Catalytically active interfaces in titania nanorod-supported copper catalysts for CO oxidation
dc.contributor.author | Khan W | |
dc.contributor.author | Chen SS | |
dc.contributor.author | Tsang DCW | |
dc.contributor.author | Teoh WY | |
dc.contributor.author | Hu X | |
dc.contributor.author | Lam FLY | |
dc.contributor.author | Yip ACK | |
dc.date.accessioned | 2020-01-27T21:09:27Z | |
dc.date.available | 2020-01-27T21:09:27Z | |
dc.date.issued | 2020 | en |
dc.date.updated | 2020-01-09T03:35:30Z | |
dc.description.abstract | One-dimensional titanium dioxide nanorod (TNR)-supported Cu catalysts (2.5-12.5 wt%) were synthesized using deposition-precipitation. X-ray photoelectron spectroscopy, temperature programmed reduction and CO chemisorption measurements showed that Cu doping over TNR offered metal-support interactions and interfacial active sites that had a profound impact on the catalytic performance. The role of the Cu-TNR interface was investigated by comparing the catalytic activity of Cu-TNR catalysts with that of pure CuO nanoparticles in CO oxidation. The presence of highly dispersed copper species, a high number of interfacial active sites, CO adsorption capacity and surface/lattice oxygen were found to be responsible for the excellent activity of 7.5Cu-TNR (i.e., Cu loading of 7.5 wt% on TNR). Moreover, the Cu-TNR catalysts followed the Langmuir-Hinshelwood reaction mechanism with 7.5Cu-TNR, exhibiting an apparent activation energy of 44.7 kJ/mol. The TNR-supported Cu catalyst gave the highest interfacial catalytic activity in medium-temperature CO oxidation (120 – 240 °C) compared to other commonly used supports, including titanium dioxide nanoparticles (TiO2-P25), silica (SiO2) and alumina (Al2O3) in which copper species were nonhomogeneously dispersed. This study confirms that medium-temperature CO oxidation is highly sensitive to the morphology and structure of the supporting material. | en |
dc.identifier.citation | Khan W, Chen SS, Tsang DCW, Teoh WY, Hu X, Lam FLY, Yip ACK (2020). Catalytically active interfaces in titania nanorod-supported copper catalysts for CO oxidation. Nano Research. | en |
dc.identifier.issn | 1998-0000 | |
dc.identifier.uri | http://hdl.handle.net/10092/17913 | |
dc.language.iso | en | |
dc.subject | supported catalysts | en |
dc.subject | nanorod | en |
dc.subject | oxygen species | en |
dc.subject | interfacial active sites | en |
dc.subject | CO oxidation | en |
dc.subject.anzsrc | Fields of Research::40 - Engineering::4004 - Chemical engineering::400408 - Reaction engineering (excl. nuclear reactions) | en |
dc.subject.anzsrc | Fields of Research::34 - Chemical sciences::3406 - Physical chemistry::340601 - Catalysis and mechanisms of reactions | en |
dc.subject.anzsrc | Fields of Research::40 - Engineering::4018 - Nanotechnology::401807 - Nanomaterials | en |
dc.title | Catalytically active interfaces in titania nanorod-supported copper catalysts for CO oxidation | en |
dc.type | Journal Article | en |
uc.college | Faculty of Engineering | |
uc.department | Chemical and Process Engineering |
Files
Original bundle
1 - 1 of 1
No Thumbnail Available
- Name:
- Nano_Res_Khan et al_UC Repository.docx
- Size:
- 3.8 MB
- Format:
- Unknown data format
- Description:
- Accepted version