Fabrication of surface oxygen vacancy on α-MnO2 via calcination atmosphere for catalytic oxidation of toluene at low temperature DOI

Shiying Han,

Jiabin Zhou,

Zedong Chen

и другие.

Applied Surface Science, Год журнала: 2025, Номер unknown, С. 163665 - 163665

Опубликована: Май 1, 2025

Язык: Английский

Non-Stoichiometric BaxMn0.7Cu0.3O3 Perovskites as Catalysts for CO Oxidation: Optimizing the Ba Content DOI Creative Commons
Álvaro Díaz-Verde, Emerson Luiz dos Santos Veiga, Héctor Beltrán‐Mir

и другие.

Nanomaterials, Год журнала: 2025, Номер 15(2), С. 103 - 103

Опубликована: Янв. 10, 2025

In this work, a series of BaxMn0.7Cu0.3O3 samples (x: 1, 0.9, 0.8, and 0.7, BxMC) was synthesized, characterized, used as catalysts for CO oxidation reaction. All formulations were active in the tested conditions. A correlation between electrical conductivity, obtained by impedance spectroscopy, reducibility samples, H2-TPR, observed. The Ba0.8Mn0.7Cu0.3O3 composition (B0.8MC) showed best catalytic performance (comparable to that 1% Pt/Al2O3 reference sample) during tests conducted under conditions similar those found exhaust gases current gasoline engines. characterization data suggest simultaneous presence high Mn(IV)/Mn(III) surface ratio, oxygen vacancies, reduced copper species, these two latter being key properties ensuring conversion percentage both are sites oxidation. reaction temperature reactant atmosphere seem be most important factors achieving good performance, they strongly determine location stability species.

Язык: Английский

Процитировано

1
Enhancing the Performance of BaxMnO3 (x = 1, 0.9, 0.8 and 0.7) Perovskites as Catalysts for CO Oxidation by Decreasing the Ba Content DOI Creative Commons
Álvaro Díaz-Verde,

María José Illán Gómez

Nanomaterials, Год журнала: 2024, Номер 14(16), С. 1334 - 1334

Опубликована: Авг. 10, 2024

Mixed oxides featuring perovskite-type structures (ABO3) offer promising catalytic properties for applications focused on the control of atmospheric pollution. In this work, a series BaxMnO3 (x = 1, 0.9, 0.8 and 0.7) samples have been synthesized, characterized tested as catalysts CO oxidation reaction in conditions close to that found exhausts last-generation automotive internal combustion engines. All were observed be active during CO-TPRe tests, with Ba0.7MnO3 (B0.7M) being most one, it presents highest amount oxygen vacancies (which act sites oxidation) Mn (IV), which features levels reducibility best redox properties. B0.7M has also showcased high stability reactions at 300 °C, even though slightly lower conversion is achieved second consecutive cycle. This performance appears related decrease (IV)/Mn (III) ratio.

Язык: Английский

Процитировано

5
Revealing the intrinsic nature of Cu- and Ce-doped Mn3O4 catalysts with positive and negative effects on CO oxidation using operando DRIFTS-MS DOI
Zihao Hu, Xiaoying Zhou, Tiantian Zhang

и другие.

Dalton Transactions, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

Aiming at the poor performance of an Mn-MOF-74-derived Mn 3 O 4 catalyst in low-temperature CO oxidation, copper (Cu) and cerium (Ce) elements were used to modify improve its oxidation.

Язык: Английский

Процитировано

3
Effects of structural differences between γ-MnO2 and γ-Mn2O3 catalysts on CO oxidation: different active oxygen species and carbonate species using operando TPR-DRIFTS-MS DOI
Jiacheng Xu,

Peng Weng,

Shuiliang Yao

и другие.

New Journal of Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

MnO facilitates the formation of v as (CO 3 2− ) or s (OCO), and decomposition at low temperatures is a decisive step in CO oxidation.

Язык: Английский

Процитировано

0
Efficient photocatalytic degradation of 2,4,6-trichlorophenol by Z-scheme α-MnO2/Bi2S3 enriched with double vacancies under visible light: mechanism and degradation pathway DOI

Jinmei Xu,

Shao-Gang Xu,

Shengnan Tang

и другие.

Colloids and Surfaces A Physicochemical and Engineering Aspects, Год журнала: 2025, Номер unknown, С. 137059 - 137059

Опубликована: Апрель 1, 2025

Язык: Английский

Процитировано

0
Large-scale, continuous preparation of MnO2 for highly efficient oxidative coupling of amines to imines under mild conditions DOI
Jia‐qi Bai,

Huangfei Liu,

Mei Ma

и другие.

Journal of Catalysis, Год журнала: 2025, Номер unknown, С. 116209 - 116209

Опубликована: Май 1, 2025

Язык: Английский

Процитировано

0
La-modified manganese-based oxides with amorphous structure: Facile synthesis and mechanistic study for boosting catalytic soot combustion DOI
Di Yu,

Feiyang Zhang,

Siyu Gao

и другие.

Applied Catalysis B Environment and Energy, Год журнала: 2025, Номер unknown, С. 125516 - 125516

Опубликована: Май 1, 2025

Язык: Английский

Процитировано

0
Fabrication of surface oxygen vacancy on α-MnO2 via calcination atmosphere for catalytic oxidation of toluene at low temperature DOI

Shiying Han,

Jiabin Zhou,

Zedong Chen

и другие.

Applied Surface Science, Год журнала: 2025, Номер unknown, С. 163665 - 163665

Опубликована: Май 1, 2025

Язык: Английский

Процитировано

0