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
N1 - Publisher Copyright:
© The Royal Society of Chemistry 2015.
Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
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.
UR - http://www.scopus.com/inward/record.url?scp=84922713151&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84922713151&partnerID=8YFLogxK
U2 - 10.1039/c4ta06804a
DO - 10.1039/c4ta06804a
M3 - Article
AN - SCOPUS:84922713151
VL - 3
SP - 3627
EP - 3632
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
SN - 2050-7488
IS - 7
ER -