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Bellomi S, Barlocco I, Tumiati S, Fumagalli P, Dimitratos N, Roldan A, Villa A. Effects of oxygen functionalities on hydrous hydrazine decomposition over carbonaceous materials. Dalton Trans 2023; 52:15871-15877. [PMID: 37830287 DOI: 10.1039/d3dt02310a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2023]
Abstract
Metal-free heterogeneous catalysis is promising in the context of H2 generation. Therefore, establishing structure-activity relationships is a crucial issue to improve the development of more efficient catalysts. Herein, to evaluate the reactivity of the oxygen functionalities in carbonaceous materials, commercial functionalized pyrolytically stripped carbon nanofibers (CNFs) were used as catalysts in the liquid-phase hydrous hydrazine decomposition process and its activity was compared to that of a pristine CNF material. Different oxygenated groups were inserted by treating CNFs with hydrogen peroxide for 1 h (O1-H2O2) and HNO3 for 1 h (O1-HNO3) and 6 h (O6-HNO3). An increase in activity was observed as a function of the oxidizing agent strength (HNO3 > H2O2) and the functionalization time (6 h > 1 h). A thorough characterization of the catalysts demonstrated that the activity could be directly correlated with the oxygen content (O6-HNO3 > O1-HNO3 > O1-H2O2 > CNFs) and pointed out the active sites for the reaction at carbon-oxygen double bond groups (CO and COOH). Systematic DFT calculations supported rationalization of the experimental kinetic trends with respect to each oxygen group (CO, C-O-C, C-OH and COOH).
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Affiliation(s)
- Silvio Bellomi
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, I-20133, Milano, Italy.
| | - Ilaria Barlocco
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, I-20133, Milano, Italy.
| | - Simone Tumiati
- Dipartimento di Scienze della Terra Ardito Desio, Università degli Studi di Milano, via Mangiagalli 34, Milano I-20133, Italy
| | - Patrizia Fumagalli
- Dipartimento di Scienze della Terra Ardito Desio, Università degli Studi di Milano, via Mangiagalli 34, Milano I-20133, Italy
| | - Nikolaos Dimitratos
- Dipartimento di Chimica Industriale "Toso Montanari", Alma Mater Studiorum Università di Bologna, Viale Risorgimento 4, Bologna 40126, Italy
- Center for Chemical Catalysis-C3, Alma Mater Studiorum Università di Bologna, Viale Risorgimento 4, Bologna 40136, Italy
| | - Alberto Roldan
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, CF10 3AT, Cardiff, UK.
| | - Alberto Villa
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, I-20133, Milano, Italy.
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Zhou J, Yang P, Kots PA, Cohen M, Chen Y, Quinn CM, de Mello MD, Anibal Boscoboinik J, Shaw WJ, Caratzoulas S, Zheng W, Vlachos DG. Tuning the reactivity of carbon surfaces with oxygen-containing functional groups. Nat Commun 2023; 14:2293. [PMID: 37085515 PMCID: PMC10121666 DOI: 10.1038/s41467-023-37962-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 04/07/2023] [Indexed: 04/23/2023] Open
Abstract
Oxygen-containing carbons are promising supports and metal-free catalysts for many reactions. However, distinguishing the role of various oxygen functional groups and quantifying and tuning each functionality is still difficult. Here we investigate the role of Brønsted acidic oxygen-containing functional groups by synthesizing a diverse library of materials. By combining acid-catalyzed elimination probe chemistry, comprehensive surface characterizations, 15N isotopically labeled acetonitrile adsorption coupled with magic-angle spinning nuclear magnetic resonance, machine learning, and density-functional theory calculations, we demonstrate that phenolic is the main acid site in gas-phase chemistries and unexpectedly carboxylic groups are much less acidic than phenolic groups in the graphitized mesoporous carbon due to electron density delocalization induced by the aromatic rings of graphitic carbon. The methodology can identify acidic sites in oxygenated carbon materials in solid acid catalyst-driven chemistry.
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Affiliation(s)
- Jiahua Zhou
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE, 19716, USA
- Catalysis Center for Energy Innovation, University of Delaware, Newark, DE, 19716, USA
| | - Piaoping Yang
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE, 19716, USA
- Catalysis Center for Energy Innovation, University of Delaware, Newark, DE, 19716, USA
| | - Pavel A Kots
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE, 19716, USA
| | - Maximilian Cohen
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE, 19716, USA
| | - Ying Chen
- Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Caitlin M Quinn
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE, 19716, USA
| | - Matheus Dorneles de Mello
- Catalysis Center for Energy Innovation, University of Delaware, Newark, DE, 19716, USA
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - J Anibal Boscoboinik
- Catalysis Center for Energy Innovation, University of Delaware, Newark, DE, 19716, USA
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Wendy J Shaw
- Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Stavros Caratzoulas
- Catalysis Center for Energy Innovation, University of Delaware, Newark, DE, 19716, USA
| | - Weiqing Zheng
- Catalysis Center for Energy Innovation, University of Delaware, Newark, DE, 19716, USA.
| | - Dionisios G Vlachos
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE, 19716, USA.
- Catalysis Center for Energy Innovation, University of Delaware, Newark, DE, 19716, USA.
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Bellomi S, Barlocco I, Chen X, Delgado JJ, Arrigo R, Dimitratos N, Roldan A, Villa A. Enhanced stability of sub-nanometric iridium decorated graphitic carbon nitride for H 2 production upon hydrous hydrazine decomposition. Phys Chem Chem Phys 2023; 25:1081-1095. [PMID: 36520142 DOI: 10.1039/d2cp04387d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Stabilizing metal nanoparticles is vital for large scale implementations of supported metal catalysts, particularly for a sustainable transition to clean energy, e.g., H2 production. In this work, iridium sub-nanometric particles were deposited on commercial graphite and on graphitic carbon nitride by a wet impregnation method to investigate the metal-support interaction during the hydrous hydrazine decomposition reaction. To establish a structure-activity relationship, samples were characterized by transmission electron microscopy and X-ray photoelectron spectroscopy. The catalytic performance of the synthesized materials was evaluated under mild reaction conditions, i.e. 323 K and ambient pressure. The results showed that graphitic carbon nitride (GCN) enhances the stability of Ir nanoparticles compared to graphite, while maintaining remarkable activity and selectivity. Simulation techniques including Genetic Algorithm geometry screening and electronic structure analyses were employed to provide a valuable atomic level understanding of the metal-support interactions. N anchoring sites of GCN were found to minimise the thermodynamic driving force of coalescence, thus improving the catalyst stability, as well as to lead charge redistributions in the cluster improving the resistance to poisoning by decomposition intermediates.
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Affiliation(s)
- Silvio Bellomi
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, I-20133 Milano, Italy.
| | - Ilaria Barlocco
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, I-20133 Milano, Italy.
| | - Xiaowei Chen
- Departamento de Ciencia de los Materiales, Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, Campus Río San Pedro, Puerto Real (Cádiz) E-11510, Spain
| | - Juan J Delgado
- Departamento de Ciencia de los Materiales, Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, Campus Río San Pedro, Puerto Real (Cádiz) E-11510, Spain
| | - Rosa Arrigo
- School of Science, Engineering and Environment, University of Salford, M5 4WT, Manchester, UK
| | - Nikolaos Dimitratos
- Dipartimento di Chimica Industriale "Toso Montanari", Alma Mater Studiorum Università di Bologna, Viale Risorgimento 4, Bologna 40126, Italy.,Center for Chemical Catalysis-C3, Alma Mater Studiorum Università di Bologna, Viale Risorgimento 4, Bologna 40136, Italy
| | - Alberto Roldan
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, CF10 3AT, Cardiff, UK.
| | - Alberto Villa
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, I-20133 Milano, Italy.
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Chauhan A, Banerjee A, Kar AK, Srivastava R. Metal-Free N-Doped Carbon Catalyst Derived from Chitosan for Aqueous Formic Acid-Mediated Selective Reductive Formylation of Quinoline and Nitroarenes. CHEMSUSCHEM 2022; 15:e202201560. [PMID: 36134620 DOI: 10.1002/cssc.202201560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 09/19/2022] [Indexed: 06/16/2023]
Abstract
A chitosan-derived metal-free N-doped carbon catalyst was synthesized and investigated for selective reductive formylation of quinoline to N-formyl-tetrahydroquinoline and nitroarenes to N-formyl anilides via aqueous formic acid (FA)-mediated catalytic transformation. FA dissociated on the catalyst surface and acted as a hydrogenating and formylating source for selective N-formylation of N-heteroarenes. The carbonized catalyst prepared at 700 °C offered the best activity. A 92 % yield of N-formyl-tetrahydroquinoline after 14 h and >99 % yield for N-formyl anilide after 12 h at 160 °C were obtained. The excellent catalytic activity was correlated with the type of "N" species and the basicity of the catalyst. Density functional theory calculations revealed that a water-assisted FA decomposition pathway (deprotonation and dehydroxylation) generated the surface adsorbed -H and -HCOO species, required for the formation of N-formylated products. In addition, the selective formation of N-formyl-tetrahydroquinoline and N-formyl anilides was explained by a comprehensive reaction energetics analysis.
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Affiliation(s)
- Arzoo Chauhan
- Catalysis Research Laboratory, Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, 140001, India
| | - Arghya Banerjee
- Department of Chemical Engineering, Indian Institute of Technology Ropar, Rupnagar, 140001, India
| | - Ashish Kumar Kar
- Catalysis Research Laboratory, Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, 140001, India
| | - Rajendra Srivastava
- Catalysis Research Laboratory, Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, 140001, India
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Zhao X, Wang Y, Shang M, Hao Y, Wang J, Meng T, Li Q, Zhang L, Feng C, Niu J, Cui P, Wang C. Mechanism difference between nanoparticles and single-atom sites on aqueous formic acid dehydrogenation over coblat catalyst. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Highly Active/Selective Synergistic Catalysis of Bimetallic Pd/Co Catalyst Anchored on Air-Mediated Nanocarbons for H2 Production by Formic Acid Dehydrogenation. Catal Letters 2022. [DOI: 10.1007/s10562-022-04078-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Barlocco I, Bellomi S, Tumiati S, Fumagalli P, Dimitratos N, Roldan A, Villa A. Selective decomposition of hydrazine over metal free carbonaceous materials. Phys Chem Chem Phys 2022; 24:3017-3029. [PMID: 35037926 DOI: 10.1039/d1cp05179b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein we report a combined experimental and computational investigation unravelling the hydrazine hydrate decomposition reaction on metal-free catalysts. The study focuses on commercial graphite and two different carbon nanofibers, pyrolytically stripped (CNF-PS) and high heat-treated (CNF-HHT), respectively, treated at 700 and 3000 °C to increase their intrinsic defects. Raman spectroscopy demonstrated a correlation between the initial catalytic activity and the intrinsic defectiveness of carbonaceous materials. CNF-PS with higher defectivity (ID/IG = 1.54) was found to be the best performing metal-free catalyst, showing a hydrazine conversion of 94% after 6 hours of reaction and a selectivity to H2 of 89%. In addition, to unveil the role of NaOH, CNF-PS was also tested in the absence of alkaline solution, showing a decrease in the reaction rate and selectivity to H2. Density functional theory (DFT) demonstrated that the single vacancies (SV) present on the graphitic layer are the only active sites promoting hydrazine decomposition, whereas other defects such as double vacancy (DV) and Stone-Wales (SW) defects are unable to adsorb hydrazine fragments. Two symmetrical and one asymmetrical dehydrogenation pathways were found, in addition to an incomplete decomposition pathway forming N2 and NH3. On the most stable hydrogen production pathway, the effect of the alkaline medium was elucidated through calculations concerning the diffusion and recombination of atomic hydrogen. Indeed, the presence of NaOH helps the extraction of H species without additional energetic barriers, as opposed to the calculations performed in a polarizable continuum medium. Considering the initial hydrazine dissociative adsorption, the first step of the dehydrogenation pathway is more favourable than the scission of the N-N bond, which leads to NH3 as the product. This first reaction step is crucial to define the reaction mechanisms and the computational results are in agreement with the experimental ones. Moreover, comparing two different hydrogen production pathways (with and without diffusion and recombination), we confirmed that the presence of sodium hydroxide in the experimental reaction environment can modify the energy gap between the two pathways, leading to an increased reaction rate and selectivity to H2.
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Affiliation(s)
- Ilaria Barlocco
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, Milano I-20133, Italy.
| | - Silvio Bellomi
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, Milano I-20133, Italy.
| | - Simone Tumiati
- Dipartimento di Scienze della Terra Ardito Desio, Università degli Studi di Milano, via Mangiagalli 34, Milano I-20133, Italy
| | - Patrizia Fumagalli
- Dipartimento di Scienze della Terra Ardito Desio, Università degli Studi di Milano, via Mangiagalli 34, Milano I-20133, Italy
| | - Nikolaos Dimitratos
- Dipartimento di Chimica Industriale e dei Materiali, ALMA MATER STUDIORUM Università di Bologna, Viale Risorgimento 4, Bologna 40136, Italy
| | - Alberto Roldan
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, CF10 3AT, Cardiff, UK.
| | - Alberto Villa
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, Milano I-20133, Italy.
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Enhancing activity, selectivity and stability of palladium catalysts in formic acid decomposition: Effect of support functionalization. Catal Today 2021. [DOI: 10.1016/j.cattod.2021.07.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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9
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Barlocco I, Capelli S, Lu X, Bellomi S, Huang X, Wang D, Prati L, Dimitratos N, Roldan A, Villa A. Disclosing the Role of Gold on Palladium – Gold Alloyed Supported Catalysts in Formic Acid Decomposition. ChemCatChem 2021. [DOI: 10.1002/cctc.202100886] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ilaria Barlocco
- Dipartimento di Chimica Università degli Studi di Milano Via Golgi 19 20133 Milano Italy
| | - Sofia Capelli
- Dipartimento di Chimica Università degli Studi di Milano Via Golgi 19 20133 Milano Italy
| | - Xiuyuan Lu
- Cardiff Catalysis Institute School of Chemistry Cardiff University Main Building, Park Place CF10 3AT Cardiff United Kingdom
| | - Silvio Bellomi
- Dipartimento di Chimica Università degli Studi di Milano Via Golgi 19 20133 Milano Italy
| | - Xiaohui Huang
- Institute of Nanotechnology Karlsruhe Institute of Technology Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - Di Wang
- Institute of Nanotechnology Karlsruhe Institute of Technology Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
- Karlsruhe Nano Micro Facility (KNMF) Karlsruhe Institute of Technology Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - Laura Prati
- Dipartimento di Chimica Università degli Studi di Milano Via Golgi 19 20133 Milano Italy
| | - Nikolaos Dimitratos
- Dipartimento di Chimica Industriale e dei Materiali ALMA MATER STUDIORUM Università di Bologna Viale Risorgimento 4 40136 Bologna Italy
| | - Alberto Roldan
- Cardiff Catalysis Institute School of Chemistry Cardiff University Main Building, Park Place CF10 3AT Cardiff United Kingdom
| | - Alberto Villa
- Dipartimento di Chimica Università degli Studi di Milano Via Golgi 19 20133 Milano Italy
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