Tunable Pt−MoSx Hybrid Catalysts for Hydrogen Evolution
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F18%3APU132169" target="_blank" >RIV/00216305:26620/18:PU132169 - isvavai.cz</a>
Result on the web
<a href="https://pubs.acs.org/doi/abs/10.1021/acsami.7b19346" target="_blank" >https://pubs.acs.org/doi/abs/10.1021/acsami.7b19346</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acsami.7b19346" target="_blank" >10.1021/acsami.7b19346</a>
Alternative languages
Result language
angličtina
Original language name
Tunable Pt−MoSx Hybrid Catalysts for Hydrogen Evolution
Original language description
Platinum (Pt)-based materials are inevitably among the best-performing electrocatalysts for hydrogen evolution reaction (HER). MoS2 was suggested to be a potent HER catalyst to replace Pt in this reaction by theoretical modeling; however, in practice, this dream remains elusive. Here we show a facile one-pot bottom-up synthesis of Pt−MoSx composites using electrochemical reduction in an electrolytic bath of Pt precursor and ammonium tetrathiomolybdate under ambient conditions. By modifying the millimolar concentration of Pt precursors, composites of different surface elemental composition are fabricated; specifically, Pt1.8MoS2, Pt0.1MoS2.5, Pt0.2MoS0.6, and Pt0.3MoS0.8. All electrodeposited Pt−MoSx hybrids showcase low overpotentials and small Tafel slopes that outperform MoS2 as an electrocatalyst. Tantamount to electrodeposited Pt, the rate-limiting process in the HER mechanism is determined to be the Heyrovsky desorption across Pt−MoSx hybrids and starkly swings from the ratedetermining Volmer adsorption step in MoS2. The Pt−MoSx composites are equipped with catalytic performance that closely mirrors that of electrodeposited Pt, in particular the HER kinetics for Pt1.8MoS2 and Pt0.1MoS2.5. This work advocates electrosynthesis as a cost-effective method for catalyst design and fabrication of competent composite materials for water splitting applications.
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
20501 - Materials engineering
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
ACS APPL MATER INTER
ISSN
1944-8244
e-ISSN
1944-8252
Volume of the periodical
10
Issue of the periodical within the volume
10
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
8702-8711
UT code for WoS article
000427910800035
EID of the result in the Scopus database
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