了解基预催化剂对尿素氧化反应活动的影响
Haipeng Liu1,2, Peike Wang1,2, Xue Qi1,2
1Shenzhen Key Laboratory of Flexible Printed Electronics Technology, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China.
催化剂对于尿素氧化反应 (UOR) 是非常好的. 预催化剂结构显著影响了真正的Ni3+活性位点的活性,无形 tungstate表现出卓越的性能.
科学领域:
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
背景情况:
- 基于的催化剂在性介质中的尿素氧化反应 (UOR) 中非常有效.
- 据信,UOR的活性部位是在现场形成的Ni3+部分中,使用的催化剂充当前催化剂.
- 了解预催化剂的作用对于设计改进的基UOR催化剂至关重要.
研究的目的:
- 研究不同前催化剂结构对UOR中Ni3+活性位点活性的影响.
- 为了合成和表征五种不同离子的基预催化剂.
- 为了将预催化剂特性与UOR催化性能相关联.
主要方法:
- 制造五种基预催化剂:β-Ni(OH) 2,Ni-CO3,Ni-SiO3,Ni-MoO4和Ni-WO4,通过将Ni2+与不同的离子 (OH−,CO32−,SiO32−,MoO42−,WO42−) 结合.
- 在性介质中合成的尿素氧化反应 (UOR) 前催化剂的电化学评估.
- 分析了前催化剂结构,Ni3+活性部位特征和UOR活性之间的关系.
主要成果:
- 所有五种预催化剂都形成了相同的现场Ni3+活性位,但表现出不同的UOR活动.
- 前催化剂结构既影响活性部位的数量,也影响每个活性部位的活性.
- 无形黄酸在每个活性位点表现出最高的活性,为UOR.在1.6V时达到158.10mA·cm−2.
结论:
- 前催化剂通过影响活跃的Ni3+位点,在确定整体UOR活动方面发挥着关键作用.
- 无形 tungstate 是一个非常有前途的预催化剂高效的UOR.
- 这项研究为UOR的先进基催化剂的合理设计提供了宝贵的见解.
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