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Polysulfide induced synthesis of a MoS2 self-supporting electrode with wide-layer-spacing for efficient electrocatalytic water splitting.
- Source :
- Physical Chemistry Chemical Physics (PCCP); 9/14/2023, Vol. 25 Issue 34, p23277-23285, 9p
- Publication Year :
- 2023
-
Abstract
- Efficient non-noble metal bifunctional electrocatalysts can increase the conversion rate of electric energy in the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). Herein, a ball & sheet MoS<subscript>2</subscript>/Ni<subscript>3</subscript>S<subscript>2</subscript> composite with wide-layer-spacing and high 1T-rich MoS<subscript>2</subscript> is assembled on nickel foam (NF) via a two-step solvothermal method with polymeric sulfur (S-r-DIB) as the sulfur source. The obtained material serves as both the cathode and the anode toward overall water splitting in an alkaline electrolyte. The results proved that the interpenetration of MoS<subscript>2</subscript>/Ni<subscript>3</subscript>S<subscript>2</subscript>-p with a ball and sheet structure increased the material active surface area and exposed more catalytic active sites, which contributed to the penetration of solution and the transfer of charge/hydrion. Meanwhile, two different semiconductors of MoS<subscript>2</subscript> and Ni<subscript>3</subscript>S<subscript>2</subscript> along with the presence of ample active sulfur edge sites and few-layer, wide-layer-spacing structures of MoS<subscript>2</subscript> lead to an outstanding electrocatalytic activity. In particular, the electrodes of MoS<subscript>2</subscript>/Ni<subscript>3</subscript>S<subscript>2</subscript>-p only need a battery voltage of 1.55 V at 10 mA cm<superscript>−2</superscript>. The bifunctional electrocatalyst MoS<subscript>2</subscript>/Ni<subscript>3</subscript>S<subscript>2</subscript>-p also shows excellent stability at large current densities during the electrochemical test. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14639076
- Volume :
- 25
- Issue :
- 34
- Database :
- Complementary Index
- Journal :
- Physical Chemistry Chemical Physics (PCCP)
- Publication Type :
- Academic Journal
- Accession number :
- 171107757
- Full Text :
- https://doi.org/10.1039/d3cp01185b