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A heterogeneous interface on NiS@Ni3S2/NiMoO4 heterostructures for efficient urea electrolysis.
- Source :
- Journal of Materials Chemistry A; 9/21/2020, Vol. 8 Issue 35, p18055-18063, 9p
- Publication Year :
- 2020
-
Abstract
- Urea electrolysis is an appealing energy conversion technology to produce hydrogen (H<subscript>2</subscript>) and alleviate the problem of urea-rich wastewater treatment concurrently. In particular, electrocatalytic performance can be dramatically enhanced by rationally modulating the surface charge distribution with a well-tuned heterostructure. Herein, a heterostructure is constructed by NiMoO<subscript>4</subscript> nanosheets grown on an interior hollow NiS@Ni<subscript>3</subscript>S<subscript>2</subscript> nanorods framework (NiS@Ni<subscript>3</subscript>S<subscript>2</subscript>/NiMoO<subscript>4</subscript>). Density functional theory (DFT) calculations demonstrate that the formed heterojunction structure leads to a tailored surface charge state of NiMoO<subscript>4</subscript>, with oxygen as the nucleophilic region and molybdenum as the electrophilic region, which facilitates the decomposition of urea molecules and thus significantly improves hydrogen evolution. As expected, the assembled NiS@Ni<subscript>3</subscript>S<subscript>2</subscript>/NiMoO<subscript>4</subscript> system substantially expedites urea electrolysis activity with a cell voltage of 1.40 V at 10 mA cm<superscript>−2</superscript>, which is 200 mV less than the voltage of an overall water splitting system. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507488
- Volume :
- 8
- Issue :
- 35
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry A
- Publication Type :
- Academic Journal
- Accession number :
- 145889773
- Full Text :
- https://doi.org/10.1039/d0ta04944a