(IV) 碳酸盐复合物:通过添加二氧化碳来形成
Danila Vasilchenko1, Sergey Tkachev1, Pavel Tkachenko1,2
1Siberian Branch of the Russian Academy of Science, Nikolaev Institute of Inorganic Chemistry, 630090 Novosibirsk, Russia.
Inorganic chemistry
|June 9, 2023
概括
这项研究详细介绍了碳酸盐溶液中的物种化,从而导致先进催化剂的PtO2纳米粒子形成. 这些-催化剂有效地从酸水合物中产生,并观察到一种新的光催化增强.
科学领域:
- 无机化学 无机化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 在碳酸盐溶液中了解的物种化对于开发新材料至关重要.
- (IV) 种可以经过凝结,形成二氧化纳米颗粒.
- 这些纳米粒子在异质催化中具有潜在的应用.
研究的目的:
- 为了研究用 (IV) 氧化和二氧化碳或碳酸盐制备的溶液中的的物种化.
- 开发含的异质催化剂,用于水酸分解.
- 评估这些新型催化剂的催化活性和选择性.
主要方法:
- 多核核磁共振光谱被用于物种分析.
- 密度函数理论的计算被用来建模的协调复合体.
- 双金属-催化剂通过纳米粒子沉积在各种支架 (CeO2,SiO2,g-C3N4) 上进行合成.
主要成果:
- 确定了与 κ1 和 κ2 协调模式共存的 Pt(IV) 碳酸盐复合体.
- 通过单核Pt物种的凝结形成了PtO2纳米粒子,导致沉物形成.
- Pt-Ni/CeO2催化剂在氨酸-酸盐分解过程中表现出高的选择性和活性,产生H2.
- PtNi/CeO2在50°C的温度下达到4600的周转率,具有97%的H2选择性.
- 在光驱分解条件下,PtNi/g-C3N4表现出40%的生产力提升.
结论:
- 该研究成功阐明了碳酸盐介质中的物种化及其在PtO2纳米粒子形成中的作用.
- 开发的Pt-Ni/支持催化剂对于从酸中生产气非常有效.
- 光催化增强为改善水分解中的催化剂性能提供了一个有希望的途径.
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