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Lu S, Ma Y, Zhao L. Production of ZnO-CoOx-CeO2 nanocomposites and their dye removal performance from wastewater by adsorption-photocatalysis. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Solid-State Construction of CuO x/Cu 1.5Mn 1.5O 4 Nanocomposite with Abundant Surface CuO x Species and Oxygen Vacancies to Promote CO Oxidation Activity. Int J Mol Sci 2022; 23:ijms23126856. [PMID: 35743296 PMCID: PMC9224245 DOI: 10.3390/ijms23126856] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Revised: 06/17/2022] [Accepted: 06/18/2022] [Indexed: 02/04/2023] Open
Abstract
Carbon monoxide (CO) oxidation performance heavily depends on the surface-active species and the oxygen vacancies of nanocomposites. Herein, the CuOx/Cu1.5Mn1.5O4 were fabricated via solid-state strategy. It is manifested that the construction of CuOx/Cu1.5Mn1.5O4 nanocomposite can produce abundant surface CuOx species and a number of oxygen vacancies, resulting in substantially enhanced CO oxidation activity. The CO is completely converted to carbon dioxide (CO2) at 75 °C when CuOx/Cu1.5Mn1.5O4 nanocomposites were involved, which is higher than individual CuOx, MnOx, and Cu1.5Mn1.5O4. Density function theory (DFT) calculations suggest that CO and O2 are adsorbed on CuOx/Cu1.5Mn1.5O4 surface with relatively optimal adsorption energy, which is more beneficial for CO oxidation activity. This work presents an effective way to prepare heterogeneous metal oxides with promising application in catalysis.
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Zhang H, Chai H, Liu A, Jia W, Cao Y. Room‐Temperature Solvent‐Free Synthesis of Three‐Dimensional Flower‐Like α‐MnO
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Microspheres for Supercapacitor Application. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hongyu Zhang
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources Key Laboratory of Advanced Functional Materials Autonomous Region Institute of Applied Chemistry College of Chemistry Xinjiang University, Urumqi 830046 Xinjiang P.R. China
| | - Hui Chai
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources Key Laboratory of Advanced Functional Materials Autonomous Region Institute of Applied Chemistry College of Chemistry Xinjiang University, Urumqi 830046 Xinjiang P.R. China
| | - Anjie Liu
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources Key Laboratory of Advanced Functional Materials Autonomous Region Institute of Applied Chemistry College of Chemistry Xinjiang University, Urumqi 830046 Xinjiang P.R. China
| | - Wei Jia
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources Key Laboratory of Advanced Functional Materials Autonomous Region Institute of Applied Chemistry College of Chemistry Xinjiang University, Urumqi 830046 Xinjiang P.R. China
| | - Yali Cao
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources Key Laboratory of Advanced Functional Materials Autonomous Region Institute of Applied Chemistry College of Chemistry Xinjiang University, Urumqi 830046 Xinjiang P.R. China
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Kong F, Zhang H, Chai H, Liu B, Cao Y. Insight into the Crystal Structures and Surface Property of Manganese Oxide on CO Catalytic Oxidation Performance. Inorg Chem 2021; 60:5812-5820. [PMID: 33783206 DOI: 10.1021/acs.inorgchem.1c00144] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
α-MnO2 nanorods and flower-like γ-MnO2 microspheres were synthesized by facile and mild methods to illustrate the effect of crystal structures and surface features on catalytic performance with the help of carbon monoxide (CO) oxidation. It is revealed that the flower-like γ-MnO2 microspheres possess better catalytic oxidation performance (CO complete conversion temperature at 120 °C and long-time stability for 50 h) than α-MnO2 nanorods, which can be attributed to the obvious differences in the chemical bonds and linking modes of [MnO6] octahedra due to the different crystal structures. γ-MnO2 possesses lower Mn-O bond strength that enables γ-MnO2 to present a large amount of surface lattice oxygen and superior oxygen mobility. The disordered random intergrowth tunnel structure can adsorb effectively CO molecules, resulting in excellent catalytic performance for CO catalytic oxidation. In addition, the MnO2 catalyst probably occurred via a Mars-van Krevelen mechanism for CO oxidation. This work provides an insight into the effect of crystal structures and surface property of manganese oxide on catalytic oxidation performance, which presents help for the future design of promising catalysts with excellent catalytic performance.
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Affiliation(s)
- Fanlin Kong
- Key Laboratory of Energy Materials Chemistry, Ministry of Education, Key Laboratory of Advanced Functional Materials, Autonomous Region, College of Chemistry, Xinjiang University, Urumqi 830046, Xinjiang, China
| | - Hongyu Zhang
- Key Laboratory of Energy Materials Chemistry, Ministry of Education, Key Laboratory of Advanced Functional Materials, Autonomous Region, College of Chemistry, Xinjiang University, Urumqi 830046, Xinjiang, China
| | - Hui Chai
- Key Laboratory of Energy Materials Chemistry, Ministry of Education, Key Laboratory of Advanced Functional Materials, Autonomous Region, College of Chemistry, Xinjiang University, Urumqi 830046, Xinjiang, China
| | - Baolin Liu
- Key Laboratory of Energy Materials Chemistry, Ministry of Education, Key Laboratory of Advanced Functional Materials, Autonomous Region, College of Chemistry, Xinjiang University, Urumqi 830046, Xinjiang, China
| | - Yali Cao
- Key Laboratory of Energy Materials Chemistry, Ministry of Education, Key Laboratory of Advanced Functional Materials, Autonomous Region, College of Chemistry, Xinjiang University, Urumqi 830046, Xinjiang, China
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Liu B, Li Y, Wang K, Cao Y. The solid-state in situ construction of Cu 2O/CuO heterostructures with adjustable phase compositions to promote CO oxidation activity. CrystEngComm 2020. [DOI: 10.1039/d0ce01324b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Cu2O/CuO heterojunctions were fabricated via in situ solid-state technology. Tuning the ratio of reactants enables optimization of the components of the Cu2O/CuO heterostructures and their catalytic activities for CO oxidation.
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Affiliation(s)
- Baolin Liu
- Key Laboratory of Energy Materials Chemistry
- Ministry of Education
- Key Laboratory of Advanced Functional Materials
- Autonomous Region
- Institute of Applied Chemistry
| | - Yizhao Li
- Key Laboratory of Energy Materials Chemistry
- Ministry of Education
- Key Laboratory of Advanced Functional Materials
- Autonomous Region
- Institute of Applied Chemistry
| | - Kun Wang
- Key Laboratory of Energy Materials Chemistry
- Ministry of Education
- Key Laboratory of Advanced Functional Materials
- Autonomous Region
- Institute of Applied Chemistry
| | - Yali Cao
- Key Laboratory of Energy Materials Chemistry
- Ministry of Education
- Key Laboratory of Advanced Functional Materials
- Autonomous Region
- Institute of Applied Chemistry
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