在可见光下轻微脱氧化硫氧化物与氧化混合物,显著增强活性
Yasutaka Kuwahara1,2, Yukihiro Yoshimura1, Kohei Haematsu1
1Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University , 2-1 Yamada-oka , Suita , Osaka 565-0871 , Japan.
Journal of the American Chemical Society
|June 19, 2018
概括
这项研究引入了一种与纳米粒子 (Pt/HxMoO3−γ) 合的新型等离子铜催化剂. 这种催化剂有效地使用可见光去氧化硫化物,从而提供更绿色的硫化物合成.
科学领域:
- 材料科学
- 催化剂
- 摄影化学
背景情况:
- 采集太阳光用于有机合成仍然是一个重大挑战.
- 与贵金属相结合的等离子氧化物材料为有效利用太阳能在催化过程中提供了有前途的途径.
研究的目的:
- 展示一个新的等离子催化剂, 以太阳能驱动有机合成.
- 在可见光下研究Pt/HxMoO3−γ的催化性能和机制.
主要方法:
- 通过简单的H溢出过程合成等离子氧化混合物 (Pt/HxMoO3−γ).
- 用H2在室温下对硫氧化物和氧化物进行催化脱氧.
- 在可见光照射和黑暗条件下进行比较研究.
- 综合分析包括氧空位和氧化还原性质的表征.
主要成果:
- 在硫氧化物脱氧中,Pt/HxMoO3−γ具有较高的催化性能,在可见光下显著增强活性.
- 催化剂对各种硫酸盐和酸盐具有很好的选择性.
- 由H溢出引发的氧气空缺被确定为关键活跃地点.
- 在556nm左右强的等离子吸收和可逆的Mo氧化还原特性对于反应至关重要.
结论:
- 开发的Pt/HxMoO3−γ催化剂为在温和条件下从硫化物中产生硫化物提供了高效和更环保的方案.
- 可见光照射显著提高了催化效率,证明了有效的太阳能利用.
- 这项工作为设计基于等离子体的催化系统开辟了新的途径,
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