基于氧化的Z方案,用于从水分裂中以可见光驱动的气生产
Madasamy Thangamuthu1, Kiran Vankayala1, Lunqiao Xiong1
1Department of Chemical Engineering, University College London, Torrington Place, London WC1E 7JE, U.K.
ACS catalysis
|July 13, 2023
概括
这项研究引入了一种新的Z-方案系统,仅使用氧化来实现高效的太阳能驱动水分. 该系统实现了选择性和氧生产,提供了更安全的光化学过程.
科学领域:
- 材料科学 材料科学 材料科学
- 光催化作用的光催化
- 可再生能源可再生能源是可再生能源.
背景情况:
- 太阳能驱动的水分是可再生能源的关键.
- 传统的Z模式系统需要多种类型的光催化剂.
- 开发高效和选择性的水分系统是必不可少的.
研究的目的:
- 开发一种新的Z-方案系统,用于只使用氧化的可见驱动水分离.
- 为了实现高效和选择性的 (H2) 和氧 (O2) 的生产.
- 研究中性和性溶液中选择性H2和O2演变的机制.
主要方法:
- 使用氧化铜 (Na0.56WO3-) 和二维氧化三氧化物 (WO3) 纳米片制造Z-方案系统.
- 在中性和性水溶液中使用可见光驱动的水分裂实验.
- 分析H2和O2的演化速率,摩尔比率和明显的量子产量.
- 密度函数理论 (DFT) 计算和实验证据用于研究吸附机制.
主要成果:
- 只有氧化的Z-方案系统实现了高效的H2 (14μmol h-1) 和O2 (6.9μmol h-1) 生产.
- 理想的H2:O2摩尔比为2:1得到了.
- 在中性条件下,在420nm处记录了6.06%的高表面量子产量.
- 确定 (I-) 在Na0.56WO3-和 (IO3-) 在WO3上的选择性吸附是关键机制.
结论:
- 一个强大而高效的Z-scheme系统可见驱动水分成功地使用仅氧化物构建.
- 该系统展示了选择性的H2和O2演变,这对于安全和实际应用至关重要.
- 由DFT计算支持的优先吸附机制解释了该系统的高选择性.
- 这种方法为通过光催化剂安全高效地生产和氧提供了一个有前途的途径.
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