Abstract
Gold was supported on commercial ZnO powders (P) and homemade ZnO nanowires (NWs) by a modified deposition-precipitation method. X-ray diffraction and transmission electron microscopy investigation indicated that the size of the Au nanoparticles (NPs) depended strongly on the calcination temperature. The Au NPs were highly dispersed (400°C. Such unique anchoring mechanism accounts for the much better experimentally observed sintering resistance. X-ray photoelectron spectra showed that Au existed as both metallic Au0 and Auδ+ species in all the synthesized catalysts with or without calcination treatment; the ratios of Auδ+/Au0, however, varied, depending on the treatment conditions. Catalytic tests showed that the activity for CO oxidation strongly depended on the size of the Au NPs. After calcination at 600°C, the specific rate for CO oxidation at room temperature decreased about 30 times on Au/ZnO P but only about 4 times on Au/ZnO NW. Stability tests demonstrated that the Au/ZnO NW catalysts had better stability for CO oxidation.
| Original language | English (US) |
|---|---|
| Journal | Journal of Energy Chemistry |
| DOIs | |
| State | Accepted/In press - Dec 18 2015 |
Fingerprint
Keywords
- CO oxidation
- Epitaxy
- Gold
- Nanowires
- Sintering
- Stability
- ZnO
ASJC Scopus subject areas
- Energy Engineering and Power Technology
- Energy (miscellaneous)
- Fuel Technology
- Electrochemistry
Cite this
Highly active and sintering-resistant heteroepitaxy of Au nanoparticles on ZnO nanowires for CO oxidation. / Liu, Jiaxin; Qiao, Botao; Song, Yian; Tang, Hailian; Huang, Yudong; Liu, Jingyue.
In: Journal of Energy Chemistry, 18.12.2015.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Highly active and sintering-resistant heteroepitaxy of Au nanoparticles on ZnO nanowires for CO oxidation
AU - Liu, Jiaxin
AU - Qiao, Botao
AU - Song, Yian
AU - Tang, Hailian
AU - Huang, Yudong
AU - Liu, Jingyue
PY - 2015/12/18
Y1 - 2015/12/18
N2 - Gold was supported on commercial ZnO powders (P) and homemade ZnO nanowires (NWs) by a modified deposition-precipitation method. X-ray diffraction and transmission electron microscopy investigation indicated that the size of the Au nanoparticles (NPs) depended strongly on the calcination temperature. The Au NPs were highly dispersed (400°C. Such unique anchoring mechanism accounts for the much better experimentally observed sintering resistance. X-ray photoelectron spectra showed that Au existed as both metallic Au0 and Auδ+ species in all the synthesized catalysts with or without calcination treatment; the ratios of Auδ+/Au0, however, varied, depending on the treatment conditions. Catalytic tests showed that the activity for CO oxidation strongly depended on the size of the Au NPs. After calcination at 600°C, the specific rate for CO oxidation at room temperature decreased about 30 times on Au/ZnO P but only about 4 times on Au/ZnO NW. Stability tests demonstrated that the Au/ZnO NW catalysts had better stability for CO oxidation.
AB - Gold was supported on commercial ZnO powders (P) and homemade ZnO nanowires (NWs) by a modified deposition-precipitation method. X-ray diffraction and transmission electron microscopy investigation indicated that the size of the Au nanoparticles (NPs) depended strongly on the calcination temperature. The Au NPs were highly dispersed (400°C. Such unique anchoring mechanism accounts for the much better experimentally observed sintering resistance. X-ray photoelectron spectra showed that Au existed as both metallic Au0 and Auδ+ species in all the synthesized catalysts with or without calcination treatment; the ratios of Auδ+/Au0, however, varied, depending on the treatment conditions. Catalytic tests showed that the activity for CO oxidation strongly depended on the size of the Au NPs. After calcination at 600°C, the specific rate for CO oxidation at room temperature decreased about 30 times on Au/ZnO P but only about 4 times on Au/ZnO NW. Stability tests demonstrated that the Au/ZnO NW catalysts had better stability for CO oxidation.
KW - CO oxidation
KW - Epitaxy
KW - Gold
KW - Nanowires
KW - Sintering
KW - Stability
KW - ZnO
UR - http://www.scopus.com/inward/record.url?scp=84963582689&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84963582689&partnerID=8YFLogxK
U2 - 10.1016/j.jechem.2016.03.010
DO - 10.1016/j.jechem.2016.03.010
M3 - Article
JO - Journal of Energy Chemistry
JF - Journal of Energy Chemistry
SN - 2095-4956
ER -