Polyhedral cobalt oxide supported Pt nanoparticles with enhanced performance for toluene catalytic oxidation. (January 2021)

• Record Type: Journal Article
• Authors: Li, Shuangju; Lin, Yin; Wang, Da; Zhang, Chuanhui; Wang, Zhong; Li, Xuebing
• Is Part Of: Chemosphere. Volume 263(2021)
• Publication Date: 2021-01
• Subjects: Cobalt oxide -- Pt nanoparticles -- Toluene -- Catalytic oxidation -- Oxygen cycle; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2020.127870
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: Polyhedral CoO x was synthesized by calcination of Co-based metal-organic framework ZIF-67 and highly dispersed Pt nanoparticles were successfully loaded on CoO x . The catalytic results showed that Ptnano /CoO x had the best activity and stability. As compared with conventional Co3 O4, polyhedral CoO x showed more excellent catalytic oxidation performance of toluene, which was related to enhanced oxygen mobility, defective structure and rich active oxygen species provided by Polyhedral CoO x . Moreover, Pt-CoO x metal-support interaction enhanced the dispersion of Pt species and showed more Pt 0 ratio. It was reasonable that the gaseous O2 can be activated directly or moved into the catalyst's surface to form oxygen cycle. Graphical abstract: Image 1 Highlights: Pt supported polyhedral CoO x had the best toluene oxidation activity. The super activity was due to the cooperative action between metal-support. Gaseous O2 was activated or moved into the catalyst's surface to form oxygen cycle.