{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Kong C"],"funding":["Open Foundation of Engineering Research Center of Construction Technology of Precast Concrete of Zhejiang Province","National Natural Science Foundation of China","Jiangsu Provincial Department of Education"],"pagination":["8640-8650"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC8928516"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["7(10)"],"pubmed_abstract":["Plasma-assisted catalysis has been demonstrated to be an innovative technology for eliminating diesel particulate matter (DPM) efficiently at low temperature (≤200 °C). Moreover, past studies have demonstrated that CaSO<sub>4</sub>, which exists in small concentrations (<2%) in DPM and is toxic in thermal catalytic oxidation processes, actually enhances DPM oxidation during plasma-assisted catalytic processes. However, the role CaSO<sub>4</sub> plays in this promotion of DPM oxidation still remains unclear. The present study addresses this issue by investigating the underlying mechanisms of DPM oxidation during plasma-assisted catalytic processes using graphitic carbon as a surrogate DPM material in conjunction with CaSO<sub>4</sub>- and Au-impregnated γ-Al<sub>2</sub>O<sub>3</sub> catalysts. The results of mass spectrometry and in situ diffuse reflectance infrared Fourier transform spectroscopy, which employs an in situ cell with a small dielectric barrier discharge space over the catalyst bed, demonstrate that CaSO<sub>4</sub> can save and release O atoms contributing to graphite oxidation via the -S=O units of CaSO<sub>4</sub> through a reversible surface reaction (-S=O + O → -S(-O)<sub>2</sub>). The results are employed to propose a formal mechanism of graphite oxidation catalyzed by CaSO<sub>4</sub> and Au. These findings both improve our understanding of the plasma-assisted catalytic oxidation mechanisms of DPM and support the development of efficient plasma-assisted catalysts."],"journal":["ACS omega"],"pubmed_title":["Promotion Mechanism of CaSO<sub>4</sub> and Au in the Plasma-Assisted Catalytic Oxidation of Diesel Particulate Matter."],"pmcid":["PMC8928516"],"funding_grant_id":["ZZP1902","SJCX20_0934","12075037"],"pubmed_authors":["Li G","Wu Z","Li J","Zhu J","Yao S","Kong C"],"additional_accession":[]},"is_claimable":false,"name":"Promotion Mechanism of CaSO<sub>4</sub> and Au in the Plasma-Assisted Catalytic Oxidation of Diesel Particulate Matter.","description":"Plasma-assisted catalysis has been demonstrated to be an innovative technology for eliminating diesel particulate matter (DPM) efficiently at low temperature (≤200 °C). Moreover, past studies have demonstrated that CaSO<sub>4</sub>, which exists in small concentrations (<2%) in DPM and is toxic in thermal catalytic oxidation processes, actually enhances DPM oxidation during plasma-assisted catalytic processes. However, the role CaSO<sub>4</sub> plays in this promotion of DPM oxidation still remains unclear. The present study addresses this issue by investigating the underlying mechanisms of DPM oxidation during plasma-assisted catalytic processes using graphitic carbon as a surrogate DPM material in conjunction with CaSO<sub>4</sub>- and Au-impregnated γ-Al<sub>2</sub>O<sub>3</sub> catalysts. The results of mass spectrometry and in situ diffuse reflectance infrared Fourier transform spectroscopy, which employs an in situ cell with a small dielectric barrier discharge space over the catalyst bed, demonstrate that CaSO<sub>4</sub> can save and release O atoms contributing to graphite oxidation via the -S=O units of CaSO<sub>4</sub> through a reversible surface reaction (-S=O + O → -S(-O)<sub>2</sub>). The results are employed to propose a formal mechanism of graphite oxidation catalyzed by CaSO<sub>4</sub> and Au. These findings both improve our understanding of the plasma-assisted catalytic oxidation mechanisms of DPM and support the development of efficient plasma-assisted catalysts.","dates":{"release":"2022-01-01T00:00:00Z","publication":"2022 Mar","modification":"2025-04-18T20:23:31.96Z","creation":"2025-04-07T08:21:46.667Z"},"accession":"S-EPMC8928516","cross_references":{"pubmed":["35309445"],"doi":["10.1021/acsomega.1c06659"]}}