Effect of Hydrogen and Oxygen Evolution Cocatalysts on Photocatalytic Activity of GaN : ZnO
Effect of Hydrogen and Oxygen Evolution Cocatalysts on Photocatalytic Activity of GaN : ZnO
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析氢析氧助催化剂对 GaN : ZnO 光催化活性的影响
DOI：
10.1002/ejic.201300439
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
et al.
中科院分区：
文献类型：
--
作者：
A. Xiong;T. Teranishi;T. Yoshinaga;et al.
以GaN和ZnO的固溶体（以下简称GaN：ZnO）为光催化剂，研究了析氢和析氧助催化剂对水裂解反应的影响.采用纳米Mn 3 O 4、RuO 2和IrO 2作为析氧助催化剂，采用核壳型Rh/Cr2 O3复合物作为析氢助催化剂对GaN：ZnO进行改性。共着色样品的光催化活性高于单独用O2或H2析出助催化剂改性的样品。在优化的负载量下，三种析氧助催化剂的活性增强效果相当。负载更有效的Rh/Cr2 O3助催化剂制备的Rh纳米粒子的吸附进一步提高了光催化活性。得出的结论是，同时改善氧化和还原反应是有效的，在提高GaN：ZnO的光催化活性，而还原反应限制了coloaded系统的整体反应速率更显着。
The coloading effect of H2and O2evolution cocatalysts on the overall water splitting reaction was investigated using a solid solution of GaN and ZnO (hereafter termed GaN:ZnO) as a photocatalyst. GaN:ZnO was modified with nanoparticulate Mn3O4, RuO2, and IrO2as O2evolution cocatalysts and with core/shell‐type Rh/Cr2O3composites as H2evolution cocatalysts. The photocatalytic activity of the coloaded samples for overall water splitting was higher than that of the samples modified with either of the O2or H2evolution cocatalysts alone. The activity enhancement induced by coloading was comparable for the three O2evolution cocatalysts investigated at the optimized loading amounts. Loading of a more efficient Rh/Cr2O3cocatalyst prepared by adsorption of Rh nanoparticles further improved the photocatalytic activity. It was concluded that a simultaneous improvement in both oxidation and reduction reactions was effective at enhancing the photocatalytic activity of GaN:ZnO, whereas the reduction reactions limited the overall reaction rate of the coloaded system more significantly.