通过 π-π 型轨道合来操纵脊柱八面体位的旋转状态,以促进水的氧化
Zhangtao Guo1, Qian Zhu1, Shaohua Wang1
1State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin Provincial International Cooperation Key Laboratory of Advanced Inorganic Solid Functional Materials, College of Chemistry, Jilin University, Changchun, 130012, China.
Angewandte Chemie (International ed. in English)
|June 26, 2024
概括
我们使用π-π轨道合优化了Co3O4/CeO2催化剂中的旋状态. 这提高了水的氧化性能,实现了高效的能量转换的低过量潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 无机化学 无机化学
背景情况:
- 在活性金属位点中精确操纵旋转状态对于催化剂反应性至关重要,但仍然具有挑战性.
- 氧化物是有前途的催化剂,但它们的性能受到特定几何位置的旋转状态控制的限制.
研究的目的:
- 为了调节八面体位 (CoOh) 在Co3O4/CeO2复合材料中的旋转状态.
- 研究Co,O和Ce之间的π-π轨道合在优化催化剂性能方面的作用.
- 通过调整催化剂的电子结构来实现卓越的水氧化性能.
主要方法:
- 制造具有不同CeO2含量的Co3O4/CeO2复合材料.
- 在3d (Co),2p (O) 和4f (Ce) 轨道之间利用了π-π型轨道合.
- 使用晶体轨道汉密尔顿人口和状态计算的部分密度来表征电子结构.
主要成果:
- 通过调整CeO2的内容,实现了CoOh的54.7%的高旋转比,优化了eg轨道填充.
- 优化的催化剂表现出了卓越的氧化水性能,在10 mA cm-2时具有251 mV的超电位.
- 确认了从O 2p到Ce 4f轨道的π捐赠,促进了电子跳跃和自旋状态调制.
结论:
- π-π轨道合策略有效地调节了Co3O4/CeO2复合材料中的旋状态.
- 优化的自旋状态显著增强了水氧化催化活性,与最先进的基氧化物相竞争.
- 这项研究为在先进催化剂中利用4f和3d轨道合来进行旋转状态工程提供了基本的见解.
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