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连续选择性氧化甲到甲醇的热辅助光催化在NiO/ZnO
Wen-Jing Wang1, Hao-Nan Zhang2, Peng Xu3
1State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, China; College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
Journal of colloid and interface science
|June 18, 2025
概括
本研究介绍了一种热辅助的光催化过程,用于将甲转化为甲醇. NiO/ZnO催化剂系统在温和条件下实现了高产量和选择性,证明了长期稳定性.
科学领域:
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 选择性甲氧化成甲醇至关重要,但由于过度氧化而具有挑战性.
- 温和条件的催化工艺在能源效率和安全方面非常受欢迎.
研究的目的:
- 开发一种连续的热辅助光催化工艺,用于选择性氧化甲到甲醇.
- 调查NiO/ZnO催化剂和热辅助在增强反应中的作用.
主要方法:
- 使用流量固定床反应堆进行连续的甲氧化.
- 采用了NiO/ZnO催化剂,并应用了热辅助光催化剂.
- 在现场进行了电子磁共振 (EPR),时间解析的衰变光谱和短暂光电分析.
主要成果:
- 达到47.5μmolg-1的甲醇产量,具有94.7%的选择性.
- 长期稳定性超过120小时.
- 观察到与光催化剂单独相比,热辅助的甲醇产量增加了16.49倍.
结论:
- 热辅助显著增强光生成载体生成,迁移和甲激活.
- 的NiO修饰促进了氧气空缺和电子转移,而NiO纳米粒子则促进了孔转移.
- 一个协同的双站点电荷转移机制与热辅助相结合,改善了电子孔对的分离和整体甲氧化效率.
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