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Gong N, Zhang T, Tan M, Wang L, Yang J, Tan L, Yang G, Wu P, Wu Y, Tan Y. Realizing and Revealing Complex Isobutyl Alcohol Production over a Simple Cu–ZrO 2 Catalyst. ACS Catal 2023. [DOI: 10.1021/acscatal.2c05791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
Affiliation(s)
- Nana Gong
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Tao Zhang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | - Minghui Tan
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | - Liyan Wang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jiaqian Yang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Li Tan
- Institute of Molecular Catalysis and In Situ/Operando Studies, College of Chemistry, Fuzhou University, Fuzhou 350108, China
| | - Guohui Yang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | - Peng Wu
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yingquan Wu
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | - Yisheng Tan
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
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2
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Iqbal Z, Sadiq S, Sadiq M, Khan I, Saeed K. Effect of Microwave Irradiation on the Catalytic Activity of Tetragonal Zirconia: Selective Hydrogenation of Aldehyde. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2022. [DOI: 10.1007/s13369-021-05712-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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3
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Goyal P, Bhardwaj A, Mehta BK, Mehta D. Research article green synthesis of zirconium oxide nanoparticles (ZrO2NPs) using Helianthus annuus seed and their antimicrobial effects. J INDIAN CHEM SOC 2021. [DOI: 10.1016/j.jics.2021.100089] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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4
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Huang C, Zhu C, Zhang M, Lu Y, Wang Q, Qian H, Chen J, Fang K. Direct Conversion of Syngas to Higher Alcohols over a CuCoAl|t‐ZrO
2
Multifunctional Catalyst. ChemCatChem 2021. [DOI: 10.1002/cctc.202100293] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Chao Huang
- State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 Shanxi P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Can Zhu
- State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 Shanxi P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Mingwei Zhang
- State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 Shanxi P. R. China
| | - Yongwu Lu
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201203 P. R. China
| | - Qianhao Wang
- State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 Shanxi P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Heming Qian
- College of Chemistry and Chemical Engineering Northeast Petroleum University Daqing 163318 P. R. China
| | - Jiangang Chen
- State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 Shanxi P. R. China
| | - Kegong Fang
- State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 Shanxi P. R. China
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5
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The Effects of the Crystalline Phase of Zirconia on C–O Activation and C–C Coupling in Converting Syngas into Aromatics. Catalysts 2020. [DOI: 10.3390/catal10020262] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Zirconia has recently been used as an efficient catalyst in the conversion of syngas. The crystalline phases of ZrO2 in ZrO2/HZSM-5 bi-functional catalysts have important effects on C–O activation and C–C coupling in converting syngas into aromatics and been investigated in this work. Monoclinic ZrO2 (m-ZrO2) and tetragonal ZrO2 (t-ZrO2) were synthesized by hydrothermal and chemical precipitation methods, respectively. The results of in situ diffuse reflection infrared Fourier transform spectroscopy (DRIFTs) revealed that there were more active hydroxyl groups existing on the surface of m-ZrO2, and CO temperature programmed desorption (CO-TPD) results indicated that the CO adsorption capacity of m-ZrO2 was higher than that of t-ZrO2, which can facilitate the C–O activation of m-ZrO2 for syngas conversion compared to that of t-ZrO2. And the CO conversion on the m-ZrO2 catalyst was about 50% more than that on the t-ZrO2 catalyst. 31P and 13C magic angle spinning nuclear magnetic resonance (MAS NMR) analysis revealed a higher acid and base density of m-ZrO2 than that of t-ZrO2, which enhanced the C–C coupling. The selectivity to CH4 on the m-ZrO2 catalyst was about 1/5 of that on the t-ZrO2 catalyst in syngas conversion. The selectivity to C2+ hydrocarbons over m-ZrO2 or t-ZrO2 as well as the proximity of the ZrO2 sample and HZSM-5 greatly affected the further aromatization in converting syngas into aromatics.
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Vlasenko NV, Kyriienko PI, Valihura KV, Kosmambetova GR, Soloviev SO, Strizhak PE. Yttria-Stabilized Zirconia as a High-Performance Catalyst for Ethanol to n-Butanol Guerbet Coupling. ACS OMEGA 2019; 4:21469-21476. [PMID: 31867542 PMCID: PMC6921634 DOI: 10.1021/acsomega.9b03170] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Accepted: 11/19/2019] [Indexed: 05/14/2023]
Abstract
It has been shown that yttria-stabilized zirconia is an effective catalyst for ethanol to n-butanol Guerbet coupling. The variation of the calcination temperature allows an improvement in the catalytic characteristics of this material via stabilization of the tetragonal phase of zirconia, having higher basicity than the monoclinic one. The treatment of yttria-stabilized zirconia at an optimal calcination temperature of 500 °C induces the increase in surface basicity required for the aldol condensation step, along with a decrease in surface acidity, which is responsible for the side reaction such as ethylene formation. The catalyst obtained significantly exceeds in selectivity and n-butanol yield than individual zirconia and other oxide systems which have been studied in this reaction.
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7
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Effect of Preparation Method on ZrO2-Based Catalysts Performance for Isobutanol Synthesis from Syngas. Catalysts 2019. [DOI: 10.3390/catal9090752] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Two types of amorphous ZrO2 (am-ZrO2) catalysts were prepared by different co-precipitation/reflux digestion methods (with ethylenediamine and ammonia as the precipitant respectively). Then, copper and potassium were introduced for modifying ZrO2 via an impregnation method to enhance the catalytic performance. The obtained catalysts were further characterized by means of Brunauer-Emmett-Teller surface areas (BET), X-ray diffraction (XRD), H2-temperature-programmed reduction (H2-TPR), and In situ diffuse reflectance infrared spectroscopy (in situ DRIFTS). CO hydrogenation experiments were performed in a fixed-bed reactor for isobutanol synthesis. Great differences were observed on the distribution of alcohols over the two types of ZrO2 catalysts, which were promoted with the same content of Cu and K. The selectivity of isobutanol on K-CuZrO2 (ammonia as precipitant, A-KCZ) was three times higher than that on K-CuZrO2 (ethylenediamine as precipitant, E-KCZ). The characterization results indicated that the A-KCZ catalyst supplied more active hydroxyls (isolated hydroxyls) for anchoring and dispersing Cu. More importantly, it was found that bicarbonate species were formed, which were ascribed as important C1 species for isobutanol formation on the A-KCZ catalyst surface. These C1 intermediates had relatively stronger adsorption strength than those adsorbed on the E-KCZ catalyst, indicating that the bicarbonate species on the A-KCZ catalyst had a longer residence time for further carbon chain growth. Therefore, the selectivity of isobutanol was greatly enhanced. These findings would extend the horizontal of direct alcohols synthesis from syngas.
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9
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Wu Y, Zhang J, Zhang T, Sun K, Wang L, Xie H, Tan Y. Effect of Potassium on the Regulation of C1 Intermediates in Isobutyl Alcohol Synthesis from Syngas over CuLaZrO2 Catalysts. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b01436] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yingquan Wu
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | - Junfeng Zhang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | - Tao Zhang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | - Kai Sun
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Liyan Wang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hongjuan Xie
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | - Yisheng Tan
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
- National Engineering Research Center for Coal-Based Synthesis, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
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10
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Li H, Wang X. Phase Control in Inorganic Nanocrystals through Finely Tuned Growth at an Ultrathin Scale. Acc Chem Res 2019; 52:780-790. [PMID: 30747512 DOI: 10.1021/acs.accounts.8b00645] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Crystalline polymorphs have been considered a prevailing phenomenon in inorganic nanocrystals and provide approaches to modulate fundamental properties and innovative advanced applications. As a basic demand for phase engineering, accessible and controllable synthetic methodologies are indispensable for acquisition of high-quality products in expected phases. Phase stability is also a non-negligible issue that determines continuous gains of functionality and long-term sustainability of characteristic features. Maintaining structural stability of metastable phases provides challenges and opportunities for investigations on fascinating properties and intriguing applications of inorganic nanocrystals. Phase engineering is of great significance to acquire metallic (1T) and semiconducting (2H) Mo- and W-based dichalcogenides for hydrogen evolution reaction (HER) and CO2 reduction reaction (CO2RR), respectively. The catalysts in 1T phase have superior electron transfer kinetics and abundant active sites on both basal planes and edges for HER, while ones in 2H phase are preferentially deployed for CO2RR to utilize edge sites for catalysis and restrain competitive HER activity. In addition, the photocatalytic performance for HER has been enhanced by combining anatase and rutile phases because electron transfer between the two phases during photocatalysis facilitates the separation of charge carriers and thus impedes the recombination of electron-hole pairs. Although ample effort has been devoted to developing phase engineering, principle understanding at an ultrathin scale remains obscure. In this Account, we provide comprehensive insight into work from our group regarding controllable synthesis of inorganic nanocrystals with phase engineering, critical effects on phase stability, and noteworthy studies on phase-related properties and applications. For bulk materials, phase control and transition have a large energy barrier, so they can only be achieved under rigorous conditions. However, at the initial stage of synthesis, especially for nucleation, there are a small quantity of chemical bonds that contribute to regulate phase and structure with ease. In our work, we mainly modulate nucleation and growth at an ultrathin scale to demonstrate facile approaches for phase engineering. This unique perspective makes for a distinct guidance of controllable synthesis and deliberate stabilization of inorganic nanomaterials with phase engineering. We have developed a series of synthetic strategies for phase engineering to fabricate inorganic nanocrystals in a specific phase with controlled size and composition and adjustable morphologies and surface features. Four sorts of models (MoS2, ZrO2, In2O3, and TiO2) are used for demonstrating finely tuned growth at an ultrathin scale. However, phase engineering has been regarded as immature because only one phase in polymorphs is thermodynamically stable generally. Phase stability of metastable nanocrystals has attracted much interest. Our substantial investigations illustrate several crucial factors on phase stability, leading to inspiration for facilitating persistent emergence of characteristics and functionalities. By full use of the features of a specific phase, we spotlight ligand-induced surface interactions on coverage-dependent electronic structures and chemisorption effects at one-unit thickness of TiO2(B) nanomaterials with phase engineering. Meanwhile, an energy conversion system for overall water splitting (OWS) drives forward steps in function-oriented synthesis of MoS2-based nanomaterials with phase engineering. In the last section, we summarize this theme and highlight several promising directions for future development.
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Affiliation(s)
- Haoyi Li
- Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Xun Wang
- Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China
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11
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Izquierdo-Colorado A, Torres-Torres G, Gamboa-Rodríguez MT, Silahua-Pavón AA, Arévalo-Pérez JC, Cervantes-Uribe A, Cordero-García A, Beltramini JN. Catalytic Wet Air Oxidation (CWAO) of Phenol in a Fixed Bed Reactor Using Supported Ru and Ru-Au Catalysts: Effect of Gold and Ce Loading. ChemistrySelect 2019. [DOI: 10.1002/slct.201802958] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Armando Izquierdo-Colorado
- Universidad Juárez Autónoma de Tabasco; DACBiol; Carretera Villahermosa-Cárdenas Km 0.5 S/N Entronque a Bosques de Saloya C.P. 86150 Villahermosa, Tabasco México
- Sorbonne Université, CNRS; Institut Jean Le Rond d'Alembert; F-78210 St Cyr L'Ecole France
| | - Gilberto Torres-Torres
- Universidad Juárez Autónoma de Tabasco, Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energía y Remediación Ambiental; Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB; Km. 1 carretera Cunduacán-Jalpa de Méndez AP. 24 C.P. 86690 Cunduacán Tabasco México
| | - María Teresa Gamboa-Rodríguez
- Universidad Juárez Autónoma de Tabasco; DACBiol; Carretera Villahermosa-Cárdenas Km 0.5 S/N Entronque a Bosques de Saloya C.P. 86150 Villahermosa, Tabasco México
| | - Adib Abiu Silahua-Pavón
- Universidad Juárez Autónoma de Tabasco, Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energía y Remediación Ambiental; Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB; Km. 1 carretera Cunduacán-Jalpa de Méndez AP. 24 C.P. 86690 Cunduacán Tabasco México
| | - Juan C. Arévalo-Pérez
- Universidad Juárez Autónoma de Tabasco, Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energía y Remediación Ambiental; Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB; Km. 1 carretera Cunduacán-Jalpa de Méndez AP. 24 C.P. 86690 Cunduacán Tabasco México
| | - Adrián Cervantes-Uribe
- Universidad Juárez Autónoma de Tabasco, Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energía y Remediación Ambiental; Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB; Km. 1 carretera Cunduacán-Jalpa de Méndez AP. 24 C.P. 86690 Cunduacán Tabasco México
| | - Adrián Cordero-García
- Universidad Juárez Autónoma de Tabasco, Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energía y Remediación Ambiental; Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB; Km. 1 carretera Cunduacán-Jalpa de Méndez AP. 24 C.P. 86690 Cunduacán Tabasco México
| | - Jorge N. Beltramini
- ARC Centre of Excellence for Functional Nanomaterials, The Australian Institute for Bioengineering and Nanotechnology and School of Engineering; The University of Queensland; St. Lucia QLD 4072 Australia
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12
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Wu Y, Gong N, Zhang M, Zhang W, Zhang T, Zhang J, Wang L, Xie H, Tan Y. Insight into the branched alcohol formation mechanism on K–ZnCr catalysts from syngas. Catal Sci Technol 2019. [DOI: 10.1039/c9cy00542k] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first C–C bond formation is from the reaction of CO and CHO (formyl) on the K–ZnCr catalysts.
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Affiliation(s)
- Yingquan Wu
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry, Chinese Academy of Sciences
- Taiyuan 030001
- China
| | - Nana Gong
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry, Chinese Academy of Sciences
- Taiyuan 030001
- China
- University of Chinese Academy of Sciences
| | - Min Zhang
- Technology Center
- Shanxi Lu'an Mining (Group) Co.,Ltd
- Changzhi City
- P.R.China
| | - Wei Zhang
- Technology Center
- Shanxi Lu'an Mining (Group) Co.,Ltd
- Changzhi City
- P.R.China
| | - Tao Zhang
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry, Chinese Academy of Sciences
- Taiyuan 030001
- China
| | - Junfeng Zhang
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry, Chinese Academy of Sciences
- Taiyuan 030001
- China
| | - Liyan Wang
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry, Chinese Academy of Sciences
- Taiyuan 030001
- China
- University of Chinese Academy of Sciences
| | - Hongjuan Xie
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry, Chinese Academy of Sciences
- Taiyuan 030001
- China
| | - Yisheng Tan
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry, Chinese Academy of Sciences
- Taiyuan 030001
- China
- National Engineering Research Center for Coal-Based Synthesis
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13
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Karthik K, Madhukara Naik M, Shashank M, Vinuth M, Revathi V. Microwave-Assisted ZrO2 Nanoparticles and Its Photocatalytic and Antibacterial Studies. J CLUST SCI 2018. [DOI: 10.1007/s10876-018-1484-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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14
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Nagaiah P, Pramod CV, Venkata Rao M, David Raju B, Rama Rao KS. Product Selectivity as a Function of ZrO2 Phase in Cu/ZrO2 Catalysts in the Conversion of Cyclohexanol. Catal Letters 2018. [DOI: 10.1007/s10562-018-2473-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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15
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Gao X, Wu Y, Zhang T, Wang L, Li X, Xie H, Tan Y. Binary ZnO/Zn–Cr nanospinel catalysts prepared by a hydrothermal method for isobutanol synthesis from syngas. Catal Sci Technol 2018. [DOI: 10.1039/c8cy00030a] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A series of binary ZnO/Zn–Cr nanospinel catalysts were prepared by a hydrothermal method and applied in direct synthesis of isobutanol from syngas, during which the effect of the hydrothermal time/temperature on their catalytic performance in the isobutanol synthesis has been investigated at 400 °C and 10 MPa.
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Affiliation(s)
- Xiaofeng Gao
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- China
| | - Yingquan Wu
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- China
| | - Tao Zhang
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- China
| | - Liyan Wang
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- China
| | - Xiaoli Li
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- China
| | - Hongjuan Xie
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- China
| | - Yisheng Tan
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- China
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16
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Han T, Zhao L, Liu G, Ning H, Yue Y, Liu Y. Rh-Fe alloy derived from YRh0.5Fe0.5O3/ZrO2 for higher alcohols synthesis from syngas. Catal Today 2017. [DOI: 10.1016/j.cattod.2017.05.057] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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17
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Bajpai S, Singh S, Srivastava V. Monoclinic zirconia nanoparticle-catalyzed regioselective synthesis of some novel substituted spirooxindoles through one-pot multicomponent reaction in a ball mill: A step toward green and sustainable chemistry. SYNTHETIC COMMUN 2017. [DOI: 10.1080/00397911.2017.1336244] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Shivam Bajpai
- Department of Chemistry, Indian Institute of Technology (BHU), Varanasi, Uttar Pradesh, India
| | - Sundaram Singh
- Department of Chemistry, Indian Institute of Technology (BHU), Varanasi, Uttar Pradesh, India
| | - Vandana Srivastava
- Department of Chemistry, Indian Institute of Technology (BHU), Varanasi, Uttar Pradesh, India
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18
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A Comparative Discussion of the Catalytic Activity and CO2-Selectivity of Cu-Zr and Pd-Zr (Intermetallic) Compounds in Methanol Steam Reforming. Catalysts 2017. [DOI: 10.3390/catal7020053] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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19
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Liu JX, Li WX. Theoretical study of crystal phase effect in heterogeneous catalysis. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2016. [DOI: 10.1002/wcms.1267] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jin-Xun Liu
- College of Chemistry and Material Sciences, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), CAS Center for Excellence in Nanoscience; University of Science and Technology of China; Hefei China
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei China
| | - Wei-Xue Li
- College of Chemistry and Material Sciences, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), CAS Center for Excellence in Nanoscience; University of Science and Technology of China; Hefei China
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei China
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20
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Wang S, Xie H, Lin Y, Poeppelmeier KR, Li T, Winans RE, Cui Y, Ribeiro FH, Canlas CP, Elam JW, Zhang H, Marshall CL. High Thermal Stability of La2O3- and CeO2-Stabilized Tetragonal ZrO2. Inorg Chem 2016; 55:2413-20. [PMID: 26878202 DOI: 10.1021/acs.inorgchem.5b02810] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Catalyst support materials of tetragonal ZrO2, stabilized by either La2O3 (La2O3-ZrO2) or CeO2 (CeO2-ZrO2), were synthesized under hydrothermal conditions at 200 °C with NH4OH or tetramethylammonium hydroxide as the mineralizer. From in situ synchrotron powder X-ray diffraction and small-angle X-ray scattering measurements, the calcined La2O3-ZrO2 and CeO2-ZrO2 supports were nonporous nanocrystallites that exhibited rectangular shapes with a thermal stability of up to 1000 °C in air. These supports had an average size of ∼ 10 nm and a surface area of 59-97 m(2)/g. The catalysts Pt/La2O3-ZrO2 and Pt/CeO2-ZrO2 were prepared by using atomic layer deposition with varying Pt loadings from 6.3 to 12.4 wt %. Monodispersed Pt nanoparticles of ∼ 3 nm were obtained for these catalysts. The incorporation of La2O3 and CeO2 into the t-ZrO2 structure did not affect the nature of the active sites for the Pt/ZrO2 catalysts for the water-gas shift reaction.
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Affiliation(s)
- Shichao Wang
- Center for Catalysis and Surface Science, Department of Chemistry, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Hong Xie
- Center for Catalysis and Surface Science, Department of Chemistry, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Yuyuan Lin
- Center for Catalysis and Surface Science, Department of Chemistry, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Kenneth R Poeppelmeier
- Center for Catalysis and Surface Science, Department of Chemistry, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Tao Li
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Randall E Winans
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Yanran Cui
- School of Chemical Engineering, Purdue University , 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Fabio H Ribeiro
- School of Chemical Engineering, Purdue University , 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Christian P Canlas
- Energy Systems Division, Argonne National Laboratory , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Jeffrey W Elam
- Energy Systems Division, Argonne National Laboratory , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Hongbo Zhang
- Chemical Sciences and Engineering Division, Argonne National Laboratory , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Christopher L Marshall
- Chemical Sciences and Engineering Division, Argonne National Laboratory , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
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21
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Mayr L, Shi XR, Köpfle N, Milligan CA, Zemlyanov DY, Knop-Gericke A, Hävecker M, Klötzer B, Penner S. Chemical vapor deposition-prepared sub-nanometer Zr clusters on Pd surfaces: promotion of methane dry reforming. Phys Chem Chem Phys 2016; 18:31586-31599. [DOI: 10.1039/c6cp07197j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
An inverse Pd–Zr model catalyst was prepared by chemical vapor deposition (CVD) using zirconium-t-butoxide (ZTB) as an organometallic precursor.
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Affiliation(s)
- Lukas Mayr
- Institute of Physical Chemistry
- University of Innsbruck
- Innsbruck
- Austria
- Birck Nanotechnology Center
| | - Xue-Rong Shi
- Institute of Physical Chemistry
- University of Innsbruck
- Innsbruck
- Austria
| | - Norbert Köpfle
- Institute of Physical Chemistry
- University of Innsbruck
- Innsbruck
- Austria
| | - Cory A. Milligan
- Birck Nanotechnology Center
- Purdue University
- West Lafayette
- USA
- School of Chemical Engineering
| | | | - Axel Knop-Gericke
- Department of Inorganic Chemistry
- Fritz-Haber-Institute of the Max-Planck-Society
- D-14195 Berlin
- Germany
| | - Michael Hävecker
- Department of Inorganic Chemistry
- Fritz-Haber-Institute of the Max-Planck-Society
- D-14195 Berlin
- Germany
| | - Bernhard Klötzer
- Institute of Physical Chemistry
- University of Innsbruck
- Innsbruck
- Austria
| | - Simon Penner
- Institute of Physical Chemistry
- University of Innsbruck
- Innsbruck
- Austria
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22
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De Keukeleere K, De Roo J, Lommens P, Martins JC, Van Der Voort P, Van Driessche I. Fast and Tunable Synthesis of ZrO2 Nanocrystals: Mechanistic Insights into Precursor Dependence. Inorg Chem 2015; 54:3469-76. [DOI: 10.1021/acs.inorgchem.5b00046] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Jonathan De Roo
- NMR
and Structural Analysis Unit, Ghent University, Krijgslaan 281 S4, 9000 Gent, Belgium
| | | | - José C. Martins
- NMR
and Structural Analysis Unit, Ghent University, Krijgslaan 281 S4, 9000 Gent, Belgium
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23
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Mayr L, Klötzer B, Zemlyanov D, Penner S. Steering of methanol reforming selectivity by zirconia–copper interaction. J Catal 2015. [DOI: 10.1016/j.jcat.2014.10.012] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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24
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Bajpai S, Singh S, Srivastava V. Nano zirconia catalysed one-pot synthesis of some novel substituted imidazoles under solvent-free conditions. RSC Adv 2015. [DOI: 10.1039/c4ra16211k] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A highly efficient method for the synthesis of substituted imidazoles from a multicomponent reaction of isatin derivatives with ammonium acetate and aromatic aldehydes under solvent-free conditions has been established.
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Affiliation(s)
- Shivam Bajpai
- Department of Chemistry
- Indian Institute of Technology (BHU)
- Varanasi-221 005
- India
| | - Sundaram Singh
- Department of Chemistry
- Indian Institute of Technology (BHU)
- Varanasi-221 005
- India
| | - Vandana Srivastava
- Department of Chemistry
- Indian Institute of Technology (BHU)
- Varanasi-221 005
- India
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25
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Kogler M, Köck EM, Bielz T, Pfaller K, Klötzer B, Schmidmair D, Perfler L, Penner S. Hydrogen Surface Reactions and Adsorption Studied on Y 2O 3, YSZ, and ZrO 2. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2014; 118:8435-8444. [PMID: 24791182 PMCID: PMC4001439 DOI: 10.1021/jp5008472] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Revised: 04/01/2014] [Indexed: 05/27/2023]
Abstract
The surface reactivity of Y2O3, YSZ, and ZrO2 polycrystalline powder samples toward H2 has been comparatively studied by a pool of complementary experimental techniques, comprising volumetric methods (temperature-programmed volumetric adsorption/oxidation and thermal desorption spectrometry), spectroscopic techniques (in situ electric impedance and in situ Fourier-transform infrared spectroscopy), and eventually structural characterization methods (X-ray diffraction and scanning electron microscopy). Reduction has been observed on all three oxides to most likely follow a surface or near-surface-limited mechanism involving removal of surface OH-groups and associated formation of water without formation of a significant number of anionic oxygen vacancies. Partly reversible adsorption of H2 was proven on the basis of molecular H2 desorption. Dictated by the specific hydrophilicity of the oxide, readsorption of water eventually takes place. The inference of this surface-restricted mechanism is further corroborated by the fact that no bulk structural and/or morphological changes were observed upon reduction even at the highest reduction temperatures (1173 K). We anticipate relevant implications for the use of especially YSZ in fuel cell research, since in particular the chemical state and structure of the surface under typical reducing high-temperature conditions affects the operation of the entire cell.
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Affiliation(s)
- Michaela Kogler
- Institute
of Physical Chemistry, University of Innsbruck, Innrain 52a, A-6020 Innsbruck, Austria
| | - Eva-Maria Köck
- Institute
of Physical Chemistry, University of Innsbruck, Innrain 52a, A-6020 Innsbruck, Austria
| | - Thomas Bielz
- Institute
of Physical Chemistry, University of Innsbruck, Innrain 52a, A-6020 Innsbruck, Austria
| | - Kristian Pfaller
- Section
of Histology and Embryology, Medical University
Innsbruck, Müllerstrasse
59, A-6020 Innsbruck, Austria
| | - Bernhard Klötzer
- Institute
of Physical Chemistry, University of Innsbruck, Innrain 52a, A-6020 Innsbruck, Austria
| | - Daniela Schmidmair
- Institute
of Mineralogy and Petrography, University
of Innsbruck, Innrain
52d, A-6020 Innsbruck, Austria
| | - Lukas Perfler
- Institute
of Mineralogy and Petrography, University
of Innsbruck, Innrain
52d, A-6020 Innsbruck, Austria
| | - Simon Penner
- Institute
of Physical Chemistry, University of Innsbruck, Innrain 52a, A-6020 Innsbruck, Austria
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26
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Microwave synthesis, characterization, and photoluminescence properties of nanocrystalline zirconia. ScientificWorldJournal 2014; 2014:349457. [PMID: 24578628 PMCID: PMC3918870 DOI: 10.1155/2014/349457] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Accepted: 10/24/2013] [Indexed: 11/27/2022] Open
Abstract
We report synthesis of ZrO2 nanoparticles (NPs) using microwave assisted chemical method at 80°C temperature. Synthesized ZrO2 NPs were calcinated at 400°C under air atmosphere and characterized using FTIR, XRD, SEM, TEM, BET, and EDS for their formation, structure, morphology, size, and elemental composition. XRD results revealed the formation of mixed phase monoclinic and tetragonal ZrO2 phases having crystallite size of the order 8.8 nm from most intense XRD peak as obtained using Scherrer formula. Electron microscope analysis shows that the NPs were less than 10 nm and highly uniform in size having spherical morphology. BET surface area of ZrO2 NPs was found to be 65.85 m2/g with corresponding particle size of 16 nm. The band gap of synthesized NPs was found to be 2.49 eV and PL spectra of ZrO2 synthesized NPs showed strong peak at 414 nm, which corresponds to near band edge emission (UV emission) and a relatively weak peak at 475 and 562 nm.
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27
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Taguchi M, Nakane T, Matsushita A, Sakka Y, Uchikoshi T, Funazukuri T, Naka T. One-pot synthesis of monoclinic ZrO2 nanocrystals under subcritical hydrothermal conditions. J Supercrit Fluids 2014. [DOI: 10.1016/j.supflu.2013.11.001] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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28
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Liu J, Tao R, Guo Z, Regalbuto JR, Marshall CL, Klie RF, Miller JT, Meyer RJ. Selective Adsorption of Manganese onto Rhodium for Optimized Mn/Rh/SiO2Alcohol Synthesis Catalysts. ChemCatChem 2013. [DOI: 10.1002/cctc.201300479] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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29
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Yu X, Zhu WC, Gao S, Chen LL, Yuan HJ, Luo JH, Wang ZL, Zhang WX. Transformation of ethanol to ethyl acetate over Cu/SiO2 catalysts modified by ZrO2. Chem Res Chin Univ 2013. [DOI: 10.1007/s40242-013-3024-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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30
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Yu L, Du XL, Yuan J, Liu YM, Cao Y, He HY, Fan KN. A versatile aqueous reduction of bio-based carboxylic acids using syngas as a hydrogen source. CHEMSUSCHEM 2013; 6:42-46. [PMID: 23143770 DOI: 10.1002/cssc.201200674] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Indexed: 06/01/2023]
Abstract
Syngas as a versatile hydrogen source: Using readily available and economically favorable syngas as a convenient hydrogen source, an efficient and sustainable aqueous reduction of bio-based carboxylic acids has been achieved over a highly robust catalyst system consisting of gold nanoparticles supported on acid-tolerant single-phase monoclinic zirconia (Au/m-ZrO(2)). A range of bio-based multifunctional carboxylic acids have been selectively converted into their corresponding lactones or diols in high to excellent yields.
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Affiliation(s)
- Lei Yu
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Handan Road 220, Shanghai 200433, PR China
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31
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Zhou G, Liu J, Tan X, Pei Y, Qiao M, Fan K, Zong B. Effect of Support Acidity on Liquid-Phase Hydrogenation of Benzene to Cyclohexene over Ru–B/ZrO2Catalysts. Ind Eng Chem Res 2012. [DOI: 10.1021/ie301302x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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32
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Taguchi M, Takami S, Adschiri T, Nakane T, Sato K, Naka T. Synthesis of surface-modified monoclinic ZrO2 nanoparticles using supercritical water. CrystEngComm 2012. [DOI: 10.1039/c2ce06409j] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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33
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Taguchi M, Takami S, Adschiri T, Nakane T, Sato K, Naka T. Simple and rapid synthesis of ZrO2 nanoparticles from Zr(OEt)4 and Zr(OH)4 using a hydrothermal method. CrystEngComm 2012. [DOI: 10.1039/c2ce06408a] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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34
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Ávila-Brande D, Perezzan R, Urones-Garrote E, Otero-Díaz LC. Chlorination and Solvothermal Treatment of Zr(C5H5)2Cl2: a Synthetic Combination to Produce Nanometric Tetragonal ZrO2. Inorg Chem 2011; 50:4640-6. [DOI: 10.1021/ic2004112] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- D. Ávila-Brande
- Departamento de Química Inorgánica I, ‡Departamento de Química Física I, Fac. CC. Químicas, and §Centro Nacional de Microscopía Electrónica, Universidad Complutense, 28040 Madrid, Spain
| | - R. Perezzan
- Departamento de Química Inorgánica I, ‡Departamento de Química Física I, Fac. CC. Químicas, and §Centro Nacional de Microscopía Electrónica, Universidad Complutense, 28040 Madrid, Spain
| | - E. Urones-Garrote
- Departamento de Química Inorgánica I, ‡Departamento de Química Física I, Fac. CC. Químicas, and §Centro Nacional de Microscopía Electrónica, Universidad Complutense, 28040 Madrid, Spain
| | - L. C. Otero-Díaz
- Departamento de Química Inorgánica I, ‡Departamento de Química Física I, Fac. CC. Químicas, and §Centro Nacional de Microscopía Electrónica, Universidad Complutense, 28040 Madrid, Spain
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35
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Sato K, Abe H, Ohara S. Selective Growth of Monoclinic and Tetragonal Zirconia Nanocrystals. J Am Chem Soc 2010; 132:2538-9. [DOI: 10.1021/ja910712r] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kazuyoshi Sato
- Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka 567-0047 Japan
| | - Hiroya Abe
- Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka 567-0047 Japan
| | - Satoshi Ohara
- Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka 567-0047 Japan
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36
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Effect of acid–base characteristics of ZrO2–Y2O3 on catalytic properties in carboxylation of methanol. THEOR EXP CHEM+ 2009. [DOI: 10.1007/s11237-009-9094-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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37
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Li W, Huang H, Li H, Zhang W, Liu H. Facile synthesis of pure monoclinic and tetragonal zirconia nanoparticles and their phase effects on the behavior of supported molybdena catalysts for methanol-selective oxidation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:8358-8366. [PMID: 18582130 DOI: 10.1021/la800370r] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Pure monoclinic (m) and tetragonal (t) zirconia nanoparticles were readily synthesized from the reaction of inorganic zirconium salts (e.g., hydrated zirconyl nitrate) and urea in water and methanol, respectively, via a facile solvothermal method. The role of the solvents was crucial in the formation of the pure ZrO(2) phases, whereas their purity was essentially insensitive to other variables, including reaction temperature, reactant concentration, pH, and zirconium salts. Water as the solvent led to the transformation of hydrous ZrO(2) precipitates initially formed with tetragonal structures to thermodynamically more stable m-ZrO(2) via the dissolution-precipitation process, whereas methanol favored the removal of water molecules from the precursors via their reaction with urea, consequently maintaining the tetragonal structures. The obtained tetragonal samples were found to possess superior hydrothermal stability compared to those reported previously, which provides the possibility for systematically studying the effects of ZrO(2) phases on many catalytic reactions involving water as a reactant or product. Using these pure m- and t-ZrO(2) phases as supports, dispersed MoO(x) catalysts were synthesized at MoO(x) surface densities of approximately 5.0 Mo/nm(2), which is close to one monolayer of coverage. Characterization by X-ray diffraction and Raman spectroscopy confirmed that the pure ZrO(2) phases remained unchanged in the presence of the MoO(x) domains and the MoO(x) domains existed preferentially as 2D polymolybdate structures. The catalysts were subsequently examined for selective methanol oxidation as a test reaction. m-ZrO(2) support led to 2-fold greater oxidation rates than for t-ZrO(2) support, reflecting the higher intrinsic reactivity of the MoO(x) domains on m-ZrO(2). This is consistent with their higher reducibility probed by temperature-programmed reduction with H(2) (H(2) TPR). These observed effects of the ZrO(2) phases provide the basis for designing catalysts with tunable redox properties and reactivity.
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Affiliation(s)
- Weizhen Li
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Stable and Unstable Species, College of Chemistry and Molecular Engineering, Green Chemistry Center, Peking University, Beijing 100871, China
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38
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Hussain ST, Nadeem MA, Mazhar M. Effect of potassium addition on the product selectivity of Ru:Mn/alumina supported catalyst system for Fischer–Tropsch reaction. CATAL COMMUN 2008. [DOI: 10.1016/j.catcom.2008.03.050] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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39
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Characterization and reductive amination of cyclohexanol and cyclohexanone over Cu/ZrO2 catalysts. CATAL COMMUN 2008. [DOI: 10.1016/j.catcom.2007.05.016] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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40
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