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Stable Rhodium (IV) Oxide for Alkaline Hydrogen Evolution Reaction
- Source :
- Advanced materials (Deerfield Beach, Fla.). 32(25)
- Publication Year :
- 2019
-
Abstract
- Water electrolysis in alkaline electrolyte is an attractive way toward clean hydrogen energy via the hydrogen evolution reaction (HER), whereas the sluggish water dissociation impedes the following hydrogen evolution. Noble metal oxides possess promising capability for catalyzing water dissociation and hydrogen evolution; however, they are never utilized for the HER due to the instability under the reductive potential. Here it is shown that compressive strain can stabilize RhO2 clusters and promote their catalytic activity. To this end, a strawberry-like structure with RhO2 clusters embedded in the surface layer of Rh nanoparticles is engineered, in which the incompatibility between the oxide cluster and the metal substrate causes intensive compressive strain. As such, RhO2 clusters remain stable at a reduction potential up to -0.3 V versus reversible hydrogen electrode and present an alkaline HER activity superior to commercial Pt/C.
- Subjects :
- Materials science
Electrolysis of water
Mechanical Engineering
Oxide
02 engineering and technology
Electrolyte
engineering.material
010402 general chemistry
021001 nanoscience & nanotechnology
Electrocatalyst
01 natural sciences
Dissociation (chemistry)
0104 chemical sciences
Catalysis
chemistry.chemical_compound
chemistry
Chemical engineering
Mechanics of Materials
engineering
Reversible hydrogen electrode
General Materials Science
Noble metal
0210 nano-technology
Subjects
Details
- ISSN :
- 15214095
- Volume :
- 32
- Issue :
- 25
- Database :
- OpenAIRE
- Journal :
- Advanced materials (Deerfield Beach, Fla.)
- Accession number :
- edsair.doi.dedup.....9dc4a3477208483d2f7a9a975e97e378