光催化
掺杂剂
催化作用
材料科学
半导体
纳米技术
色散(光学)
分解水
Atom(片上系统)
吸附
复合数
电荷(物理)
光化学
兴奋剂
化学工程
化学
光电子学
计算机科学
物理化学
工程类
复合材料
嵌入式系统
有机化学
物理
光学
量子力学
作者
Chengjie Li,Xuanpu Dong,Yingchao Zhang,Jing Hu,Jinxiu Yuan,Guofu Li,Di Chen,Yuning Li
标识
DOI:10.1016/j.apsusc.2022.153471
摘要
Loading single atom (SA) cocatalysts onto semiconductors offers great potential for improving the photocatalytic performance. Here, we report a simple micro-tailoring strategy that cuts g-C3N4 into small pieces and oligomers. Defects, boundaries, dopants and terminal groups created could confine Ru SAs stably onto the framework, ensuring uniform dispersion of Ru SAs on the tailored g-C3N4. The as-prepared composite, the tailored g-C3N4 loaded with Ru SAs, showed a dramatic increase photocatalytic activity for H2 evolution (4052.1 μmol h−1 g−1) compared to the composite of the non-tailored g-C3N4 loaded with Ru (394.3 μmol h−1 g−1). The enhanced catalytic activity was achieved by the metal-support interaction between the Ru atoms and the tailored g-C3N4, which could manipulate local charge distribution, thus promoting the adsorption of intermediates and enabling efficient charge transfer. In addition, atomic Ru-sites could provide directional charge transfer channels and targeting sites to facilitate rapid photo-introduced charge transfer and water reduction reaction. The proposed strategy provides a facile and feasible way for the construction of atomically dispersed catalysts for efficient photocatalytic H2 evolution and other reactions.
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