Activation of Co-O - O bond in {110} facet exposed Co3O4 3 O 4 by La doping for the boost of toluene catalytic oxidation

被引：1

作者：

Gao, Hongrun ^{[1
,2
]}

Song, Zhongxian ^{[3
]}

Fan, Yehua ^{[1
,2
]}

Zhang, Jinhui ^{[3
]}

Guo, Ruihua ^{[1
,2
]}

Zhang, Mengru ^{[1
,2
]}

Chen, Xi ^{[1
,2
]}

Liu, Wei ^{[1
,2
]}

Huang, Zhenzhen ^{[3
]}

Zhang, Xuejun ^{[1
,2
]}

机构：

[1] Shenyang Univ Chem Technol, Shenyang Key Lab Chem Pollut Control, Shenyang 110142, Peoples R China

[2] Shenyang Univ Chem Technol, Coll Environm & Safety Engn, Shenyang 110142, Peoples R China

[3] Henan Univ Urban Construct, Fac Environm & Municipal Engn, Key Lab Carbon Emiss Reduct & Combined Air Pollut, Henan Key Lab Water Pollut Control & Rehabil Techn, Pingdingshan, Peoples R China

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2025年 / 354卷

基金：

中国国家自然科学基金;

关键词：

Interfacial effect; Crystalline facets; Surface lattice oxygen; Co-O bond; Toluene oxidation; COBALT; PEROVSKITE; ELECTRONEGATIVITY; INTERFACE; LANTHANUM; KINETICS; SITES; IRON;

D O I：

10.1016/j.seppur.2024.129075

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A strategy to improve the toluene oxidation properties through La doping and citric acid modification is proposed. In particular, when the ratio of citric acid to metal is 2 (CCoLa-2), due to the differing nucleation rates of the La and Co precursors, the {1 10} crystalline facets in Co3O4 3 O 4 are exposed, which promotes the formation of more electron-deficient Co3+ 3+ ions along with an abundance of surface lattice oxygen, which facilitates the catalysis of toluene. Meanwhile, the interfacial effect produces by the doping of La induces the presence of La3+-O-Co3+/La3+-square-Co2+ 3+ -O-Co 3+ /La 3+ -square-Co 2+ structure in CCoLa-2, which reduces the electron concentration around the surface lattice oxygen and weakens the Co-O - O bond intensity, thus enhancing the activity of the surface lattice oxygen. Finally, CCoLa-2 possesses outstanding oxygen replenishment ability to rapidly degrade the tough intermediate species benzyl alcohol and benzoic acid, thus accelerating the catalytic cycle.

引用

页数：13

共 77 条

[1] The human health risk estimation of inhaled oil spill emissions with and without adding dispersant [J].