Fabrication of Ni2O2(OH)/CNTs-based electrocatalyst for efficient bifunctional electrocatalytic water splitting
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F24%3AA250383U" target="_blank" >RIV/61988987:17310/24:A250383U - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0360319924005196?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0360319924005196?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.ijhydene.2024.02.109" target="_blank" >10.1016/j.ijhydene.2024.02.109</a>
Alternative languages
Result language
angličtina
Original language name
Fabrication of Ni2O2(OH)/CNTs-based electrocatalyst for efficient bifunctional electrocatalytic water splitting
Original language description
Exploring the cost-effective and earth-abundant electrocatalyst for efficient bifunctional activity is very challenging these days. The main reason is very slow OER (oxygen evolution reaction) kinetics as compared with HER (hydrogen evolution reaction). An electrocatalyst with enhanced kinetics towards OER and HER is highly required, which may be attributed to a larger surface area, an increased number of active sites, and lower charge transfer resistance. In this paper, we have reported a very efficient bifunctional Ni2O2(OH)/CNTs electrocatalyst by a facile ultrasonication route followed by annealing for OER/HER performance in an alkaline solution. The Ni2O2(OH)/CNTs electrocatalyst exhibits a lower overpotential of 228 mV and 270 mV during OER to accomplish a current density of 40 and 100 mAcm � 2 while it requires a 368 mV and 418 mV overpotential during HER to achieve a current density of 40 and 100 mAcm � 2. The prepared Ni2O2(OH)/CNTs electrocatalyst has a lesser Tafel slope (132 mVdec � 1; OER, 115 mVdec � 1; HER) as compared to Ni2O2(OH) (239 mVdec � 1; OER, 124 mVdec-1, HER). Ni2O2(OH)/CNTs exhibit reduced charge resistance, enhanced electrochemical active surface area, greater carrier concentration, and a higher exchange current density, which confirms its superior bifunctional electrocatalytic activity. This work provides an economical and affordable means to prepare superior, efficient bifunctional electrocatalysts for widespread commercial 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
10400 - Chemical sciences
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
International Journal of Hydrogen Energy
ISSN
0360-3199
e-ISSN
1879-3487
Volume of the periodical
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Issue of the periodical within the volume
2024
Country of publishing house
GB - UNITED KINGDOM
Number of pages
10
Pages from-to
601-610
UT code for WoS article
001202113700001
EID of the result in the Scopus database
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