The inhibition of hydrogen and oxygen recombination reaction by halogen atoms on over-all water splitting over Pt-TiO2 photocatalyst
文献类型：期刊论文
| 作者 | Meng Wang1,2,3; Wenlong Zhen1; Bin Tian1,2 ; Jiantai Ma3; Gongxuan Lu1
|
| 刊名 | Applied Catalysis B: Environmental
 |
| 出版日期 | 2018-11 |
| 卷号 | 236期号:0页码:240-250 |
| 关键词 | Halogen Atoms Inhibition Of H2 And O2 Recombination Overall Water Splitting Photocatalyst |
| DOI | 10.1016/j.apcatb.2018.05.031 |
| 英文摘要 | Semiconductor photocatalysts for overall water splitting into H2 and O2 require metal cocatalyst, such as Pt, to catalyze H2 evolution efficiently. However, these metal cocatalysts can also catalyze hydrogen and oxygen recombination to form water. In this paper, we found that the pre-adsorbed halogen atom catalyst could inhibit the reverse reaction of water formation from H2 and O2 due to the decrease of adsorption energies of H2 and O2 on Pt. The adsorption energy decrease of H2 and O2 followed the order of F/Pt < Cl/Pt < I/Pt < Br/Pt. H2-TPD results exhibited similar dependence. This inhibition was achieved via the occupation of halogen atom on the Pt surface sites, and thereby the adsorption and activation of hydrogen and oxygen molecules were decreased. The occupation difference of halogen atoms are determined by radius of halogen ions, which further leads the different activity for H2 and O2 recombination. By inhibition of water formation reverse reaction, the over-all water splitting over various TiO2 photocatalysts has been achieved. Isotope experiments with D2O and H218O confirmed the over-all water splitting to H2 and O2. This study may help scientist to develop high-efficient photocatalyst for overall water splitting. |
| 语种 | 英语 |
| 源URL | [http://210.77.64.217/handle/362003/24456]  |
| 专题 | 兰州化学物理研究所_OSSO国家重点实验室 |
| 通讯作者 | Gongxuan Lu |
| 作者单位 | 1.State key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou, 730000, China 2.University of Chinese Academy of Science, Beijing, 100049, China 3.College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China |
| 推荐引用方式 GB/T 7714 | Meng Wang,Wenlong Zhen,Bin Tian,et al. The inhibition of hydrogen and oxygen recombination reaction by halogen atoms on over-all water splitting over Pt-TiO2 photocatalyst[J]. Applied Catalysis B: Environmental,2018,236(0):240-250. |
| APA | Meng Wang,Wenlong Zhen,Bin Tian,Jiantai Ma,&Gongxuan Lu.(2018).The inhibition of hydrogen and oxygen recombination reaction by halogen atoms on over-all water splitting over Pt-TiO2 photocatalyst.Applied Catalysis B: Environmental,236(0),240-250. |
| MLA | Meng Wang,et al."The inhibition of hydrogen and oxygen recombination reaction by halogen atoms on over-all water splitting over Pt-TiO2 photocatalyst".Applied Catalysis B: Environmental 236.0(2018):240-250. |
入库方式： OAI收割
来源：兰州化学物理研究所
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