Photothermal catalytic CO2 oxidative dehydrogenation of propane to propylene over BiOX (X = Cl, Br, I) nanocatalysts. Issue 21 (7th September 2022)

• Record Type: Journal Article
• Authors: He, Zhen-Hong; Wu, Bao-Ting; Wang, Zhong-Yu; Yang, Shao-Yan; Wang, Kuan; Shi, Jiao-Jiao; He, Meng-Xin; Wang, Weitao; Liu, Zhao-Tie
• Is Part Of: Green chemistry. Volume 24:Issue 21(2022)
• Page Start: 8270
• Page End: 8279
• Publication Date: 2022-09-07
• Subjects: Environmental chemistry -- Industrial applications -- Periodicals; Environmental management -- Periodicals; 660
• DOI: 10.1039/d2gc02571j
• Languages: English
• ISSNs: 1463-9262

Abstract

Abstract : BiOI nanosheets could catalyze the photothermal catalytic CO2 oxidative dehydrogenation of propane to propylene. Abstract : CO2 oxidative dehydrogenation of propane (CO2 -ODHP) is a strategy of "two birds with one stone" to synthesize propylene and utilize CO2 . However, the reaction is always conducted at high temperatures (>550 °C). In the present work, we have for the first time conducted the reaction at 270 °C under photothermal conditions over several BiOX (X = Cl, Br, I) nanocatalysts. Among them, the BiOI nanosheet catalyst exhibited the highest C3 H6 formation activity of 282.6 μmol gcat −1 h −1 with 89% selectivity. The lattice oxygen species on the catalyst could catalyze propane dehydrogenation to propylene, and simultaneously, oxygen vacancies were formed. The oxygen vacancies are responsible for CO2 reduction to CO. In addition, the catalyst is facet-dependent, and the (001) facets are more active than the (110) facets. The present work successfully verifies the feasibility of photothermal catalytic CO2 -ODHP over BiOI nanosheets and also provides a new insight to construct other facet-dependent dual-functional redox catalysts.