Abstract
Hydrothermally synthesized CuxO exhibited improved performance for CO oxidation compared to the hydrothermally synthesized Cu2O, as well as commercial CuO nanoparticles. Hydrothermally synthesized CuxO predominantly consists of CuO, but it also contains a small contribution from Cu2O, as well as Cu2(OH)3(NO3) (before annealing). After annealing, only CuO and Cu2O phases are present, and the T50 value is significantly improved from 179 °C to 149 °C, and the T50 value of annealed hydrothermal CuxO remains practically unchanged for 3 catalytic cycles. The improved performance of hydrothermal CuxO can be attributed to its composition and surface properties. The ratio of lattice oxygen to surface oxygen (oxygen in surface adsorbates, surface states, and defects) increases after the first CO oxidation reaction for all samples except commercial CuO nanoparticles, which exhibit steady decrease with increased cycling. In addition, pure Cu2O irreversibly changes to CuO after CO oxidation reaction, but its catalytic performance after the first cycle is significantly improved compared to commercial CuO nanoparticles.
| Original language | English |
|---|---|
| Pages (from-to) | 3627-3632 |
| Number of pages | 6 |
| Journal | Journal of Materials Chemistry A |
| Volume | 3 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - Feb 21 2015 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Chemistry(all)
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
Cite this
Hydrothermally synthesized CuxO as a catalyst for CO oxidation. / Guo, Mu Yao; Liu, Fangzhou; Tsui, Jenkin; Voskanyan, Albert A.; Ng, Alan Man Ching; Djurišić, Aleksandra B.; Chan, Wai Kin; Chan, Kwong Yu; Liao, Changzhong; Shih, Kaimin; Surya, Charles.
In: Journal of Materials Chemistry A, Vol. 3, No. 7, 21.02.2015, p. 3627-3632.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Hydrothermally synthesized CuxO as a catalyst for CO oxidation
AU - Guo, Mu Yao
AU - Liu, Fangzhou
AU - Tsui, Jenkin
AU - Voskanyan, Albert A.
AU - Ng, Alan Man Ching
AU - Djurišić, Aleksandra B.
AU - Chan, Wai Kin
AU - Chan, Kwong Yu
AU - Liao, Changzhong
AU - Shih, Kaimin
AU - Surya, Charles
PY - 2015/2/21
Y1 - 2015/2/21
N2 - Hydrothermally synthesized CuxO exhibited improved performance for CO oxidation compared to the hydrothermally synthesized Cu2O, as well as commercial CuO nanoparticles. Hydrothermally synthesized CuxO predominantly consists of CuO, but it also contains a small contribution from Cu2O, as well as Cu2(OH)3(NO3) (before annealing). After annealing, only CuO and Cu2O phases are present, and the T50 value is significantly improved from 179 °C to 149 °C, and the T50 value of annealed hydrothermal CuxO remains practically unchanged for 3 catalytic cycles. The improved performance of hydrothermal CuxO can be attributed to its composition and surface properties. The ratio of lattice oxygen to surface oxygen (oxygen in surface adsorbates, surface states, and defects) increases after the first CO oxidation reaction for all samples except commercial CuO nanoparticles, which exhibit steady decrease with increased cycling. In addition, pure Cu2O irreversibly changes to CuO after CO oxidation reaction, but its catalytic performance after the first cycle is significantly improved compared to commercial CuO nanoparticles.
AB - Hydrothermally synthesized CuxO exhibited improved performance for CO oxidation compared to the hydrothermally synthesized Cu2O, as well as commercial CuO nanoparticles. Hydrothermally synthesized CuxO predominantly consists of CuO, but it also contains a small contribution from Cu2O, as well as Cu2(OH)3(NO3) (before annealing). After annealing, only CuO and Cu2O phases are present, and the T50 value is significantly improved from 179 °C to 149 °C, and the T50 value of annealed hydrothermal CuxO remains practically unchanged for 3 catalytic cycles. The improved performance of hydrothermal CuxO can be attributed to its composition and surface properties. The ratio of lattice oxygen to surface oxygen (oxygen in surface adsorbates, surface states, and defects) increases after the first CO oxidation reaction for all samples except commercial CuO nanoparticles, which exhibit steady decrease with increased cycling. In addition, pure Cu2O irreversibly changes to CuO after CO oxidation reaction, but its catalytic performance after the first cycle is significantly improved compared to commercial CuO nanoparticles.
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UR - http://www.scopus.com/inward/citedby.url?scp=84922713151&partnerID=8YFLogxK
U2 - 10.1039/c4ta06804a
DO - 10.1039/c4ta06804a
M3 - Article
VL - 3
SP - 3627
EP - 3632
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
SN - 2050-7488
IS - 7
ER -