Phase-transformation of hexagonal Cu2S microplates to nanoparticle-confined Cu2O microplates at low temperatures and their electro-catalytic property for methanol oxidation
- Authors
- Hwang, Jaeyoung; Lee, Kang Yeol
- Issue Date
- 1-Feb-2020
- Publisher
- ELSEVIER
- Keywords
- Hexagonal Cu2S microplates; Phase-transformation; S-included Cu2O microplates; Methanol oxidation; Electro-catalytic activity
- Citation
- CHEMICAL PHYSICS, v.530
- Journal Title
- CHEMICAL PHYSICS
- Volume
- 530
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/17610
- DOI
- 10.1016/j.chemphys.2019.110602
- ISSN
- 0301-0104
- Abstract
- The direct phase transformation of hexagonal Cu2S microplates to those that are S-included Cu2O was induced by low-temperature annealing at 200 degrees C under ambient conditions. The Cu2O microplates showed a nanoparticle-confined structure, which continued to have the hexagonal framework of the original Cu2S microplates. The compositional distributions, sizes, structures, and optical properties of the synthesized Cu2S and S-included Cu2O microplates were characterized. The S-included Cu2O microplates prepared via low-temperature annealing at 200 degrees C for 12 h (Cu2S-Cu2O-12 h), 24 h (Cu2S-Cu2O-24 h), and 48 h (Cu2S-Cu2O-48 h) showed electro-catalytic activities for methanol oxidation. The Cu2S-Cu2O-24 h microplates showed the best electro-catalytic activity and long-term stability.
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