Enhancing performance of Co/CeO 2 catalyst by Sr doping for catalytic combustion of toluene

Integral structured Co–Mn composite oxides grown on interconnected Ni foam for catalytic toluene oxidation

“…2,33 For Co 3 O 4 sample with three reduction peaks, the one peak in the low temperature range of 200-300 C is associated with the reduction of surface Co 3+ into Co 2+ , the overlapping peaks in the low temperature range of 300-400 C is attributed to the further reduction of bulk Co 3+ into Co 2+ and metallic cobalt. 19,34 The TPR proles of Mn 3 O 4 sample exhibits two separated reduction peaks at 303 C and 354 C, which are assigned to the following two reduction processes: Mn 4+ / Mn 3+ and Mn 3+ / Mn 2+ , respectively. In addition, compared to single Co 3 O 4 and Mn 3 O 4 catalysts, the rst reduction peaks of Co-Mn mixed phase catalysts are gradually shied to low temperature regions, suggesting that their low temperature reducibility is improved via the synergistic effect of Co and Mn species.…”

“…Various transition metal oxides as active components in reaction processes have been extensively studied to replace noble metals over the past several years, because they have low cost, unique structural morphology, adequate catalytic activity and high thermal stability. 3,[17][18][19][20][21] Co 3 O 4 , a transition metal oxide, has been proven to excellent catalytic activity in numerous reactions duo to its superior physical-chemical properties. [22][23][24][25][26][27] Additionally, extensive efforts have revealed that the synergistic effect of Co species and other transition metal oxides has dramatically enhanced the redox properties and catalytic activities due to the formation of a solid solution, compared with single oxides.…”

Effect of Small Molecular Organic Acids on the Structure and Catalytic Performance of Sol–Gel Prepared Cobalt Cerium Oxides towards Toluene Combustion

“…Therefore, in recent years, transition metal oxide catalysts [12,13], such as Mn, Cu, Cr, Fe, and Co oxides, are becoming increasingly popular [14,15]. Among these catalysts, Co 3 O 4 is one of the most powerful oxides for VOCs oxidation [16]. Besides, CeO 2 , a typical rare earth oxide, has excellent redox property and oxygen transfer ability [17], thus, it is widely used as a catalyst promoter in VOCs oxidation reaction [18].…”

Efficient Waste to Energy Conversion Based on Co-CeO2 Catalyzed Water-Gas Shift Reaction

“…To sum up, catalyst performance was strongly related to the reduction properties of CoO, which can be described in terms of the SMSI and oxygen vacancy concentration. Oxygen vacancies are known to actively participate in the WGS reaction and promote the diffusion of lattice oxygen [17,59]. Hence, the SMSI effect-related generation of oxygen vacancies resulted in increased catalytic activity.…”