Back to Search
Start Over
Engineering Se vacancies to promote the intrinsic activities of P doped NiSe2 nanosheets for overall water splitting
- Source :
- Journal of Colloid and Interface Science. 571:260-266
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- Element doping is a general and effective approach to modify the electrocatalytic performances, but the low intrinsic activity in each electroactive site still limits the further improvements. Herein, we provide an effective strategy by simultaneously introducing P doping and Se vacancies to enhance the intrinsic activities in NiSe2 nanosheet arrays (A-NiSe2|P) through Ar plasma treatment. Owing to the increased active sites and enhanced electrical conductivity, the resulted A-NiSe2|P shows the enhanced hydrogen evolution performances. Theoretical calculations reveal that introduction of Se vacancies plays a significant role in lowering the adsorption free energy of H* in Ni, Se and P sites, leading to promoted intrinsic activities in A-NiSe2|P. Further, A-NiSe2|P as bifunctional electrocatalysts only needs 1.62 V to reach 10 mA cm−2 for overall water splitting. Our study and understanding of A-NiSe2|P may highlight the importance of element doping and vacancies in enhancing the catalytic activities in overall water splitting.
- Subjects :
- Materials science
Intrinsic activity
Doping
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Catalysis
Biomaterials
chemistry.chemical_compound
Colloid and Surface Chemistry
Adsorption
chemistry
Chemical engineering
Electrical resistivity and conductivity
Water splitting
0210 nano-technology
Bifunctional
Nanosheet
Subjects
Details
- ISSN :
- 00219797
- Volume :
- 571
- Database :
- OpenAIRE
- Journal :
- Journal of Colloid and Interface Science
- Accession number :
- edsair.doi...........22bab1b85946eee7052525ab973f818f