协同材料修饰诱导的界面电荷转移和表面吸附的优化
Mingyan Du1, Lingling Cui1, Panpan Wang2
1School of Materials Science and Engineering, Zhengzhou University, 450001, P.R. China. xiaolizhang.z@gmail.com.
Nanoscale
|September 13, 2023
概括
二氧化 (TiO2) 用和碳 (FNT) 进行了修改,以改善光催化的演化. FNT材料的效率提高了33倍,稳定性非常好.
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.
- 可再生能源可再生能源是可再生能源.
背景情况:
- 二氧化 (TiO2) 是一个有前途的光催化剂,因为它的稳定性和低成本.
- 然而,其宽带间隙和电荷载体重组限制了其在进化反应 (HER) 中的效率.
研究的目的:
- 为了提高TiO2.2的光催化演化反应 (HER) 效率.
- 为了解决诸如高吸附能量和电荷载体重组等局限性.
主要方法:
- 使用密度函数理论 (DFT) 的计算.
- 使用兴奋剂和化碳 (FNT) 的超薄盾牌进行了TiO2的合理修饰.
主要成果:
- 协同修改优化了H吸附和界面电荷转移.
- FNT光催化剂实现了HER效率为13.0 mmol g-1 h-1,比原始TiO2增加了33倍.
- 复合材料在66小时的循环测试中表现出极好的稳定性.
结论:
- FNT复合物有效地增强了TiO2对HER的光催化活性.
- 这些修改可以防止催化剂腐蚀,并改善电荷载体动力学.
- 这种方法为高效和稳定的光催化生产提供了一个有前途的战略.
相关概念视频
Reduction of Alkenes: Catalytic Hydrogenation
Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the surface of...
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the surface of...
Heterogeneous Catalysis
Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...


