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In situ construction of superhydrophilic crystalline Ni3S2@amorphous VOx heterostructure nanorod arrays for the hydrogen evolution reaction with industry-compatible current density.
- Source :
- Dalton Transactions: An International Journal of Inorganic Chemistry; 5/14/2022, Vol. 51 Issue 18, p7234-7240, 7p
- Publication Year :
- 2022
-
Abstract
- The synergistic effect of a highly active surface/interface and an optimized electronic structure of electrocatalysts is of great significance to improve the performance of the hydrogen evolution reaction. Herein, a superhydrophilic core@shell heterostructure nanorod-integrated electrode composed of an amorphous VO<subscript>x</subscript> nanoshell (3-7 nm) and a crystalline Ni<subscript>3</subscript>S<subscript>2</subscript> core supported on Ni foam (CS--NS/NF) was prepared by an in situ conversion method. We prove that the amorphous VO<subscript>x</subscript> not only helps to kinetically decouple the adsorption/dissociation of hydroxyl/water, but also enriches the active sites, thereby significantly enhancing the electron transfer efficiency and electrocatalytic activity toward the hydrogen evolution reaction (HER). The optimized CS--NS/NF has excellent hydrogen production performance, with overpotentials of 335 and 394 mV at current densities of 500 and 1000 mA cm<superscript>-2</superscript>, respectively, as well as superior durability for over 68 h in 1 M KOH. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 51
- Issue :
- 18
- Database :
- Complementary Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 156928851
- Full Text :
- https://doi.org/10.1039/d2dt00157h