Cerium modified birnessite-type MnO2 for gaseous formaldehyde oxidation at low temperature

Zhu, Lin; Wang, Jinlong; Rong, Shaopeng; Wang, Haiyan; Zhang, Pengyi

doi:10.1016/j.apcatb.2017.04.025

Cited by 307 publications

(184 citation statements)

References 56 publications

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“…The 3D‐MnO 2 sample has higher surface hydroxyl and/or adsorbed water content than MnO 2 nanosheets and MnO 2 nanowires, partially resulting in the higher HCHO catalytic activity (45% of HCHO (100 ppm) over 3D‐MnO 2 at room temperature and GHSV=180 L/g cat h). Similar results were found in the Mn x Co 3‐x O 4 solid solution by Zhu et al., the number of surface active oxygen species in the Co−Mn oxide (molar ratio: 3/1) sample was higher than that in the Co−Mn oxides (molar ratio: 2/1) sample, therefore, the Co−Mn oxide (molar ratio: 3/1) sample revealed the higher catalytic activity than the Co−Mn oxides (molar ratio: 2/1) sample (100% vs 64% HCHO conversion, 190 ppm HCHO, GHSV=90 L/g cat h).…”

Section: The Influence Factors On the Activity Of Formaldehyde Oxidatsupporting

confidence: 84%

“…The catalyst with the highest content of manganese vacancy revealed the best catalytic performance although its specific surface area was the lowest. In the Mn x Co 3‐x O 4 solid solution, the number of surface active oxygen species was found more important than the specific surface area. The Co−Mn oxides (molar ratio: 3/1, 92 m 2 /g) could completely oxidize HCHO (190 ppm) at 75 °C while Co−Mn oxides (molar ratio: 2/1, 172 m 2 /g) only oxidize 64% of HCHO at the same temperature (GHSV=90 L/g cat h).…”

Section: The Influence Factors On the Activity Of Formaldehyde Oxidatmentioning

confidence: 97%

“…The specific surface area is not always to play the decisive role on the activity of the catalyst, other factors (including pore structure properties, manganese vacancy and surface active oxygen species and so on) should be considered at the same time. Tian et al .…”

Section: The Influence Factors On the Activity Of Formaldehyde Oxidatmentioning

confidence: 99%

“…In general, abundant surface adsorbed active oxygen species favor the higher catalytic activity. The surface active oxygen species are often detected by X‐ray photoelectron spectroscopy (XPS), time‐of‐flight secondary ion mass spectrometry (ToF‐SIMS) and infrared spectrometry (IR), HCHO‐TPD and so on …”

Section: The Influence Factors On the Activity Of Formaldehyde Oxidatmentioning

confidence: 99%

“…Zhu et al . prepared Ce–MnO 2 with different doping ratio (1‐10%) by a redox reaction using KMnO 4 , (NH 4 ) 2 C 2 O 4 and Ce(NO 3 ) 3 as the raw materials.…”

Section: The Influence Factors On the Activity Of Formaldehyde Oxidatmentioning

confidence: 99%

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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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Section: The Influence Factors On the Activity Of Formaldehyde Oxidatsupporting

confidence: 84%

Section: The Influence Factors On the Activity Of Formaldehyde Oxidatmentioning

confidence: 97%

Section: The Influence Factors On the Activity Of Formaldehyde Oxidatmentioning

confidence: 99%

Section: The Influence Factors On the Activity Of Formaldehyde Oxidatmentioning

confidence: 99%

“…Zhu et al . prepared Ce–MnO 2 with different doping ratio (1‐10%) by a redox reaction using KMnO 4 , (NH 4 ) 2 C 2 O 4 and Ce(NO 3 ) 3 as the raw materials.…”

Section: The Influence Factors On the Activity Of Formaldehyde Oxidatmentioning

confidence: 99%

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Progress of Catalytic Oxidation of Formaldehyde over Manganese Oxides

2019

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Thermocatalytic Degradation of Gaseous Formaldehyde Using Transition Metal‐Based Catalysts

2023

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Formaldehyde (HCHO: FA) is one of the most abundant but hazardous gaseous pollutants. Transition metal oxide (TMO)-based thermocatalysts have gained much attention in its removal due to their excellent thermal stability and cost-effectiveness. Herein, a comprehensive review is offered to highlight the current progress in TMO-based thermocatalysts (e.g., manganese, cerium, cobalt, and their composites) in association with the strategies established for catalytic removal of FA. Efforts are hence made to describe the interactive role of key factors (e.g., exposed crystal facets, alkali metal/nitrogen modification, type of precursors, and alkali/acid treatment) governing the catalytic activity of TMO-based thermocatalysts against FA. Their performance has been evaluated further between two distinctive operation conditions (i.e., low versus high temperature) based on computational metrics such as reaction rate. Accordingly, the superiority of TMO-based composite catalysts over mono-and bi-metallic TMO catalysts is evident to reflect the abundant surface oxygen vacancies and enhanced FA adsorptivity of the former group. Finally, the present challenges and future prospects for TMO-based catalysts are discussed with respect to the catalytic oxidation of FA. This review is expected to offer valuable information to design and build high performance catalysts for the efficient degradation of volatile organic compounds.

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Co doping induced phase transition and its distinct effects on the catalytic performance of MnO₂ toward toluene oxidation

Jiang,

Li,

Liu

et al. 2024

Applied Organom Chemis

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Manganese oxides are very important and conventional catalysts that have demonstrated appreciable catalytic activity for the oxidation of volatile organic compounds (VOCs). Nevertheless, pure manganese oxides suffer from poor activity especially at low temperatures, making it difficult to meet industrial applications. In this work, Co species were successfully doped into the lattice of MnO2 aiming at constructing defects to boost its catalytic performance for VOCs oxidation. In combination with the results of systematic characterizations, we found that Co doping forced the catalyst to transform from α‐MnO2 to spinel phase (Co,Mn)(Co,Mn)2O4. During this process, the metal–oxygen bonds are significantly weakened, which induces the massive generation of oxygen defects, endowing the Co modified catalysts with enhanced redox property and improved ability to adsorb and activate gaseous oxygen. As a result, Co doped catalysts show much better catalytic activity compared with pristine α‐MnO2, among which Mn10Co10 exhibits the best performance showing a decrease of 41°C and 51°C in T50 and T90 compared with the raw sample, respectively. Furthermore, Mn10Co10 demonstrates excellent stability, water resistance, and reusability, illustrating a great potential for industrial applications. Moreover, path of toluene decomposition over Co10Mn10 was revealed by in situ DRIFTS experiment, which complies with the sequence of toluene → benzyl alcohol → benzaldehyde → benzoate → maleic anhydride → CO2 and H2O.

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Cerium modified birnessite-type MnO2 for gaseous formaldehyde oxidation at low temperature

Cited by 307 publications

References 56 publications

Progress of Catalytic Oxidation of Formaldehyde over Manganese Oxides

Progress of Catalytic Oxidation of Formaldehyde over Manganese Oxides

Thermocatalytic Degradation of Gaseous Formaldehyde Using Transition Metal‐Based Catalysts

Co doping induced phase transition and its distinct effects on the catalytic performance of MnO₂ toward toluene oxidation

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Cerium modified birnessite-type MnO2 for gaseous formaldehyde oxidation at low temperature

Cited by 307 publications

References 56 publications

Progress of Catalytic Oxidation of Formaldehyde over Manganese Oxides

Progress of Catalytic Oxidation of Formaldehyde over Manganese Oxides

Thermocatalytic Degradation of Gaseous Formaldehyde Using Transition Metal‐Based Catalysts

Co doping induced phase transition and its distinct effects on the catalytic performance of MnO2 toward toluene oxidation

Contact Info

Product

Resources

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Co doping induced phase transition and its distinct effects on the catalytic performance of MnO₂ toward toluene oxidation