通过硫化物进行热催化环氧化,以材料的电催化活性为灵感,用于氧气演变反应
Vanessa Wyss1, Ionel Adrian Dinu1, Laurent Marot2
1Department of Chemistry, University of Basel 4058 Basel Switzerland murielle.delley@unibas.ch.
Catalysis science & technology
|August 14, 2024
概括
地球上丰富的硫化物在催化氧气转移反应中表现出高活性,包括环氧化. 表面氧化硫化物在电催化和热催化中优于其他材料,用于可持续的化学过程.
科学领域:
- 不同质的催化剂.
- 地球上丰富的材料催化剂.
- 可持续的化学可持续的化学
背景情况:
- 硫化是氧化演化反应 (OER) 的活性电催化剂.
- 与氧化物相比,氧化硫化物表面显示出增强的OER活性.
- 这表明硫化物在催化氧转移反应方面具有更广泛的潜力.
研究的目的:
- 研究硫化物作为氧转移反应的热催化剂的潜力.
- 为了比较表面氧化硫化物与其他基催化剂的环氧化活性.
- 阐明观察到的催化活性的机械基础.
主要方法:
- 催化测试硫化物用于循环环烯环氧化.
- 与直接制备的氧化物,氧化物和氧氧化物进行比较.
- 使用过的催化剂的电子磁共振 (EPR) 分析.
- 机械学研究氧化状态的作用.
主要成果:
- 在表面氧化后的硫化物有效催化了环looctene的环氧化.
- 氧化硫化物与其他材料相比,具有更高的环氧化活性.
- 在EPR分析中发现了结构变化和耗尽的催化剂中形成了偏磁性Co (ii) 和Co (iv) 物种.
- 活动归因于高密度的和/或更容易形成高价值的物种.
结论:
- 电催化和热催化知识的结合加速了催化剂的发现.
- 氧化硫化物是一种有希望的地球丰富的催化剂,用于超越OER的氧转移反应.
- 这项工作促进了对可持续过程中基于的催化剂表面化学的理解.
相关概念视频
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