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Preparation and comparison of supported gold nanocatalysts on anatase, brookite, rutile, and P25 polymorphs of TiO2 for catalytic oxidation of CO.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Yan, Wenfu Chen, Bei Mahurin, Shannon M. Schwartz, Viviane Mullins, David R. Lupini, Andrew R. Pennycook, S. John Dai, Sheng Overbury, Steven H. |
| Copyright Year | 2005 |
| Abstract | Nanosized anatase (< or = 10 nm), rutile (< or = 10 nm), and brookite (approximately 70 nm) titania particles have been successfully synthesized via sonication and hydrothermal methods. Gold was deposited with high dispersion onto the surfaces of anatase, rutile, brookite, and commercial titania (P25) supports through a deposition-precipitation (D-P) process. All catalysts were exposed to an identical sequence of treatment and measurements of catalytic CO oxidation activity. The as-synthesized catalysts have high activity with concomitant Au reduction upon exposure to the reactant stream. Mild reduction at 423 K produces comparably high activity catalysts for every support. Deactivation of the four catalysts was observed following a sequence of treatments at temperatures up to 573 K. The brookite-supported gold catalyst sustains the highest catalytic activity after all treatments. XRD and TEM results indicate that the gold particles supported on brookite are smaller than those on the other supports following the reaction and pretreatment sequences. |
| Starting Page | 1015 |
| Ending Page | 1019 |
| Page Count | 5 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://stem.ornl.gov/papers/applications/PDFs/Yan_JPCB109_05.pdf?origin=publication_detail |
| Alternate Webpage(s) | https://www.bnl.gov/isd/documents/31287/sh_chem_4.pdf |
| PubMed reference number | 16852296v1 |
| Volume Number | 109 |
| Issue Number | 21 |
| Journal | The journal of physical chemistry. B |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Carbon Monoxide Gold Small anatase brookite enzyme activity neutrophil oxidation |
| Content Type | Text |
| Resource Type | Article |
