Mesoporous CoO-supported palladium nanocatalysts with high performance for o-xylene combustion. Issue 3 (12th January 2018)

• Record Type: Journal Article
• Authors: Xie, Shaohua; Liu, Yuxi; Deng, Jiguang; Yang, Jun; Zhao, Xingtian; Han, Zhuo; Zhang, Kunfeng; Wang, Yuan; Arandiyan, Hamidreza; Dai, Hongxing
• Is Part Of: Catalysis science & technology. Volume 8:Issue 3(2018)
• Page Start: 806
• Page End: 816
• Publication Date: 2018-01-12
• Subjects: Catalysis -- Periodicals; 541.395
• DOI: 10.1039/c7cy02007d
• Languages: English
• ISSNs: 2044-4753

Abstract

Abstract : The adsorbed o -xylene species can immediately react with active oxygen species at the highly active Pd–CoO interface between Pd NPs and meso-CoO, thus resulting in good catalytic performance of Pd/meso-CoO for o -xylene catalytic combustion. Abstract : The Pd-based catalysts have been widely studied for the combustion of volatile organic compounds, in which the roles of the Pd and the support are still not known clearly. In this study, mesoporous Co3 O4 and CoO ( i.e., meso-Co3 O4 and meso-CoO) were prepared and used as support for the loading of Pd nanoparticles (NPs). The supported Pd samples performed much better than the supports for o -xylene combustion, in which the Pd/meso-CoO sample showed the best catalytic activity ( T 90% = 173 °C), giving rise to reaction rates at 170 °C 3.5 and 84 times higher than those over the Pd/meso-Co3 O4 and meso-CoO samples, respectively. It has been established that the meso-CoO sample possessed strong ability to activate oxygen molecules to the active oxygen species, the loaded Pd NPs in a metallic Pd phase was beneficial for o -xylene adsorption, and the adsorbed o -xylene species could immediately react with the active oxygen species at the interface between Pd NPs and meso-CoO. Therefore, we conclude that the excellent catalytic performance of the Pd/meso-CoO sample was associated with its highly active Pd–CoO interface.