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Photocatalytic $H_{2}O_{2}$ Generation Using Au-Ag Bimetallic Alloy Nanoparticles loaded on ZnO
| Content Provider | MDPI |
|---|---|
| Author | Pang, Xinzhu Skillen, Nathan Bahnemann, Detlef W. Rooney, David W. Robertson, Peter K. J. |
| Copyright Year | 2022 |
| Description | Hydrogen peroxide $(H_{2}O_{2}$) is an important chemical as it is an environmentally friendly oxidant for organic synthesis and environmental remediation as well as a promising candidate for the liquid fuel. Photocatalytic generation of $H_{2}O_{2}$ is sustainable, and many efforts have been put into the development of new catalysts to gain high $H_{2}O_{2}$ yields. In this investigation, Au/ZnO, Ag/ZnO and Au-Ag/ZnO catalysts were prepared by the simultaneous impregnation of $HAuCl_{4}$ and $AgNO_{3}$ and they were used to generate $H_{2}O_{2}$ from a $methanol/O_{2}$ system. It was demonstrated that Au/ZnO had the best performance at generating $H_{2}O_{2}$. The presence of Au on ZnO accelerated the generation of $H_{2}O_{2}$ on ZnO and facilitated $H_{2}O_{2}$ adsorption onto the catalyst surface, which resulted in the reaction kinetics changing from zero-order to first-order. Ag atoms on Ag/ZnO were unstable and would strip from the surface of ZnO during irradiation, decreasing the yield of $H_{2}O_{2}$. The stabilization of Ag on Au-Ag/ZnO depended on the ratio of Au and Ag. $Au_{0.1}Ag_{0.2}$/ZnO was a stable catalyst and it showed that the presence of Ag promoted the formation and decomposition of peroxide, simultaneously. |
| Starting Page | 939 |
| e-ISSN | 20734344 |
| DOI | 10.3390/catal12090939 |
| Journal | Catalysts |
| Issue Number | 9 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-08-24 |
| Access Restriction | Open |
| Subject Keyword | Catalysts Applied Chemistry Photocatalysis Oxygen Reduction Hydrogen Peroxide Au/zno Au-ag/zno |
| Content Type | Text |
| Resource Type | Article |
