Surface Spectroscopic Analysis of TiO2 and ZnO Nanoparticles Doped with Noble Metalsopen access
- Authors
- Lee, Hangil; Hong, Jung A.
- Issue Date
- Aug-2018
- Publisher
- SPRINGER/PLENUM PUBLISHERS
- Keywords
- Noble-metal-doped metal oxide; Catalyst; Defect structure; Photocatalytic oxidation; HRPES; Electrochemistry
- Citation
- TOPICS IN CATALYSIS, v.61, no.12-13, pp 1257 - 1262
- Pages
- 6
- Journal Title
- TOPICS IN CATALYSIS
- Volume
- 61
- Number
- 12-13
- Start Page
- 1257
- End Page
- 1262
- URI
- https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/2017
- DOI
- 10.1007/s11244-018-0980-8
- ISSN
- 1022-5528
1572-9028
- Abstract
- Nanoparticles (NPs) of the well-known photocatalysts TiO2 and ZnO each doped with noble metals (NM = Au, Pd, or Pt) were synthesized by applying a thermosynthetic method, and the catalytic activities of the resulting six samples were compared. After characterizing them by using high-resolution photoemission spectroscopy (HRPES), we evaluated the catalytic effects of the samples the oxidation of 4-aminothiophenol (4-ATP) by using HRPES under UV illumination and on the oxidation of 4-ATP in aqueous solution by taking electrochemistry measurements. In addition, we determined the rates of conversion of CO to CO2 in the presence of these catalysts by using a residual gas analyzer under an ultra-high vacuum condition. As a result, we found a good positive correlation between the numbers of defect structures induced by the doped noble metals and the catalytic activity, and showed that Pd-TiO2 and Pt-ZnO NPs can act as efficient catalysts due to their relatively large number of defect structures and corresponding oxygen vacancies. [GRAPHICS] .
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