Catalytic performance and reaction mechanism of NO oxidation over Co3O4 catalysts

Ma，Lei1; Zhang，Wei2; Wang，Yang Gang2; Chen，Xiaoyin1; Yu，Weiting3; Sun，Kai4; Sun，Haiping4; Li，Junhua5; Schwank，Johannes W.1

2020-06-15

10.1016/j.apcatb.2019.118371

APPLIED CATALYSIS B-ENVIRONMENTAL   影响因子和分区

0926-3373

1873-3883

CoO nanorods and nanoparticles were prepared and differed in the overall particle sizes and shapes, while in both cases the catalytically active (110) lattice plane was mainly exposed. The forward rate of NO oxidation of CoO nanorods, stated on catalyst weight, was higher than that of CoO nanoparticles. However, the turnover frequency (TOF) numbers normalized by the surface Co were almost the same, indicating that NO oxidation took place over the same active sites of surface Co for both catalysts. CoO nanorods had a larger number of exposed active sites than nanoparticles. The dissociation of surface O*, formed by the quasi-equilibrated reaction of O molecules on vacant sites (*), assisted by gaseous NO to form NO and surface O*, was the rate-determining step in NO oxidation. In situ FTIR spectra confirmed that abundant bridged nitrates were formed on both CoO nanorods and nanoparticles.

Catalytic oxidation Co3O4 morphology In situ DRIFTS Reaction kinetics Reaction mechanism Shape dependence

EI ; SCI

英语

其他

National Natural Science Foundation of China[21936005]

Chemistry ; Engineering

Chemistry, Physical ; Engineering, Environmental ; Engineering, Chemical

WOS:000518865300049

ELSEVIER

20200808203237

Catalyst activity ; Fourier transform infrared spectroscopy ; Morphology ; Nanocatalysts ; Nanoparticles ; Nanorods ; Oxidation ; Reaction kinetics

Nanotechnology:761 ; Chemistry:801 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Solid State Physics:933 ; Materials Science:951

CHEMISTRY

2-s2.0-85079720953

Scopus

1.Department of Chemical Engineering,University of Michigan,Ann Arbor,48109,United States
2.Department of Chemistry and Shenzhen Grubbs Institute,Southern University of Science and Technology,Shenzhen,518055,China
3.College of Environment,Zhejiang University of Technology,Hangzhou,310014,China
4.Department of Materials Science and Engineering,University of Michigan,Ann Arbor,48109,United States
5.School of Environment,Tsinghua University,Beijing,100084,China

Ma，Lei,Zhang，Wei,Wang，Yang Gang,et al. Catalytic performance and reaction mechanism of NO oxidation over Co3O4 catalysts[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2020,267.

Ma，Lei.,Zhang，Wei.,Wang，Yang Gang.,Chen，Xiaoyin.,Yu，Weiting.,...&Schwank，Johannes W..(2020).Catalytic performance and reaction mechanism of NO oxidation over Co3O4 catalysts.APPLIED CATALYSIS B-ENVIRONMENTAL,267.

Ma，Lei,et al."Catalytic performance and reaction mechanism of NO oxidation over Co3O4 catalysts".APPLIED CATALYSIS B-ENVIRONMENTAL 267(2020).