51
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Borfecchia E, Beato P, Svelle S, Olsbye U, Lamberti C, Bordiga S. Cu-CHA – a model system for applied selective redox catalysis. Chem Soc Rev 2018; 47:8097-8133. [DOI: 10.1039/c8cs00373d] [Citation(s) in RCA: 160] [Impact Index Per Article: 26.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We review the structural chemistry and reactivity of copper-exchanged molecular sieves with chabazite (CHA) topology, as an industrially applied catalyst in ammonia mediated reduction of harmful nitrogen oxides (NH3-SCR) and as a general model system for red-ox active materials (also the recent results in the direct conversion of methane to methanol are considered).
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Affiliation(s)
| | | | - Stian Svelle
- Center for Materials Science and Nanotechnology (SMN)
- Department of Chemistry
- University of Oslo
- N-0315 Oslo
- Norway
| | - Unni Olsbye
- Center for Materials Science and Nanotechnology (SMN)
- Department of Chemistry
- University of Oslo
- N-0315 Oslo
- Norway
| | - Carlo Lamberti
- The Smart Materials Research Institute
- Southern Federal University
- 344090 Rostov-on-Don
- Russia
- Department of Physics
| | - Silvia Bordiga
- Center for Materials Science and Nanotechnology (SMN)
- Department of Chemistry
- University of Oslo
- N-0315 Oslo
- Norway
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52
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Snyder BER, Bols ML, Schoonheydt RA, Sels BF, Solomon EI. Iron and Copper Active Sites in Zeolites and Their Correlation to Metalloenzymes. Chem Rev 2017; 118:2718-2768. [DOI: 10.1021/acs.chemrev.7b00344] [Citation(s) in RCA: 193] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Benjamin E. R. Snyder
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Max L. Bols
- Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, KU Leuven—University of Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Robert A. Schoonheydt
- Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, KU Leuven—University of Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Bert F. Sels
- Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, KU Leuven—University of Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Edward I. Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
- Photon Science, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, United States
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53
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Hallaert SD, Bols ML, Vanelderen P, Schoonheydt RA, Sels BF, Pierloot K. Identification of α-Fe in High-Silica Zeolites on the Basis of ab Initio Electronic Structure Calculations. Inorg Chem 2017; 56:10681-10690. [DOI: 10.1021/acs.inorgchem.7b01653] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Simon D. Hallaert
- Department
of Chemistry and ‡Centre for Surface Chemistry and Catalysis, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Max L. Bols
- Department
of Chemistry and ‡Centre for Surface Chemistry and Catalysis, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Pieter Vanelderen
- Department
of Chemistry and ‡Centre for Surface Chemistry and Catalysis, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Robert A. Schoonheydt
- Department
of Chemistry and ‡Centre for Surface Chemistry and Catalysis, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Bert F. Sels
- Department
of Chemistry and ‡Centre for Surface Chemistry and Catalysis, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Kristine Pierloot
- Department
of Chemistry and ‡Centre for Surface Chemistry and Catalysis, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
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54
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A DFT study on the mechanism of NO decomposition catalyzed by short-distance Cu(I) pairs in Cu-ZSM-5. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.mcat.2017.01.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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55
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Mahyuddin MH, Staykov A, Shiota Y, Miyanishi M, Yoshizawa K. Roles of Zeolite Confinement and Cu–O–Cu Angle on the Direct Conversion of Methane to Methanol by [Cu2(μ-O)]2+-Exchanged AEI, CHA, AFX, and MFI Zeolites. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00588] [Citation(s) in RCA: 101] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- M. Haris Mahyuddin
- Institute
for Materials Chemistry and Engineering and IRCCS, Kyushu University, Fukuoka 819-0395, Japan
- Department
of Physics-Energy Engineering, Surya University, Tangerang 15810, Indonesia
| | - Aleksandar Staykov
- International
Institute for Carbon-Neutral Energy Research, Kyushu University, Fukuoka 819-0395, Japan
| | - Yoshihito Shiota
- Institute
for Materials Chemistry and Engineering and IRCCS, Kyushu University, Fukuoka 819-0395, Japan
| | - Mayuko Miyanishi
- Institute
for Materials Chemistry and Engineering and IRCCS, Kyushu University, Fukuoka 819-0395, Japan
| | - Kazunari Yoshizawa
- Institute
for Materials Chemistry and Engineering and IRCCS, Kyushu University, Fukuoka 819-0395, Japan
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56
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Zhang L, Zhang Z, He X, Zhang F, Zhang Z. Regulation of the products of styrene oxidation. Chem Eng Res Des 2017. [DOI: 10.1016/j.cherd.2017.02.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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57
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Wang VCC, Maji S, Chen PPY, Lee HK, Yu SSF, Chan SI. Alkane Oxidation: Methane Monooxygenases, Related Enzymes, and Their Biomimetics. Chem Rev 2017; 117:8574-8621. [PMID: 28206744 DOI: 10.1021/acs.chemrev.6b00624] [Citation(s) in RCA: 249] [Impact Index Per Article: 35.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Methane monooxygenases (MMOs) mediate the facile conversion of methane into methanol in methanotrophic bacteria with high efficiency under ambient conditions. Because the selective oxidation of methane is extremely challenging, there is considerable interest in understanding how these enzymes carry out this difficult chemistry. The impetus of these efforts is to learn from the microbes to develop a biomimetic catalyst to accomplish the same chemical transformation. Here, we review the progress made over the past two to three decades toward delineating the structures and functions of the catalytic sites in two MMOs: soluble methane monooxygenase (sMMO) and particulate methane monooxygenase (pMMO). sMMO is a water-soluble three-component protein complex consisting of a hydroxylase with a nonheme diiron catalytic site; pMMO is a membrane-bound metalloenzyme with a unique tricopper cluster as the site of hydroxylation. The metal cluster in each of these MMOs harnesses O2 to functionalize the C-H bond using different chemistry. We highlight some of the common basic principles that they share. Finally, the development of functional models of the catalytic sites of MMOs is described. These efforts have culminated in the first successful biomimetic catalyst capable of efficient methane oxidation without overoxidation at room temperature.
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Affiliation(s)
- Vincent C-C Wang
- Institute of Chemistry, Academia Sinica , 128, Section 2, Academia Road, Nankang, Taipei 11529, Taiwan
| | - Suman Maji
- School of Chemical Engineering and Physical Sciences, Lovely Professional University , Jalandhar-Delhi G. T. Road (NH-1), Phagwara, Punjab India 144411
| | - Peter P-Y Chen
- Department of Chemistry, National Chung Hsing University , 250 Kuo Kuang Road, Taichung 402, Taiwan
| | - Hung Kay Lee
- Department of Chemistry, The Chinese University of Hong Kong , Shatin, New Territories, Hong Kong
| | - Steve S-F Yu
- Institute of Chemistry, Academia Sinica , 128, Section 2, Academia Road, Nankang, Taipei 11529, Taiwan
| | - Sunney I Chan
- Institute of Chemistry, Academia Sinica , 128, Section 2, Academia Road, Nankang, Taipei 11529, Taiwan.,Department of Chemistry, National Taiwan University , No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan.,Noyes Laboratory, 127-72, California Institute of Technology , 1200 East California Boulevard, Pasadena, California 91125, United States
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58
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Abstract
Abstract
Relocation of iron ions in microporous Fe-FER, (Al+Fe)-FER, Fe-MFI (FER: ferrierite, MFI: silicalite) and in mesoporous Fe-MCM-41 ferrisilicate (MCM: Mobile Crystalline Material) samples was followed during redox treatments primarily by tool of the in situ Mössbauer spectroscopy. Coexistence of various Fe3+ and Fe2+ species is demonstrated. In microporous Fe-FER and Fe-MFI existence of combined μ-oxo iron dimers, Fe3+
FW-O-Fe2+
EFW can be proposed. The presence of these dimers can easily be correlated with catalytic effect shown in certain oxidation processes. Structural rearrangement can also be revealed in mesoporous Fe-MCM-41 which result in improvement of catalytic performance in CO oxidation.
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Affiliation(s)
- Károly Lázár
- Department of Nuclear Analysis, Centre for Energy Research, Hungarian Academy of Sciences, 29 – 33. Konkoly Thege M. 1121, Budapest, Hungary
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59
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Park KS, Kim JH, Park SH, Moon DJ, Roh HS, Chung CH, Um SH, Choi JH, Bae JW. Direct activation of CH4 to oxygenates and unsaturated hydrocarbons using N2O on Fe-modified zeolites. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.molcata.2016.11.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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60
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Thakur R, Gupta RK, Barman S. A comparative study of catalytic performance of rare earth metal-modified beta zeolites for synthesis of cymene. CHEMICAL PAPERS 2017. [DOI: 10.1007/s11696-016-0071-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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61
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Snyder BER, Vanelderen P, Bols ML, Hallaert SD, Böttger LH, Ungur L, Pierloot K, Schoonheydt RA, Sels BF, Solomon EI. The active site of low-temperature methane hydroxylation in iron-containing zeolites. Nature 2016; 536:317-21. [PMID: 27535535 DOI: 10.1038/nature19059] [Citation(s) in RCA: 230] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Accepted: 06/13/2016] [Indexed: 12/21/2022]
Abstract
An efficient catalytic process for converting methane into methanol could have far-reaching economic implications. Iron-containing zeolites (microporous aluminosilicate minerals) are noteworthy in this regard, having an outstanding ability to hydroxylate methane rapidly at room temperature to form methanol. Reactivity occurs at an extra-lattice active site called α-Fe(ii), which is activated by nitrous oxide to form the reactive intermediate α-O; however, despite nearly three decades of research, the nature of the active site and the factors determining its exceptional reactivity are unclear. The main difficulty is that the reactive species-α-Fe(ii) and α-O-are challenging to probe spectroscopically: data from bulk techniques such as X-ray absorption spectroscopy and magnetic susceptibility are complicated by contributions from inactive 'spectator' iron. Here we show that a site-selective spectroscopic method regularly used in bioinorganic chemistry can overcome this problem. Magnetic circular dichroism reveals α-Fe(ii) to be a mononuclear, high-spin, square planar Fe(ii) site, while the reactive intermediate, α-O, is a mononuclear, high-spin Fe(iv)=O species, whose exceptional reactivity derives from a constrained coordination geometry enforced by the zeolite lattice. These findings illustrate the value of our approach to exploring active sites in heterogeneous systems. The results also suggest that using matrix constraints to activate metal sites for function-producing what is known in the context of metalloenzymes as an 'entatic' state-might be a useful way to tune the activity of heterogeneous catalysts.
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Affiliation(s)
- Benjamin E R Snyder
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| | - Pieter Vanelderen
- Department of Chemistry, Stanford University, Stanford, California 94305, USA.,Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, KU Leuven - University of Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Max L Bols
- Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, KU Leuven - University of Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Simon D Hallaert
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Lars H Böttger
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| | - Liviu Ungur
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Kristine Pierloot
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Robert A Schoonheydt
- Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, KU Leuven - University of Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Bert F Sels
- Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, KU Leuven - University of Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Edward I Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305, USA.,Photon Science, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
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62
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Kulkarni AR, Zhao ZJ, Siahrostami S, Nørskov JK, Studt F. Monocopper Active Site for Partial Methane Oxidation in Cu-Exchanged 8MR Zeolites. ACS Catal 2016. [DOI: 10.1021/acscatal.6b01895] [Citation(s) in RCA: 144] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ambarish R. Kulkarni
- SUNCAT
Center for Interface Science and Catalysis, Department of Chemical
Engineering, Stanford University, 450 Serra Mall, Stanford, California 94305, United States
- SUNCAT
Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Zhi-Jian Zhao
- SUNCAT
Center for Interface Science and Catalysis, Department of Chemical
Engineering, Stanford University, 450 Serra Mall, Stanford, California 94305, United States
- SUNCAT
Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
- Key
Laboratory for Green Chemical Technology of Ministry of Education,
School of Chemical Engineering and Technology, Tianjin University, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, People’s Republic of China
| | - Samira Siahrostami
- SUNCAT
Center for Interface Science and Catalysis, Department of Chemical
Engineering, Stanford University, 450 Serra Mall, Stanford, California 94305, United States
| | - Jens K Nørskov
- SUNCAT
Center for Interface Science and Catalysis, Department of Chemical
Engineering, Stanford University, 450 Serra Mall, Stanford, California 94305, United States
- SUNCAT
Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Felix Studt
- SUNCAT
Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
- Institute
of Catalysis Research and Technology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- Institute
for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 18, 76131 Karlsruhe, Germany
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63
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Kawasaki S, Kamata K, Hara M. Dioxygen Activation by a Hexagonal SrMnO3Perovskite Catalyst for Aerobic Liquid-Phase Oxidation. ChemCatChem 2016. [DOI: 10.1002/cctc.201600613] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shuma Kawasaki
- Laboratory for Materials and Structures; Institute of Innovative Research; Tokyo Institute of Technology; Nagatsuta-cho 4259, Midori-ku Yokohama 226-8503 Japan
| | - Keigo Kamata
- Laboratory for Materials and Structures; Institute of Innovative Research; Tokyo Institute of Technology; Nagatsuta-cho 4259, Midori-ku Yokohama 226-8503 Japan
| | - Michikazu Hara
- Laboratory for Materials and Structures; Institute of Innovative Research; Tokyo Institute of Technology; Nagatsuta-cho 4259, Midori-ku Yokohama 226-8503 Japan
- Advanced Low Carbon Technology Research and Development Program (ALCA); Japan Science and Technology Agency; 4-1-8 Honcho Kawaguchi 332-0012 Japan
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64
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Zhao ZJ, Kulkarni A, Vilella L, Nørskov JK, Studt F. Theoretical Insights into the Selective Oxidation of Methane to Methanol in Copper-Exchanged Mordenite. ACS Catal 2016. [DOI: 10.1021/acscatal.6b00440] [Citation(s) in RCA: 115] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zhi-Jian Zhao
- SUNCAT
Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo
Park, California 94025, United States
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
- Key
Laboratory for Green Chemical Technology of Ministry of Education,
Collaborative Innovation Center of Chemical Science and Engineering,
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
| | - Ambarish Kulkarni
- SUNCAT
Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo
Park, California 94025, United States
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Laia Vilella
- SUNCAT
Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo
Park, California 94025, United States
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
- Departament
de Quı́mica, Universitat Autònoma de Barcelona, Cerdanyola
del Vallès, 08193, Barcelona, Spain
| | - Jens K. Nørskov
- SUNCAT
Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo
Park, California 94025, United States
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Felix Studt
- SUNCAT
Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo
Park, California 94025, United States
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
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65
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Wu L, Navrotsky A. Synthesis and thermodynamic study of transition metal ion (Mn²⁺, Co²⁺, Cu²⁺, and Zn²⁺) exchanged zeolites A and Y. Phys Chem Chem Phys 2016; 18:10116-22. [PMID: 27009783 DOI: 10.1039/c5cp07918g] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transition metal cations (Mn(2+), Co(2+), Cu(2+), and Zn(2+)) containing zeolites A and Y were synthesized by ion exchange and their thermochemistry was investigated by differential scanning calorimetry and high temperature oxide melt solution calorimetry. The enthalpies of formation from oxides for Mn, Co, Cu, and Zn zeolites A range from 14.0 ± 1.3 to 67.6 ± 5.5 kJ mol(-1) and those for Mn, Co, Cu, and Zn zeolites Y range from 8.0 ± 2.0 to 32.6 ± 1.8 kJ mol(-1). All these zeolites are thus metastable with respect to oxide components and to other dense phases. The formation enthalpies of Mn and Zn exchanged zeolites A and Y are less endothermic than those of corresponding Co and Cu exchanged A and Y. These energetics are consistent with metal oxygen bond lengths and related to crystal field effects of transition metal ions. Similar thermodynamic trends have been seen in transition metal containing spinel, olivine and pyroxene materials. The enthalpies of exchange of transition metals in zeolites A and Y with sodium in aqueous solution are calculated and suggest that these zeolites could be reasonably effective sorbents for heavy metal waste.
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Affiliation(s)
- Lili Wu
- Peter A. Rock Thermochemistry Laboratory and NEAT ORU, University of California Davis, Davis, CA 95616, USA.
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66
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67
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Sheppard T, Daly H, Goguet A, Thompson JM. Improved Efficiency for Partial Oxidation of Methane by Controlled Copper Deposition on Surface-Modified ZSM-5. ChemCatChem 2015; 8:562-570. [PMID: 26925172 PMCID: PMC4755137 DOI: 10.1002/cctc.201500980] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 10/10/2015] [Indexed: 11/20/2022]
Abstract
The mono(μ‐oxo) dicopper cores present in the pores of Cu‐ZSM‐5 are active for the partial oxidation of methane to methanol. However, copper on the external surface reduces the ratio of active, selective sites to unselective sites. More efficient catalysts are obtained by controlling the copper deposition during synthesis. Herein, the external exchange sites of ZSM‐5 samples were passivated by bis(trimethylsilyl) trifluoroacetamide (BSTFA) followed by calcination, promoting selective deposition of intraporous copper during aqueous copper ion exchange. At an optimum level of 1–2 wt % SiO2, IR studies showed a 64 % relative reduction in external copper species and temperature‐programmed oxidation analysis showed an associated increase in the formation of methanol compared with unmodified Cu‐ZSM‐5 samples. It is, therefore, reported that the modified zeolites contained a significantly higher proportion of active, selective copper species than their unmodified counterparts with activity for partial methane oxidation to methanol.
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Affiliation(s)
- Thomas Sheppard
- School of Chemistry and Chemical EngineeringQueen's UniversityStranmillis RoadBelfastBT9 5AGNorthern Ireland
- Institute of Catalysis Research and Technology (IKFT)Karlsruhe Institute of Technology (KIT)Kaiserstrasse 1276131KarlsruheGermany
| | - Helen Daly
- School of Chemistry and Chemical EngineeringQueen's UniversityStranmillis RoadBelfastBT9 5AGNorthern Ireland
| | - Alex Goguet
- School of Chemistry and Chemical EngineeringQueen's UniversityStranmillis RoadBelfastBT9 5AGNorthern Ireland
| | - Jillian M. Thompson
- School of Chemistry and Chemical EngineeringQueen's UniversityStranmillis RoadBelfastBT9 5AGNorthern Ireland
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68
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Armstrong RD, Freakley SJ, Forde MM, Peneau V, Jenkins RL, Taylor SH, Moulijn JA, Morgan DJ, Hutchings GJ. Low temperature catalytic partial oxidation of ethane to oxygenates by Fe– and Cu–ZSM-5 in a continuous flow reactor. J Catal 2015. [DOI: 10.1016/j.jcat.2015.07.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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69
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Diagnostic Features of EPR Spectra of Superoxide Intermediates on Catalytic Surfaces and Molecular Interpretation of Their g and A Tensors. Top Catal 2015. [DOI: 10.1007/s11244-015-0420-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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70
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Single-site trinuclear copper oxygen clusters in mordenite for selective conversion of methane to methanol. Nat Commun 2015; 6:7546. [PMID: 26109507 PMCID: PMC4491810 DOI: 10.1038/ncomms8546] [Citation(s) in RCA: 421] [Impact Index Per Article: 46.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Accepted: 05/19/2015] [Indexed: 12/21/2022] Open
Abstract
Copper-exchanged zeolites with mordenite structure mimic the nuclearity and reactivity of active sites in particulate methane monooxygenase, which are enzymes able to selectively oxidize methane to methanol. Here we show that the mordenite micropores provide a perfect confined environment for the highly selective stabilization of trinuclear copper-oxo clusters that exhibit a high reactivity towards activation of carbon–hydrogen bonds in methane and its subsequent transformation to methanol. The similarity with the enzymatic systems is also implied from the similarity of the reversible rearrangements of the trinuclear clusters occurring during the selective transformations of methane along the reaction path towards methanol, in both the enzyme system and copper-exchanged mordenite. Copper-exchanged zeolites with mordenite structure can mimic the active sites in particulate methane monooxygenase. Here, the authors show that mordenite micropores can stabilize trinuclear copper-oxo clusters that exhibit a high reactivity towards activation of carbon–hydrogen bonds in methane.
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71
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Vanelderen P, Snyder BER, Tsai ML, Hadt RG, Vancauwenbergh J, Coussens O, Schoonheydt RA, Sels BF, Solomon EI. Spectroscopic Definition of the Copper Active Sites in Mordenite: Selective Methane Oxidation. J Am Chem Soc 2015; 137:6383-92. [DOI: 10.1021/jacs.5b02817] [Citation(s) in RCA: 198] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Pieter Vanelderen
- Department
of Chemistry, Stanford University, Stanford, California 94305, United States
- Center
for Surface Chemistry and Catalysis, KU Leuven, Kasteelpark Arenberg
23, 3000 Leuven, Belgium
| | - Benjamin E. R. Snyder
- Department
of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Ming-Li Tsai
- Department
of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Ryan G. Hadt
- Department
of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Julie Vancauwenbergh
- Center
for Surface Chemistry and Catalysis, KU Leuven, Kasteelpark Arenberg
23, 3000 Leuven, Belgium
| | - Olivier Coussens
- Center
for Surface Chemistry and Catalysis, KU Leuven, Kasteelpark Arenberg
23, 3000 Leuven, Belgium
| | - Robert A. Schoonheydt
- Center
for Surface Chemistry and Catalysis, KU Leuven, Kasteelpark Arenberg
23, 3000 Leuven, Belgium
| | - Bert F. Sels
- Center
for Surface Chemistry and Catalysis, KU Leuven, Kasteelpark Arenberg
23, 3000 Leuven, Belgium
| | - Edward I. Solomon
- Department
of Chemistry, Stanford University, Stanford, California 94305, United States
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72
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Self-catalysed aerobic oxidization of organic linker in porous crystal for on-demand regulation of sorption behaviours. Nat Commun 2015; 6:6350. [PMID: 25702689 DOI: 10.1038/ncomms7350] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Accepted: 01/21/2015] [Indexed: 11/08/2022] Open
Abstract
Control over the structure and property of synthetic materials is crucial for practical applications. Here we report a facile, green and controllable solid-gas reaction strategy for on-demand modification of porous coordination polymer. Copper(I) and a methylene-bridged bis-triazolate ligand are combined to construct a porous crystal consisting of both enzyme-like O2-activation site and oxidizable organic substrate. Thermogravimetry, single-crystal X-ray diffraction, electron paramagnetic resonance and infrared spectroscopy showed that the methylene groups can be oxidized by O2/air even at room temperature via formation of the highly active Cu(II)-O2(˙-) intermediate, to form carbonyl groups with enhance rigidity and polarity, without destroying the copper(I) triazolate framework. Since the oxidation degree or reaction progress can be easily monitored by the change of sample weight, gas sorption property of the crystal can be continuously and drastically (up to 4 orders of magnitude) tuned to give very high and even invertible selectivity for CO2, CH4 and C2H6.
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73
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Characterization of extraframework Zn2+ cationic sites in silicalite-2: a computational study. Struct Chem 2015. [DOI: 10.1007/s11224-015-0575-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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74
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75
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Hu E, Cheng H. Catalytic effect of transition metals on microwave-induced degradation of atrazine in mineral micropores. WATER RESEARCH 2014; 57:8-19. [PMID: 24698722 DOI: 10.1016/j.watres.2014.03.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Revised: 03/03/2014] [Accepted: 03/07/2014] [Indexed: 06/03/2023]
Abstract
With their high catalytic activity for redox reactions, transition metal ions (Cu(2+) and Fe(3+)) were exchanged into the micropores of dealuminated Y zeolites to prepare effective microporous mineral sorbents for sorption and microwave-induced degradation of atrazine. Due to its ability to complex with atrazine, loading of copper greatly increased the sorption of atrazine. Atrazine sorption on iron-exchanged zeolites was also significantly enhanced, which was attributed to the hydrolysis of Fe(3+) polycations in mineral micropores and electrostatic interactions of protonated atrazine molecules with the negatively charged pore wall surface. Copper and iron species in the micropores also significantly accelerated degradation of the sorbed atrazine (and its degradation intermediates) under microwave irradiation. The catalytic effect was attributed to the easy reducibility and high oxidation activity of Cu(2+) and Fe(3+) species stabilized in the micropores of the zeolites. It was postulated that the surface species of transition metals (monomeric Cu(2+), Cu(2+)-O-Cu(2+) complexes, FeO(+), and dinuclear Fe-O-Fe-like species) in the mineral micropores were thermally activated under microwave irradiation, and subsequently formed highly reactive sites catalyzing oxidative degradation of atrazine. The transition metal-exchanged zeolites, particularly the iron-exchanged ones, were relatively stable when leached under acidic conditions, which suggests that they are reusable in sorption and microwave-induced degradation. These findings offer valuable insights on designing of effective mineral sorbents that can selectively uptake atrazine from aqueous solutions and catalyze its degradation under microwave irradiation.
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Affiliation(s)
- Erdan Hu
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hefa Cheng
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
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76
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Solomon EI, Heppner DE, Johnston EM, Ginsbach JW, Cirera J, Qayyum M, Kieber-Emmons MT, Kjaergaard CH, Hadt RG, Tian L. Copper active sites in biology. Chem Rev 2014; 114:3659-853. [PMID: 24588098 PMCID: PMC4040215 DOI: 10.1021/cr400327t] [Citation(s) in RCA: 1147] [Impact Index Per Article: 114.7] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
| | - David E. Heppner
- Department of Chemistry, Stanford University, Stanford, CA, 94305
| | | | - Jake W. Ginsbach
- Department of Chemistry, Stanford University, Stanford, CA, 94305
| | - Jordi Cirera
- Department of Chemistry, Stanford University, Stanford, CA, 94305
| | - Munzarin Qayyum
- Department of Chemistry, Stanford University, Stanford, CA, 94305
| | | | | | - Ryan G. Hadt
- Department of Chemistry, Stanford University, Stanford, CA, 94305
| | - Li Tian
- Department of Chemistry, Stanford University, Stanford, CA, 94305
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77
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Tsai ML, Hadt RG, Vanelderen P, Sels BF, Schoonheydt RA, Solomon EI. [Cu2O]2+ active site formation in Cu-ZSM-5: geometric and electronic structure requirements for N2O activation. J Am Chem Soc 2014; 136:3522-9. [PMID: 24524659 DOI: 10.1021/ja4113808] [Citation(s) in RCA: 106] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Understanding the formation mechanism of the [Cu2O](2+) active site in Cu-ZSM-5 is important for the design of efficient catalysts to selectively convert methane to methanol and related value-added chemicals and for N2O decomposition. Spectroscopically validated DFT calculations are used here to evaluate the thermodynamic and kinetic requirements for formation of [Cu2O](2+) active sites from the reaction between binuclear Cu(I) sites and N2O in the 10-membered rings Cu-ZSM-5. Thermodynamically, the most stable Cu(I) center prefers bidentate coordination with a close to linear bite angle. This binuclear Cu(I) site reacts with N2O to generate the experimentally observed [Cu2O](2+) site. Kinetically, the reaction coordinate was evaluated for two representative binuclear Cu(I) sites. When the Cu-Cu distance is sufficiently short (<4.2 Å), N2O can bind in a "bridged" μ-1,1-O fashion and the oxo-transfer reaction is calculated to proceed with a low activation energy barrier (2 kcal/mol). This is in good agreement with the experimental Ea for N2O activation (2.5 ± 0.5 kcal/mol). However, when the Cu-Cu distance is long (>5.0 Å), N2O binds in a "terminal" η(1)-O fashion to a single Cu(I) site of the dimer and the resulting E(a) for N2O activation is significantly higher (16 kcal/mol). Therefore, bridging N2O between two Cu(I) centers is necessary for its efficient two-electron activation in [Cu2O](2+) active site formation. In nature, this N2O reduction reaction is catalyzed by a tetranuclear CuZ cluster that has a higher E(a). The lower E(a) for Cu-ZSM-5 is attributed to the larger thermodynamic driving force resulting from formation of strong Cu(II)-oxo bonds in the ZSM-5 framework.
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Affiliation(s)
- Ming-Li Tsai
- Department of Chemistry, Stanford University , Stanford, California 94305, United States
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78
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Forde MM, Armstrong RD, McVicker R, Wells PP, Dimitratos N, He Q, Lu L, Jenkins RL, Hammond C, Lopez-Sanchez JA, Kiely CJ, Hutchings GJ. Light alkane oxidation using catalysts prepared by chemical vapour impregnation: tuning alcohol selectivity through catalyst pre-treatment. Chem Sci 2014. [DOI: 10.1039/c4sc00545g] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Heat treating Fe/ZSM-5 under hydrogen leads to high dispersion of Fe species and higher alcohol selectivity in the oxidation of alkanes, as compared to oxygen treated catalysts.
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Affiliation(s)
- Michael M. Forde
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff, UK
| | | | - Rebecca McVicker
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff, UK
| | | | | | - Qian He
- Department of Materials Science and Engineering
- Lehigh University
- Bethlehem, USA
| | - Li Lu
- Department of Materials Science and Engineering
- Lehigh University
- Bethlehem, USA
| | - Robert L. Jenkins
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff, UK
| | - Ceri Hammond
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff, UK
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79
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Vennestrøm PN, Janssens TV, Kustov A, Grill M, Puig-Molina A, Lundegaard LF, Tiruvalam RR, Concepción P, Corma A. Influence of lattice stability on hydrothermal deactivation of Cu-ZSM-5 and Cu-IM-5 zeolites for selective catalytic reduction of NOx by NH3. J Catal 2014. [DOI: 10.1016/j.jcat.2013.10.017] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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80
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Forde MM, Armstrong RD, Hammond C, He Q, Jenkins RL, Kondrat SA, Dimitratos N, Lopez-Sanchez JA, Taylor SH, Willock D, Kiely CJ, Hutchings GJ. Partial oxidation of ethane to oxygenates using Fe- and Cu-containing ZSM-5. J Am Chem Soc 2013; 135:11087-99. [PMID: 23802759 DOI: 10.1021/ja403060n] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Iron and copper containing ZSM-5 catalysts are effective for the partial oxidation of ethane with hydrogen peroxide giving combined oxygenate selectivities and productivities of up to 95.2% and 65 mol kgcat(-1) h(-1), respectively. High conversion of ethane (ca. 56%) to acetic acid (ca. 70% selectivity) can be observed. Detailed studies of this catalytic system reveal a complex reaction network in which the oxidation of ethane gives a range of C2 oxygenates, with sequential C-C bond cleavage generating C1 products. We demonstrate that ethene is also formed and can be subsequently oxidized. Ethanol can be directly produced from ethane, and does not originate from the decomposition of its corresponding alkylperoxy species, ethyl hydroperoxide. In contrast to our previously proposed mechanism for methane oxidation over similar zeolite catalysts, the mechanism of ethane oxidation involves carbon-based radicals, which lead to the high conversions we observe.
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Affiliation(s)
- Michael M Forde
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building Park Place, Cardiff CF103AT, United Kingdom
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81
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Meng Y, Genuino HC, Kuo CH, Huang H, Chen SY, Zhang L, Rossi A, Suib SL. One-Step Hydrothermal Synthesis of Manganese-Containing MFI-Type Zeolite, Mn–ZSM-5, Characterization, and Catalytic Oxidation of Hydrocarbons. J Am Chem Soc 2013; 135:8594-605. [DOI: 10.1021/ja4013936] [Citation(s) in RCA: 137] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Yongtao Meng
- Department
of Chemistry and ‡Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269-3060, United
States
| | - Homer C. Genuino
- Department
of Chemistry and ‡Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269-3060, United
States
| | - Chung-Hao Kuo
- Department
of Chemistry and ‡Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269-3060, United
States
| | - Hui Huang
- Department
of Chemistry and ‡Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269-3060, United
States
| | - Sheng-Yu Chen
- Department
of Chemistry and ‡Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269-3060, United
States
| | - Lichun Zhang
- Department
of Chemistry and ‡Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269-3060, United
States
| | - Angelo Rossi
- Department
of Chemistry and ‡Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269-3060, United
States
| | - Steven L. Suib
- Department
of Chemistry and ‡Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269-3060, United
States
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82
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Maupin I, Mijoin J, Belin T, Morais C, Montouillout V, Duprez D, Bion N. Direct evidence of the role of dispersed ceria on the activation of oxygen in NaX zeolite by coupling the 17O/16O isotopic exchange and 17O solid-state NMR. J Catal 2013. [DOI: 10.1016/j.jcat.2013.01.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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83
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Bordiga S, Groppo E, Agostini G, van Bokhoven JA, Lamberti C. Reactivity of Surface Species in Heterogeneous Catalysts Probed by In Situ X-ray Absorption Techniques. Chem Rev 2013; 113:1736-850. [DOI: 10.1021/cr2000898] [Citation(s) in RCA: 488] [Impact Index Per Article: 44.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Silvia Bordiga
- Department of Chemistry and NIS Centre of Excellence, Università di Torino and INSTM Reference Center, Via P. Giuria 7, 10125 Torino, Italy
| | - Elena Groppo
- Department of Chemistry and NIS Centre of Excellence, Università di Torino and INSTM Reference Center, Via P. Giuria 7, 10125 Torino, Italy
| | - Giovanni Agostini
- Department of Chemistry and NIS Centre of Excellence, Università di Torino and INSTM Reference Center, Via P. Giuria 7, 10125 Torino, Italy
| | - Jeroen A. van Bokhoven
- ETH Zurich, Institute for Chemical and Bioengineering, HCI E127 8093 Zurich, Switzerland
- Laboratory for Catalysis and Sustainable Chemistry (LSK) Swiss Light Source, Paul Scherrer Instituteaul Scherrer Institute, Villigen, Switzerland
| | - Carlo Lamberti
- Department of Chemistry and NIS Centre of Excellence, Università di Torino and INSTM Reference Center, Via P. Giuria 7, 10125 Torino, Italy
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84
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Deka U, Lezcano-Gonzalez I, Weckhuysen BM, Beale AM. Local Environment and Nature of Cu Active Sites in Zeolite-Based Catalysts for the Selective Catalytic Reduction of NOx. ACS Catal 2013. [DOI: 10.1021/cs300794s] [Citation(s) in RCA: 265] [Impact Index Per Article: 24.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Upakul Deka
- Materials Innovation Institute (M2i), Mekelweg 2, 2628 CD Delft, The Netherlands
- Inorganic Chemistry and Catalysis
Group, Utrecht University, Universiteitsweg
99, 3584 CA, Utrecht, The Netherlands
| | - Ines Lezcano-Gonzalez
- Materials Innovation Institute (M2i), Mekelweg 2, 2628 CD Delft, The Netherlands
- Inorganic Chemistry and Catalysis
Group, Utrecht University, Universiteitsweg
99, 3584 CA, Utrecht, The Netherlands
| | - Bert M. Weckhuysen
- Inorganic Chemistry and Catalysis
Group, Utrecht University, Universiteitsweg
99, 3584 CA, Utrecht, The Netherlands
| | - Andrew M. Beale
- Inorganic Chemistry and Catalysis
Group, Utrecht University, Universiteitsweg
99, 3584 CA, Utrecht, The Netherlands
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85
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Leithall RM, Shetti VN, Maurelli S, Chiesa M, Gianotti E, Raja R. Toward Understanding the Catalytic Synergy in the Design of Bimetallic Molecular Sieves for Selective Aerobic Oxidations. J Am Chem Soc 2013; 135:2915-8. [DOI: 10.1021/ja3119064] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Vasudev N. Shetti
- Department of Chemistry
and NIS-Centre
of Excellence, University of Turin, 10125
Turin, Italy
| | - Sara Maurelli
- Department of Chemistry
and NIS-Centre
of Excellence, University of Turin, 10125
Turin, Italy
| | - Mario Chiesa
- Department of Chemistry
and NIS-Centre
of Excellence, University of Turin, 10125
Turin, Italy
| | - Enrica Gianotti
- Department of Chemistry
and NIS-Centre
of Excellence, University of Turin, 10125
Turin, Italy
- Dipartimento
di Scienze e Innovazione
Tecnologica, Centro Interdisciplinare Nano-SiSTeMI, Università del Piemonte Orientale, 15100 Alessandria, Italy
| | - Robert Raja
- School of
Chemistry, University of Southampton, Southampton
SO17 1BJ,
U.K
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86
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Vanelderen P, Vancauwenbergh J, Sels BF, Schoonheydt RA. Coordination chemistry and reactivity of copper in zeolites. Coord Chem Rev 2013. [DOI: 10.1016/j.ccr.2012.07.008] [Citation(s) in RCA: 143] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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87
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Gómez-Hortigüela L, Corà F, Catlow CRA. Complementary mechanistic properties of Fe- and Mn-doped aluminophosphates in the catalytic aerobic oxidation of hydrocarbons. Phys Chem Chem Phys 2013; 15:6870-4. [DOI: 10.1039/c3cp51079d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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88
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Giordanino F, Vennestrøm PNR, Lundegaard LF, Stappen FN, Mossin S, Beato P, Bordiga S, Lamberti C. Characterization of Cu-exchanged SSZ-13: a comparative FTIR, UV-Vis, and EPR study with Cu-ZSM-5 and Cu-β with similar Si/Al and Cu/Al ratios. Dalton Trans 2013; 42:12741-61. [DOI: 10.1039/c3dt50732g] [Citation(s) in RCA: 271] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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89
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Juita, Dlugogorski BZ, Kennedy EM, Mackie JC. Low temperature oxidation of linseed oil: a review. ACTA ACUST UNITED AC 2012. [DOI: 10.1186/2193-0414-1-3] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Abstract
This review analyses and summarises the previous investigations on the oxidation of linseed oil and the self-heating of cotton and other materials impregnated with the oil. It discusses the composition and chemical structure of linseed oil, including its drying properties. The review describes several experimental methods used to test the propensity of the oil to induce spontaneous heating and ignition of lignocellulosic materials soaked with the oil. It covers the thermal ignition of the lignocellulosic substrates impregnated with the oil and it critically evaluates the analytical methods applied to investigate the oxidation reactions of linseed oil.
Initiation of radical chains by singlet oxygen (1Δg), and their propagation underpin the mechanism of oxidation of linseed oil, leading to the self-heating and formation of volatile organic species and higher molecular weight compounds. The review also discusses the role of metal complexes of cobalt, iron and manganese in catalysing the oxidative drying of linseed oil, summarising some kinetic parameters such as the rate constants of the peroxidation reactions.
With respect to fire safety, the classical theory of self-ignition does not account for radical and catalytic reactions and appears to offer limited insights into the autoignition of lignocellulosic materials soaked with linseed oil. New theoretical and numerical treatments of oxidation of such materials need to be developed. The self-ignition induced by linseed oil is predicated on the presence of both a metal catalyst and a lignocellulosic substrate, and the absence of any prior thermal treatment of the oil, which destroys both peroxy radicals and singlet O2 sensitisers. An overview of peroxyl chemistry included in the article will be useful to those working in areas of fire science, paint drying, indoor air quality, biofuels and lipid oxidation.
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90
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Hammond C, Conrad S, Hermans I. Oxidative methane upgrading. CHEMSUSCHEM 2012; 5:1668-1686. [PMID: 22848012 DOI: 10.1002/cssc.201200299] [Citation(s) in RCA: 171] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2012] [Indexed: 06/01/2023]
Abstract
The economically viable oxidative upgrading of methane presents one of the most difficult but rewarding challenges within catalysis research. Its potential to revolutionalise the chemical value chain, coupled with the associated supremely challenging scientific aspects, has ensured this topic's high popularity over the preceeding decades. Herein, we report a non-exhaustive account of the current developments within the field of oxidative methane upgrading and summarise the pertaining challenges that have yet to be solved.
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Affiliation(s)
- Ceri Hammond
- Department of Chemistry and Applied Biosciences, ETH Zurich, Switzerland
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91
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Barbaro P, Liguori F, Linares N, Marrodan CM. Heterogeneous Bifunctional Metal/Acid Catalysts for Selective Chemical Processes. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200529] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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92
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Göltl F, Hafner J. Structure and properties of metal-exchanged zeolites studied using gradient-corrected and hybrid functionals. I. Structure and energetics. J Chem Phys 2012; 136:064501. [PMID: 22360189 DOI: 10.1063/1.3676408] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The structural and energetic properties of purely siliceous, proton-, and Cu- and Co-exchanged chabazite have been studied using periodic density-functional (DFT) calculations with both conventional gradient-corrected exchange-correlation functionals and hybrid functionals mixing exact (i.e., Hartree-Fock) and DFT exchange. Spin-polarized and fixed-moment calculations have been performed to determine the equilibrium and excited spin-configurations of the metal-exchanged chabazites. For the purely siliceous chabazite, hybrid functionals predict a slightly more accurate cell volume and lattice geometry. For isolated Al/Si substitution sites, gradient-corrected functionals predict that the lattice distortion induced by the substitution preserves the local tetrahedral symmetry, whereas hybrid functionals lead to a distorted Al coordination with two short and two long Al-O bonds. Hybrid functionals yield a stronger cation-framework binding that conventional functionals in metal-exchanged zeolites, they favor shorter cation-oxygen bonds and eventually also a higher coordination of the cation. Both types of functionals predict the same spin in the ground-state. The structural optimization of the excited spin-states shows that the formation of a high-spin configuration leads to a strong lattice relaxation and a weaker cation-framework bonding. For both Cu- and Co-exchanged chabazite, the prediction of a preferred location of the cation in a six-membered ring of the zeolite agrees with experiment, but the energy differences between possible cation locations and the lattice distortion induced by the Al/Si substitution and the bonding of the cation depends quite significantly on the choice of the functional. All functionals predict similar energy differences for excited spin states. Spin-excitations are shown to be accompanied by significant changes in the cation coordination, which are more pronounced with hybrid functionals. The consequences of electronic spectra and chemical reactivity are analyzed in the following papers.
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Affiliation(s)
- Florian Göltl
- Fakultät für Physik and Center for Computational Materials Science, Universität Wien, Sensengasse 8/12, A-1090 Wien, Austria
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93
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Forde MM, Grazia BC, Armstrong R, Jenkins RL, Rahim MHA, Carley AF, Dimitratos N, Lopez-Sanchez JA, Taylor SH, McKeown NB, Hutchings GJ. Methane oxidation using silica-supported N-bridged di-iron phthalocyanine catalyst. J Catal 2012. [DOI: 10.1016/j.jcat.2012.03.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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94
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Tang B, Lu XH, Zhou D, Lei J, Niu ZH, Fan J, Xia QH. Highly efficient epoxidation of styrene and α-pinene with air over Co2+-exchanged ZSM-5 and Beta zeolites. CATAL COMMUN 2012. [DOI: 10.1016/j.catcom.2012.01.029] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
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95
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Catecholase activity investigation for pyridazinone- and thiopyridazinone-based ligands. RESEARCH ON CHEMICAL INTERMEDIATES 2012. [DOI: 10.1007/s11164-012-0520-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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96
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Göltl F, Hafner J. Structure and properties of metal-exchanged zeolites studied using gradient-corrected and hybrid functionals. II. Electronic structure and photoluminescence spectra. J Chem Phys 2012; 136:064502. [DOI: 10.1063/1.3676409] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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97
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Fu Z, Song D, Zeng Y, Liao S, Dai J. A layered zinc phosphate decorated with organic fluorophores for selective luminescent sensing of metal cations. Dalton Trans 2012; 41:10910-2. [DOI: 10.1039/c2dt31276j] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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98
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Čejka J, Centi G, Perez-Pariente J, Roth WJ. Zeolite-based materials for novel catalytic applications: Opportunities, perspectives and open problems. Catal Today 2012. [DOI: 10.1016/j.cattod.2011.10.006] [Citation(s) in RCA: 250] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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99
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Vanelderen P, Hadt RG, Smeets PJ, Solomon EI, Schoonheydt RA, Sels BF. Cu-ZSM-5: A biomimetic inorganic model for methane oxidation. J Catal 2011; 284:157-164. [PMID: 23487537 PMCID: PMC3593946 DOI: 10.1016/j.jcat.2011.10.009] [Citation(s) in RCA: 142] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The present work highlights recent advances in elucidating the methane oxidation mechanism of inorganic Cu-ZSM-5 biomimic and in identifying the reactive intermediates that are involved. Such molecular understanding is important in view of upgrading abundantly available methane, but also to comprehend the working mechanism of genuine Cu-containing oxidation enzymes.
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Affiliation(s)
- Pieter Vanelderen
- Center for Surface Chemistry and Catalysis, K.U.Leuven, Kasteelpark Arenberg 23, B-3001 Leuven, Belgium
| | - Ryan G. Hadt
- Department of Chemistry, Stanford University, Stanford, CA 94305, USA
| | - Pieter J. Smeets
- Center for Surface Chemistry and Catalysis, K.U.Leuven, Kasteelpark Arenberg 23, B-3001 Leuven, Belgium
- Department of Chemistry, Stanford University, Stanford, CA 94305, USA
| | - Edward I. Solomon
- Department of Chemistry, Stanford University, Stanford, CA 94305, USA
| | - Robert A. Schoonheydt
- Center for Surface Chemistry and Catalysis, K.U.Leuven, Kasteelpark Arenberg 23, B-3001 Leuven, Belgium
| | - Bert F. Sels
- Center for Surface Chemistry and Catalysis, K.U.Leuven, Kasteelpark Arenberg 23, B-3001 Leuven, Belgium
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Yumura T, Nanba T, Torigoe H, Kuroda Y, Kobayashi H. Behavior of Ag3 clusters inside a nanometer-sized space of ZSM-5 zeolite. Inorg Chem 2011; 50:6533-42. [PMID: 21692451 DOI: 10.1021/ic2001514] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We found from DFT calculations that Ag-Ag orbital interactions as well as Ag-O electrostatic interactions determine the structures of three silver cations inside a nanometer-sized cavity of ZSM-5 (Ag(3)-ZSM-5) in lower and higher spin states. Both interactions strongly depend on the number of Al atoms substituted for Si atoms on the ZSM-5 framework (ZSM-5(Al(n))), where n ranges from 1 to 3. In smaller n, stronger Ag-Ag orbital interactions and weaker Ag-O electrostatic interactions operate. Accordingly, there are significant dependencies of the structures of three silver cations on the number of Al atoms. In lower spin states of Ag(3)-ZSM-5(Al(1)) and Ag(3)-ZSM-5(Al(2)), D(3h)-like triangle clusters are contained inside ZSM-5 whereas their higher spin states have triangle clusters distorted significantly from the D(3h) structure. In lower spin states, the totally symmetric orbital consisting of 5s(Ag) orbitals is responsible for cluster formation, whereas in higher spin states occupation of a 5s(Ag)-based orbital with one node results in significant distortion of the triangle clusters. The distortion can be partially understood by analogies to Jahn-Teller distortion of the bare D(3h) Ag(3)(+) cluster in the triplet spin state. When n is 3, we found that three silver cations are isolated in a lower spin state and that a linear cluster consisting of two silver cations is formed in a higher spin state. Thus, we demonstrate from DFT calculations that the number of Al atoms can control the properties of three silver cations inside a ZSM-5 cavity. Since the structural and electronic features of the enclosed silver clusters can link to their catalytic properties, the DFT findings can help us to understand the catalytic activity of Ag-ZSM-5.
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Affiliation(s)
- Takashi Yumura
- Department of Chemistry and Materials Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan.
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