The effect of cerium incorporation on the catalytic performance of cobalt and manganese containing layer double oxides for acetone oxidation

Abstract

Background Acetone is a volatile organic compound (VOC) that is often associated with poor air quality. Acetone has chronic toxicity towards humans and has a significant impact on the overall atmospheric air quality. In this study, several layer double oxides (with M2+ = Mg, Ni, Co or Mn and M3+ = Al or Ce) were tested as catalysts for acetone oxidation. Results MnAl‐LDO was found to be the most efficient catalyst. 50% acetone conversion was achieved at 170 °C (T50%) and 90% conversion at 200 °C (T90%).The incorporation of Ce on MnCeAl‐LDO did not improve its catalytic properties over MnAl‐LDO (the T50% for MnCeAl‐LDO was 12 °C higher than for MnAl‐LDO). The good performance on MnAl‐LDO was due to the presence of Mn3+ and the low reduction temperature. MnAl‐LDO was not affected when water was introduced into the catalytic reaction setup. Less than 5% fluctuation in the acetone conversion rate at 170 and 200 °C was detected in the presence of 5.5% water. The incorporation of Ce on CoCeAl‐LDO improved its catalytic performance over CoAl‐LDO (T50% of CoCeAl‐LDO was 15 °C lower than CoAl‐LDO). Our results showed that the good catalytic performance of CoCeAl‐LDO was ascribed to the increased Co2+/Co3+ ratio and the abundance of lattice oxygen (Olatt). Conclusion MnAl‐LDO has good catalytic properties for acetone oxidation, even under humid conditions. The LDO catalysts tested here can be developed into efficient catalysts for acetone oxidation and serve as functional materials for the reduction in acetone or VOC emission. © 2018 Society of Chemical Industry

Boosting of overall water splitting activity by regulating the electron distribution over the active sites of Ce doped NiCo–LDH and atomic level understanding of the catalyst by DFT study

“…3D, indicating the presence of Ce in +3 oxidation state. 29,46 Electrocatalytic OER activity of NiCo-LDH/NF and 25.5% Cedoped NiCo-LDH/NF in 1 M KOH medium…”

Insight into the decay mechanism of cycling capacitance for layered double hydroxides at subnanometer scale

“…4b). 31,36,37 This study demonstrates the feasibility of the encapsulation strategy to improve the cycling stability of LDHs. It is worth mentioning that the slight solubility of PA in alkaline electrolyte still enables partial anion exchange by CO 3 2− (Fig.…”

Preparation and Performance of Carbon-Based Ce-Mn Catalysts for Efficient Degradation of Acetone at Low Temperatures

“…Additionally, after Ce doping, the absorption peaks of CeO 2 and Ce 2 O 3 (PDF 34-0394, PDF 44-1086) presented in the diffraction peaks of the catalyst samples [ 40 , 47 ], indicating the conversion of ceric nitrate into CeO 2 and Ce 2 O 3 . The signal of the MnO x absorption peaks was weakened, indicating that Ce doping can improve MnO x dispersibility in the carriers [ 47 , 48 , 49 ].…”