in semiconductors for efficient electrocatalytic water splitting
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F22%3A00564983" target="_blank" >RIV/61388955:_____/22:00564983 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0336555" target="_blank" >https://hdl.handle.net/11104/0336555</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/d2sc04585k" target="_blank" >10.1039/d2sc04585k</a>
Alternative languages
Result language
angličtina
Original language name
Synergistic effect of p-type and n-type dopants in semiconductors for efficient electrocatalytic water splitting
Original language description
The main challenge for acidic water electrolysis is the lack of active and stable oxygen evolution catalysts based on abundant materials, which are globally scalable. Iridium oxide is the only material which is active and stable. However, Ir is extremely rare. While both active materials and stable materials exist, those that are active are usually not stable and vice versa. In this work, we present a new design strategy for activating stable materials originally deemed unsuitable due to a semiconducting nature and wide band gap energy. These stable semiconductors cannot change oxidation state under the relevant reaction conditions. Based on DFT calculations, we find that adding an n-type dopant facilitates oxygen binding on semiconductor surfaces. The binding is, however, strong and prevents further binding or desorption of oxygen. By combining both n-type and p-type dopants, the reactivity can be tuned so that oxygen can be adsorbed and desorbed under reaction conditions. The tuning results from the electrostatic interactions between the dopants as well as between the dopants and the binding site. This concept is experimentally verified on TiO2 by co-substituting with different pairs of n- and p-type dopants. Our findings suggest that the co-substitution approach can be used to activate stable materials, with no intrinsic oxygen evolution activity, to design new catalysts for acid water electrolysis.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
<a href="/en/project/GA21-03037S" target="_blank" >GA21-03037S: Selectivity control of anodic reactions applicable in chlor-alkaline and chlorate processes</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Chemical Science
ISSN
2041-6520
e-ISSN
2041-6539
Volume of the periodical
13
Issue of the periodical within the volume
46
Country of publishing house
GB - UNITED KINGDOM
Number of pages
14
Pages from-to
13879-13892
UT code for WoS article
000885568400001
EID of the result in the Scopus database
2-s2.0-85142653279