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Léval A, Junge H, Beller M. Manganese( i) κ 2- NN complex-catalyzed formic acid dehydrogenation. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00769b] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
This work updates the first non-phosphine-based Mn complex able to perform the formic acid dehydrogenation (FA DH) in the presence of amines. Significant improvements were achieved regarding TON (>7500), gas evolution (>20 L), and lower CO content.
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Steinlechner C, Roesel AF, Oberem E, Päpcke A, Rockstroh N, Gloaguen F, Lochbrunner S, Ludwig R, Spannenberg A, Junge H, Francke R, Beller M. Correction to Selective Earth-Abundant System for CO 2 Reduction: Comparing Photo- and Electrocatalytic Processes. ACS Catal 2019. [DOI: 10.1021/acscatal.9b05064] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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28
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Kreft S, Schoch R, Schneidewind J, Rabeah J, Kondratenko EV, Kondratenko VA, Junge H, Bauer M, Wohlrab S, Beller M. Improving Selectivity and Activity of CO2 Reduction Photocatalysts with Oxygen. Chem 2019. [DOI: 10.1016/j.chempr.2019.07.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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29
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Agapova A, Junge H, Beller M. Frontispiece: Developing Bicatalytic Cascade Reactions: Ruthenium‐catalyzed Hydrogen Generation From Methanol. Chemistry 2019. [DOI: 10.1002/chem.201984061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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30
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Kreft S, Schoch R, Schneidewind J, Rabeah J, Kondratenko EV, Kondratenko VA, Junge H, Bauer M, Wohlrab S, Beller M. Improving Selectivity and Activity of CO2 Reduction Photocatalysts with Oxygen. Chem 2019. [DOI: 10.1016/j.chempr.2019.04.006] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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31
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Zhou W, Wei Z, Spannenberg A, Jiao H, Junge K, Junge H, Beller M. Cobalt-Catalyzed Aqueous Dehydrogenation of Formic Acid. Chemistry 2019; 25:8459-8464. [PMID: 30938464 PMCID: PMC6618042 DOI: 10.1002/chem.201805612] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Indexed: 12/18/2022]
Abstract
Among the known liquid organic hydrogen carriers, formic acid attracts increasing interest in the context of safe and reversible storage of hydrogen. Here, the first molecularly defined cobalt pincer complex is disclosed for the dehydrogenation of formic acid in aqueous medium under mild conditions. Crucial for catalytic activity is the use of the specific complex 3. Compared to related ruthenium and manganese complexes 7 and 8, this optimal cobalt complex showed improved performance. DFT computations support an innocent non-classical bifunctional outer-sphere mechanism on the triplet state potential energy surface.
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Zhou W, Wei Z, Spannenberg A, Jiao H, Junge K, Junge H, Beller M. Cover Feature: Cobalt‐Catalyzed Aqueous Dehydrogenation of Formic Acid (Chem. Eur. J. 36/2019). Chemistry 2019. [DOI: 10.1002/chem.201902127] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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33
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Agapova A, Junge H, Beller M. Developing Bicatalytic Cascade Reactions: Ruthenium‐catalyzed Hydrogen Generation From Methanol. Chemistry 2019; 25:9345-9349. [DOI: 10.1002/chem.201900966] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Indexed: 11/10/2022]
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34
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Agapova A, Alberico E, Kammer A, Junge H, Beller M. Cover Feature: Catalytic Dehydrogenation of Formic Acid with Ruthenium‐PNP‐Pincer Complexes: Comparing N‐Methylated and NH‐Ligands (ChemCatChem 7/2019). ChemCatChem 2019. [DOI: 10.1002/cctc.201900484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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35
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Agapova A, Alberico E, Kammer A, Junge H, Beller M. Catalytic Dehydrogenation of Formic Acid with Ruthenium‐PNP‐Pincer Complexes: Comparing N‐Methylated and NH‐Ligands. ChemCatChem 2019. [DOI: 10.1002/cctc.201801897] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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36
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Steinlechner C, Spannenberg A, Junge H, Beller M. Tetracarbonyl[4,4-dimethyl-2-(pyridin-2-yl)-2-oxazoline-κ 2
N, N′]molybdenum(0). IUCRDATA 2019. [DOI: 10.1107/s2414314619002839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
In the title compound, [Mo(C10H12N2O)(CO)4], the molybdenum(0) center is surrounded by a bidentate diimine [4,4-dimethyl-2-(pyridin-2-yl)-2-oxazoline] and four carbonyl ligands in a distorted octahedral coordination geometry. The diimine ligand coordinates via the two nitrogen atoms.
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Steinlechner C, Roesel AF, Oberem E, Päpcke A, Rockstroh N, Gloaguen F, Lochbrunner S, Ludwig R, Spannenberg A, Junge H, Francke R, Beller M. Selective Earth-Abundant System for CO2 Reduction: Comparing Photo- and Electrocatalytic Processes. ACS Catal 2019. [DOI: 10.1021/acscatal.8b03548] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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38
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Ryabchuk P, Agapova A, Kreyenschulte C, Lund H, Junge H, Junge K, Beller M. Heterogeneous nickel-catalysed reversible, acceptorless dehydrogenation of N-heterocycles for hydrogen storage. Chem Commun (Camb) 2019; 55:4969-4972. [DOI: 10.1039/c9cc00918c] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nickel catalyst for hydrogen storage in N-heterocycles: a heterogeneous nickel catalyst promotes both hydrogenation and subsequent dehydrogenation of quinoline derivatives.
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Yu ZJ, Lou WY, Junge H, Päpcke A, Chen H, Xia LM, Xu B, Wang MM, Wang XJ, Wu QA, Lou BY, Lochbrunner S, Beller M, Luo SP. Thermally activated delayed fluorescence (TADF) dyes as efficient organic photosensitizers for photocatalytic water reduction. CATAL COMMUN 2019. [DOI: 10.1016/j.catcom.2018.09.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
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40
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Friedrich A, Bokareva OS, Luo SP, Junge H, Beller M, Kühn O, Lochbrunner S. Effective quenching and excited-state relaxation of a Cu(I) photosensitizer addressed by time-resolved spectroscopy and TDDFT calculations. Chem Phys 2018. [DOI: 10.1016/j.chemphys.2018.08.048] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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41
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Fischer S, Rösel A, Kammer A, Barsch E, Schoch R, Junge H, Bauer M, Beller M, Ludwig R. Cover Feature: Diferrate [Fe 2
(CO) 6
(μ-CO){μ-P(aryl) 2
}] −
as Self-Assembling Iron/Phosphor-Based Catalyst for the Hydrogen Evolution Reaction in Photocatalytic Proton Reduction-Spectroscopic Insights (Chem. Eur. J. 60/2018). Chemistry 2018. [DOI: 10.1002/chem.201804531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Fischer S, Rösel A, Kammer A, Barsch E, Schoch R, Junge H, Bauer M, Beller M, Ludwig R. Diferrate [Fe2
(CO)6
(μ-CO){μ-P(aryl)2
}]−
as Self-Assembling Iron/Phosphor-Based Catalyst for the Hydrogen Evolution Reaction in Photocatalytic Proton Reduction-Spectroscopic Insights. Chemistry 2018; 24:16052-16065. [DOI: 10.1002/chem.201802694] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Indexed: 01/07/2023]
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43
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Prichatz C, Trincado M, Tan L, Casas F, Kammer A, Junge H, Beller M, Grützmacher H. Highly Efficient Base-Free Dehydrogenation of Formic Acid at Low Temperature. CHEMSUSCHEM 2018; 11:3092-3095. [PMID: 30062851 DOI: 10.1002/cssc.201801072] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 07/17/2018] [Indexed: 06/08/2023]
Abstract
The ruthenium complex [RuH2 (PPh3 )4 ] is a competent catalyst for the selective dehydrogenation of formic acid (FA) at low temperature. It tolerates water and shows excellent performance (TOF up to 36 000 h-1 at 60 °C). Remarkably, no basic additives are necessary to obtain such high activity and the defined complex is stable for up to 120 days, making this system one of the most effective formic acid dehydrogenation catalysts known to date.
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Oberem E, Roesel AF, Rosas-Hernández A, Kull T, Fischer S, Spannenberg A, Junge H, Beller M, Ludwig R, Roemelt M, Francke R. Mechanistic Insights into the Electrochemical Reduction of CO2 Catalyzed by Iron Cyclopentadienone Complexes. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00517] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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45
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Müller A, Peglow S, Karnahl M, Kruth A, Junge H, Brüser V, Scheu C. Morphology, Optical Properties and Photocatalytic Activity of Photo- and Plasma-Deposited Au and Au/Ag Core/Shell Nanoparticles on Titania Layers. NANOMATERIALS (BASEL, SWITZERLAND) 2018; 8:E502. [PMID: 29986457 PMCID: PMC6070863 DOI: 10.3390/nano8070502] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 06/28/2018] [Accepted: 07/04/2018] [Indexed: 11/22/2022]
Abstract
Titania is a promising material for numerous photocatalytic reactions such as water splitting and the degradation of organic compounds (e.g., methanol, phenol). Its catalytic performance can be significantly increased by the addition of co-catalysts. In this study, Au and Au/Ag nanoparticles were deposited onto mesoporous titania thin films using photo-deposition (Au) and magnetron-sputtering (Au and Au/Ag). All samples underwent comprehensive structural characterization by grazing incidence X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Nanoparticle distributions and nanoparticle size distributions were correlated to the deposition methods. Light absorption measurements showed features related to diffuse scattering, the band gap of titania and the local surface plasmon resonance of the noble metal nanoparticles. Further, the photocatalytic activities were measured using methanol as a hole scavenger. All nanoparticle-decorated thin films showed significant performance increases in hydrogen evolution under UV illumination compared to pure titania, with an evolution rate of up to 372 μL H₂ h−1 cm−2 representing a promising approximately 12-fold increase compared to pure titania.
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Ryabchuk P, Agostini G, Pohl MM, Lund H, Agapova A, Junge H, Junge K, Beller M. Intermetallic nickel silicide nanocatalyst-A non-noble metal-based general hydrogenation catalyst. SCIENCE ADVANCES 2018; 4:eaat0761. [PMID: 29888329 PMCID: PMC5993471 DOI: 10.1126/sciadv.aat0761] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 04/18/2018] [Indexed: 05/27/2023]
Abstract
Hydrogenation reactions are essential processes in the chemical industry, giving access to a variety of valuable compounds including fine chemicals, agrochemicals, and pharmachemicals. On an industrial scale, hydrogenations are typically performed with precious metal catalysts or with base metal catalysts, such as Raney nickel, which requires special handling due to its pyrophoric nature. We report a stable and highly active intermetallic nickel silicide catalyst that can be used for hydrogenations of a wide range of unsaturated compounds. The catalyst is prepared via a straightforward procedure using SiO2 as the silicon atom source. The process involves thermal reduction of Si-O bonds in the presence of Ni nanoparticles at temperatures below 1000°C. The presence of silicon as a secondary component in the nickel metal lattice plays the key role in its properties and is of crucial importance for improved catalytic activity. This novel catalyst allows for efficient reduction of nitroarenes, carbonyls, nitriles, N-containing heterocycles, and unsaturated carbon-carbon bonds. Moreover, the reported catalyst can be used for oxidation reactions in the presence of molecular oxygen and is capable of promoting acceptorless dehydrogenation of unsaturated N-containing heterocycles, opening avenues for H2 storage in organic compounds. The generality of the nickel silicide catalyst is demonstrated in the hydrogenation of over a hundred of structurally diverse unsaturated compounds. The wide application scope and high catalytic activity of this novel catalyst make it a nice alternative to known general hydrogenation catalysts, such as Raney nickel and noble metal-based catalysts.
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Zhang P, Guo YJ, Chen J, Zhao YR, Chang J, Junge H, Beller M, Li Y. Streamlined hydrogen production from biomass. Nat Catal 2018. [DOI: 10.1038/s41929-018-0062-0] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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48
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Giereth R, Frey W, Junge H, Tschierlei S, Karnahl M. Frontispiece: Copper Photosensitizers Containing P^N Ligands and Their Influence on Photoactivity and Stability. Chemistry 2017. [DOI: 10.1002/chem.201786963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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49
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Tang C, Surkus AE, Chen F, Pohl MM, Agostini G, Schneider M, Junge H, Beller M. A Stable Nanocobalt Catalyst with Highly Dispersed CoN
x
Active Sites for the Selective Dehydrogenation of Formic Acid. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201710766] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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50
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Tang C, Surkus AE, Chen F, Pohl MM, Agostini G, Schneider M, Junge H, Beller M. A Stable Nanocobalt Catalyst with Highly Dispersed CoN
x
Active Sites for the Selective Dehydrogenation of Formic Acid. Angew Chem Int Ed Engl 2017; 56:16616-16620. [DOI: 10.1002/anie.201710766] [Citation(s) in RCA: 100] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Indexed: 11/09/2022]
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