Achieving Efficient Toluene Mineralization over Ordered Porous LaMnO3 Catalyst: The Synergistic Effect of High Valence Manganese and Surface Lattice Oxygen | Sciact - CRIS-system of Boreskov Institute of Catalysis

Achieving Efficient Toluene Mineralization over Ordered Porous LaMnO3 Catalyst: The Synergistic Effect of High Valence Manganese and Surface Lattice Oxygen Full article

Journal

Applied Surface Science
ISSN: 0169-4332

Output data

Year: 2023, Volume: 615, Article number : 156248, Pages count : 10 DOI: 10.1016/j.apsusc.2022.156248

Tags

Surface lattice oxygen; High valence manganese; Synergistic effect; Porous LaMnO3 catalyst; Toluene mineralization

Authors

Cheng Qiang ¹ , Kang Kaili ¹ , Li Yuan ¹ , Wang Jiquan ³ , Wang Zhuangzhuang ¹ , Selishchev Dmitry ⁴ , Wang Xiaotian ¹ , Zhang Gaoke ^1,2

Affiliations

1	Shenzhen Research Institute, Hubei Key Laboratory of Mineral Resources Processing and Environment, State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, People’s Republic of China
2	Henan Institute of Advanced Technology, Zhengzhou University, 97 Wenhua Road, Zhengzhou 450052, People’s Republic of China
3	Hubei Engineering Consultation Co., Ltd., Wuhan 430071, People’s Republic of China
4	Department of Unconventional Catalytic Processes, Boreskov Institute of Catalysis, Novosibirsk 630090, Russia

Funding (2)

1	National Natural Science Foundation of China	92163125
2	Shenzhen Government Online	JCYJ20200109150225155

To elucidate the role of high valence manganese and surface lattice oxygen in catalyst for catalytic combustion of toluene, herein, a porous LaMnO3 catalyst was firstly fabricated using ordered mesoporous carbon (OMC) as a hard-template. Compared with pristine LaMnO3-bulk, the optimal porous LaMnO3 exhibited boosted catalytic performance for toluene combustion, leading to a ∼50 ℃ lower T90% (required temperatures for 90% toluene conversions). The results of N2 adsorption–desorption measurement, X-ray photoelectron spectroscope, O2 temperature-programmed desorption and H2 temperature-programmed reduction indicated that the optimal porous LaMnO3 displayed high molar ratios of surface Mn4+/Mn3+ and Olatt/Oads, which exposed abundant active sites and promoted the preferential low-temperature catalytic oxidation of toluene. Simultaneously, the increased content of high valence manganese (Mn4+) and surface lattice oxygen (Olatt) in porous LaMnO3 catalyst accelerated the cycle of toluene deep oxidation. Combined with the analysis of toluene intermediates by in situ diffuse reflectance infrared Fourier transform spectroscopy, the toluene degradation mechanism over porous LaMnO3 was also explored. This work provides a feasible strategy for design of porous Mn-based perovskite catalyst with a high efficiency and stability for catalytic combustion of VOCs.

Cheng Q. , Kang K. , Li Y. , Wang J. , Wang Z. , Selishchev D. , Wang X. , Zhang G.
Achieving Efficient Toluene Mineralization over Ordered Porous LaMnO3 Catalyst: The Synergistic Effect of High Valence Manganese and Surface Lattice Oxygen
Applied Surface Science. 2023. V.615. 156248 :1-10. DOI: 10.1016/j.apsusc.2022.156248 WOS Scopus РИНЦ AN OpenAlex

Submitted:	Oct 12, 2022
Accepted:	Dec 25, 2022
Published online:	Dec 29, 2022
Published print:	Apr 1, 2023

Web of science:	WOS:000923366100001
Scopus:	2-s2.0-85146050307
Elibrary:	54088991
Chemical Abstracts:	2023:92323
OpenAlex:	W4313420757

DB	Citing
Scopus	23
Web of science	25
Elibrary	16
OpenAlex	19