上海市磁共振重点实验室

高国梁同学于Catalysis Science & Technology期刊发表文章

发布日期: 2020-06-25   作者:   浏览次数: 61

本实验室高国梁等同学关于光催化分解水的论文《Shape and size effects on photocatalytic hydrogen production via Pd/C3N4 photocatalysts under visible light》被期刊Catalysis Science & Technology接收,通讯作者为姚叶锋老师和王雪璐老师。(DOI10.1039/D0CY00354A)

 

 

Heterogeneous catalysis is one of the most important chemical reactions for studying catalytic nanoparticles with different morphologies. Over the past few decades, researchers have extensively studied the catalytic properties of metals as cocatalysts with controllable size and shape. However, most studies reported so far explore the oxidation or reduction capacity through different reactions. Studies on the crystal surface effect through one reaction system, which provides the possibility to probe the reduction and oxidation reactions induced by the same catalytic process, are relatively lacking. In our experimental study, Pd nanocubes and Pd nanooctahedrons were prepared by a shape and size control technique and were loaded onto a carbon nitride semiconductor photocatalyst. Through a combination of operando nuclear magnetic resonance (NMR) and gas chromatography, the effects of Pd nanoparticles with different crystal planes and sizes on the reduction reaction part and the oxidation reaction part of the photohydrogenation reaction were studied in detail. The results show that the crystal planes affect both the reaction activity and production selectivity of the catalyst, and the size affect more to the reaction activity. This study provides a theoretical support for the design of high-efficiency catalysts and also enriches a test method for studying the performance of catalysts.