2H -> 1T Phase Engineering of Layered Tantalum Disulfides in Electrocatalysis: Oxygen Reduction Reaction
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F17%3A43913385" target="_blank" >RIV/60461373:22310/17:43913385 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21230/17:00312114 RIV/61989592:15310/17:73584880 RIV/60461373:22810/17:43913385
Result on the web
<a href="http://onlinelibrary.wiley.com/doi/10.1002/chem.201701494/full" target="_blank" >http://onlinelibrary.wiley.com/doi/10.1002/chem.201701494/full</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/chem.201701494" target="_blank" >10.1002/chem.201701494</a>
Alternative languages
Result language
angličtina
Original language name
2H -> 1T Phase Engineering of Layered Tantalum Disulfides in Electrocatalysis: Oxygen Reduction Reaction
Original language description
Tremendous attention is currently being paid to renewable sources of energy. Transition-metal dichalcogenides (TMDs) have been intensively studied for their promising catalytic activities in the hydrogen evolution reaction (HER) and the oxygen reduction reaction (ORR). In this fundamental work, we explored the catalytic properties of TMD family members 2HTaS(2) and 1T TaS2. Our findings reveal that both polytypes exhibit poor HER performance, which is even more pronounced after electrochemical reduction/oxidation. Our experimental data show that 1T TaS2 has a lower overpotential at a current density of -10 mA cm(-1), despite theoretical DFT calculations that indicated that the more favorable free energy of hydrogen adsorption should make "perfect" 2HTaS(2) a better HER catalyst. Thorough characterization showed that the higher conductivity of 1T TaS2 and a slightly higher surface oxidation of 2HTaS(2) explains this discrepancy. Moreover, changes in the catalytic activity after electrochemical treatment are addressed here. For the ORR in an alkaline environment, the electrochemical treatment led to an improvement in catalytic properties. With onset potentials similar to that of Pt/C catalysts, TaS2 was found to be an efficient catalyst for the ORR, rather than for proton reduction, in contrast to the behavior of Group 6 layered TMDs.
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
10402 - Inorganic and nuclear chemistry
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Chemistry A European Journal
ISSN
0947-6539
e-ISSN
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Volume of the periodical
23
Issue of the periodical within the volume
33
Country of publishing house
DE - GERMANY
Number of pages
10
Pages from-to
8082-8091
UT code for WoS article
000403150100034
EID of the result in the Scopus database
2-s2.0-85019971724