Tailorable surface sulfur chemistry of mesoporous Ni3S2 particles for efficient oxygen evolution

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F19%3A63523474" target="_blank" >RIV/70883521:28110/19:63523474 - isvavai.cz</a>
Alternative codes found
RIV/70883521:28610/19:63523474
Result on the web
<a href="https://pubs.rsc.org/en/content/articlelanding/2019/ta/c9ta00646j#!divAbstract" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2019/ta/c9ta00646j#!divAbstract</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/c9ta00646j" target="_blank" >10.1039/c9ta00646j</a>

Result language
angličtina
Original language name
Tailorable surface sulfur chemistry of mesoporous Ni3S2 particles for efficient oxygen evolution
Original language description
Boosting the intrinsic activity of electrocatalysts is pivotal in enhancing the oxygen evolution reaction (OER) at the source. Herein, we synthesize a mesoporous Ni 3 S 2 particle electrocatalyst on Ni foam that has appropriate surface sulfur chemistry and demonstrates excellent catalytic activity as well as rapid reaction kinetics. The optimized Ni 3 S 2 electrocatalyst shows ultralow overpotentials of 213 and 283 mV at 10 and 100 mA cm −2 , respectively, with a very low Tafel slope of 45 mV dec −1 in alkaline media. The ECSA normalized current density is 1.1 mA cm −2 at an overpotential of 270 mV, nearly three times higher than that of pristine Ni 3 S 2 (0.4 mA cm −2 ). It has been observed that the sulfur-engineered Ni 3 S 2 electrocatalyst can promote more Ni 3+ generation with a significant shift of the Ni center binding energy compared with pristine Ni 3 S 2 during the OER. The findings propose a facile tactic to improve the intrinsic OER activity for water splitting by optimizing the surface sulfur chemistry of metal sulfide-based electrocatalysts.
Czech name
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Czech description
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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
10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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