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Enhanced oxygen evolution reaction activity of Ni(OH)2 nanosheets via the modified effect of sulfur.
- Source :
- Journal of Chemical Sciences; Sep2022, Vol. 134 Issue 3, p1-9, 9p
- Publication Year :
- 2022
-
Abstract
- Electrochemical water splitting has excellent application prospects in clean energy technology. However, due to the large overpotential required for the OER reaction during the water-splitting reaction, the modification of electrocatalysts is a vital strategy to address the slow kinetics of the OER reaction. In this paper, a simple and rapid two-step hydrothermal sulfidation method was used to prepare S-modified Ni(OH)<subscript>2</subscript> nanosheets electrocatalysts at 120 °C. At the same time, the well-designed nanostructured catalyst on the nickel foam substrate exposes a large number of active sites, and the simultaneously generated oxygen vacancies are beneficial to the penetration of the electrolyte and release of O<subscript>2</subscript>, thus significantly improving the OER performance. In 1.0 M KOH electrolyte, Ni<subscript>9</subscript>S<subscript>8</subscript>/Ni(OH)<subscript>2</subscript>/NF exhibits excellent catalytic activity for OER. The catalyst requires only 430 mV overpotential at a current density of 100 mA cm<superscript>-2</superscript>. In addition, Ni<subscript>9</subscript>S<subscript>8</subscript>/Ni(OH)<subscript>2</subscript>/NF also has excellent long-term stability. This work reports the formation of Ni<subscript>9</subscript>S<subscript>8</subscript>/Ni(OH)<subscript>2</subscript>/NF heterojunctions by sulfiding Ni(OH)<subscript>2</subscript> on porous nickel foam. Surprisingly, these Ni<subscript>9</subscript>S<subscript>8</subscript>/Ni(OH)<subscript>2</subscript>/NF heterojunctions exhibit excellent oxygen evolution reaction performance and long-term stability. This is superior to most reported electrocatalysts for oxygen evolution reactions. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09743626
- Volume :
- 134
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Journal of Chemical Sciences
- Publication Type :
- Academic Journal
- Accession number :
- 158274177
- Full Text :
- https://doi.org/10.1007/s12039-022-02072-y