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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/70883521:28610/19:63523474

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Materials Chemistry A

ISSN

2050-7488

e-ISSN

—

Svazek periodika

7

Číslo periodika v rámci svazku

13

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

5

Strana od-do

7548-7552

Kód UT WoS článku

000463819400024

EID výsledku v databázi Scopus

2-s2.0-85063501561