1
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Laan PCM, Mekkering MJ, de Zwart FJ, Troglia A, Bliem R, Zhao K, Geels NJ, de Bruin B, Rothenberg G, Reek JNH, Yan N. Tuning catalytic performance of platinum single atoms by choosing the shape of cerium dioxide supports. Catal Sci Technol 2024:d4cy00484a. [PMID: 39156760 PMCID: PMC11322700 DOI: 10.1039/d4cy00484a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2024] [Accepted: 07/27/2024] [Indexed: 08/20/2024]
Abstract
The local coordination environment of single atom catalysts (SACs) often determines their catalytic performance. To understand these metal-support interactions, we prepared Pt SACs on cerium dioxide (CeO2) cubes, octahedra and rods, with well-structured exposed crystal facets. The CeO2 crystals were characterized by SEM, TEM, pXRD, and N2 sorption, confirming the shape-selective synthesis, identical bulk structure, and variations in specific surface area, respectively. EPR, XPS, TEM and XANES measurements showed differences in the oxygen vacancy density following the trend rods > octahedra > cubes. AC-HAADF-STEM, XPS and CO-DRIFTS measurements confirmed the presence of only single Pt2+ sites, with different surface platinum surface concentrations. We then compared the performance of the three catalysts in ammonia borane hydrolysis. Precise monitoring of reaction kinetics between 30-80 °C gave Arrhenius plots with hundreds of data points. All plots showed a clear inflection point, the temperature of which (rods > octahedra > cubes) correlates to the energy barrier of ammonia borane diffusion to the Pt sites. These activity differences reflect variations in the - facet dependent - degree of stabilization of intermediates by surface oxygen lone pairs and surface-metal binding strength. Our results show how choosing the right macroscopic support shape can give control over single atom catalysed reactions on the microscopic scale.
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Affiliation(s)
- Petrus C M Laan
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam Science Park 904 1098XH Amsterdam The Netherlands
| | - Martijn J Mekkering
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam Science Park 904 1098XH Amsterdam The Netherlands
| | - Felix J de Zwart
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam Science Park 904 1098XH Amsterdam The Netherlands
| | - Alessandro Troglia
- Advanced Research Center for Nanolithography (ARCNL) Science Park 106 1098XG Amsterdam The Netherlands
| | - Roland Bliem
- Advanced Research Center for Nanolithography (ARCNL) Science Park 106 1098XG Amsterdam The Netherlands
| | - Kai Zhao
- Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, School of Physics and Technology, Wuhan University Wuhan 430072 China
| | - Norbert J Geels
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam Science Park 904 1098XH Amsterdam The Netherlands
| | - Bas de Bruin
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam Science Park 904 1098XH Amsterdam The Netherlands
| | - Gadi Rothenberg
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam Science Park 904 1098XH Amsterdam The Netherlands
| | - Joost N H Reek
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam Science Park 904 1098XH Amsterdam The Netherlands
| | - Ning Yan
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam Science Park 904 1098XH Amsterdam The Netherlands
- Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, School of Physics and Technology, Wuhan University Wuhan 430072 China
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2
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Mekkering MJ, Laan PCM, Troglia A, Bliem R, Kizilkaya AC, Rothenberg G, Yan N. Bottom-Up Synthesis of Platinum Dual-Atom Catalysts on Cerium Oxide. ACS Catal 2024; 14:9850-9859. [PMID: 38988652 PMCID: PMC11232020 DOI: 10.1021/acscatal.4c01840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 05/30/2024] [Accepted: 06/03/2024] [Indexed: 07/12/2024]
Abstract
We present here the synthesis and performance of dual-atom catalysts (DACs), analogous to well-known single-atom catalysts (SACs). DACs feature sites containing pairs of metal atoms and can outperform SACs due to their additional binding possibilities. Yet quantifying the improved catalytic activity in terms of proximity effects remains difficult, as it requires both high-resolution kinetic data and an understanding of the reaction pathways. Here, we use an automated bubble counter setup for comparing the catalytic performance of ceria-supported platinum SACs and DACs in ammonia borane hydrolysis. The catalysts were synthesized by wet impregnation and characterized using SEM, HAADF-STEM, XRD, XPS, and CO-DRIFTS. High-precision kinetic studies of ammonia borane hydrolysis in the presence of SACs show two temperature-dependent regions, with a transition point at 43 °C. Conversely, the DACs show only one regime. We show that this is because DACs preorganize both ammonia borane and water at the dual-atom active site. The additional proximal Pt atom improves the reaction rate 3-fold and enables faster reactions at lower temperatures. We suggest that the DACs enable the activation of the water-O-H bond as well as increase the hydrogen spillover effect due to the adjacent Pt site. Interestingly, using ammonia borane hydrolysis as a benchmark reaction gives further insight into hydrogen spillover mechanisms, above what is known from the CO oxidation studies.
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Affiliation(s)
- Martijn J Mekkering
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Petrus C M Laan
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Alessandro Troglia
- Advanced Research Center for Nanolithography (ARCNL), Science Park 106, 1098 XG Amsterdam, The Netherlands
| | - Roland Bliem
- Advanced Research Center for Nanolithography (ARCNL), Science Park 106, 1098 XG Amsterdam, The Netherlands
| | - Ali C Kizilkaya
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
- Department of Chemical Engineering, Izmir Institute of Technology, 35430 Urla, Izmir, Turkey
| | - Gadi Rothenberg
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Ning Yan
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
- Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China
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3
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Meeus EJ, Laan PCM, Ham R, de Bruin B, Reek JNH. Gas Evolution as a Tool to Study Reaction Kinetics Under Biomimetic Conditions. Chemistry 2024; 30:e202400516. [PMID: 38348814 DOI: 10.1002/chem.202400516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Indexed: 04/24/2024]
Abstract
The field of bioorthogonal chemistry is rapidly growing, presenting successful applications of organic and transition metal-catalysed reactions in cells and living systems (in vivo). The development of such reactions typically proceeds through many iterative steps focused on biocompatibility and fast reaction kinetics to ensure product formation. However, obtaining kinetic data, even under simulated biological (biomimetic) conditions, remains a challenge due to substantial concentrations of salts and biomolecules hampering the use of typically employed solution-phase analytical techniques. In this study, we explored the suitability of gas evolution as a probe to study kinetics under biomimetic conditions. As proof of concept, we show that the progress of two transition metal-catalysed bioorthogonal chemical reactions can be accurately monitored, regardless of the complexity of the medium. As such, we introduce a protocol to gain more insight into the performance of a catalytic system under biomimetic conditions to further progress iterative catalyst development for in vivo applications.
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Affiliation(s)
- Eva J Meeus
- Homogeneous, Supramolecular and Bio-Inspired Catalysis (HomKat) group, Van 't Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
| | - Petrus C M Laan
- Homogeneous, Supramolecular and Bio-Inspired Catalysis (HomKat) group, Van 't Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
| | - Rens Ham
- Homogeneous, Supramolecular and Bio-Inspired Catalysis (HomKat) group, Van 't Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
| | - Bas de Bruin
- Homogeneous, Supramolecular and Bio-Inspired Catalysis (HomKat) group, Van 't Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
| | - Joost N H Reek
- Homogeneous, Supramolecular and Bio-Inspired Catalysis (HomKat) group, Van 't Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
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4
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Ulucan T, Wang J, Onur E, Chen S, Behrens M, Weidenthaler C. Unveiling the Structure-Property Relationship of MgO-Supported Ni Ammonia Decomposition Catalysts from Bulk to Atomic Structure by In Situ/Operando Studies. ACS Catal 2024; 14:2828-2841. [PMID: 38449535 PMCID: PMC10913046 DOI: 10.1021/acscatal.3c05629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 01/21/2024] [Accepted: 01/23/2024] [Indexed: 03/08/2024]
Abstract
Ammonia is currently being studied intensively as a hydrogen carrier in the context of the energy transition. The endothermic decomposition reaction requires the use of suitable catalysts. In this study, transition metal Ni on MgO as a support is investigated with respect to its catalytic properties. The synthesis method and the type of activation process contribute significantly to the catalytic properties. Both methods, coprecipitation (CP) and wet impregnation (WI), lead to the formation of Mg1-xNixO solid solutions as catalyst precursors. X-ray absorption studies reveal that CP leads to a more homogeneous distribution of Ni2+ cations in the solid solution, which is advantageous for a homogeneous distribution of active Ni catalysts on the MgO support. Activation in hydrogen at 900 °C reduces nickel, which migrates to the support surface and forms metal nanoparticles between 6 nm (CP) and 9 nm (WI), as shown by ex situ STEM. Due to the homogeneously distributed Ni2+ cations in the solid solution structure, CP samples are more difficult to activate and require harsher conditions to reduce the Ni. The combination of in situ X-ray diffraction (XRD) and operando total scattering experiments allows a structure-property investigation of the bulk down to the atomic level during the catalytic reaction. Activation in H2 at 900 °C for 2 h leads to the formation of large Ni particles (20-30 nm) for the samples synthesized by the WI method, whereas Ni stays significantly smaller for the CP samples (10-20 nm). Sintering has a negative influence on the catalytic conversion of the WI samples, which is significantly lower compared to the conversion observed for the CP samples. Interestingly, metallic Ni redisperses during cooling and becomes invisible for conventional XRD but can still be detected by total scattering methods. The conditions of activation in NH3 at 650 °C are not suitable to form enough reduced Ni nanoparticles from the solid solution and are, therefore, not a suitable activation procedure. The activity steadily increases in the samples activated at 650 °C in NH3 (Group 1) compared to the samples activated at 650 °C in H2 and then reaches the best activity in the samples activated at 900 °C in H2. Only the combination of complementary in situ and ex situ characterization methods provides enough information to identify important structure-property relationships among these promising ammonia decomposition catalysts.
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Affiliation(s)
- Tolga
H. Ulucan
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, DE-45470 Mülheim an der Ruhr, Germany
| | - Jihao Wang
- Institute
for Inorganic Chemistry Christian-Albrechts-Universität zu
Kiel Max-Eyth-Str. 2, 24118 Kiel, Germany
| | - Ezgi Onur
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, DE-45470 Mülheim an der Ruhr, Germany
| | - Shilong Chen
- Institute
for Inorganic Chemistry Christian-Albrechts-Universität zu
Kiel Max-Eyth-Str. 2, 24118 Kiel, Germany
| | - Malte Behrens
- Institute
for Inorganic Chemistry Christian-Albrechts-Universität zu
Kiel Max-Eyth-Str. 2, 24118 Kiel, Germany
| | - Claudia Weidenthaler
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, DE-45470 Mülheim an der Ruhr, Germany
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Lv Z, He G, Zhang W, Liu J, Lian Z, Yang Y, Yan Z, Xu G, Shan W, Yu Y, He H. Interface sites on vanadia-based catalysts are highly active for NO x removal under realistic conditions. J Environ Sci (China) 2024; 136:523-536. [PMID: 37923461 DOI: 10.1016/j.jes.2022.10.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 09/29/2022] [Accepted: 10/07/2022] [Indexed: 11/07/2023]
Abstract
TiO2-supported V2O5 catalysts are commonly used in NOx reduction with ammonia due to their robust catalytic performance. Over these catalysts, it is generally considered that the active species are mainly derived from the vanadia species rather than the intrinsic structure of V-O-Ti entities, namely the interface sites. To reveal the role of V-O-Ti entities in NH3-SCR, herein, we prepared TiO2/V2O5 catalysts and demonstrated that V-O-Ti entities were more active for NOx reduction under wet conditions than the V sites (V=O) working alone. On the V-O-Ti entities, kinetic measurements and first principles calculations revealed that NH3 activation exhibited a much lower energy barrier than that on V=O sites. Under wet conditions, the V-O-Ti interface significantly inhibited the transformation of V=O to V-OH sites thus benefiting NH3 activation. Under wet conditions, meanwhile, the migration of NH4+ from Ti site neighboring the V-O-Ti interface to Ti site of the V-O-Ti interface was exothermic; thus, V-O-Ti entities together with neighboring Ti sites could serve as channels linking NH3 pool and active centers for activation of NH4+. This finding reveals that the V-O-Ti interface sites on V-based catalysts play a crucial role in NOx removal under realistic conditions, providing a new perspective on NH3-SCR mechanism.
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Affiliation(s)
- Zhihui Lv
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guangzhi He
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wenshuo Zhang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jingjing Liu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhihua Lian
- Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Yang Yang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Zidi Yan
- Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, China
| | - Guangyan Xu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Wenpo Shan
- Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Ningbo Research Center for Urban Environment, Chinese Academy of Sciences, Ningbo 315800, China
| | - Yunbo Yu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China; Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, China.
| | - Hong He
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China; Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.
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6
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Umegaki T, Kojima Y. Thermochemical Properties of Synthesized Urea from Recovered Ammonia and Carbon Dioxide in Well-Ordered Nanospaces of Hollow Silica Spheres. ACS OMEGA 2024; 9:714-718. [PMID: 38222630 PMCID: PMC10785277 DOI: 10.1021/acsomega.3c06534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 12/02/2023] [Accepted: 12/07/2023] [Indexed: 01/16/2024]
Abstract
The present work investigated the thermochemical properties of urea synthesized in well-ordered nanospaces of porous hollow silica spheres' shells from recovered ammonia and carbon dioxide in aqueous solution. Thermochemical behaviors of the urea synthesized in well-ordered nanospaces of the hollow spheres' shells prepared with 1-dodeclyamine were analyzed from the results of thermogravimetric analysis (TGA) and differential thermal analysis (DTA), and endothermic peaks assigned as the phase transition and decomposition were observed at ca. 440 and 514 K, respectively, which were higher than those of pristine urea (405 and 408 K, respectively), probably because of the nanoconfinement effect. The decomposition behavior was also confirmed by the result of diffuse reflectance infrared Fourier transform (DRIFT) spectra of the samples treated at various temperatures up to 573 K, and the decomposition of urea synthesized in the well-ordered nanospaces of the hollow spheres' shells started at 468 K and completed up to 533 K.
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Affiliation(s)
- Tetsuo Umegaki
- Department
of Materials and Applied Chemistry, College of Science and Technology, Nihon University, 1-8-14, Kanda Surugadai, Chiyoda-ku, Tokyo 101-8308, Japan
| | - Yoshiyuki Kojima
- Department
of Materials and Applied Chemistry, College of Science and Technology, Nihon University, 1-8-14, Kanda Surugadai, Chiyoda-ku, Tokyo 101-8308, Japan
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7
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Vice A, Langer N, Reinhart B, Kedem O. Surface-Modified Pd/CeO 2 Single-Atom Catalyst Shows Increased Activity for Suzuki Cross-Coupling. Inorg Chem 2023; 62:21479-21486. [PMID: 38054605 DOI: 10.1021/acs.inorgchem.3c03649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
Single-atom catalysts (SACs) comprise catalytically active atoms dispersed on supports; they combine the high activity and site uniformity of homogeneous catalysts with the ease of separability of heterogeneous catalysts. However, SACs lack fine control over the active site, provided by ligands in homogeneous catalysts. In this work, we demonstrate that modification of the support with an organic monolayer is a viable approach to improving the catalytic performance. The addition of catechol-type monolayers to a Pd/CeO2 SAC increases its catalytic activity for Suzuki cross-coupling, a central reaction in the synthesis of fine chemicals and pharmaceuticals. Kinetic trials reveal that the coating reduces the activation energy from 49 ± 9 to 22 ± 5 kJ/mol and produces a 4-fold rate enhancement at 25 °C, an effect we attribute to π-π interactions between the reactant and the catechol coating. Further development of this approach could vastly increase the utility of SACs in organic synthesis.
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Affiliation(s)
- Audrey Vice
- Department of Chemistry, Marquette University, P.O. Box 1881, Milwaukee, Wisconsin 53201-1881, United States
| | - Nicholas Langer
- Department of Chemistry, Marquette University, P.O. Box 1881, Milwaukee, Wisconsin 53201-1881, United States
| | - Benjamin Reinhart
- X-ray Science Division, Argonne National Laboratory, Argonne, Lemont, Illinois 60439, United States
| | - Ofer Kedem
- Department of Chemistry, Marquette University, P.O. Box 1881, Milwaukee, Wisconsin 53201-1881, United States
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8
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Laan PCM, Bobylev EO, de Zwart FJ, Vleer JA, Troglia A, Bliem R, Rothenberg G, Reek JNH, Yan N. Tailoring Secondary Coordination Sphere Effects in Single-metal-site Catalysts by Surface Immobilization of Supramolecular Cages. Chemistry 2023; 29:e202301901. [PMID: 37874010 DOI: 10.1002/chem.202301901] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Indexed: 10/25/2023]
Abstract
Controlling the coordination sphere of heterogeneous single-metal-site catalysts is a powerful strategy for fine-tuning their catalytic properties but is fairly difficult to achieve. To address this problem, we immobilized supramolecular cages where the primary- and secondary coordination sphere are controlled by ligand design. The kinetics of these catalysts were studied in a model reaction, the hydrolysis of ammonia borane, over a temperature range using fast and precise online measurements generating high-precision Arrhenius plots. The results show how catalytic properties can be enhanced by placing a well-defined reaction pocket around the active site. Our fine-tuning yielded a catalyst with such performance that the reaction kinetics are diffusion-controlled rather than chemically controlled.
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Affiliation(s)
- Petrus C M Laan
- Van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam (The, Netherlands
| | - Eduard O Bobylev
- Van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam (The, Netherlands
| | - Felix J de Zwart
- Van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam (The, Netherlands
| | - Joppe A Vleer
- Van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam (The, Netherlands
| | - Alessandro Troglia
- Advanced Research Center for Nanolithography (ARCNL), Science Park 106, 1098XG, Amsterdam (The, Netherlands
| | - Roland Bliem
- Advanced Research Center for Nanolithography (ARCNL), Science Park 106, 1098XG, Amsterdam (The, Netherlands
| | - Gadi Rothenberg
- Van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam (The, Netherlands
| | - Joost N H Reek
- Van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam (The, Netherlands
| | - Ning Yan
- Van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam (The, Netherlands
- Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan, 430072, China
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9
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Langer N, LeGrand M, Kedem O. Cationic Polymer Coating Increases the Catalytic Activity of Gold Nanoparticles toward Anionic Substrates. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37289992 DOI: 10.1021/acsami.3c04087] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Organic coatings on catalytic metal nanoparticles (NPs) typically hinder their activity due to the blocking of active sites. Therefore, considerable effort is made to remove organic ligands when preparing supported NP catalytic materials. Here, cationic polyelectrolyte coatings are shown to increase the catalytic activity of partially embedded gold nanoislands (Au NIs) toward transfer hydrogenation and oxidation reactions with anionic substrates compared to the activity of identical but uncoated Au NIs. Any potential steric hindrance caused by the coating is countered by a decrease in the activation energy of the reaction by half, resulting in overall enhancement. The direct comparison to identical but uncoated NPs isolates the role of the coating and provides conclusive evidence of enhancement. Our findings show that engineering the microenvironment of heterogeneous catalysts, creating hybrid materials that cooperatively interact with the reactants involved, is a viable and exciting path to improving their performance.
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Affiliation(s)
- Nicholas Langer
- Department of Chemistry, Marquette University, P.O. Box 1881, Milwaukee, Wisconsin 53201-1881, United States
| | - Mason LeGrand
- Department of Chemistry, Marquette University, P.O. Box 1881, Milwaukee, Wisconsin 53201-1881, United States
| | - Ofer Kedem
- Department of Chemistry, Marquette University, P.O. Box 1881, Milwaukee, Wisconsin 53201-1881, United States
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10
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CO2 Methanation over Nickel Catalysts: Support Effects Investigated through Specific Activity and Operando IR Spectroscopy Measurements. Catalysts 2023. [DOI: 10.3390/catal13020448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023] Open
Abstract
Renewed interest in CO2 methanation is due to its role within the framework of the Power-to-Methane processes. While the use of nickel-based catalysts for CO2 methanation is well stablished, the support is being subjected to thorough research due to its complex effects. The objective of this work was the study of the influence of the support with a series of catalysts supported on alumina, ceria, ceria–zirconia, and titania. Catalysts’ performance has been kinetically and spectroscopically evaluated over a wide range of temperatures (150–500 °C). The main results have shown remarkable differences among the catalysts as concerns Ni dispersion, metallic precursor reducibility, basic properties, and catalytic activity. Operando infrared spectroscopy measurements have evidenced the presence of almost the same type of adsorbed species during the course of the reaction, but with different relative intensities. The results indicate that using as support of Ni a reducible metal oxide that is capable of developing the basicity associated with medium-strength basic sites and a suitable balance between metallic sites and centers linked to the support leads to high CO2 methanation activity. In addition, the results obtained by operando FTIR spectroscopy suggest that CO2 methanation follows the formate pathway over the catalysts under consideration.
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11
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Umegaki T, Kojima Y. Conversion of Recovered Ammonia and Carbon Dioxide into Urea in the Presence of Catalytically Active Copper Species in Nanospaces of Porous Silica Hollow Spheres. ACS APPLIED MATERIALS & INTERFACES 2023; 15:5109-5117. [PMID: 36668975 DOI: 10.1021/acsami.2c17560] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The present study firstly reported porous silica hollow spheres as a host material for recovery of ammonia and carbon dioxide and conversion of the compounds into urea. These compounds were effectively introduced into the hollow spheres from an aqueous solution including ammonium and carbonate ions accompanied with catalytically active copper ions from the analyses of diffuse reflectance infrared Fourier transform (DRIFT) spectra and diffusion reflectance ultraviolet-visible and near-infrared (DR UV-vis-NIR) spectra. The ammonium and carbonate ions were converted into urea in the hollow spheres at 323 K under 0.5 MPa of argon atmosphere from the results of the DRIFT spectra. From the results of nitrogen sorption isotherms and X-ray photoelectron spectra (XPS) spectra, the amount of the generated urea depended on the amount of the introduced ammonium ions and the size distribution of the nanospaces in the hollow spheres. Urea was highly generated in the hollow spheres with a high amount of ammonium ions and well-ordered nanospaces from the reactants at high density.
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Affiliation(s)
- Tetsuo Umegaki
- Department of Materials and Applied Chemistry, College of Science and Technology, College of Science and Technology, Nihon University, 1-8-14, Kanda Surugadai, Chiyoda-ku, Tokyo101-8308, Japan
| | - Yoshiyuki Kojima
- Department of Materials and Applied Chemistry, College of Science and Technology, College of Science and Technology, Nihon University, 1-8-14, Kanda Surugadai, Chiyoda-ku, Tokyo101-8308, Japan
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12
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Mekkering MJ, Biemolt J, de Graaf J, Lin YA, van Leest NP, Troglia A, Bliem R, de Bruin B, Rothenberg G, Yan N. Dry reforming of methane over single-atom Rh/Al 2O 3 catalysts prepared by exsolution. Catal Sci Technol 2023; 13:2255-2260. [PMID: 37025647 PMCID: PMC10069472 DOI: 10.1039/d2cy02126a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Accepted: 02/18/2023] [Indexed: 03/17/2023]
Abstract
Single-atom catalysts often show exceptionally high performance per metal loading.
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Affiliation(s)
- Martijn J. Mekkering
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1090 GD Amsterdam, The Netherlands
| | - Jasper Biemolt
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1090 GD Amsterdam, The Netherlands
| | - Jeen de Graaf
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1090 GD Amsterdam, The Netherlands
| | - Yi-An Lin
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1090 GD Amsterdam, The Netherlands
| | - Nicolaas P. van Leest
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1090 GD Amsterdam, The Netherlands
| | - Alessandro Troglia
- Advanced Research Center for Nanolithography, Science Park 106, 1098 XG Amsterdam, The Netherlands
| | - Roland Bliem
- Advanced Research Center for Nanolithography, Science Park 106, 1098 XG Amsterdam, The Netherlands
- Van der Waals–Zeeman Institute, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Bas de Bruin
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1090 GD Amsterdam, The Netherlands
| | - Gadi Rothenberg
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1090 GD Amsterdam, The Netherlands
| | - Ning Yan
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1090 GD Amsterdam, The Netherlands
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13
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Amin I, Brekel HVD, Nemani K, Batyrev E, de Vooys A, van der Weijde H, Anasori B, Shiju NR. Ti 3C 2T x MXene Polymer Composites for Anticorrosion: An Overview and Perspective. ACS APPLIED MATERIALS & INTERFACES 2022; 14:43749-43758. [PMID: 36121119 PMCID: PMC9523612 DOI: 10.1021/acsami.2c11953] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 08/29/2022] [Indexed: 05/25/2023]
Abstract
As the most studied two-dimensional (2D) material from the MXene family, Ti3C2Tx has constantly gained interest from academia and industry. Ti3C2Tx MXene has the highest electrical conductivity (up to 24,000 S cm-1) and one of the highest stiffness values with a Young's modulus of ∼ 334 GPa among water-dispersible conductive 2D materials. The negative surface charge of MXene helps to disperse it well in aqueous and other polar solvents. This solubility across a wide range of solvents, excellent interface interaction, tunable surface functionality, and stability with other organic/polymeric materials combined with the layered structure of Ti3C2Tx MXene make it a promising material for anticorrosion coatings. While there are many reviews on Ti3C2Tx MXene polymer composites for catalysis, flexible electronics, and energy storage, to our knowledge, no review has been published yet on MXenes' anticorrosion applications. In this brief report, we summarize the current progress and the development of Ti3C2Tx polymer composites for anticorrosion. We also provide an outlook and discussion on possible ways to improve the exploitation of Ti3C2Tx polymer composites as anticorrosive materials. Finally, we provide a perspective beyond Ti3C2Tx MXene composition for the development of future anticorrosion coatings.
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Affiliation(s)
- Ihsan Amin
- Van’t
Hoff Institute for Molecular Sciences, University
of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Hidde van den Brekel
- Van’t
Hoff Institute for Molecular Sciences, University
of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Kartik Nemani
- Department
of Mechanical and Energy Engineering, Purdue School of Engineering
and Technology and Integrated Nanosystems Development Institute, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202, United States
| | - Erdni Batyrev
- Tata
Steel Research & Development, P.O. Box 10.000, 1970CA IJmuiden, The Netherlands
| | - Arnoud de Vooys
- Tata
Steel Research & Development, P.O. Box 10.000, 1970CA IJmuiden, The Netherlands
| | - Hans van der Weijde
- Tata
Steel Research & Development, P.O. Box 10.000, 1970CA IJmuiden, The Netherlands
| | - Babak Anasori
- Department
of Mechanical and Energy Engineering, Purdue School of Engineering
and Technology and Integrated Nanosystems Development Institute, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202, United States
| | - N. Raveendran Shiju
- Van’t
Hoff Institute for Molecular Sciences, University
of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
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14
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Weidenthaler C, Schmidt W, Leiting S, Ternieden J, Kostis A, Ulucan TH, Budiyanto E. In‐situ Investigations of Co@Al2O3 Ammonia Decomposition Catalysts: The Interaction between Support and Catalyst. ChemCatChem 2022. [DOI: 10.1002/cctc.202200688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Claudia Weidenthaler
- Max-Planck-Institut für Kohlenforschung Heterogeneous Catalysis Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr GERMANY
| | - Wolfgang Schmidt
- Max-Planck-Institut für Kohlenforschung: Max-Planck-Institut fur Kohlenforschung Heterogeneous Catalysis GERMANY
| | - Sebastian Leiting
- Max-Planck-Institut für Kohlenforschung: Max-Planck-Institut fur Kohlenforschung Heterogeneous Catalysis GERMANY
| | - Jan Ternieden
- Max-Planck-Institut für Kohlenforschung: Max-Planck-Institut fur Kohlenforschung Heterogeneous Catalysis GERMANY
| | - Alexander Kostis
- Max-Planck-Institut für Kohlenforschung: Max-Planck-Institut fur Kohlenforschung Heterogeneous Catalysis GERMANY
| | - Tolga Han Ulucan
- Max-Planck-Institut für Kohlenforschung: Max-Planck-Institut fur Kohlenforschung Heterogeneous Catalysis GERMANY
| | - Eko Budiyanto
- Max-Planck-Institut für Kohlenforschung: Max-Planck-Institut fur Kohlenforschung Heter GERMANY
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15
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Zakem G, Ro I, Finzel J, Christopher P. Support functionalization as an approach for modifying activation entropies of catalytic reactions on atomically dispersed metal sites. J Catal 2021. [DOI: 10.1016/j.jcat.2021.07.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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16
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Jenkins AH, Medlin JW. Controlling Heterogeneous Catalysis with Organic Monolayers on Metal Oxides. Acc Chem Res 2021; 54:4080-4090. [PMID: 34644060 DOI: 10.1021/acs.accounts.1c00469] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
ConspectusA key theme of heterogeneous catalysis research is achieving control of the environment surrounding the active site to precisely steer the reactivity toward desired reaction products. One method toward this goal has been the use of organic ligands or self-assembled monolayers (SAMs) on metal nanoparticles. Metal-bound SAMs are typically employed to improve catalyst selectivity but often decrease the reaction rate as a result of site blocking from the ligands. Recently, the use of metal oxide-bound organic modifiers such as organophosphonic acid (PA) SAMs has shown promise as an additional method for tuning reactions on metal oxide surfaces as well as modifying oxide-supported metal catalysts. In this Account, we summarize recent approaches to enhance catalyst performance with oxide-bound monolayers. These approaches include (1) modification of metal oxide catalysts to tune surface reactions, (2) formation of SAMs on the oxide component of supported metal catalysts to modify sites at the metal-support interface, and (3) enhancement of catalyst performance (e.g., stability) through modification of sites remote from the active sites.Both the headgroups and organic tail groups of PA SAMs or other ligands can influence reactions on metal oxide surfaces. Binding of the headgroup can selectively poison certain active sites, altering the selectivity in a manner analogous to metal-bound ligands (at the expense of active site quantity). Moreover, tail groups can be functionalized to interact favorably with reactants and intermediates, for instance through dipole-dipole interactions. On supported metal catalysts like Pt/Al2O3, PA SAMs can selectively form on the oxide support. This selective deposition allows for modification of the metal-support interface with minimal blockage of metal sites. PA headgroups were shown to provide tunable acid sites at the interface, dramatically improving hydrodeoxygenation rates of various alcohols. Additionally, organic tail functionality was used to activate or stabilize specific reactants at the interface, such as with the use of amine-functionalized PAs to stabilize chemisorption of CO2 during the reverse water gas shift reaction. PAs have also been found to affect the electronic properties of bulk metal sites through long-range electron withdrawal via the oxide, providing an additional avenue to tune catalytic behavior. Finally, organic modifiers were shown to enhance catalytic performance without directly modifying the active site. For instance, in biphasic liquid environments the modification of catalyst particles with hydrophobic or hydrophilic SAMs shifts the selectivity of multipath reactions on the basis of the hydrophobicities of different intermediates and products. As another "long-range" effect, the deposition of ligands on oxide supports improved catalyst stability through both improved resistance to sintering and suppression of active site poisoning. The recent contributions discussed in this Account demonstrate the versatility and significant potential for the approach of modifying catalysts with oxide-bound organic monolayers.
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Affiliation(s)
- Alexander H. Jenkins
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80303, United States
| | - J. Will Medlin
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80303, United States
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17
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Slot TK, Oulego P, Sofer Z, Bai Y, Rothenberg G, Raveendran Shiju N. Ruthenium on Alkali‐Exfoliated Ti
3
(Al
0.8
Sn
0.2
)C
2
MAX Phase Catalyses Reduction of 4‐Nitroaniline with Ammonia Borane. ChemCatChem 2021. [DOI: 10.1002/cctc.202100158] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Thierry K. Slot
- Van't Hoff Institute for Molecular Sciences University of Amsterdam Science Park 904 1098 XH Amsterdam The Netherlands
| | - Paula Oulego
- Department of Chemical and Environmental Engineering University of Oviedo c/Julián Clavería 8 33006 Oviedo Asturias Spain
| | - Zdeněk Sofer
- Department of Inorganic Chemistry University of Chemistry and Technology Prague Technická 5 166 28 Prague 6 Czech Republic
| | - Yuelei Bai
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and Structures Harbin Institute of Technology Harbin 150080 P. R. China
| | - Gadi Rothenberg
- Van't Hoff Institute for Molecular Sciences University of Amsterdam Science Park 904 1098 XH Amsterdam The Netherlands
| | - N. Raveendran Shiju
- Van't Hoff Institute for Molecular Sciences University of Amsterdam Science Park 904 1098 XH Amsterdam The Netherlands
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18
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Šimonová Baranyaiová T, Mészáros R, Sebechlebská T, Bujdák J. Non-Arrhenius kinetics and slowed-diffusion mechanism of molecular aggregation of a rhodamine dye on colloidal particles. Phys Chem Chem Phys 2021; 23:17177-17185. [PMID: 34346441 DOI: 10.1039/d1cp02762j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The non-covalent association is important for many fields of science, including processes in living systems. This work elucidates the mechanism of rhodamine 123 molecular aggregation in dispersions of a layered silicate and explains the mystery of the slow kinetics of this process. Chemometric analysis of thousands of spectra recorded by stopped-flow visible spectroscopy identified two parallel diffusion processes described by a two-phase exponential function. The slow and fast processes followed the super-Arrhenius kinetics and were assigned to lateral (surface) diffusion and inter-particle diffusion of dye cations, respectively. This work, supported by a large amount of data and their in-depth analysis, provides the first evidence of how these processes coexist together and provides quantitative analysis of their dependence on the reaction conditions. The implications of this work can be crucial for understanding the mechanism of the non-covalent association of adsorbed molecules in nature.
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Affiliation(s)
- Tímea Šimonová Baranyaiová
- Department of Hydrosilicates, Institute of Inorganic Chemistry, Slovak Academy of Sciences, 845 36 Bratislava, Slovakia.
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19
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Özkar S. A review on platinum(0) nanocatalysts for hydrogen generation from the hydrolysis of ammonia borane. Dalton Trans 2021; 50:12349-12364. [PMID: 34259283 DOI: 10.1039/d1dt01709h] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review reports a survey on the progress in developing highly efficient platinum nanocatalysts for the hydrolytic dehydrogenation of ammonia borane (AB). After a short prelude emphasizing the importance of increasing the atom efficiency of high cost, precious platinum nanoparticles (NPs) which are known to be one of the highest activity catalysts for hydrogen generation from the hydrolysis of AB, this article reviews all the available reports on the use of platinum-based catalysts for this hydrolysis reaction covering (i) early tested platinum catalysts, (ii) platinum(0) NPs supported on oxides, (iii) platinum(0) NPs supported on carbonaceous materials, (iv) supported platinum single-atom catalysts, (v) bimetallic- and (vi) multimetallic-platinum NP nanocatalysts, and (vii) magnetically separable platinum-based catalysts. All the reported results are tabulated along with the important parameters used in the platinum-catalyzed hydrolysis of AB. In the section "Concluding remarks and a look towards the future" a discussion is devoted to the approaches for making high cost, precious platinum catalysts as efficient as possible, ultimately lowering the cost, including the suggestions for the future research in this field.
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Affiliation(s)
- Saim Özkar
- Department of Chemistry, Middle East Technical University, Ankara, Turkey.
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