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Kavun, Vitalii (author), Uslamin, E. (author), van der Linden, B. (author), Canossa, Stefano (author), Goryachev, A. (author), Bos, Emma E. (author), Garcia Santaclara, J. (author), Smolentsev, Grigory (author), Repo, Eveliina (author), van der Veen, M.A. (author)Titanium-based metal-organic framework, NH2-MIL-125(Ti), has been widely investigated for photocatalytic applications but has low activity in the hydrogen evolution reaction (HER). In this work, we show a one-step low-cost postmodification of NH2-MIL-125(Ti) via impregnation of Co(NO3)2. The resulting Co@NH2-MIL-125(Ti) with embedded single...journal article 2023
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Alphand, Véronique (author), van Berkel, Willem J.H. (author), Jurkaš, Valentina (author), Kara, Selin (author), Kourist, Robert (author), Kroutil, Wolfgang (author), Mascia, Francesco (author), Nowaczyk, Marc M. (author), Paul, C.E. (author)The recent increase of interest in photocatalysis spread to biocatalysis and triggered a rush for the development of light-dependent enzyme-mediated or enzyme-coupled processes. After several years of intense research on photobiocatalysis, it is time to evaluate the state of the field in a structured manner. In this Perspective, we suggest to...journal article 2023
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Hussain, M.Z. (author), Großmann, Paula F. (author), Kohler, Fabian (author), Kratky, Tim (author), Kronthaler, Laura (author), van der Linden, B. (author), Rodewald, Katia (author), Rieger, Bernhard (author), Fischer, Roland A. (author), Xia, Yongde (author)Direct ink writing technique is used to 3D print Ti-metal–organic framework (MOF) NH<sub>2</sub>-MIL-125 mixed with boehmite dispersal. Pt is also deposited onto 3D-printed monolith using atomic layer deposition (ALD) to offer additional catalytic sites. The Ti-MOF-derived powder sample and the pyrolyzed 3D-printed monolith samples are...journal article 2022
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Duong, Hong T. (author), Wu, Y. (author), Sutor, Alexander (author), Burek, Bastien O. (author), Hollmann, F. (author), Bloh, Jonathan Z. (author)Light-driven biocatalytic processes are notoriously hampered by poor penetration of light into the turbid reaction media. In this study, wirelessly powered light-emitting diodes are found to represent an efficient and scalable approach for process intensification of the photobiosynthetic production of diesel alkanes from renewable fatty acids...journal article 2021
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Schreck, Murielle (author), Kleger, Nicole (author), Matter, Fabian (author), Kwon, Junggou (author), Tervoort, Elena (author), Masania, K. (author), Studart, André R. (author), Niederberger, Markus (author)Monolithic aerogels composed of crystalline nanoparticles enable photocatalysis in three dimensions, but they suffer from low mechanical stability and it is difficult to produce them with complex geometries. Here, an approach to control the geometry of the photocatalysts to optimize their photocatalytic performance by introducing carefully...journal article 2021
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Benz, D. (author)Photocatalysts, contrary to conventional catalysts, utilize light to drive a reaction. By absorption of photons, electrons are excited and reach higher states to initiate a redox reaction. This principle can be broadly used to produce chemicals such as hydrogen via the reduction of water or transform carbon dioxide into solar fuels, i.e.,...doctoral thesis 2020
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Ampurdanés, Jordi (author), Bunea, S. (author), Urakawa, A. (author)Electrolysis-assisted nitrate (NO<sub>3</sub><sup>−</sup>) reduction is a promising approach for its conversion to harmless N<sub>2</sub> from waste, ground, and drinking water due to the possible process simplicity by in-situ generation of H<sub>2</sub>/H/H<sup>+</sup> by water electrolysis and to the flexibility given by tunable redox...journal article 2020
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Ma, Yunjian (author), Zhang, Xizhen (author), Zhang, W. (author), Li, Peilin (author), Li, Yongru (author), Hollmann, F. (author), Wang, Yonghua (author)A photobiocatalytic cascade transforming natural triglycerides into alkanes/alkenes is proposed. Starting from natural triglycerides, free fatty acids have been obtained using lipases. The free fatty acids were then, in a photoenzymatic step, decarboxylated into the C1-shortened alkanes using a recently described photodecarboxylase from...journal article 2020
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Willot, S.J. (author), Fernandez Fueyo, E. (author), Tieves, F. (author), Pesic, M. (author), Alcalde, Miguel (author), Arends, I.W.C.E. (author), Park, Chan Beum (author), Hollmann, F. (author)Peroxygenases require a controlled supply of H<sub>2</sub>O<sub>2</sub> to operate efficiently. Here, we propose a photocatalytic system for the reductive activation of ambient O<sub>2</sub> to produce H<sub>2</sub>O<sub>2</sub> which uses the energy provided by visible light more efficiently based on the combination of wavelength...journal article 2019
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Burek, Bastien O. (author), de Boer, Sabrina R. (author), Tieves, F. (author), Zhang, W. (author), van Schie, M.M.C.H. (author), Bormann, Sebastian (author), Alcalde, Miguel (author), Holtmann, Dirk (author), Hollmann, F. (author)Photoenzymatic cascades can be used for selective oxygenation of C−H-Bonds under mild conditions circumventing the hydrogen peroxide mediated peroxygenase inactivation via in situ H<sub>2</sub>O<sub>2</sub> generation. Here, we report the “on demand” production of hydrogen peroxide via methanol assisted reduction of molecular oxygen using UV...journal article 2019
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van Schie, M.M.C.H. (author), Zhang, W. (author), Tieves, F. (author), Choi, Da Som (author), Park, Chan Beum (author), Burek, Bastien O. (author), Bloh, Jonathan Z. (author), Arends, I.W.C.E. (author), Paul, C.E. (author), Alcalde, Miguel (author), Hollmann, F. (author)Peroxygenases are very interesting catalysts for specific oxyfunctionalization chemistry. Instead of relying on complicated electron transport chains, they rely on simple hydrogen peroxide as the stoichiometric oxidant. Their poor robustness against H<sub>2</sub>O<sub>2</sub> can be addressed via in situ generation of H<sub>2</sub>O<sub>2<...journal article 2019
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Fadlallah, M. M. (author), Shibl, M. F. (author), Vlugt, T.J.H. (author), Schwingenschlögl, U. (author)The large band gap of SrTiO<sub>3</sub> is disadvantageous for photocatalytic applications. We therefore study cation codoping to modify the size of the band gap and extend the absorption to visible light. We identify efficient codoping schemes that guarantee charge compensation to avoid creation of localized states. Using the Heyd-Scuseria...journal article 2018
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Huijbers, M.M.E. (author), Zhang, W. (author), Tonin, F. (author), Hollmann, F. (author)The photoenzymatic decarboxylation of fatty acids to alkanes is proposed as an alternative approach for the synthesis of biodiesel. By using a recently discovered photodecarboxylase from Chlorella variabilis NC64A (CvFAP) we demonstrate the irreversible preparation of alkanes from fatty acids and triglycerides. Several fatty acids and their...journal article 2018
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Zhang, W. (author), Burek, Bastien O. (author), Fernandez Fueyo, E. (author), Alcalde, Miguel (author), Bloh, Jonathan Z. (author), Hollmann, F. (author)Selective oxyfunctionalizations of inert C−H bonds can be achieved under mild conditions by using peroxygenases. This approach, however, suffers from the poor robustness of these enzymes in the presence of hydrogen peroxide as the stoichiometric oxidant. Herein, we demonstrate that inorganic photocatalysts such as gold–titanium dioxide...journal article 2017
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Zhang, W. (author), Gacs, Jenő (author), Arends, I.W.C.E. (author), Hollmann, F. (author)The aerobic organocatalytic oxidation of alcohols was achieved by using water-soluble sodium anthraquinone sulfonate. Under visible-light activation, this catalyst mediated the aerobic oxidation of alcohols to aldehydes and ketones. The photo-oxyfunctionalization of alkanes was also possible under these conditions.journal article 2017
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Cofactor-Free, Direct Photoactivation of Enoate Reductases for the Asymmetric Reduction of C=C BondsLee, Sahng Ha (author), Choi, Da Som (author), Pesic, M. (author), Lee, Yang Woo (author), Paul, C.E. (author), Hollmann, F. (author), Park, Chan Beum (author)Enoate reductases from the family of old yellow enzymes (OYEs) can catalyze stereoselective trans-hydrogenation of activated C=C bonds. Their application is limited by the necessity for a continuous supply of redox equivalents such as nicotinamide cofactors [NAD(P)H]. Visible light-driven activation of OYEs through NAD(P)H-free, direct...journal article 2017
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Churakova, E. (author)Biocatalytic oxyfunctionalizations, especially of non - activated hydrocarbons, attract considerable attention for synthetic organic chemistry thanks to their high chemo-, regio-, and stereoselectivity, which difficult to achieve by chemical means. Many enzymatic oxyfunctionalizations have been described. However, there are many hurdles towards...doctoral thesis 2014
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Wu, Q. (author)Conventional TiO2 based photocatalysts oxidize NOx to nitrates which do not automatically desorb and have to be washed away from the catalyst surface. To avoid this, the research described in this thesis aims to design new photocatalysts that can photo-reduce NO into N2 and O2. Previous efforts in the literature have shown that catalysts...doctoral thesis 2012
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Saad, M.S.Hamdy M. (author)The new mesoporous material; TUD-1 is chosen of which the synthesis, characterization, and functionalization for (photo)-catalytic performance are extensively investigated in this study. The synthesis of the new catalytic materials M TUD-1 (M = Ti, V, Cr, Mo, Fe, Co and Cu) is carried out through an easy one-pot synthesis procedure, mainly...doctoral thesis 2005