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Surface Charge Polarization at the Interface: Enhancing the Oxygen Reduction via Precise Synthesis of Heterogeneous Ultrathin Pt/PtTe Nanowire
- Source :
- Chemistry of Materials. 28:8890-8898
- Publication Year :
- 2016
- Publisher :
- American Chemical Society (ACS), 2016.
-
Abstract
- Heterointerface tailoring is of importance for the catalytic activity enhancement of nanomaterials in various reactions owing to the charge polarization at the interface. We report an accurate manipulation of a replacement reaction for Pt/PtTe heteronanowire and PtTe homonanowire fabrication. Their geometric structures are controlled by using the aged K2PtCl4 in ethylene glycol (EG) as Pt precursors with self-tuned coordination state and structure. The aging process enables the slow conversion of PtCl42– to linear structured PtmCln leading to their tunable oxidation ability. The Pt–Pt bond formation during aging has been revealed by time-resolved in situ UV–vis and X-ray absorption fine structure (XAFS) spectroscopies. The coexistence of a highly active Te template, PtCl42– ions, and linear structured PtmCln complexes allows Pt nanoparticles (NPs) to grow in situ on the PtTe nanowires (NWs), forming a controllable interface structure that served as catalytic active sites and charge transfer location. In c...
- Subjects :
- Materials science
General Chemical Engineering
Nanowire
Nanotechnology
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
X-ray absorption fine structure
Catalysis
Nanomaterials
chemistry.chemical_compound
Chemical engineering
chemistry
Materials Chemistry
Single displacement reaction
Surface charge
0210 nano-technology
Polarization (electrochemistry)
Ethylene glycol
Subjects
Details
- ISSN :
- 15205002 and 08974756
- Volume :
- 28
- Database :
- OpenAIRE
- Journal :
- Chemistry of Materials
- Accession number :
- edsair.doi...........fcaef5ef5cc1721553d671d7907f4c46