Rapid Plasma Electrolytic Oxidation Synthesis of Intermetallic PtBi/MgO/Mg Monolithic Catalyst for Efficient Removal of Organic Pollutants

• Published in: Materials 2024-01, Vol.17 (3), p.605
• Main Authors: Rong, Jiayi, Li, Mengyang, Cao, Feng, Wang, Qianwei, Wang, Mingran, Cao, Yang, Zhou, Jun, Qin, Gaowu
• Format: Article
• Language: English
• Subjects: Acids; Aminophenol; Atomic properties; Catalysis; Catalysts; Catalytic activity; Degradation; Dyes; Electrolysis; Electron microscopes; Energy; Ethanol; Ethylenediaminetetraacetic acid; Hydrogenation; Intermetallic compounds; Magnesium; Magnesium oxide; Metals; Morphology; Nanoparticles; Nitrobenzoic acid; Nitrophenol; Nonequilibrium plasmas; Oxidation; Pollutants; Potassium; Synthesis
• ISSN: 1996-1944; 1996-1944
• DOI: 10.3390/ma17030605

The intermetallic PtBi/MgO/Mg monolithic catalyst was first prepared using non-equilibrium plasma electrolytic oxidation (PEO) technology. Spherical aberration-corrected transmission electron microscope (ACTEM) observation confirms the successful synthesis of the PtBi intermetallic structure. The efficiency of PtBi/Mg/MgO catalysts in catalyzing the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) in the presence of NaBH was demonstrated. The activity factor for the catalyst is 31.8 s g , which is much higher than reported values. In addition, the resultant catalyst also exhibits excellent catalytic activity in the organic pollutant reaction of p-nitrobenzoic acid (p-NBA) and methyl orange (MO). Moreover, benefiting from ordered atomic structures and the half-embedded PtBi nanoparticles (NPs), the catalyst demonstrates excellent stability and reproducibility in the degradation of 4-NP. This study provides an example of a simple method for the preparation of intermetallic structures as catalysts for organic pollutant degradation.