A facilitated synthesis of hierarchically porous Cu–Ce–Zr catalyst using bacterial cellulose for VOCs oxidation

Abstract

Highly active CuO-CeO 2-ZrO 2 catalysts were prepared by sol-gel method, using environmentally friendly bacterial cellulose (BC) as structure directing regent. The catalyst designed with commercial BC (Com-BC) exhibited catalytic performances in toluene (T 100 =220 o C) and ethyl acetate oxidation (T 100 =170 o C) superior to the catalysts prepared by traditional methods. Furthermore, excellent stability was obtained and no deactivation was observed during the 100 h on stream in toluene and ethyl acetate oxidation at T 100. The excellent activity and stability of Com-BC can be explained by the hierarchically porous structure, abundant oxygen vacancies, and good reducibility.

Enhanced Performance of the OMS-2-Supported CuOx Catalysts for Carbon Monoxide, Ethyl Acetate, and Toluene Oxidation

“…For CO oxidation, the r cat (2.04 × 10 −6 mol CO /(g cat s)) at 70 • C over 15Cu/OMS-2 was much higher than that (3.1 × 10 −7 mol CO /(g cat s)) at 100 • C over Pd/CuMnO x [28]. For ethyl acetate oxidation, the r cat (9.82 × 10 −7 mol ethyl acetate /(g cat s)) over OMS-2 at 180 • C and those (1.25 × 10 −6 -1.74 × 10 −6 mol ethyl acetate /(g cat s)) over xCu/OMS-2 at 180 • C were higher than that (2.30 × 10 −7 mol ethyl acetate /(g cat s)) over Cu-Ce-Zr prepared by Dou et al [29]. For toluene oxidation, the r cat (9.82 × 10 −7 mol toluene /(g cat s)) over OMS-2 at 260 • C and those (1.31 × 10 −6 -1.85 × 10 −6 mol toluene /(g cat s)) over xCu/OMS-2 at 260 • C were higher than that (4.09 × 10 −7 mol toluene / (g cat s)) over OM-CuMn0.25 prepared by Aguilera et al [26].…”

Cu‐Promoted Pt/Ce0.5Zr0.5Ox Catalyst for Ammonia Production Reaction of Passive SCR from Nitric Oxide and Hydrogen

“…[34] The lower Cu + ions content on the surface of Pt 0.01 Cu 0.4 Ce 0.3 Zr 0.3 O x samples was mainly due to the large amount of bulk CuO generation. [35] The O1s spectrum shown in Figure 8c can be fitted to two main peaks. The peaks at the binding energy of the 529.6-529.9 eV region correspond to the oxygen in the catalyst lattice (O L ), and the other binding energy centered in the 531.0-531.5 eV region is assigned to the surface chemically adsorbed oxygen (O A ).…”

Current progress on catalytic oxidation of toluene: a review

“…The supported transition metal-based catalysts have been shown to have higher catalytic activity compared to unsupported catalysts (Li et al 2016). To increase the catalytic activity of transition metal-based catalysts, two (Georgescu and Bombos 2016;Du et al 2018;Jiang and Xu 2019;Zhang et al 2019c) or three (Dou et al 2019) transition metals can be mixed to make one catalyst with high performance. Tables 3 and 4 summarize reported single and mixed transition metalbased catalysts, respectively.…”

“…For example, two different single oxides (CeO2, Co3O4) were combined to study their synergistic effect on catalytic oxidation of toluene, and it was found that CeO2-CoOx exhibited outstanding catalytic activity compared to pure CeO2 and Co3O4 (Zhang et al 2019d). Dou et al (2019) used environmentally friendly bacterial cellulose to synthesize CuO-CeO2-ZrO2…”