Simultaneously catalytic decomposition of formaldehyde and ozone over manganese cerium oxides at room temperature: Promotional effect of relative humidity on the MnCeO x solid solution

Yi Zhang, Minxia Chen, Zhixiang Zhang, Zhi Jiang, Wenfeng Shangguan, Hisahiro Einaga

研究成果: ジャーナルへの寄稿記事

8 引用 (Scopus)

抄録

Manganese cerium oxides were synthesized by Pechini method and were used for investigating the performance of solid solution and the influence of water vapor presence on catalytic decomposition of formaldehyde and ozone at room temperature. Compared with the pristine manganese oxides and cerium dioxide, MnCeOx catalyst exhibited the best performance on HCHO oxidation and excellent ozone decomposition under dry air conditions although the CO 2 yield is much lower than that of the solo cerium oxide. The as-prepared catalysts were characterized by XRD, XPS, N 2 adsorption-desorption, H 2 -TPR and O 2 -TPD techniques. These characterization results revealed that the MnCeO x catalyst formed a solid solution of manganese and cerium, and exhibited relatively abundance oxygen vacancies and the most surface lattice oxygen species, enhancing remarkable adsorption and redox properties. MnCeO x catalyst has ∼100% HCHO conversion into CO 2 in the catalytic activity test while the relative humidity is higher than 50% in this work, which could be suitable for indoor air purification. In situ DRIFTS results demonstrated that this excellent performance of HCHO complete oxidation is attributed to the continuously replenished surface hydroxyl groups generated from the interaction of water vapor and ozone on the surface of MnCeO x catalyst. This composite oxide is a promising catalyst for removing formaldehyde and ozone in the indoor environment.

元の言語英語
ページ(範囲)323-333
ページ数11
ジャーナルCatalysis Today
327
DOI
出版物ステータス出版済み - 5 1 2019

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Ozone
Cerium
Manganese
Formaldehyde
Thermal effects
Solid solutions
Atmospheric humidity
Decomposition
Catalysts
Oxides
Steam
Carbon Monoxide
Water vapor
Air purification
Adsorption
Oxidation
Manganese oxide
Oxygen vacancies
Temperature programmed desorption
Hydroxyl Radical

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

これを引用

Simultaneously catalytic decomposition of formaldehyde and ozone over manganese cerium oxides at room temperature : Promotional effect of relative humidity on the MnCeO x solid solution. / Zhang, Yi; Chen, Minxia; Zhang, Zhixiang; Jiang, Zhi; Shangguan, Wenfeng; Einaga, Hisahiro.

:: Catalysis Today, 巻 327, 01.05.2019, p. 323-333.

研究成果: ジャーナルへの寄稿記事

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abstract = "Manganese cerium oxides were synthesized by Pechini method and were used for investigating the performance of solid solution and the influence of water vapor presence on catalytic decomposition of formaldehyde and ozone at room temperature. Compared with the pristine manganese oxides and cerium dioxide, MnCeOx catalyst exhibited the best performance on HCHO oxidation and excellent ozone decomposition under dry air conditions although the CO 2 yield is much lower than that of the solo cerium oxide. The as-prepared catalysts were characterized by XRD, XPS, N 2 adsorption-desorption, H 2 -TPR and O 2 -TPD techniques. These characterization results revealed that the MnCeO x catalyst formed a solid solution of manganese and cerium, and exhibited relatively abundance oxygen vacancies and the most surface lattice oxygen species, enhancing remarkable adsorption and redox properties. MnCeO x catalyst has ∼100{\%} HCHO conversion into CO 2 in the catalytic activity test while the relative humidity is higher than 50{\%} in this work, which could be suitable for indoor air purification. In situ DRIFTS results demonstrated that this excellent performance of HCHO complete oxidation is attributed to the continuously replenished surface hydroxyl groups generated from the interaction of water vapor and ozone on the surface of MnCeO x catalyst. This composite oxide is a promising catalyst for removing formaldehyde and ozone in the indoor environment.",
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AU - Jiang, Zhi

AU - Shangguan, Wenfeng

AU - Einaga, Hisahiro

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AB - Manganese cerium oxides were synthesized by Pechini method and were used for investigating the performance of solid solution and the influence of water vapor presence on catalytic decomposition of formaldehyde and ozone at room temperature. Compared with the pristine manganese oxides and cerium dioxide, MnCeOx catalyst exhibited the best performance on HCHO oxidation and excellent ozone decomposition under dry air conditions although the CO 2 yield is much lower than that of the solo cerium oxide. The as-prepared catalysts were characterized by XRD, XPS, N 2 adsorption-desorption, H 2 -TPR and O 2 -TPD techniques. These characterization results revealed that the MnCeO x catalyst formed a solid solution of manganese and cerium, and exhibited relatively abundance oxygen vacancies and the most surface lattice oxygen species, enhancing remarkable adsorption and redox properties. MnCeO x catalyst has ∼100% HCHO conversion into CO 2 in the catalytic activity test while the relative humidity is higher than 50% in this work, which could be suitable for indoor air purification. In situ DRIFTS results demonstrated that this excellent performance of HCHO complete oxidation is attributed to the continuously replenished surface hydroxyl groups generated from the interaction of water vapor and ozone on the surface of MnCeO x catalyst. This composite oxide is a promising catalyst for removing formaldehyde and ozone in the indoor environment.

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