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Parallelized Reaction Pathway and Stronger Internal Band Bending by Partial Oxidation of Metal Sulfide–Graphene Composites: Important Factors of Synergistic Oxygen Evolution Reaction Enhancement
- Source :
- ACS Catalysis. 8:4091-4102
- Publication Year :
- 2018
- Publisher :
- American Chemical Society (ACS), 2018.
-
Abstract
- The electrocatalytic performance of transition metal sulfide (TMS)–graphene composites has been simply regarded as the results of high conductivity and the large surface/volume ratio. However, unavoidable factors such as degree of oxidation of TMSs have been hardly considered for the origin of this catalytic activity of TMS–graphene composites. To accomplish the reliable application of TMS-based electrocatalytic materials, a clear understanding of the thermodynamic stability of TMS and effects of oxidation on catalytic activity is necessary. In addition, the mechanism of charge transfer at the TMS–graphene interface must be studied in depth to properly design composite materials. Herein, we report a comprehensive study of the physical chemistry at the junction of a Co1–xNixS2–graphene composite, which is a prototype designed to unravel the mechanisms of charge transfer between TMS and graphene. Specifically, the thermodynamic stability and the effects of oxidation of TMSs during the oxygen evolution react...
- Subjects :
- chemistry.chemical_classification
Materials science
Sulfide
Graphene
Oxygen evolution
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Catalysis
0104 chemical sciences
law.invention
Band bending
chemistry
Transition metal
law
Water splitting
Chemical stability
Partial oxidation
Composite material
0210 nano-technology
Subjects
Details
- ISSN :
- 21555435
- Volume :
- 8
- Database :
- OpenAIRE
- Journal :
- ACS Catalysis
- Accession number :
- edsair.doi...........dc8eba7a1fcced41d37c400e6e84b128