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PtCu nanoalloy loaded on sulfur-doped porous g-C3N4 for electrocatalytic hydrogen evolution.
- Source :
- New Journal of Chemistry; 3/14/2024, Vol. 48 Issue 10, p4296-4303, 8p
- Publication Year :
- 2024
-
Abstract
- Graphitic carbon nitride (g-C<subscript>3</subscript>N<subscript>4</subscript>), as a carbon support material with excellent stability and abundant active sites, has found widespread applications in various fields, including photocatalytic water splitting, electrolysis of water, and CO<subscript>2</subscript> reduction. Presently, research on the modification of g-C<subscript>3</subscript>N<subscript>4</subscript> primarily focuses on atomic doping, defect engineering, and the decoration of metal nanoparticles. In this study, a method involving the high-temperature pyrolysis of a solution containing thiourea and urea was successfully employed to synthesize sulfur-doped porous g-C<subscript>3</subscript>N<subscript>4</subscript> (S-C<subscript>3</subscript>N<subscript>4</subscript>) nanosheets. Subsequently, PtCu nanoparticles were loaded onto the S-C<subscript>3</subscript>N<subscript>4</subscript> through a hydrothermal process. In the case of Pt loading of less than half of 20% Pt/C, this catalyst exhibited a low overpotential of only 10 mV at a current density of 10 mA cm<superscript>−2</superscript>, which is significantly better than the 35 mV overpotential of 20% Pt/C. Furthermore, after a long period of continuous current stability testing, the overpotential of the catalyst did not increase by more than 30 mV, demonstrating excellent stability. The porous S-C<subscript>3</subscript>N<subscript>4</subscript> nanosheets possess a large specific surface area, providing abundant active sites for the HER reaction. This research introduces a fresh method for creating innovative catalysts based on Pt alloys supported by a carbon carrier. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 48
- Issue :
- 10
- Database :
- Complementary Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 175824578
- Full Text :
- https://doi.org/10.1039/d4nj00135d