TY - JOUR
T1 - Cobalt oxide with flake-like morphology as efficient passive NOx adsorber
AU - Wu, Guohao
AU - Chen, Bingbing
AU - Bai, Zhifeng
AU - Zhao, Qi
AU - Wang, Zhihui
AU - Song, Chunshan
AU - Guo, Xinwen
AU - Shi, Chuan
N1 - Funding Information:
The work was supported by the National Natural Science Foundation of China (Nos. 21932002 , 21872014 , 21707015 , 21577013 ), the Fundamental Research Funds for the Central Universities DUT19LK04 , and the Natural Science Foundation of Liaoning Province ( 2019-ZD-0023 ).
Publisher Copyright:
© 2020
PY - 2021/1/15
Y1 - 2021/1/15
N2 - A series of Co-based oxides were synthesized and investigated as passive NOx adsorbers (PNAs). The morphology variation of Co3O4 oxide from nanoparticle to flake shape enhanced the NOx storage efficiency (NSE) and improved the NOx desorption capability. The enhanced NSE of the flake-like sample is related to its abundant surface oxygen species and large surface area. DRIFTS and CO2-TPD experimental results indicated that Co3O4-flake and Co7Ni3Ox-flake samples with moderate basicity could store NOx as nitrite species, which facilitated NOx desorption at lower temperatures.
AB - A series of Co-based oxides were synthesized and investigated as passive NOx adsorbers (PNAs). The morphology variation of Co3O4 oxide from nanoparticle to flake shape enhanced the NOx storage efficiency (NSE) and improved the NOx desorption capability. The enhanced NSE of the flake-like sample is related to its abundant surface oxygen species and large surface area. DRIFTS and CO2-TPD experimental results indicated that Co3O4-flake and Co7Ni3Ox-flake samples with moderate basicity could store NOx as nitrite species, which facilitated NOx desorption at lower temperatures.
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U2 - 10.1016/j.catcom.2020.106203
DO - 10.1016/j.catcom.2020.106203
M3 - Article
AN - SCOPUS:85094564077
VL - 149
JO - Catalysis Communications
JF - Catalysis Communications
SN - 1566-7367
M1 - 106203
ER -