1
|
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.
Collapse
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.
| |
Collapse
|
2
|
Han X, Zhang L, Zhang R, Wang K, Wang X, Li B, Tao Z, Song S, Zhang H. Boosting the catalytic performance of Al 2O 3-supported Pd catalysts by introducing CeO 2 promoters. Dalton Trans 2024. [PMID: 38258661 DOI: 10.1039/d3dt03676f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
Maintaining the stability of noble metals is the key to the long-term stability of supported catalysts. In response to the instability of noble metal species at high temperatures, we developed a synergistic strategy of dual oxide supports. By designing and constructing ceria components with small sizes, we have achieved unity in the ability of catalytic materials to supply oxygen and stabilize metal species. In this study, we prepared Al2O3-CeO2-Pd (AlCePd) catalysts containing trace amounts of Ce through the hydrolysis of cerium acetate, which achieved 100% CO conversion at 160 °C. More importantly, the activity remained at its initial 100% in the long-term durability testing, demonstrating the high stability of AlCePd. In contrast, the CO conversion of the CeO2-Pd (CePd) catalyst decreased from 100% to 54% within 3 h. Through comprehensive studies, we found that this excellent catalytic performance stems from the stabilizing effect of an alumina support and the possible reverse oxygen spillover effect of small-sized ceria components, where small-sized ceria components provide active oxygen for independent Pd species, making it possible for the CO adsorbed on Pd to react with this oxygen species.
Collapse
Affiliation(s)
- Xiaoxiao Han
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
- University of Science and Technology of China, Hefei 230026, China
| | - Lingling Zhang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
- University of Science and Technology of China, Hefei 230026, China
| | - Rui Zhang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
- University of Science and Technology of China, Hefei 230026, China
| | - Ke Wang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
- University of Science and Technology of China, Hefei 230026, China
| | - Xiao Wang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
- University of Science and Technology of China, Hefei 230026, China
| | - Bo Li
- Sinopec Research Institute of Petroleum Processing Co., Ltd., Beijing 100083, PR China.
| | - Zhiping Tao
- Sinopec Research Institute of Petroleum Processing Co., Ltd., Beijing 100083, PR China.
| | - Shuyan Song
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
- University of Science and Technology of China, Hefei 230026, China
| | - Hongjie Zhang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
- University of Science and Technology of China, Hefei 230026, China
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| |
Collapse
|
3
|
Zhao H, Bian L, Du J, Zhao Y. Moderating the interaction among Pd, CeO 2, and Al 2O 3 for improved three-way catalysts. Dalton Trans 2022; 51:18562-18571. [PMID: 36444876 DOI: 10.1039/d2dt02693g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The Pd distribution and the CeO2-Al2O3 combination are among the decisive factors for the performance of commercial three-way catalysts. Generally, the sufficient doping of Pd into ceria-based oxides and the intimate interaction between CeO2 and Al2O3 could both benefit the three-way catalytic reactions. However, in the present work, the moderate doping of Pd into CeO2 and less intimate CeO2-Al2O3 interaction were found to be responsible for the much higher catalytic activity (the decrease in T50 was 52, 119, or 55 °C for C3H6, CO, or NO) in PdCe/Al2O3-CP than PdCe/Al2O3-Imp, for which the Pd and Ce species were co-loaded onto Al2O3 through the co-precipitation or impregnation method, respectively. It was intriguing to find that the co-precipitated PdCeOx in PdCe/Al2O3-CP showed less sufficient doping of Pd into CeO2 than the co-impregnated PdCeOx in PdCe/Al2O3-Imp; as a result, both a higher fraction of highly active metallic Pd and a higher Pd dispersion were realized in PdCe/Al2O3-CP. Moreover, due to the less intimate CeO2-Al2O3 interaction, specifically the less severe penetration of the Pd and Ce species into Al2O3, PdCe/Al2O3-CP showed higher Pd dispersion, specific surface area, pore volume and size than PdCe/Al2O3-Imp. The presence of more abundant reactive Pd0, and the higher accessibility of the active Pd and CeO2 sites, together with improved redox properties and enriched oxygen vacancies contributed much to the enhanced three-way catalytic activity of PdCe/Al2O3-CP. Additionally, simultaneously optimizing the Pd distribution and the CeO2-Al2O3 combination in a single step, as reported in this work, is also highly desirable in industry.
Collapse
Affiliation(s)
- Han Zhao
- State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Institute of Precious Metals, Kunming 650106, China. .,Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Longchun Bian
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
| | - Junchen Du
- State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Institute of Precious Metals, Kunming 650106, China.
| | - Yunkun Zhao
- State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Institute of Precious Metals, Kunming 650106, China.
| |
Collapse
|
4
|
Tresatayawed A, Glinrun P, Autthanit C, Jongsomjit B. Pd Modification and Supporting Effects on Catalytic Dehydration of Ethanol to Ethylene and Diethyl Ether over W/TiO 2 Catalysts. J Oleo Sci 2020; 69:503-515. [PMID: 32378552 DOI: 10.5650/jos.ess19220] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In the present work, the palladium (Pd) modification and supporting effect of W/TiO2 catalysts on catalytic ethanol dehydration to ethylene and diethyl ether were investigated. The Pd modification with different sequence of Pd and W impregnation on the catalysts was prepared by the incipient wetness impregnation technique. The catalyst characterization and activity testing revealed that the different sequence during impregnation influenced the physicochemical properties and ethanol conversion of catalyst. The differences in structure and surface properties were investigated by XRD, BET, SEM, EDX, XPS and NH3-TPD. Upon the reaction temperature between 200 to 400°C, it was found that the conversion increased with increasing of temperature for all catalysts. The Pd incorporated into catalysts enhanced the ethanol conversion depending on the sequence of impregnation. At low temperature (ca. 200 to 300°C), diethyl ether is a major product and the Pd modification over W/TiO2 catalyst resulted in increased diethyl ether yield. This is because an increase of ethanol conversion was obtained with Pd modification, while diethyl ether selectivity did not change. This can be attributed to the higher amount of weak acids sites present after Pd modification into catalyst. Among all catalysts, the PdW/TiO2 catalyst (coimpregnation) achieved the highest diethyl ether yield of 41.4% at 300℃. At high temperature (ca. 350 to 400°C), ethylene is the major product. The W/Pd/TiO2 catalyst (with sequential impregnation of Pd on TiO2 followed by W) exhibited the highest ethylene yield of 68.1% at 400°C. It can be concluded that the modification of Pd onto W/TiO2 upon different sequence of Pd and W impregnation can improve the diethyl ether and ethylene yield in catalytic ethanol dehydration.
Collapse
Affiliation(s)
- Anchale Tresatayawed
- Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University
| | - Peangpit Glinrun
- Department of Petrochemicals and Environmental Management, Faculty of Engineering, Pathumwan Institute of Technology
| | - Chaowat Autthanit
- Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University
| | - Bunjerd Jongsomjit
- Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University
| |
Collapse
|
5
|
Particle Size and PdO–Support Interactions in PdO/CeO2-γ Al2O3 Catalysts and Effect on Methane Combustion. Catalysts 2020. [DOI: 10.3390/catal10090976] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
In this study, we investigated the effects of sequential impregnation in two PdO/CeO2/Al2O3 nanocatalysts (4Pd-20CeO2/Al2O3 and 20CeO2-4Pd/Al2O₃) on catalytic properties, particle sizes, and metal oxide–support interactions. Pulse chemisorption indicated significantly higher dispersion and smaller particle size in the 20CeO2-4Pd/Al2O₃ catalyst. STEM images of the 4Pd-20CeO2/Al2O₃ catalyst showed PdO nanoparticles on the surface of crystalline Al2O₃. In the 20CeO2-4Pd/Al2O3 catalyst, PdO nanoparticles were strongly embedded on ceria indicating PdO-ceria interactions. Both supports were on separate sites in the two catalysts suggesting weak interactions. PdO particle sizes were 6–12 nm in the 4Pd-20CeO2/Al2O₃ catalyst and 4–8 nm in the 20CeO2-4Pd/Al2O₃ catalyst. Methane conversion was 100% at 275 °C after a 20-min run with the 4Pd-20CeO2/Al2O3 catalyst compared to 25% conversion by the 20CeO2-4Pd/Al2O₃ catalyst under same conditions. The support alumina could stabilize the PdO species and facilitated oxygen migration on the surface and from the bulk in the 4Pd-20CeO2/Al2O3 catalyst. The lower activities in the 20CeO2-4Pd/Al2O₃ catalyst could be due to inaccessibility of PdO active sites at low temperature due to embedment of PdO nanoparticles on ceria. We could infer from our data that sequence of impregnation in catalyst synthesis could significantly influence catalytic properties and methane combustion due to PdO–support interactions.
Collapse
|
6
|
Liu J, Li J, Hou X, Xu C, Zhang X, Luo L. Thermal Stabilities of MCM-41-Modified Pd/Al 2O 3 for Ethanol Adsorption and Oxidation. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.9b06258] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jianying Liu
- College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China
| | - Junjie Li
- College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China
| | - Xiaoxiao Hou
- College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China
| | - Chenghua Xu
- College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China
| | - Xueqiao Zhang
- College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China
| | - Lanni Luo
- College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China
| |
Collapse
|
7
|
Li WJ, Wey MY. Core-shell design and well-dispersed Pd particles for three-way catalysis: Effect of halloysite nanotubes functionalized with Schiff base. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 675:397-407. [PMID: 31030146 DOI: 10.1016/j.scitotenv.2019.04.243] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 04/02/2019] [Accepted: 04/16/2019] [Indexed: 06/09/2023]
Abstract
In this study, we have described the synthesis of core@shell three-way catalyst with well-dispersed Pd nanoparticles which were intercalated into halloysite nanotubes (HNTs) material via ligand assistance. The prepared parameters of Pd@HNTs catalyst included amine source, the molar ratio of amine and aldehyde, and the addition of CeO2 promoter. As a result, Pd@HNTs performed a good dispersion of Pd particles and high stability, which is attributed to the strong interaction between Pd and HNTs with Schiff base ligands and the high thermal resistance of HNTs as a sintering barrier. Moreover, the results of various characteristic analyses revealed that Pd@HNT-E12 (ethylenediamine: salicylaldehyde in a molar ratio of 1:2) exhibited the highest gases conversion to the others, which has excellent redox ability. Furthermore, the addition of CeO2, which acted as both a promoter and a protector, could provide more oxygen vacancies for promoting NO reduction and CO and C3H8 oxidation at gradually elevated temperatures. Such core-shell catalyst Ce@Pd@HNT-E12 could avoid excess CeO2 penetrating into the pore volume of halloysite support and facilitate the three-way catalytic reaction.
Collapse
Affiliation(s)
- Wei-Jing Li
- Department of Environmental Engineering, National Chung Hsing University, Taichung 402, Taiwan, ROC
| | - Ming-Yen Wey
- Department of Environmental Engineering, National Chung Hsing University, Taichung 402, Taiwan, ROC.
| |
Collapse
|
8
|
Zhao F, Li S, Wu X, Yue R, Li W, Chen Y. Synergetic effect over flame-made manganese doped CuO–CeO2 nanocatalyst for enhanced CO oxidation performance. RSC Adv 2019; 9:2343-2352. [PMID: 35520527 PMCID: PMC9059897 DOI: 10.1039/c8ra09626k] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 01/03/2019] [Indexed: 11/21/2022] Open
Abstract
CuO–CeO2 nanocatalysts with different amounts of Mn dopping (Mn/Cu molar ratios of 0.5 : 5, 1 : 5 and 1.5 : 5) were synthesized by flame spray pyrolysis (FSP) method and tested in the catalytic oxidation of CO. The physicochemical properties of the synthesised samples were characterized systematically, including using X-ray diffraction (XRD), Raman spectroscopy, field-emission scanning electron microscopy (FESEM), Brunauer–Emmett–Teller (BET), X-ray photoelectron spectroscopy (XPS), oxygen-temperature programmed desorption (O2-TPD), hydrogen-temperature programmed reduction (H2-TPR) and in situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFTS). The results showed that the 1Mn–Cu–Ce sample (Mn/Cu molar ratio of 1 : 5) exhibited superior catalytic activity for CO oxidation, with the temperature of 90% CO oxidation at 131 °C at a high space velocity (SV = 60 000 mL g−1 h−1), which was 56 °C lower than that of the Cu–Ce sample. In addition, the 1Mn–Cu–Ce sample displays excellent stability with prolonged time on CO stream and the resistance to water vapor. The significantly enhanced activity was correlated with strong synergetic effect, leading to fine textual properties, abundant chemically adsorbed oxygen and high lattice oxygen mobility, which further induced more Cu+ species and less formation of carbon intermediates during the CO oxidation process detected by in situ DRIFTS analysis. This work will provide in-depth understanding of the synergetic effect on CO oxidation performances over Mn doped CuO–CeO2 composite catalysts through FSP method. The synergetic effect is promoted on Mn doped CuO–Ce O2 catalyst to induce less carbon intermediates to enhance CO oxidation performance.![]()
Collapse
Affiliation(s)
- Feng Zhao
- State Key Laboratory of Multi-phase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Shuangde Li
- State Key Laboratory of Multi-phase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Xiaofeng Wu
- State Key Laboratory of Multi-phase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Renliang Yue
- State Key Laboratory of Multi-phase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Weiman Li
- State Key Laboratory of Multi-phase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Yunfa Chen
- State Key Laboratory of Multi-phase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| |
Collapse
|