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Krieger A, Wagner M, Haschke S, Kröckel C, Bachmann J, Hauke F, Hirsch A, Gröhn F. Self-assembled hybrid organic-MoS 3-nanoparticle catalyst for light energy conversion. Nanoscale 2020; 12:22952-22957. [PMID: 33196715 DOI: 10.1039/d0nr04820h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We present photocatalytically active, stable polymer-amorphous-MoS3-nanoparticle hybrid structures in aqueous solution. Below 10 nm MoS3 particles in the polymer exhibit an up to 7.5-fold increased photocatalytic activity compared to the neat nanoparticles without any additional photosensitizer. Supramolecular interactions are key in directing the structure formation of the hybrid assembly. The hybrid structures bear potential as novel affordable photocatalysts for solar energy conversion.
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Affiliation(s)
- A Krieger
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM) and Bavarian Polymer Institute, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany.
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Waidhas F, Haschke S, Khanipour P, Fromm L, Görling A, Bachmann J, Katsounaros I, Mayrhofer KJJ, Brummel O, Libuda J. Secondary Alcohols as Rechargeable Electrofuels: Electrooxidation of Isopropyl Alcohol at Pt Electrodes. ACS Catal 2020. [DOI: 10.1021/acscatal.0c00818] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
| | - Sandra Haschke
- Lehrstuhl Chemistry of Thin Film Materials, IZNF, Friedrich-Alexander-Universität Erlangen-Nürnberg, Cauerstrasse 3, 91058 Erlangen, Germany
| | - Peyman Khanipour
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, Egerlandstrasse 3, Erlangen 91058, Germany
| | - Lukas Fromm
- Lehrstuhl für Theoretische Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | - Andreas Görling
- Lehrstuhl für Theoretische Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | - Julien Bachmann
- Lehrstuhl Chemistry of Thin Film Materials, IZNF, Friedrich-Alexander-Universität Erlangen-Nürnberg, Cauerstrasse 3, 91058 Erlangen, Germany
- Institute of Chemistry, Saint Petersburg State University, 26 Universitetskii Prospect, Petergof, Saint Petersburg 198504, Russia
| | - Ioannis Katsounaros
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, Egerlandstrasse 3, Erlangen 91058, Germany
| | - Karl J. J. Mayrhofer
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, Egerlandstrasse 3, Erlangen 91058, Germany
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Haschke S, Pankin D, Mikhailovskii V, Barr MKS, Both-Engel A, Manshina A, Bachmann J. Nanoporous water oxidation electrodes with a low loading of laser-deposited Ru/C exhibit enhanced corrosion stability. Beilstein J Nanotechnol 2019; 10:157-167. [PMID: 30680288 PMCID: PMC6334789 DOI: 10.3762/bjnano.10.15] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Accepted: 12/19/2018] [Indexed: 06/09/2023]
Abstract
For the oxidation of water to dioxygen, oxide-covered ruthenium metal is known as the most efficient catalyst, however, with limited stability. Herein, we present a strategy for incorporating a Ru/C composite onto a novel nanoporous electrode surface with low noble metal loading and improved stability. The Ru/C is coated on the pore walls of anodic alumina templates in a one-step laser-induced deposition method from Ru3(CO)12 solutions. Scanning electron microscopy proves the presence of a continuous Ru/C layer along the inner pore walls. The amorphous material consists of metallic Ru incorporated in a carbonaceous C matrix as shown by X-ray diffraction combined with Raman and X-ray photoelectron spectroscopies. These porous electrodes reveal enhanced stability during water oxidation as compared to planar samples at pH 4. Finally, their electrocatalytic performance depends on the geometric parameters and is optimized with 13 μm pore length, which yields 2.6 mA cm-2, or 49 A g-1, at η = 0.20 V.
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Affiliation(s)
- Sandra Haschke
- Friedrich-Alexander University Erlangen-Nürnberg, Department of Chemistry and Pharmacy, Chair of Chemistry of thin film materials, Egerlandstrasse 3a, 91058 Erlangen, Germany
| | - Dmitrii Pankin
- Saint-Petersburg State University, Center for Optical and Laser Materials Research, Uljanovskaya 5, 198504 St. Petersburg, Russia
| | - Vladimir Mikhailovskii
- Saint-Petersburg State University, Interdisciplinary Resource Center for Nanotechnology, Uljanovskaya 1, 198504 St. Petersburg, Russia
| | - Maïssa K S Barr
- Friedrich-Alexander University Erlangen-Nürnberg, Department of Chemistry and Pharmacy, Chair of Chemistry of thin film materials, Egerlandstrasse 3a, 91058 Erlangen, Germany
| | - Adriana Both-Engel
- Friedrich-Alexander University Erlangen-Nürnberg, Department of Chemistry and Pharmacy, Chair of Chemistry of thin film materials, Egerlandstrasse 3a, 91058 Erlangen, Germany
| | - Alina Manshina
- Saint-Petersburg State University, Institute of Chemistry, Universitetskii pr. 26, 198504 St. Petersburg, Russia
| | - Julien Bachmann
- Friedrich-Alexander University Erlangen-Nürnberg, Department of Chemistry and Pharmacy, Chair of Chemistry of thin film materials, Egerlandstrasse 3a, 91058 Erlangen, Germany
- Saint-Petersburg State University, Institute of Chemistry, Universitetskii pr. 26, 198504 St. Petersburg, Russia
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Haschke S, Mader M, Schlicht S, Roberts AM, Angeles-Boza AM, Barth JAC, Bachmann J. Direct oxygen isotope effect identifies the rate-determining step of electrocatalytic OER at an oxidic surface. Nat Commun 2018; 9:4565. [PMID: 30385759 PMCID: PMC6212532 DOI: 10.1038/s41467-018-07031-1] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 10/09/2018] [Indexed: 11/22/2022] Open
Abstract
Understanding the mechanism of water oxidation to dioxygen represents the bottleneck towards the design of efficient energy storage schemes based on water splitting. The investigation of kinetic isotope effects has long been established for mechanistic studies of various such reactions. However, so far natural isotope abundance determination of O2 produced at solid electrode surfaces has not been applied. Here, we demonstrate that such measurements are possible. Moreover, they are experimentally simple and sufficiently accurate to observe significant effects. Our measured kinetic isotope effects depend strongly on the electrode material and on the applied electrode potential. They suggest that in the case of iron oxide as the electrode material, the oxygen evolution reaction occurs via a rate-determining O−O bond formation via nucleophilic water attack on a ferryl unit. Understanding reaction mechanisms is crucial for catalyst design. Here, natural-abundance isotope quantifications of O2 yield mechanistically significant reaction kinetic isotope effects for water oxidation over metal oxide electrodes, the bottleneck step of water electrolysis.
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Affiliation(s)
- Sandra Haschke
- Department of Chemistry and Pharmacy, Chemistry of Thin Film Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Cauerstr. 4, 91058, Erlangen, Germany
| | - Michael Mader
- Department für Geographie und Geowissenschaften, GeoZentrum NordBayern, Applied Geology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schlossgarten 5, 91054, Erlangen, Germany
| | - Stefanie Schlicht
- Department of Chemistry and Pharmacy, Chemistry of Thin Film Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Cauerstr. 4, 91058, Erlangen, Germany
| | - André M Roberts
- Department für Geographie und Geowissenschaften, GeoZentrum NordBayern, Applied Geology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schlossgarten 5, 91054, Erlangen, Germany
| | - Alfredo M Angeles-Boza
- Department of Chemistry and Institute of Materials Science, University of Connecticut, 55 North Eagleville Rd., Storrs, CT, 06269, USA.
| | - Johannes A C Barth
- Department für Geographie und Geowissenschaften, GeoZentrum NordBayern, Applied Geology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schlossgarten 5, 91054, Erlangen, Germany.
| | - Julien Bachmann
- Department of Chemistry and Pharmacy, Chemistry of Thin Film Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Cauerstr. 4, 91058, Erlangen, Germany. .,Institute of Chemistry, Saint Petersburg State University, Universitetskii pr. 26, Saint Petersburg, Russian Federation, 198504.
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Schlicht S, Haschke S, Mikhailovskii V, Manshina A, Bachmann J. Cover Feature: Highly Reversible Water Oxidation at Ordered Nanoporous Iridium Electrodes Based on an Original Atomic Layer Deposition (ChemElectroChem 9/2018). ChemElectroChem 2018. [DOI: 10.1002/celc.201800344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Stefanie Schlicht
- Departement of Chemistry and Pharmacy Friedrich-Alexander University Erlangen-Nürnberg Egerlandstrasse 1 91058 Erlangen Germany
| | - Sandra Haschke
- Departement of Chemistry and Pharmacy Friedrich-Alexander University Erlangen-Nürnberg Egerlandstrasse 1 91058 Erlangen Germany
| | - Vladimir Mikhailovskii
- Saint-Petersburg State University, Interdisciplinary Resource Center for Nanotechnology Uljanovskaya 1 198504 St. Petersburg Russia
| | - Alina Manshina
- Saint-Petersburg State University, Institute of Chemistry Universitetskii pr. 26 198504 St. Petersburg Russia
| | - Julien Bachmann
- Departement of Chemistry and Pharmacy Friedrich-Alexander University Erlangen-Nürnberg Egerlandstrasse 1 91058 Erlangen Germany
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Schlicht S, Haschke S, Mikhailovskii V, Manshina A, Bachmann J. Highly Reversible Water Oxidation at Ordered Nanoporous Iridium Electrodes Based on an Original Atomic Layer Deposition. ChemElectroChem 2018; 5:1259-1264. [PMID: 29780685 PMCID: PMC5947304 DOI: 10.1002/celc.201800152] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Indexed: 11/16/2022]
Abstract
Nanoporous iridium electrodes are prepared and electrochemically investigated towards the water oxidation (oxygen evolution) reaction. The preparation is based on 'anodic' aluminum oxide templates, which provide straight, cylindrical nanopores. Their walls are coated using atomic layer deposition (ALD) with a newly developed reaction which results in a metallic iridium layer. The ALD film growth is quantified by spectroscopic ellipsometry and X-ray reflectometry. The morphology and composition of the electrodes are characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction. Their catalytic activity is quantified for various pore geometries by cyclic voltammetry, steady-state electrolysis, and electrochemical impedance spectroscopy. With an optimal pore length of L≈17-20 μm, we achieve current densities of J=0.28 mA cm-2 at pH 5 and J=2.4 mA cm-2 at pH 1. This platform is particularly competitive for achieving moderate current densities at very low overpotentials, that is, for a high degree of reversibility in energy storage.
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Affiliation(s)
- Stefanie Schlicht
- Departement of Chemistry and PharmacyFriedrich-Alexander University Erlangen-NürnbergEgerlandstrasse 191058ErlangenGermany
| | - Sandra Haschke
- Departement of Chemistry and PharmacyFriedrich-Alexander University Erlangen-NürnbergEgerlandstrasse 191058ErlangenGermany
| | - Vladimir Mikhailovskii
- Saint-Petersburg State University, Interdisciplinary Resource Center for NanotechnologyUljanovskaya 1198504St. PetersburgRussia
| | - Alina Manshina
- Saint-Petersburg State University, Institute of ChemistryUniversitetskii pr. 26198504St. PetersburgRussia
| | - Julien Bachmann
- Departement of Chemistry and PharmacyFriedrich-Alexander University Erlangen-NürnbergEgerlandstrasse 191058ErlangenGermany
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Haschke S, Pankin D, Petrov Y, Bochmann S, Manshina A, Bachmann J. Design Rules for Oxygen Evolution Catalysis at Porous Iron Oxide Electrodes: A 1000-Fold Current Density Increase. ChemSusChem 2017; 10:3644-3651. [PMID: 28745440 DOI: 10.1002/cssc.201701068] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 07/11/2017] [Indexed: 06/07/2023]
Abstract
Nanotubular iron(III) oxide electrodes are optimized for catalytic efficiency in the water oxidation reaction at neutral pH. The nanostructured electrodes are prepared from anodic alumina templates, which are coated with Fe2 O3 by atomic layer deposition. Scanning helium ion microscopy, X-ray diffraction, and Raman spectroscopy are used to characterize the morphologies and phases of samples submitted to various treatments. These methods demonstrate the contrasting effects of thermal annealing and electrochemical treatment. The electrochemical performances of the corresponding electrodes under dark conditions are quantified by steady-state electrolysis and electrochemical impedance spectroscopy. A rough and amorphous Fe2 O3 with phosphate incorporation is critical for the optimization of the water oxidation reaction. For the ideal pore length of 17 μm, the maximum catalytic turnover is reached with an effective current density of 140 μA cm-2 at an applied overpotential of 0.49 V.
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Affiliation(s)
- Sandra Haschke
- Friedrich-Alexander University Erlangen-Nürnberg, Department of Chemistry and Pharmacy, Egerlandstrasse 1, 91058, Erlangen, Germany
| | - Dmitrii Pankin
- Saint-Petersburg State University, Center for Optical and Laser Materials Research, Uljanovskaya 5, 198504, St. Petersburg, Russia
| | - Yuri Petrov
- Saint-Petersburg State University, Interdisciplinary Resource Center for Nanotechnology, Uljanovskaya 1, 198504, St. Petersburg, Russia
| | - Sebastian Bochmann
- Friedrich-Alexander University Erlangen-Nürnberg, Department of Chemistry and Pharmacy, Egerlandstrasse 1, 91058, Erlangen, Germany
| | - Alina Manshina
- Saint-Petersburg State University, Institute of Chemistry, Universitetskii pr. 26, 198504, St. Petersburg, Russia
| | - Julien Bachmann
- Friedrich-Alexander University Erlangen-Nürnberg, Department of Chemistry and Pharmacy, Egerlandstrasse 1, 91058, Erlangen, Germany
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