Abstract
Gold nanoparticles supported on transition metal oxide catalysts have been prepared by deposition-precipitation. Their catalytic activity with or without Au doped has been tested for soot oxidation. Au improves the catalytic activity of transition metal oxide for the oxidation of soot particles. Under the catalysis of Au/Co3O4, the initial oxidation temperature of soot is 354 ℃.
Highlights
Soot is an important part of particulate matter in the air, which reduces the air quality, and endangers the health of the human body[1]
Vehicle exhaust emission is a major source of soot particles, diesel engines account for a large proportion
The catalytic performance of the variable transition metal oxide catalyst for soot particles is shown in table 1
Summary
Soot is an important part of particulate matter in the air, which reduces the air quality, and endangers the health of the human body[1]. DPF is the most widely used and effective after-treatment technique so far[5,6] This technology still has several disadvantages such as the deposition of soot particles in the filter tunnel to increase the exhaust back pressure, reducing diesel engine’s performance[7]. The contact between Au nanoparticles and CeO2 nanocrystals affects the catalytic activity, and the attachment of Au on the surface of cubic crystals has higher CO oxidation activity than octahedron[9]. It has an excellent effect on the catalytic combustion of soot particles. The transition metal oxide doped noble metal Au nanoparticles were used to study their catalytic activity on soot particles, and the properties of oxidized soot particles were compared with and without Au nanoparticles
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