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Yang Y, Miao C, Wang R, Zhang R, Li X, Wang J, Wang X, Yao J. Advances in morphology-controlled alumina and its supported Pd catalysts: synthesis and applications. Chem Soc Rev 2024; 53:5014-5053. [PMID: 38600823 DOI: 10.1039/d3cs00776f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
Alumina materials, as one of the cornerstones of the modern chemical industry, possess physical and chemical properties that include excellent mechanical strength and structure stability, which also make them highly suitable as catalyst supports. Alumina-supported Pd-based catalysts with the advantages of exceptional catalytic performance, flexible regulated surface metal/acid sites, and good regeneration ability have been widely used in many traditional chemical industry fields and have also shown great application prospects in emerging fields. This review aims to provide an overview of the recent advances in alumina and its supported Pd-based catalysts. Specifically, the synthesis strategies, morphology transformation mechanisms, and structural properties of alumina with various morphologies are comprehensively summarized and discussed in-depth. Then, the preparation approaches of Pd/Al2O3 catalysts (impregnation, precipitation, and other emerging methods), as well as the metal-support interactions (MSIs), are revisited. Moreover, Some promising applications have been chosen as representative reactions in fine chemicals, environmental purification, and sustainable development fields to highlight the universal functionality of the alumina-supported Pd-based catalysts. The role of the Pd species, alumina support, promoters, and metal-support interactions in the enhancement of catalytic performance are also discussed. Finally, some challenges and upcoming opportunities in the academic and industrial application of the alumina and its supported Pd-based are presented and put forward.
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Affiliation(s)
- Yanpeng Yang
- SINOPEC Research Institute of Petroleum Processing Co., Ltd., Beijing, 100083, P. R. China.
| | - Chenglin Miao
- SINOPEC Research Institute of Petroleum Processing Co., Ltd., Beijing, 100083, P. R. China.
| | - Ruoyu Wang
- SINOPEC Research Institute of Petroleum Processing Co., Ltd., Beijing, 100083, P. R. China.
| | - Rongxin Zhang
- SINOPEC Research Institute of Petroleum Processing Co., Ltd., Beijing, 100083, P. R. China.
| | - Xiaoyu Li
- SINOPEC Research Institute of Petroleum Processing Co., Ltd., Beijing, 100083, P. R. China.
| | - Jieguang Wang
- SINOPEC Research Institute of Petroleum Processing Co., Ltd., Beijing, 100083, P. R. China.
| | - Xi Wang
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, School of Physical Science and Engineering, Beijing Jiaotong University, Beijing 100044, P. R. China.
- Chemistry and Chemical Engineering Guangdong Laboratory, Shantou, 51031, P. R. China
| | - Jiannian Yao
- Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Science, Beijing 100190, P. R. China.
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Magnard NPL, Kirsch A, Jørgensen MRV, Kantor I, Sørensen DR, Huotari S, Rudić S, Bordallo HN, Jensen KMØ. Control of H-Related Defects in γ-MnO 2 in a Hydrothermal Synthesis. Inorg Chem 2023; 62:13021-13029. [PMID: 37537143 DOI: 10.1021/acs.inorgchem.3c01815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
Manganese dioxide is a good candidate for effective energy storage and conversion as it possesses rich electrochemistry. The compound also shows a wide polymorphism. The γ-variety, an intergrowth of β- and R-MnO2, has been extensively studied in several types of batteries (e.g., Zn/MnO2, Li-ion) and is a common electrode material for commercial batteries. It is well known that the insertion of protons thermodynamically stabilizes γ-MnO2 with respect to β-MnO2. Protons can enter the structure either by forming groups of 4 hydroxyls around a Mn4+ vacancy, called a Ruetschi defect, or by forming a hydroxyl group near a Mn3+ ion, called a Coleman defect. These defects differently affect the electrochemistry of manganese oxide, and tailoring their amount in the structure can be used to tune the material properties. Previous studies have addressed the proton insertion process, but the role of the synthesis pathway on the amount of defects created is not well understood. We here investigate how the parameters in a hydrothermal synthesis of γ-MnO2 nanoparticles influence the amount and type of H-related defects. Structural investigations are carried out using Pair Distribution Function analysis, X-ray absorption spectroscopy, thermogravimetric analysis, and inelastic neutron scattering. We demonstrate the possibility to control the amount and type of defects introduced during the synthesis. While the amount of Ruetschi defects increases with synthesis temperature, it decreases with extended synthesis time, along with the amount of Coleman defects. Moreover, we discuss the arrangement of the defects in the γ-MnO2 nanoparticles.
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Affiliation(s)
| | - Andrea Kirsch
- Department of Chemistry, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Mads R V Jørgensen
- MAX IV Laboratory, 224 84 Lund, Sweden
- Department of Chemistry & iNANO, Aarhus University, 8000 Aarhus C, Denmark
| | - Innokenty Kantor
- MAX IV Laboratory, 224 84 Lund, Sweden
- Department of Physics, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Daniel R Sørensen
- MAX IV Laboratory, 224 84 Lund, Sweden
- Department of Chemistry & iNANO, Aarhus University, 8000 Aarhus C, Denmark
| | - Simo Huotari
- Department of Physics, University of Helsinki, 00014 Helsinki, Finland
| | - Svemir Rudić
- ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, STFC, Didcot OX11 0QX, U.K
| | - Heloisa N Bordallo
- Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Kirsten M Ø Jensen
- Department of Chemistry, University of Copenhagen, 2100 Copenhagen, Denmark
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Template-free hydrothermal synthesis of hollow alumina microspheres and its excellent catalytic properties for thiolation. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.11.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Spindle-shaped nanoclusters self-assembled into bayberry-like hollow alumina microspheres for efficient catalytic hydrogenation of CS2 to CH3SH. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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