Insight into catalytic performance and reaction mechanism for toluene total oxidation over Cu-Ce supported catalyst.

Herein, three supported catalysts, CuO/AlO, CeO/AlO, and CuO-CeO/AlO, were synthesized by the convenient impregnation method to reveal the effect of CeO addition on catalytic performance and reaction mechanism for toluene oxidation. Compared with CuO/AlO, the T and T (the temperatures at 50% and 90% toluene conversion, respectively) of CuO-CeO/AlO were reduced by 33 and 39 °C, respectively. N adsorption-desorption experiment, XRD, SEM, EDS mapping, Raman, EPR, H-TPR, O-TPD, XPS, NH-TPD, Toluene-TPD, and in-situ DRIFTS were conducted to characterize these catalysts.

Investigation of catalytic methane oxidation over Ag/CoMO (M = Co, Ni, Cu) catalysts with varying interfacial electron transfer.

Atom-doped CoO catalysts loaded with Ag were examined as cost-effective catalysts for methane oxidation. The synthesized Ag/CoNiO catalysts exhibited distinctive surface characteristics in contrast with Ag/CoO and Ag/CoCuO catalysts prepared using a similar method. Characterization results unveiled that Ag/CoNiO featured a higher presence of active surface oxygen species, lattice defects, a larger surface area, and enhanced reducibility.

Enhancement Effect Induced by the Second Metal to Promote Ozone Catalytic Oxidation of VOCs.

It is a promising research direction to develop catalysts with high stability and ozone utilization for low-temperature ozone catalytic oxidation of VOCs. While bimetallic catalysts exhibit excellent catalytic activity compared with conventional single noble metal catalysts, limited success has been achieved in the influence of the bimetallic effect on the stability and ozone utilization of metal catalysts. Herein, it is necessary to systematically study the enhancement effect in the ozone catalytic reaction induced by the second metal.

[Characteristics of Industrial Volatile Organic Compounds(VOCs) Emission in China from 2011 to 2019].

In order to better understand the industrial volatile organic compounds(VOCs) emissions in China in recent years, an industrial VOCs emission inventory was developed from 2011 to 2019, based on the dynamic emission factors method and the comprehensive source classification system. The results showed that VOCs emissions increased first from 11122.7 kt in 2011 to 13397.