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Phase-Transformation of Hexagonal Cu2S Microplates to Nanoparticle-Confined Cu2O Microplates at Low Temperatures and their Electro-Catalytic Property for Methanol Oxidation
Chemical Physics ( IF 2.3 ) Pub Date : 2019-11-13 , DOI: 10.1016/j.chemphys.2019.110602
Jaeyoung Hwang , Kang Yeol Lee

The direct phase transformation of hexagonal Cu2S microplates to those that are S-included Cu2O was induced by low-temperature annealing at 200 °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 °C for 12 h (Cu2S-Cu2O-12h), 24 h (Cu2S-Cu2O-24h,), and 48 h (Cu2S-Cu2O-48h) showed electro-catalytic activities for methanol oxidation. The Cu2S-Cu2O-24h microplates showed the best electro-catalytic activity and long-term stability.



中文翻译:

六角形Cu 2 S微孔板在低温下向纳米级Cu 2 O微孔板的相变及其对甲醇氧化的电催化性能

六边形Cu的直接相变2小号微孔板于那些S-含有Cu 2 O的在200℃下在环境条件下诱导低温退火。Cu 2 O微板显示出纳米颗粒限制的结构,该结构继续具有原始Cu 2 S微板的六边形骨架。表征了合成的Cu 2 S和含S的Cu 2 O微板的组成分布,尺寸,结构和光学性质。在S-含有Cu 2个ö微孔板通过低温退火制备在200℃下12小时(CU 2 S-的Cu 2 O形12H),24小时(铜2S-Cu 2 O-24h,和48 h(Cu 2 S-Cu 2 O-48h)显示了甲醇氧化的电催化活性。Cu 2 S-Cu 2 O-24h微孔板显示出最佳的电催化活性和长期稳定性。

更新日期:2019-11-13
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