氧化和之间的反应 (IV) 酸在水溶液中的反应
Negah Hashemi1, Subhajit Nandy2, Pavlo Aleshkevych3
1Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran.
Inorganic chemistry
|July 18, 2023
概括
(IV) 酸氧化氧化,使高效的水氧化反应成为可能. 这项研究揭示了氧化储存氧化相当于低激活能量通路,对于水氧化催化是至关重要的.
科学领域:
- 催化剂是一种催化剂.
- 无机化学 无机化学 有机化学
- 电化学 电化学 电化学
背景情况:
- (IV) 酸 (CAN) 是水氧化催化剂 (WOC) 的常见牺牲性氧化剂.
- 氧化是研究得很好的WOC,但其与CAN对水氧化的反应机制很少被探索.
研究的目的:
- 用氧化物和CAN.来研究水氧化反应 (WOR) 机制.
- 为了阐明氧化在WOR期间CAN存在中的作用.
主要方法:
- 在现场拉曼光谱学.
- 在现场的X射线吸收光谱学.
- 在现场电子偏磁共振光谱学.
主要成果:
- 该机制涉及CAN氧化β-Ni(OH) 2到γ-NiO(OH),然后演变为氧气.
- β-Ni(OH) 2 作为来自 CAN 的四个氧化等价物的储存,促进低激活能四电子 WOR.
- 在最佳条件 (0.10 M CAN) 下,在1000秒的时间内,转频率为5.5 × 10−5/s,转数为2.0 × 10−2 mol ((O2) / mol ((Ni)) 的转率为2.0 × 10−2 mol ((O2) / mol ((Ni)).
- 发现Ni(OH2) 62+(aq) 是一种分解产物,不能被氧化成γ-NiO(OH).
结论:
- 氧化,当被CAN氧化时,便于有效的水氧化路径.
- 该研究提供了对CAN和氧化在水氧化中的协同作用的机制性见解.
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