Low-temperature catalytic oxidation of formaldehyde over Co3O4 catalysts prepared using various precipitants

Fan, Zhijin; Zhang, Zhixiang; Fang, Wenjian; Yao, Xin; Zou, Guchu; Shangguan, Wenfeng

doi:10.1016/s1872-2067(15)61086-5

Cited by 66 publications

(32 citation statements)

References 46 publications

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“…The best combination was obtained using cobalt nitrate with a -cyclodextrin : cobalt ratio of 1 : 10. Fan et al 674 found that the KHCO3-precipitated Co3O4 was the most active catalyst which was linked to the presence of K + and CO3 2-, regenerated hydroxyl groups on the catalyst and favorable Co 3+ /Co 2+ ratio (Fig. 15ii).…”

Section: Formaldehydementioning

confidence: 99%

“…It has been reported that the catalytic performance of various cobalt oxides is influenced by their morphology, cobalt source and preparation conditions. 655,[672][673][674] Nano-Co3O4, 2D-Co3O4 and 3D-Co3O4 catalysts were prepared by Li and co-workers 672 and tested in the oxidation of formaldehyde. They revealed that the Co3O4 catalyst with a 3D mesostructure possessed the highest activity with 100% of formaldehyde oxidized at 130 °C (WHSV of 30,000 mL•g -1 •h −1 ), which was associated with its three-dimensional porous channel structure, larger specific surface area, abundant active surface oxygen species and active Co 3+ species on the exposed (220) crystal facet.…”

Section: Formaldehydementioning

confidence: 99%

See 1 more Smart Citation

Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources

et al. 2019

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Section: Formaldehydementioning

confidence: 99%

Section: Formaldehydementioning

confidence: 99%

Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources

et al. 2019

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“…In the thermal catalytic oxidation, the supported noble metal (e. g.: Pt, Pd, Au, etc.) and metal oxide (e. g.: CeO 2 , MnO 2 , Cr 2 O 3 , TiO 2 , Co 3 O 4 , etc …”

Section: Introductionmentioning

confidence: 99%

Progress of Catalytic Oxidation of Formaldehyde over Manganese Oxides

2019

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Thermal catalytic oxidation is a promising and effective technique for the removal of harmful formaldehyde (HCHO) in indoor air. Manganese oxide is a mostly‐investigated non‐noble metal oxide catalyst and attracts much attention due to its better catalytic performance for formaldehyde oxidation at low temperature. In this review, the effect of manganese oxide crystal structure, surface morphology and microstructure, surface active oxygen species, reducibility as well as catalytic reaction conditions (temperature, relative humidity and HCHO initial concentration) on catalytic performance, and the catalytic mechanism over manganese oxide were summarized and discussed. The challenges and prospects for future development of manganese oxide in catalytic oxidation of formaldehyde are also covered.

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“…This observation is in agreement with previous works that showed that the oxidation of HCHO is not dependent on the surface area of the catalysts. 5,7,22,48 Next, DRIFTS analysis were conducted to understand if the type of dopant present has an impact on the surface reaction of δ-MnO2, in terms of intermediate generation and desorption and/or accumulation. This will allow a better understanding of the promotional or inhibition effects of dopants.…”

Section: Resultsmentioning

confidence: 99%

Opposite Effects of Co and Cu Dopants on the Catalytic Activities of Birnessite MnO₂ Catalyst for Low-Temperature Formaldehyde Oxidation

et al. 2020

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Defect engineering is an effective strategy to enhance the activity of catalysts for various applications. Herein, it was demonstrated that in addition to enhancing surface properties via doping, the influence of dopants on the surface–intermediate interaction is a critical parameter that impacts the catalytic activity of doped catalysts for low-temperature formaldehyde (HCHO) oxidation. The incorporation of Co into the lattice structure of δ-MnO2 led to the generation of oxygen vacancies, which promoted the formation of surface active oxygen species, reduced activation energy, and enhanced catalytic activity for low-temperature oxidation of HCHO. On the contrary, Cu doping led to a drastic suppression of the catalytic activity of δ-MnO2, despite its enhanced redox properties and slight increase in the surface concentration of active oxygen species, compared to pristine δ-MnO2. Diffuse reflectance infrared Fourier transform analysis revealed that in the presence of Cu, carbonate intermediate species accumulate on the surface of the catalysts, leading to partial blockage of active sites and suppression of catalytic activity.

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Low-temperature catalytic oxidation of formaldehyde over Co3O4 catalysts prepared using various precipitants

Cited by 66 publications

References 46 publications

Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources

Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources

Progress of Catalytic Oxidation of Formaldehyde over Manganese Oxides

Opposite Effects of Co and Cu Dopants on the Catalytic Activities of Birnessite MnO₂ Catalyst for Low-Temperature Formaldehyde Oxidation

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Low-temperature catalytic oxidation of formaldehyde over Co3O4 catalysts prepared using various precipitants

Cited by 66 publications

References 46 publications

Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources

Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources

Progress of Catalytic Oxidation of Formaldehyde over Manganese Oxides

Opposite Effects of Co and Cu Dopants on the Catalytic Activities of Birnessite MnO2 Catalyst for Low-Temperature Formaldehyde Oxidation

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Product

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Opposite Effects of Co and Cu Dopants on the Catalytic Activities of Birnessite MnO₂ Catalyst for Low-Temperature Formaldehyde Oxidation