期刊
ACS APPLIED NANO MATERIALS
卷 5, 期 10, 页码 15399-15408出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.2c03446
关键词
graphitic carbon nitride; oxygen functional groups; metal-support interaction; cocatalyst; photocatalysis
资金
- National Natural Science Foundation of China [21872041, 21906058, 21978107, 51902357]
- Research Grants Council of Hong Kong [14308018]
- Science and Technology Program of Guangzhou City [202002030287]
- China Postdoctoral Science Foundation [2019M662923]
- Guangdong Outstanding Research Talents International Visiting Program
- Natural Science Foundation of Guangdong Province, China [2019A1515012143]
- Fundamental Research Funds for the Central Universities, Sun Yat-sen University [22lgqb23]
This study investigates the electron transfer between cocatalysts (Pt or Pd) and oxygen-doped carbon nitride (O-CN) with different functional groups. Oxygen functional groups are found to enhance the anchoring of cocatalysts on O-CN. The photocatalytic water splitting results show that O-CN/Pd exhibits higher hydrogen generation activity than O-CN/Pt.
Cocatalysts (Pt or Pd) can significantly enhance the activity of photocatalysts. However, the electron transfer between cocatalysts and different kinds of functional groups have not been thoroughly studied. Here, a strategy of selectively anchoring cocatalysts (Pt or Pd nanoparticles (NPs)) on oxygen-doped carbon nitride (O-CN) was developed to optimize the electron transfer and enhance the photocatalytic activity. The oxygen functional groups are found to be beneficial to the loading of cocatalysts on the surface of O-CN. The adsorption energy (Eads) of Pd NPs on the N-C-O site is more negative than that on the C-O-C site, resulting in a favorable anchoring of Pd NPs on N- C-O, while the Eads of Pt NPs is lower on C-O-C than on N- C-O, leading to a preferential deposition of Pt on C-O-C. The O atom of N-C-O species, which possesses a lower value of isolated state than that of C-O-C species, shows a weaker electron-withdrawal property. So that the electrons can quickly transfer from O-CN to Pd than to Pt, leading to a higher hydrogen generation activity of O-CN/Pd than those of O-CN/Pt by photocatalytic water splitting. This is conducive to understand the interaction between the cocatalysts and O functional group on OCN and the of
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据