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Serrano-Jiménez J, de la Osa A, Sánchez P, Romero A, de Lucas-Consuegra A. Boosting the Electrolysis of Monosaccharide-Based Streams in an Anion-Exchange Membrane Cell. ENERGY & FUELS : AN AMERICAN CHEMICAL SOCIETY JOURNAL 2024; 38:10038-10049. [PMID: 38863685 PMCID: PMC11164063 DOI: 10.1021/acs.energyfuels.4c00136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 04/24/2024] [Accepted: 05/08/2024] [Indexed: 06/13/2024]
Abstract
A systematic study on the electrochemical reforming of monosaccharides (fructose, glucose, and xylose) using Pt-based anodic electrocatalysts is here presented for the first time to completely optimize the anodic catalyst and electrolyzer operating conditions. First, the electro-oxidation of each molecule was studied using a monometallic (Pt) and two bimetallic (PtNi and PtCo) anodic electrocatalysts supported on graphene nanoplatelets (GNPs). Tests in a three-electrode cell showed superior electrochemical activity and durability of PtNi/GNPs, especially at potentials higher than 1.2 V vs RHE, with the highest electrocatalytic activity in d-xylose electro-oxidation. Then, monometallic (Pt and Ni) and bimetallic electrocatalysts with different Pt:Ni mass ratios (1:1 and 2:1) were studied for d-xylose electro-oxidation, with the 2:1 mass ratio presenting the best results. This electrocatalyst was selected as the most suitable for scale-up to an anion-exchange membrane electrolyzer, where the optimal operating potential was determined. Additionally, stable operating conditions of the electrolyzer were achieved by cyclic H2 production and cathodic regeneration polarization steps. This led to suitable and reproducible H2 production rates throughout the production cycles for renewable hydrogen production from biomass-derived streams.
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Affiliation(s)
- J. Serrano-Jiménez
- Department
of Chemical Engineering, School of Chemical Sciences and Technologies, University of Castilla-La Mancha, Avda. Camilo José Cela 12, E-13071 Ciudad Real, Spain
| | - A.R. de la Osa
- Department
of Chemical Engineering, School of Chemical Sciences and Technologies, University of Castilla-La Mancha, Avda. Camilo José Cela 12, E-13071 Ciudad Real, Spain
| | - P. Sánchez
- Department
of Chemical Engineering, School of Chemical Sciences and Technologies, University of Castilla-La Mancha, Avda. Camilo José Cela 12, E-13071 Ciudad Real, Spain
| | - A. Romero
- Department
of Chemical Engineering, Higher Technical School of Agronomical Engineers, University of Castilla-La Mancha, Ronda de Calatrava 7, E-13071 Ciudad Real, Spain
| | - A. de Lucas-Consuegra
- Department
of Chemical Engineering, School of Chemical Sciences and Technologies, University of Castilla-La Mancha, Avda. Camilo José Cela 12, E-13071 Ciudad Real, Spain
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2
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Kormanyos A, Büttner P, Bosch M, Minichova M, Körner A, Jenewein KJ, Hutzler A, Mayrhofer KJJ, Bachmann J, Cherevko S. Stability of Bimetallic Pt xRu y - From Model Surfaces to Nanoparticulate Electrocatalysts. ACS MATERIALS AU 2024; 4:286-299. [PMID: 38737117 PMCID: PMC11083114 DOI: 10.1021/acsmaterialsau.3c00092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 12/27/2023] [Accepted: 12/27/2023] [Indexed: 05/14/2024]
Abstract
Fundamental research campaigns in electrocatalysis often involve the use of model systems, such as single crystals or magnetron-sputtered thin films (single metals or metal alloys). The downsides of these approaches are that oftentimes only a limited number of compositions are picked and tested (guided by chemical intuition) and that the validity of trends is not verified under operating conditions typically present in real devices. These together can lead to deficient conclusions, hampering the direct application of newly discovered systems in real devices. In this contribution, the stability of magnetron-sputtered bimetallic PtxRuy thin film electrocatalysts (0 at. % to 100 at. % Ru content) along with three commercially available carbon-supported counterparts (50-67 at. % Ru content) was mapped under electrocatalytic conditions in acidic electrolytes using online ICP-MS. We found several differences between the two systems in the amount of metals dissolved along with the development of the morphology and composition. While the Pt-rich PtxRuy compositions remained unchanged, 30-50 nm diameter surface pits were detected in the case of the Ru-rich sputtered thin films. Contrastingly, the surface of the carbon-supported NPs enriched in Pt accompanied by the leaching of a significant amount of Ru from the alloy structure was observed. Change in morphology was accompanied by a mass loss reaching around 1-2 wt % in the case of the sputtered samples and almost 10 wt % for the NPs. Since PtxRuy has prime importance in driving alcohol oxidation reactions, the stability of all investigated alloys was screened in the presence of isopropanol. While Pt dissolution was marginally affected by the presence of isopropanol, several times higher Ru dissolution was detected, especially in the case of the Ru-rich compositions. Our results underline that trends in terms of electrocatalytic activity and stability cannot always be transferred from model samples to systems that are closer to the ones applied in real devices.
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Affiliation(s)
- Attila Kormanyos
- Helmholtz
Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich, Cauerstr. 1, 91058 Erlangen, Germany
- Department
of Physical Chemistry and Materials Science, University of Szeged, Aradi sq. 1, Szeged 6720, Hungary
| | - Pascal Büttner
- Chemistry
of Thin Film Materials, IZNF, Friedrich-Alexander-Universität
Erlangen-Nürnberg (FAU), Cauerstr. 3, 91058 Erlangen, Germany
| | - Michael Bosch
- Chemistry
of Thin Film Materials, IZNF, Friedrich-Alexander-Universität
Erlangen-Nürnberg (FAU), Cauerstr. 3, 91058 Erlangen, Germany
| | - Maria Minichova
- Helmholtz
Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich, Cauerstr. 1, 91058 Erlangen, Germany
- Department
of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany
| | - Andreas Körner
- Helmholtz
Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich, Cauerstr. 1, 91058 Erlangen, Germany
- Department
of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany
| | - Ken J. Jenewein
- Helmholtz
Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich, Cauerstr. 1, 91058 Erlangen, Germany
- Department
of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany
| | - Andreas Hutzler
- Helmholtz
Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich, Cauerstr. 1, 91058 Erlangen, Germany
| | - Karl J. J. Mayrhofer
- Helmholtz
Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich, Cauerstr. 1, 91058 Erlangen, Germany
- Department
of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany
| | - Julien Bachmann
- Chemistry
of Thin Film Materials, IZNF, Friedrich-Alexander-Universität
Erlangen-Nürnberg (FAU), Cauerstr. 3, 91058 Erlangen, Germany
| | - Serhiy Cherevko
- Helmholtz
Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich, Cauerstr. 1, 91058 Erlangen, Germany
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3
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Leon‐Fernandez LF, Dominguez‐Benetton X, Villaseñor Camacho J, Fernandez‐Morales FJ. Coupling the electrocatalytic dechlorination of 2,4-D with electroactive microbial anodes. ENVIRONMENTAL MICROBIOLOGY REPORTS 2023; 15:512-529. [PMID: 37482917 PMCID: PMC10667633 DOI: 10.1111/1758-2229.13187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 07/01/2023] [Indexed: 07/25/2023]
Abstract
This work proves the feasibility of dechlorinating 2,4-D, a customary commercial herbicide, using cathodic electrocatalysis driven by the anodic microbial electrooxidation of sodium acetate. A set of microbial electrochemical systems (MES) were run under two different operating modes, namely microbial fuel cell (MFC) mode, with an external resistance of 120 Ω, or microbial electrolysis cell (MEC) mode, by supplying external voltage (0.6 V) for promoting the (bio)electrochemical reactions taking place. When operating the MES as an MFC, 32% dechlorination was obtained after 72 h of treatment, which was further enhanced by working under MEC mode and achieving a 79% dechlorination. In addition, the biodegradability (expressed as the ratio BOD/COD) of the synthetic polluted wastewater was tested prior and after the MES treatment, which was improved from negative values (corresponding to toxic effluents) up to 0.135 in the MFC and 0.453 in the MEC. Our MES approach proves to be a favourable option from the point of view of energy consumption. Running the system under MFC mode allowed to co-generate energy along the dechlorination process (-0.0120 kWh mol-1 ), even though low removal rates were attained. The energy input under MEC operation was 1.03 kWh mol-1 -a competitive value compared to previous works reported in the literature for (non-biological) electrochemical reactors for 2,4-D electrodechlorination.
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Affiliation(s)
- Luis F. Leon‐Fernandez
- Chemical Engineering Department, ITQUIMAUniversity of Castilla‐La ManchaCiudad RealSpain
- Separation and Conversion TechnologiesFlemish Institute for Technological Research (VITO)MolBelgium
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4
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Linge J, Briega-Martos V, Hutzler A, Fritsch B, Erikson H, Tammeveski K, Cherevko S. Stability of Carbon Supported Silver Electrocatalysts for Alkaline Oxygen Reduction and Evolution Reactions. ACS APPLIED ENERGY MATERIALS 2023; 6:11497-11509. [PMID: 38037630 PMCID: PMC10685861 DOI: 10.1021/acsaem.3c01717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 09/15/2023] [Accepted: 10/20/2023] [Indexed: 12/02/2023]
Abstract
Ag-based electrocatalysts are promising candidates to catalyze the sluggish oxygen reduction reaction (ORR) in anion exchange membrane fuel cells (AEMFC) and oxygen evolution reaction (OER) in unitized regenerative fuel cells. However, to be competitive with existing technologies, the AEMFC with Ag electrocatalyst must demonstrate superior performance and long-term durability. The latter implies that the catalyst must be stable, withstanding harsh oxidizing conditions. Moreover, since Ag is typically supported by carbon, the strict stability requirements extend to the whole Ag/C catalyst. In this work, Ag supported on Vulcan carbon (Ag/VC) and mesoporous carbon (Ag/MC) materials is synthesized, and their electrochemical stability is studied using a family of complementary techniques. We first employ an online scanning flow cell combined with inductively coupled plasma mass spectrometry (SFC-ICP-MS) to estimate the kinetic dissolution stability window of Ag. Strong correlations between voltammetric features and the dissolution processes are discovered. Very high silver dissolution during the OER renders this material impractical for regenerative fuel cell applications. To address Ag stability during AEMFC load cycles, accelerated stress tests (ASTs) in O2-saturated solutions are carried out in rotating disk electrode (RDE) and rotating ring-disk electrode (RRDE) setups. Besides tracking the ORR performance evolution, an ex situ long-term Ag dissolution study is performed. Moreover, morphological changes in the catalyst/support are tracked by identical-location transmission electron microscopy (RDE-IL-TEM). Voltammetry analysis before and after AST reveals a smaller change in ORR activity for Ag/MC, confirming its higher stability. RRDE results reveal a higher increase in the H2O2 yield for Ag/VC after the ASTs. The RDE-IL-TEM measurements demonstrate different degradation processes that can explain the changes in the long term performance. The results in this work point out that the stability of carbon-supported Ag catalysts depends strongly on the morphology of the Ag nanoparticles, which, in turn, can be tuned depending on the chosen carbon support and synthesis method.
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Affiliation(s)
- Jonas
Mart Linge
- Institute
of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia
| | - Valentín Briega-Martos
- Helmholtz
Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, Cauerstrasse 1, 91058 Erlangen, Germany
| | - Andreas Hutzler
- Helmholtz
Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, Cauerstrasse 1, 91058 Erlangen, Germany
| | - Birk Fritsch
- Helmholtz
Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, Cauerstrasse 1, 91058 Erlangen, Germany
| | - Heiki Erikson
- Institute
of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia
| | - Kaido Tammeveski
- Institute
of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia
| | - Serhiy Cherevko
- Helmholtz
Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, Cauerstrasse 1, 91058 Erlangen, Germany
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5
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Kawashima K, Márquez RA, Smith LA, Vaidyula RR, Carrasco-Jaim OA, Wang Z, Son YJ, Cao CL, Mullins CB. A Review of Transition Metal Boride, Carbide, Pnictide, and Chalcogenide Water Oxidation Electrocatalysts. Chem Rev 2023. [PMID: 37967475 DOI: 10.1021/acs.chemrev.3c00005] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2023]
Abstract
Transition metal borides, carbides, pnictides, and chalcogenides (X-ides) have emerged as a class of materials for the oxygen evolution reaction (OER). Because of their high earth abundance, electrical conductivity, and OER performance, these electrocatalysts have the potential to enable the practical application of green energy conversion and storage. Under OER potentials, X-ide electrocatalysts demonstrate various degrees of oxidation resistance due to their differences in chemical composition, crystal structure, and morphology. Depending on their resistance to oxidation, these catalysts will fall into one of three post-OER electrocatalyst categories: fully oxidized oxide/(oxy)hydroxide material, partially oxidized core@shell structure, and unoxidized material. In the past ten years (from 2013 to 2022), over 890 peer-reviewed research papers have focused on X-ide OER electrocatalysts. Previous review papers have provided limited conclusions and have omitted the significance of "catalytically active sites/species/phases" in X-ide OER electrocatalysts. In this review, a comprehensive summary of (i) experimental parameters (e.g., substrates, electrocatalyst loading amounts, geometric overpotentials, Tafel slopes, etc.) and (ii) electrochemical stability tests and post-analyses in X-ide OER electrocatalyst publications from 2013 to 2022 is provided. Both mono and polyanion X-ides are discussed and classified with respect to their material transformation during the OER. Special analytical techniques employed to study X-ide reconstruction are also evaluated. Additionally, future challenges and questions yet to be answered are provided in each section. This review aims to provide researchers with a toolkit to approach X-ide OER electrocatalyst research and to showcase necessary avenues for future investigation.
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Affiliation(s)
- Kenta Kawashima
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Raúl A Márquez
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Lettie A Smith
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Rinish Reddy Vaidyula
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Omar A Carrasco-Jaim
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Ziqing Wang
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Yoon Jun Son
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Chi L Cao
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - C Buddie Mullins
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
- Center for Electrochemistry, The University of Texas at Austin, Austin, Texas 78712, United States
- H2@UT, The University of Texas at Austin, Austin, Texas 78712, United States
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6
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Kormányos A, Dong Q, Xiao B, Li T, Savan A, Jenewein K, Priamushko T, Körner A, Böhm T, Hutzler A, Hu L, Ludwig A, Cherevko S. Stability of high-entropy alloys under electrocatalytic conditions. iScience 2023; 26:107775. [PMID: 37736046 PMCID: PMC10509299 DOI: 10.1016/j.isci.2023.107775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 08/16/2023] [Accepted: 08/28/2023] [Indexed: 09/23/2023] Open
Abstract
High-entropy alloys are claimed to possess superior stability due to thermodynamic contributions. However, this statement mostly lies on a hypothetical basis. In this study, we use on-line inductively coupled plasma mass spectrometer to investigate the dissolution of five representative electrocatalysts in acidic and alkaline media and a wide potential window targeting the most important applications. To address both model and applied systems, we synthesized thin films and carbon-supported nanoparticles ranging from an elemental (Pt) sample to binary (PtRu), ternary (PtRuIr), quaternary (PtRuIrRh), and quinary (PtRuIrRhPd) alloy samples. For certain metals in the high-entropy alloy under alkaline conditions, lower dissolution was observed. Still, the improvement was not striking and can be rather explained by the lowered concentration of elements in the multinary alloys instead of the synergistic effects of thermodynamics. We postulate that this is because of dissolution kinetic effects, which are always present under electrocatalytic conditions, overcompensating thermodynamic contributions.
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Affiliation(s)
- Attila Kormányos
- Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Cauerstraße 1, 91058 Erlangen, Germany
- Department of Physical Chemistry and Materials Science, University of Szeged, Aradi sq. 1, 6720 Szeged, Hungary
| | - Qi Dong
- Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742, United States
| | - Bin Xiao
- Materials Discovery and Interfaces, Institute for Materials, Ruhr-Universität Bochum, 44801 Bochum, Germany
| | - Tangyuan Li
- Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742, United States
| | - Alan Savan
- Materials Discovery and Interfaces, Institute for Materials, Ruhr-Universität Bochum, 44801 Bochum, Germany
| | - Ken Jenewein
- Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Cauerstraße 1, 91058 Erlangen, Germany
- Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany
| | - Tatiana Priamushko
- Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Cauerstraße 1, 91058 Erlangen, Germany
| | - Andreas Körner
- Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Cauerstraße 1, 91058 Erlangen, Germany
| | - Thomas Böhm
- Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Cauerstraße 1, 91058 Erlangen, Germany
| | - Andreas Hutzler
- Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Cauerstraße 1, 91058 Erlangen, Germany
| | - Liangbing Hu
- Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742, United States
- Center for Materials Innovation, University of Maryland, College Park, MD 20742, United States
| | - Alfred Ludwig
- Materials Discovery and Interfaces, Institute for Materials, Ruhr-Universität Bochum, 44801 Bochum, Germany
| | - Serhiy Cherevko
- Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Cauerstraße 1, 91058 Erlangen, Germany
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7
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Vega-Paredes M, Aymerich-Armengol R, Arenas Esteban D, Martí-Sánchez S, Bals S, Scheu C, Garzón Manjón A. Electrochemical Stability of Rhodium-Platinum Core-Shell Nanoparticles: An Identical Location Scanning Transmission Electron Microscopy Study. ACS NANO 2023; 17:16943-16951. [PMID: 37602824 PMCID: PMC10510721 DOI: 10.1021/acsnano.3c04039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 08/16/2023] [Indexed: 08/22/2023]
Abstract
Rhodium-platinum core-shell nanoparticles on a carbon support (Rh@Pt/C NPs) are promising candidates as anode catalysts for polymer electrolyte membrane fuel cells. However, their electrochemical stability needs to be further explored for successful application in commercial fuel cells. Here we employ identical location scanning transmission electron microscopy to track the morphological and compositional changes of Rh@Pt/C NPs during potential cycling (10 000 cycles, 0.06-0.8 VRHE, 0.5 H2SO4) down to the atomic level, which are then used for understanding the current evolution occurring during the potential cycles. Our results reveal a high stability of the Rh@Pt/C system and point toward particle detachment from the carbon support as the main degradation mechanism.
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Affiliation(s)
- Miquel Vega-Paredes
- Max-Planck-Institut
für Eisenforschung GmbH (MPIE), Max-Planck-Straße 1, 40237 Düsseldorf, Germany
| | - Raquel Aymerich-Armengol
- Max-Planck-Institut
für Eisenforschung GmbH (MPIE), Max-Planck-Straße 1, 40237 Düsseldorf, Germany
| | - Daniel Arenas Esteban
- Electron
Microscopy for Materials Science (EMAT), University of Antwerp, 2020 Antwerp, Belgium
| | - Sara Martí-Sánchez
- Catalan
Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, 08193 Bellaterra, Spain
| | - Sara Bals
- Electron
Microscopy for Materials Science (EMAT), University of Antwerp, 2020 Antwerp, Belgium
| | - Christina Scheu
- Max-Planck-Institut
für Eisenforschung GmbH (MPIE), Max-Planck-Straße 1, 40237 Düsseldorf, Germany
| | - Alba Garzón Manjón
- Max-Planck-Institut
für Eisenforschung GmbH (MPIE), Max-Planck-Straße 1, 40237 Düsseldorf, Germany
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8
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Ehsan MA, Khan A, Suliman MH, Javid M. Facile deposition of FeNi/Ni hybrid nanoflower electrocatalysts for effective and sustained water oxidation. NANOSCALE ADVANCES 2023; 5:5122-5130. [PMID: 37705797 PMCID: PMC10496914 DOI: 10.1039/d3na00298e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 08/22/2023] [Indexed: 09/15/2023]
Abstract
Bimetallic iron-nickel (FeNi) compounds are widely studied materials for the oxygen evolution reaction (OER) owing to their high electrocatalytic performance and low cost. In this work, we produced thin films of the FeNi alloy on nickel foam (NF) by using an aerosol-assisted chemical deposition (AACVD) method and examined their OER catalytic activity. The hybrid FeNi/Ni catalysts obtained after 1 and 2 h of AACVD deposition show improved charge transfer and kinetics for the OER due to the strong interface between the FeNi alloy and Ni support. The FeNi/Ni-2h catalyst has higher catalytic activity than the FeNi/Ni-1h catalyst because of its nanoflower morphology that provides a large surface area and numerous active sites for the OER. Therefore, the FeNi/Ni-2h catalyst exhibits low overpotentials of 300 and 340 mV at 50 and 500 mA cm-2 respectively, and excellent stability over 100 h, and ∼0% loss after 5000 cycles in 1 M KOH electrolyte. Furthermore, this catalyst has a small Tafel slope, low charge transfer resistance and high current exchange density and thus surpasses the benchmark IrO2 catalyst. The easy, simple, and scalable AACVD method is an effective way to develop thin film electrocatalysts with high activity and stability.
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Affiliation(s)
- Muhammad Ali Ehsan
- Interdisciplinary Research Center for Hydrogen and Energy Storage (IRC-HES) Saudi Arabia
| | - Abuzar Khan
- Interdisciplinary Research Center for Hydrogen and Energy Storage (IRC-HES) Saudi Arabia
| | - Munzir H Suliman
- Interdisciplinary Research Center for Hydrogen and Energy Storage (IRC-HES) Saudi Arabia
| | - Mohamed Javid
- Core Research Facilities, King Fahd University of Petroleum & Minerals Box 5040 Dhahran 31261 Saudi Arabia
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9
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Wei M, Chen L, Wang X, Zhu A, Zhang Q, Liu Q. Tubular palladium-based catalysts enhancing direct ethanol electrooxidation. J Colloid Interface Sci 2023; 633:932-947. [PMID: 36509037 DOI: 10.1016/j.jcis.2022.11.154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 11/29/2022] [Accepted: 11/30/2022] [Indexed: 12/12/2022]
Abstract
Direct ethanol fuel cell (DEFC) has the advantages of high power density, high energy conversion efficiency and environmental friendliness, but its commercialization is restricted by factors such as insufficient activity and low anti-poisoning ability of anode catalyst for incomplete oxidation of ethanol. It is of great significance to design and prepare anode catalyst with high activity and high anti-poisoning ability that can be recycled. In this work, tubular palladium-based (Pd-based) catalysts with abundant lattice defect sites were prepared by simple and reproducible electro-displacement reactions using Cu nanowires as sacrificial template. Pd is the main catalytic element which provides adsorption sites for ethanol oxidation. Ag and Cu introduced facilitates the formation of hydroxyl groups to oxidize toxicity intermediates, and changes the d-band center position of Pd, so as to adjust the adsorption and desorption of ethanol and its intermediates on the Pd surface. At the same time, Au introduced with high potential maintains the stability of the catalyst structure. The tubular structure exposes more active sites, improves the atomic utilization rate and enhances the ability of the catalyst resisting dissolution and aggregation. The series of PdAuAgCu tubular catalysts with outer layer dendrites were prepared by electro-displacement reactions using the mixture (ethylene glycol : ultra-pure water = 3 : 1) as the reaction solvent and fivefold twinned Cu nanowires as sacrificial template. The performance evaluation of ethanol electrocatalytic oxidation showed that the Pd17Au40Ag11Cu32 tubular catalysts were prepared at 120 °C and 10 mM CTAB had excellent overall performance, with a peak mass activity of 6335 mA mgPd-1, which was 9.6 times of Pd/C (JM). The residual current density after the stability test of 3000 s was 249 mA mgPd-1, which was 3.3 times of Pd/C (JM).
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Affiliation(s)
- Mingxin Wei
- Department of Chemical & Biochemical Engineering, College of Chemistry & Chemical Engineering, Xiamen University, Xiamen 361005, PR China.
| | - Lianjin Chen
- Department of Chemical & Biochemical Engineering, College of Chemistry & Chemical Engineering, Xiamen University, Xiamen 361005, PR China.
| | - Xiaosen Wang
- Department of Chemical & Biochemical Engineering, College of Chemistry & Chemical Engineering, Xiamen University, Xiamen 361005, PR China.
| | - Aimei Zhu
- Department of Chemical & Biochemical Engineering, College of Chemistry & Chemical Engineering, Xiamen University, Xiamen 361005, PR China.
| | - Qiugen Zhang
- Department of Chemical & Biochemical Engineering, College of Chemistry & Chemical Engineering, Xiamen University, Xiamen 361005, PR China.
| | - Qinglin Liu
- Department of Chemical & Biochemical Engineering, College of Chemistry & Chemical Engineering, Xiamen University, Xiamen 361005, PR China.
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10
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Faverge T, Gilles B, Bonnefont A, Maillard F, Coutanceau C, Chatenet M. In Situ Investigation of d-Glucose Oxidation into Value-Added Products on Au, Pt, and Pd under Alkaline Conditions: A Comparative Study. ACS Catal 2023. [DOI: 10.1021/acscatal.2c05871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Affiliation(s)
- Théo Faverge
- Université de Poitiers, IC2MP, UMR CNRS 7285, 4 Rue Michel Brunet, 86073 Cedex 9 Poitiers, France
- Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, Grenoble INP, LEPMI, 38000Grenoble, France
| | - Bruno Gilles
- Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, Grenoble INP, SIMAP, 38000 Grenoble, France
| | - Antoine Bonnefont
- Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, Grenoble INP, LEPMI, 38000Grenoble, France
- French Research Network on Hydrogen (FRH2), Research Federation No. 2044 CNRS, France,
| | - Frédéric Maillard
- Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, Grenoble INP, LEPMI, 38000Grenoble, France
- French Research Network on Hydrogen (FRH2), Research Federation No. 2044 CNRS, France,
| | - Christophe Coutanceau
- Université de Poitiers, IC2MP, UMR CNRS 7285, 4 Rue Michel Brunet, 86073 Cedex 9 Poitiers, France
- French Research Network on Hydrogen (FRH2), Research Federation No. 2044 CNRS, France,
| | - Marian Chatenet
- Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, Grenoble INP, LEPMI, 38000Grenoble, France
- French Research Network on Hydrogen (FRH2), Research Federation No. 2044 CNRS, France,
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11
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Kim JK, Kim S, Kim S, Kim HJ, Kim K, Jung W, Han JW. Dynamic Surface Evolution of Metal Oxides for Autonomous Adaptation to Catalytic Reaction Environments. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2203370. [PMID: 35738568 DOI: 10.1002/adma.202203370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 06/21/2022] [Indexed: 06/15/2023]
Abstract
Metal oxides possessing distinctive physical/chemical properties due to different crystal structures and stoichiometries play a pivotal role in numerous current technologies, especially heterogeneous catalysis for production/conversion of high-valued chemicals and energy. To date, many researchers have investigated the effect of the structure and composition of these materials on their reactivity to various chemical and electrochemical reactions. However, metal oxide surfaces evolve from their initial form under dynamic reaction conditions due to the autonomous behaviors of the constituent atoms to adapt to the surrounding environment. Such nanoscale surface phenomena complicate reaction mechanisms and material properties, interrupting the clarification of the origin of functionality variations in reaction environments. In this review, the current findings on the spontaneous surface reorganization of metal oxides during reactions are categorized into three types: 1) the appearance of nano-sized second phase from oxides, 2) the (partial) encapsulation of oxide atoms toward supported metal surfaces, and 3) the oxide surface reconstruction with selective cation leaching in aqueous solution. Then their effects on each reaction are summarized in terms of activity and stability, providing novel insight for those who design metal-oxide-based catalytic materials.
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Affiliation(s)
- Jun Kyu Kim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - Sangwoo Kim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - Seunghyun Kim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - Hyung Jun Kim
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, 37673, South Korea
| | - Kyeounghak Kim
- Department of Chemical Engineering, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul, 04763, South Korea
| | - WooChul Jung
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - Jeong Woo Han
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, 37673, South Korea
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12
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Li FM, Huang L, Zaman S, Guo W, Liu H, Guo X, Xia BY. Corrosion Chemistry of Electrocatalysts. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2200840. [PMID: 35334145 DOI: 10.1002/adma.202200840] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 03/23/2022] [Indexed: 06/14/2023]
Abstract
Electrocatalysts are the core components of many sustainable energy conversion technologies that are considered the most potential solution to the worldwide energy and environmental crises. The reliability of structure and composition pledges that electrocatalysts can achieve predictable and stable performance. However, during the electrochemical reaction, electrocatalysts are influenced directly by the applied potential, the electrolyte, and the adsorption/desorption of reactive species, triggering structural and compositional corrosion, which directly affects the catalytic behaviors of electrocatalysts (performance degradation or enhancement) and invalidates the established structure-activity relationship. Therefore, it is necessary to elucidate the corrosion behavior and mechanism of electrocatalysts to formulate targeted corrosion-resistant strategies or use corrosion reconstruction synthesis techniques to guide the preparation of efficient and stable electrocatalysts. Herein, the most recent developments in electrocatalyst corrosion chemistry are outlined, including corrosion mechanisms, mitigation strategies, and corrosion syntheses/reconstructions based on typical materials and important electrocatalytic reactions. Finally, potential opportunities and challenges are also proposed to foresee the possible development in this field. It is believed that this contribution will raise more awareness regarding nanomaterial corrosion chemistry in energy technologies and beyond.
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Affiliation(s)
- Fu-Min Li
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education), Hubei Key Laboratory of Material Chemistry and Service Failure, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan, 430074, China
| | - Lei Huang
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education), Hubei Key Laboratory of Material Chemistry and Service Failure, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan, 430074, China
| | - Shahid Zaman
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education), Hubei Key Laboratory of Material Chemistry and Service Failure, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan, 430074, China
| | - Wei Guo
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education), Hubei Key Laboratory of Material Chemistry and Service Failure, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan, 430074, China
| | - Hongfang Liu
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education), Hubei Key Laboratory of Material Chemistry and Service Failure, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan, 430074, China
| | - Xingpeng Guo
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education), Hubei Key Laboratory of Material Chemistry and Service Failure, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan, 430074, China
| | - Bao Yu Xia
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education), Hubei Key Laboratory of Material Chemistry and Service Failure, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan, 430074, China
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13
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Sgarbi R, Doan H, Martin V, Chatenet M. Tailoring the Durability of Carbon-Coated Pd Catalysts Towards Hydrogen Oxidation Reaction (HOR) in Alkaline Media. Electrocatalysis (N Y) 2022. [DOI: 10.1007/s12678-022-00794-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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14
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Xiao F, Wang Y, Xu GL, Yang F, Zhu S, Sun CJ, Cui Y, Xu Z, Zhao Q, Jang J, Qiu X, Liu E, Drisdell WS, Wei Z, Gu M, Amine K, Shao M. Fe–N–C Boosts the Stability of Supported Platinum Nanoparticles for Fuel Cells. J Am Chem Soc 2022; 144:20372-20384. [DOI: 10.1021/jacs.2c08305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fei Xiao
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon999077, Hong Kong, China
| | - Yian Wang
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon999077, Hong Kong, China
| | - Gui-Liang Xu
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois60439, United States
| | - Fei Yang
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon999077, Hong Kong, China
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen518055, China
| | - Shangqian Zhu
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon999077, Hong Kong, China
| | - Cheng-Jun Sun
- X-ray Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois60439, United States
| | - Yingdan Cui
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon999077, Hong Kong, China
| | - Zhiwen Xu
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon999077, Hong Kong, China
| | - Qinglan Zhao
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon999077, Hong Kong, China
| | - Juhee Jang
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon999077, Hong Kong, China
| | - Xiaoyi Qiu
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon999077, Hong Kong, China
| | - Ershuai Liu
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California94720, United States
| | - Walter S. Drisdell
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California94720, United States
| | - Zidong Wei
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing400044, China
| | - Meng Gu
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen518055, China
| | - Khalil Amine
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois60439, United States
- Department of Materials Science and Engineering, Stanford University, Stanford, California94305, United States
- Materials Science and Nano-engineering, Mohammed VI Polytechnic University, Ben Guerir43150, Morocco
- Institute for Research & Medical Consultations, Imam Abdulrahman Bin Faisal University (IAU), Dammam34221, Saudi Arabia
| | - Minhua Shao
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon999077, Hong Kong, China
- Fok Ying Tung Research Institute, The Hong Kong University of Science and Technology, Guangzhou511458, China
- Energy Institute, Hong Kong Brach of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), and Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon999077, Hong Kong, China
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15
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Montserrat-Sisó G, Wickman B. PdNi thin films for hydrogen oxidation reaction and oxygen reduction reaction in alkaline media. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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16
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Berretti E, Pagliaro M, Giaccherini A, Montegrossi G, Di Benedetto F, Lepore G, D'Acapito F, Vizza F, Lavacchi A. Experimental evidence of palladium dissolution in anodes for alkaline direct ethanol and formate fuel cells. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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17
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Zerdoumi R, Matselko O, Rößner L, Sarkar B, Grin Y, Armbrüster M. Disentangling Electronic and Geometric Effects in Electrocatalysis through Substitution in Isostructural Intermetallic Compounds. J Am Chem Soc 2022; 144:8379-8388. [PMID: 35485643 DOI: 10.1021/jacs.2c03348] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Efficient development of catalytic materials requires knowledge of the decisive parameters defining the catalytic properties. In multicomponent metallic catalysts, these are categorized as electronic and geometric effects, yet they are strongly interrelated. A systematic disentanglement can be achieved by fixing one parameter while altering the other, which becomes possible through the substitution in isostructural intermetallic compounds. This approach enables the evaluation of electronic or geometric contributions both individually and combined. Herein, this is achieved by substitution of indium (three valence electrons) with tin (four valence electrons) in the series In1-xSnxPd2, which allows for a systematic variation of the total number of electrons per unit cell with only a minor variation of the unit cell parameters and thus the evaluation of the electronic effect. Geometric effects were evaluated by substitution of indium with gallium in the Ga1-xInxPd2 series, which allows for a systematic variation of the interatomic distances while maintaining the same number of valence electrons per unit cell and close atomic coordinates. By substituting gallium with tin in the Ga1-xSnxPd2 series, both effects are combined and addressed simultaneously. The activity enhancement of the methanol oxidation reaction on the Ga1-xSnxPd2 series is attributed to the synergy of the combined effects.
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Affiliation(s)
- Ridha Zerdoumi
- Faculty of Natural Sciences, Institute of Chemistry, Materials for Innovative Energy Concepts, Chemnitz University of Technology, 09107 Chemnitz, Germany
| | - Oksana Matselko
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany.,Department of Inorganic Chemistry, Ivan Franko National University of Lviv, Kyryla i Mefodiya Street 6, 79005 Lviv, Ukraine
| | - Leonard Rößner
- Faculty of Natural Sciences, Institute of Chemistry, Materials for Innovative Energy Concepts, Chemnitz University of Technology, 09107 Chemnitz, Germany
| | - Bidushi Sarkar
- Faculty of Natural Sciences, Institute of Chemistry, Materials for Innovative Energy Concepts, Chemnitz University of Technology, 09107 Chemnitz, Germany
| | - Yuri Grin
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany
| | - Marc Armbrüster
- Faculty of Natural Sciences, Institute of Chemistry, Materials for Innovative Energy Concepts, Chemnitz University of Technology, 09107 Chemnitz, Germany
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18
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Abstract
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This Review provides an overview
of the emerging concepts of catalysts,
membranes, and membrane electrode assemblies (MEAs) for water electrolyzers
with anion-exchange membranes (AEMs), also known as zero-gap alkaline
water electrolyzers. Much of the recent progress is due to improvements
in materials chemistry, MEA designs, and optimized operation conditions.
Research on anion-exchange polymers (AEPs) has focused on the cationic
head/backbone/side-chain structures and key properties such as ionic
conductivity and alkaline stability. Several approaches, such as cross-linking,
microphase, and organic/inorganic composites, have been proposed to
improve the anion-exchange performance and the chemical and mechanical
stability of AEMs. Numerous AEMs now exceed values of 0.1 S/cm (at
60–80 °C), although the stability specifically at temperatures
exceeding 60 °C needs further enhancement. The oxygen evolution
reaction (OER) is still a limiting factor. An analysis of thin-layer
OER data suggests that NiFe-type catalysts have the highest activity.
There is debate on the active-site mechanism of the NiFe catalysts,
and their long-term stability needs to be understood. Addition of
Co to NiFe increases the conductivity of these catalysts. The same
analysis for the hydrogen evolution reaction (HER) shows carbon-supported
Pt to be dominating, although PtNi alloys and clusters of Ni(OH)2 on Pt show competitive activities. Recent advances in forming
and embedding well-dispersed Ru nanoparticles on functionalized high-surface-area
carbon supports show promising HER activities. However, the stability
of these catalysts under actual AEMWE operating conditions needs to
be proven. The field is advancing rapidly but could benefit through
the adaptation of new in situ techniques, standardized evaluation
protocols for AEMWE conditions, and innovative catalyst-structure
designs. Nevertheless, single AEM water electrolyzer cells have been
operated for several thousand hours at temperatures and current densities
as high as 60 °C and 1 A/cm2, respectively.
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Affiliation(s)
- Naiying Du
- National Research Council of Canada, 1200 Montreal Road, Ottawa, Ontario K1A 0R6, Canada.,Energy, Mining and Environment Research Centre, 1200 Montreal Road, Ottawa, Ontario K1A 0R6, Canada
| | - Claudie Roy
- Energy, Mining and Environment Research Centre, 1200 Montreal Road, Ottawa, Ontario K1A 0R6, Canada.,National Research Council of Canada, 2620 Speakman Drive, Mississauga, Ontario L5K 1B1, Canada
| | - Retha Peach
- Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Cauerstaße 1, 91058 Erlangen, Germany
| | - Matthew Turnbull
- National Research Council of Canada, 1200 Montreal Road, Ottawa, Ontario K1A 0R6, Canada.,Energy, Mining and Environment Research Centre, 1200 Montreal Road, Ottawa, Ontario K1A 0R6, Canada
| | - Simon Thiele
- Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Cauerstaße 1, 91058 Erlangen, Germany.,Department Chemie- und Bioingenieurwesen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany
| | - Christina Bock
- National Research Council of Canada, 1200 Montreal Road, Ottawa, Ontario K1A 0R6, Canada.,Energy, Mining and Environment Research Centre, 1200 Montreal Road, Ottawa, Ontario K1A 0R6, Canada
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19
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Doering M, Kieninger J, Urban G, Weltin A. Electrochemical microelectrode degradation monitoring: in situ investigation of platinum corrosion at neutral pH. J Neural Eng 2022; 19. [PMID: 34983028 DOI: 10.1088/1741-2552/ac47da] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 01/04/2022] [Indexed: 11/11/2022]
Abstract
OBJECTIVE The stability of platinum and other noble metal electrodes is critical for neural implants, electrochemical sensors, and energy sources. Beyond the acidic or alkaline environment found in most electrochemical studies, the investigation of electrode corrosion in neutral pH and chloride containing electrolytes is essential, particularly regarding the long-term stability of neural interfaces, such as brain stimulation electrodes or cochlear implants. In addition, the increased use of microfabricated devices demands the investigation of thin-film electrode stability. APPROACH We developed a procedure of electrochemical methods for continuous tracking of electrode degradation in situ over the complete life cycle of platinum thin-film microelectrodes in a unique combination with simultaneous chemical sensing. We used chronoamperometry and cyclic voltammetry to measure electrode surface and analyte redox processes, together with accelerated electrochemical degradation. MAIN RESULTS We compared degradation between thin-film microelectrodes and bulk electrodes, neutral to acidic pH, different pulsing schemes, and the presence of the redox active species oxygen and hydrogen peroxide. Results were confirmed by mechanical profilometry and microscopy to determine material changes on a nanometer scale. We found that electrode degradation is mainly driven by repeated formation and removal of the platinum surface oxide, also within the electrochemical stability window of water. There was no considerable difference between thin-film micro- and macroscopic bulk electrodes or in the presence of reactive species, whereas acidic pH or extending the potential window led to increased degradation. SIGNIFICANCE Our results provide valuable fundamental information on platinum microelectrode degradation under conditions found in biomedical applications. For the first time, we deployed a unified method to report quantitative data on electrode degradation up to a defined endpoint. Our method is a widely applicable framework for comparative long-term studies of sensor and neural interface stability.
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Affiliation(s)
- Moritz Doering
- University of Freiburg, Georges-Köhler-Allee 103, Freiburg im Breisgau, Baden-Württemberg, 79110, GERMANY
| | - Jochen Kieninger
- University of Freiburg, Georges-Köhler-Allee 103, Freiburg im Breisgau, Baden-Württemberg, 79110, GERMANY
| | - Gerald Urban
- Department of Microsystems Engineering, Albert-Ludwigs-Universitat Freiburg, Georges-Köhler-Allee 103, Freiburg im Breisgau, 79110, GERMANY
| | - Andreas Weltin
- IMTEK - Department of Microsystems Engineering, University of Freiburg, Georges-Köhler-Allee 103, Freiburg im Breisgau, 79110, GERMANY
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20
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Hornberger E, Klingenhof M, Polani S, Paciok P, Kormányos A, Chattot R, MacArthur KE, Wang X, Pan L, Drnec J, Cherevko S, Heggen M, Dunin-Borkowski RE, Strasser P. On the electrocatalytical oxygen reduction reaction activity and stability of quaternary RhMo-doped PtNi/C octahedral nanocrystals. Chem Sci 2022; 13:9295-9304. [PMID: 36093024 PMCID: PMC9384817 DOI: 10.1039/d2sc01585d] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 07/01/2022] [Indexed: 12/01/2022] Open
Abstract
Recently proposed bimetallic octahedral Pt–Ni electrocatalysts for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cell (PEMFC) cathodes suffer from particle instabilities in the form of Ni corrosion and shape degradation. Advanced trimetallic Pt-based electrocatalysts have contributed to their catalytic performance and stability. In this work, we propose and analyse a novel quaternary octahedral (oh-)Pt nanoalloy concept with two distinct metals serving as stabilizing surface dopants. An efficient solvothermal one-pot strategy was developed for the preparation of shape-controlled oh-PtNi catalysts doped with Rh and Mo in its surface. The as-prepared quaternary octahedral PtNi(RhMo) catalysts showed exceptionally high ORR performance accompanied by improved activity and shape integrity after stability tests compared to previously reported bi- and tri-metallic systems. Synthesis, performance characteristics and degradation behaviour are investigated targeting deeper understanding for catalyst system improvement strategies. A number of different operando and on-line analysis techniques were employed to monitor the structural and elemental evolution, including identical location scanning transmission electron microscopy and energy dispersive X-ray analysis (IL-STEM-EDX), operando wide angle X-ray spectroscopy (WAXS), and on-line scanning flow cell inductively coupled plasma mass spectrometry (SFC-ICP-MS). Our studies show that doping PtNi octahedral catalysts with small amounts of Rh and Mo suppresses detrimental Pt diffusion and thus offers an attractive new family of shaped Pt alloy catalysts for deployment in PEMFC cathode layers. PtNi nano-octahedra with Rh and Mo dopants are highly active catalysts for the oxygen reduction reaction with excellent stability and shape integrity. We investigate the morphological, structural, and compositional evolution during stability testing.![]()
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Affiliation(s)
- Elisabeth Hornberger
- Electrochemical Energy, Catalysis and Material Science Laboratory, Department of Chemistry, Technische Universität Berlin, 10623 Berlin, Germany
| | - Malte Klingenhof
- Electrochemical Energy, Catalysis and Material Science Laboratory, Department of Chemistry, Technische Universität Berlin, 10623 Berlin, Germany
| | - Shlomi Polani
- Electrochemical Energy, Catalysis and Material Science Laboratory, Department of Chemistry, Technische Universität Berlin, 10623 Berlin, Germany
| | - Paul Paciok
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Peter Grünberg Institute, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Attila Kormányos
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, 91058 Erlangen, Germany
| | - Raphaël Chattot
- ID 31 Beamline, BP 220, European Synchrotron Radiation Facility, 38043 Grenoble, France
| | - Katherine E. MacArthur
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Peter Grünberg Institute, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Xingli Wang
- Electrochemical Energy, Catalysis and Material Science Laboratory, Department of Chemistry, Technische Universität Berlin, 10623 Berlin, Germany
| | - Lujin Pan
- Electrochemical Energy, Catalysis and Material Science Laboratory, Department of Chemistry, Technische Universität Berlin, 10623 Berlin, Germany
| | - Jakub Drnec
- ID 31 Beamline, BP 220, European Synchrotron Radiation Facility, 38043 Grenoble, France
| | - Serhiy Cherevko
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, 91058 Erlangen, Germany
| | - Marc Heggen
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Peter Grünberg Institute, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Rafal E. Dunin-Borkowski
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Peter Grünberg Institute, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Peter Strasser
- Electrochemical Energy, Catalysis and Material Science Laboratory, Department of Chemistry, Technische Universität Berlin, 10623 Berlin, Germany
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21
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Structural evolution of Pt-based oxygen reduction reaction electrocatalysts. CHINESE JOURNAL OF CATALYSIS 2022. [DOI: 10.1016/s1872-2067(21)63896-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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22
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Vass Á, Endrődi B, Samu GF, Balog Á, Kormányos A, Cherevko S, Janáky C. Local Chemical Environment Governs Anode Processes in CO 2 Electrolyzers. ACS ENERGY LETTERS 2021; 6:3801-3808. [PMID: 34796265 PMCID: PMC8593866 DOI: 10.1021/acsenergylett.1c01937] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 10/01/2021] [Indexed: 05/20/2023]
Abstract
A major goal within the CO2 electrolysis community is to replace the generally used Ir anode catalyst with a more abundant material, which is stable and active for water oxidation under process conditions. Ni is widely applied in alkaline water electrolysis, and it has been considered as a potential anode catalyst in CO2 electrolysis. Here we compare the operation of electrolyzer cells with Ir and Ni anodes and demonstrate that, while Ir is stable under process conditions, the degradation of Ni leads to a rapid cell failure. This is caused by two parallel mechanisms: (i) a pH decrease of the anolyte to a near neutral value and (ii) the local chemical environment developing at the anode (i.e., high carbonate concentration). The latter is detrimental for zero-gap electrolyzer cells only, but the first mechanism is universal, occurring in any kind of CO2 electrolyzer after prolonged operation with recirculated anolyte.
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Affiliation(s)
- Ádám Vass
- Department
of Physical Chemistry and Materials Science, Interdisciplinary Excellence
Centre, University of Szeged, Aradi Square 1, Szeged H-6720, Hungary
| | - Balázs Endrődi
- Department
of Physical Chemistry and Materials Science, Interdisciplinary Excellence
Centre, University of Szeged, Aradi Square 1, Szeged H-6720, Hungary
| | - Gergely Ferenc Samu
- Department
of Physical Chemistry and Materials Science, Interdisciplinary Excellence
Centre, University of Szeged, Aradi Square 1, Szeged H-6720, Hungary
| | - Ádám Balog
- Department
of Physical Chemistry and Materials Science, Interdisciplinary Excellence
Centre, University of Szeged, Aradi Square 1, Szeged H-6720, Hungary
| | - Attila Kormányos
- Department
of Physical Chemistry and Materials Science, Interdisciplinary Excellence
Centre, University of Szeged, Aradi Square 1, Szeged H-6720, Hungary
- Helmholtz-Institute
Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, Egerlandstraße 3, 91058 Erlangen, Germany
| | - Serhiy Cherevko
- Helmholtz-Institute
Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, Egerlandstraße 3, 91058 Erlangen, Germany
| | - Csaba Janáky
- Department
of Physical Chemistry and Materials Science, Interdisciplinary Excellence
Centre, University of Szeged, Aradi Square 1, Szeged H-6720, Hungary
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23
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Schalenbach M, Durmus YE, Tempel H, Kungl H, Eichel RA. Double layer capacitances analysed with impedance spectroscopy and cyclic voltammetry: validity and limits of the constant phase element parameterization. Phys Chem Chem Phys 2021; 23:21097-21105. [PMID: 34523643 DOI: 10.1039/d1cp03381f] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Routinely, cyclic voltammetry (CV) or electrochemical impedance spectroscopy (EIS) are used in electrochemistry to probe the current response of a specimen. For the interpretation of the response, constant phase elements (CPEs) are used in the frequency domain based impedance calculus to parameterize the double layer. In this study, the double layer responses to the two measurement techniques are compared by probing a model-type polished gold electrode under potential and amplitude variation. The equivalent circuit that describes the double layer includes a CPE and is parameterized by impedance data, while a computational impedance-based Fourier transform model (source code disclosed) is used to describe the CV response. With CV, the measured and modelled responses show good agreement at amplitudes below 0.2 V and within a certain scan rate window. At larger amplitudes, the ion arrangement in the double layer is actively changed by the measurement, leading to potential dependencies and deviations from the CPE behaviour. These varying contributions to the impedance measurements are not respected in the impedance calculus that relies on a sinusoidal response. The transition from perturbations of the double layer equilibrium to distortions of the ion arrangements is analysed with both measurement methods.
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Affiliation(s)
- Maximilian Schalenbach
- Fundamental Electrochemistry (IEK-9), Institute of Energy and Climate Research, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany.
| | - Yassin Emre Durmus
- Fundamental Electrochemistry (IEK-9), Institute of Energy and Climate Research, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany.
| | - Hermann Tempel
- Fundamental Electrochemistry (IEK-9), Institute of Energy and Climate Research, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany.
| | - Hans Kungl
- Fundamental Electrochemistry (IEK-9), Institute of Energy and Climate Research, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany.
| | - Rüdiger-A Eichel
- Fundamental Electrochemistry (IEK-9), Institute of Energy and Climate Research, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany.
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24
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Polani S, MacArthur KE, Klingenhof M, Wang X, Paciok P, Pan L, Feng Q, Kormányos A, Cherevko S, Heggen M, Strasser P. Size and Composition Dependence of Oxygen Reduction Reaction Catalytic Activities of Mo-Doped PtNi/C Octahedral Nanocrystals. ACS Catal 2021. [DOI: 10.1021/acscatal.1c01761] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Shlomi Polani
- Electrochemical Energy, Catalysis and Material Science Laboratory, Department of Chemistry, Technical University Berlin, 10623 Berlin, Germany
| | - Katherine E. MacArthur
- Ernst-Ruska Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Malte Klingenhof
- Electrochemical Energy, Catalysis and Material Science Laboratory, Department of Chemistry, Technical University Berlin, 10623 Berlin, Germany
| | - Xingli Wang
- Electrochemical Energy, Catalysis and Material Science Laboratory, Department of Chemistry, Technical University Berlin, 10623 Berlin, Germany
| | - Paul Paciok
- Ernst-Ruska Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Lujin Pan
- Electrochemical Energy, Catalysis and Material Science Laboratory, Department of Chemistry, Technical University Berlin, 10623 Berlin, Germany
| | - Quanchen Feng
- Electrochemical Energy, Catalysis and Material Science Laboratory, Department of Chemistry, Technical University Berlin, 10623 Berlin, Germany
| | - Attila Kormányos
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich, 91058 Erlangen, Germany
| | - Serhiy Cherevko
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich, 91058 Erlangen, Germany
| | - Marc Heggen
- Ernst-Ruska Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Peter Strasser
- Electrochemical Energy, Catalysis and Material Science Laboratory, Department of Chemistry, Technical University Berlin, 10623 Berlin, Germany
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25
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Folkman SJ, González-Cobos J, Giancola S, Sánchez-Molina I, Galán-Mascarós JR. Benchmarking Catalysts for Formic Acid/Formate Electrooxidation. Molecules 2021; 26:4756. [PMID: 34443343 PMCID: PMC8398888 DOI: 10.3390/molecules26164756] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 07/29/2021] [Accepted: 08/03/2021] [Indexed: 11/16/2022] Open
Abstract
Energy production and consumption without the use of fossil fuels are amongst the biggest challenges currently facing humankind and the scientific community. Huge efforts have been invested in creating technologies that enable closed carbon or carbon neutral fuel cycles, limiting CO2 emissions into the atmosphere. Formic acid/formate (FA) has attracted intense interest as a liquid fuel over the last half century, giving rise to a plethora of studies on catalysts for its efficient electrocatalytic oxidation for usage in fuel cells. However, new catalysts and catalytic systems are often difficult to compare because of the variability in conditions and catalyst parameters examined. In this review, we discuss the extensive literature on FA electrooxidation using platinum, palladium and non-platinum group metal-based catalysts, the conditions typically employed in formate electrooxidation and the main electrochemical parameters for the comparison of anodic electrocatalysts to be applied in a FA fuel cell. We focused on the electrocatalytic performance in terms of onset potential and peak current density obtained during cyclic voltammetry measurements and on catalyst stability. Moreover, we handpicked a list of the most relevant examples that can be used for benchmarking and referencing future developments in the field.
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Affiliation(s)
- Scott J. Folkman
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology (BIST), Av. Paisos Catalans, 16, 43007 Tarragona, Spain; (S.G.); (I.S.-M.); (J.R.G.-M.)
| | - Jesús González-Cobos
- Institut de Recherches sur la Catalyse et l’Environnement de Lyon, UMR 5256, CNRS, Université Claude Bernard Lyon 1, 2 Avenue A. Einstein, 69626 Villeurbanne, France
| | - Stefano Giancola
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology (BIST), Av. Paisos Catalans, 16, 43007 Tarragona, Spain; (S.G.); (I.S.-M.); (J.R.G.-M.)
| | - Irene Sánchez-Molina
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology (BIST), Av. Paisos Catalans, 16, 43007 Tarragona, Spain; (S.G.); (I.S.-M.); (J.R.G.-M.)
| | - José Ramón Galán-Mascarós
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology (BIST), Av. Paisos Catalans, 16, 43007 Tarragona, Spain; (S.G.); (I.S.-M.); (J.R.G.-M.)
- ICREA, Pg. Llu’ıs Companys 23, 08010 Barcelona, Spain
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26
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Soto-Pérez J, Betancourt LE, Trinidad P, Larios E, Rojas-Pérez A, Quintana G, Sasaki K, Pollock CJ, Debefve LM, Cabrera CR. In Situ X-ray Absorption Spectroscopy of PtNi-Nanowire/Vulcan XC-72R under Oxygen Reduction Reaction in Alkaline Media. ACS OMEGA 2021; 6:17203-17216. [PMID: 34278107 PMCID: PMC8280705 DOI: 10.1021/acsomega.1c00792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 06/15/2021] [Indexed: 06/13/2023]
Abstract
Studying the oxygen reduction reaction (ORR) in the alkaline electrolyte has proven to promote better catalytic responses and accessibility to commercialization. Ni-nanowires (NWs) were synthesized via the solvothermal method and modified with Pt using the spontaneous galvanic displacement method to obtain PtNi-NWs. Carbon Vulcan XC-72R (V) was used as the catalyst support, and they were doped with NH3 to obtain PtNi-NWs/V and PtNi-NWs/V-NH3. Their electrocatalytic response for the ORR was tested and PtNi-NWs/V provided the highest specific activity with logarithmic values of 0.707 and 1.01 (mA/cm2 Pt) at 0.90 and 0.85 V versus reversible hydrogen electrode (RHE), respectively. PtNi-NWs showed the highest half-wave potential (E 1/2 = 0.89 V) at 1600 rpm and 12 μgPt/cm2 in 0.1 M KOH at 25.00 ± 0.01 °C. Additionally, the catalysts followed a four-electron pathway according to the Koutecký-Levich analysis. Moreover, durability experiments demonstrated that the PtNi-NW/V performance loss was like that of commercial Pt/V along 10,000 cycles. Electrochemical ORR in situ X-ray absorption spectroscopy results showed that the Pt L3 edge white line in the PtNi-NW catalysts changed while the electrochemical potential was lowered to negatives values, from 1.0 to 0.3 V versus RHE. The Pt/O region in the in situ Fourier transforms remained the same as the potentials were applied, suggesting an alloy formation between Pt and Ni, and Pt/Pt contracted in the presence of Ni. These results provide a better understanding of PtNi-NWs in alkaline electrolytes, suggesting that they are active catalysts for ORR and can be tuned for fuel cell studies.
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Affiliation(s)
- Joesene Soto-Pérez
- Department
of Chemistry, University of Puerto Rico, Río Piedras Campus, San Juan 00925-2537, Puerto Rico
| | - Luis E. Betancourt
- Chemistry
Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Pedro Trinidad
- Department
of Chemistry, University of Puerto Rico, Río Piedras Campus, San Juan 00925-2537, Puerto Rico
| | - Eduardo Larios
- Departamento
de Ingeniería Química y Metalurgia, Universidad de Sonora, Hermosillo 83000, Mexico
| | - Arnulfo Rojas-Pérez
- Department
of Chemistry, University of Puerto Rico, Río Piedras Campus, San Juan 00925-2537, Puerto Rico
| | - Gerardo Quintana
- Department
of Chemistry, University of Puerto Rico, Río Piedras Campus, San Juan 00925-2537, Puerto Rico
| | - Kotaro Sasaki
- Chemistry
Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Christopher J. Pollock
- Cornell
High Energy Synchrotron Source (CHESS), Wilson Laboratory, Cornell University, Ithaca, New York 14853, United Sates
| | - Louise M. Debefve
- Cornell
High Energy Synchrotron Source (CHESS), Wilson Laboratory, Cornell University, Ithaca, New York 14853, United Sates
| | - Carlos R. Cabrera
- Department
of Chemistry, University of Puerto Rico, Río Piedras Campus, San Juan 00925-2537, Puerto Rico
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27
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Speck FD, Zagalskaya A, Alexandrov V, Cherevko S. Periodicity in the Electrochemical Dissolution of Transition Metals. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202100337] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Florian D. Speck
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy, (IEK-11) Forschungszentrum Jülich Egerlandstr. 3 91058 Erlangen Germany
- Department of Chemical and Biological Engineering Friedrich-Alexander-Universität Erlangen-Nürnberg Egerlandstr. 3 91058 Erlangen Germany
| | - Alexandra Zagalskaya
- Department of Chemical and Biomolecular Engineering University of Nebraska-Lincoln 207E Othmer Hall Lincoln NE 68588 USA
| | - Vitaly Alexandrov
- Department of Chemical and Biomolecular Engineering University of Nebraska-Lincoln 207E Othmer Hall Lincoln NE 68588 USA
- Nebraska Center for Materials and Nanoscience University of Nebraska-Lincoln Lincoln NE 68588 USA
| | - Serhiy Cherevko
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy, (IEK-11) Forschungszentrum Jülich Egerlandstr. 3 91058 Erlangen Germany
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28
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Electrocatalyst nanoparticles go with the flow. Nat Catal 2021. [DOI: 10.1038/s41929-021-00635-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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29
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Speck FD, Zagalskaya A, Alexandrov V, Cherevko S. Periodicity in the Electrochemical Dissolution of Transition Metals. Angew Chem Int Ed Engl 2021; 60:13343-13349. [PMID: 33687762 PMCID: PMC8252536 DOI: 10.1002/anie.202100337] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Indexed: 12/18/2022]
Abstract
Extensive research efforts are currently dedicated to the search for new electrocatalyst materials in which expensive and rare noble metals are replaced with cheaper and more abundant transition metals. Recently, numerous alloys, oxides, and composites with such metals have been identified as highly active electrocatalysts through the use of high‐throughput screening methods with the help of activity descriptors. Up to this point, stability has lacked such descriptors. Hence, we elucidate the role of intrinsic metal/oxide properties on the corrosion behavior of representative 3d, 4d, and 5d transition metals. Electrochemical dissolution of nine transition metals is quantified using online inductively coupled plasma mass spectrometry (ICP‐MS). Based on the obtained dissolution data in alkaline and acidic media, we establish clear periodic correlations between the amount of dissolved metal, the cohesive energy of the metal atoms (Ecoh), and the energy of oxygen adsorption on the metal (ΔHO,ads). Such correlations can support the knowledge‐driven search for more stable electrocatalysts.
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Affiliation(s)
- Florian D Speck
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy, (IEK-11), Forschungszentrum Jülich, Egerlandstr. 3, 91058, Erlangen, Germany.,Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058, Erlangen, Germany
| | - Alexandra Zagalskaya
- Department of Chemical and Biomolecular Engineering, University of Nebraska-Lincoln, 207E Othmer Hall, Lincoln, NE, 68588, USA
| | - Vitaly Alexandrov
- Department of Chemical and Biomolecular Engineering, University of Nebraska-Lincoln, 207E Othmer Hall, Lincoln, NE, 68588, USA.,Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Serhiy Cherevko
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy, (IEK-11), Forschungszentrum Jülich, Egerlandstr. 3, 91058, Erlangen, Germany
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30
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Active electrochemical interfaces stabilized through self-organized potential oscillations. Electrochem commun 2020. [DOI: 10.1016/j.elecom.2020.106853] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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31
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Márquez-Montes RA, Kawashima K, Vo KM, Chávez-Flores D, Collins-Martínez VH, Mullins CB, Ramos-Sánchez VH. Simultaneous Sulfite Electrolysis and Hydrogen Production Using Ni Foam-Based Three-Dimensional Electrodes. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:12511-12520. [PMID: 32902265 DOI: 10.1021/acs.est.0c04190] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The electrochemical oxidation of sulfite ions offers encouraging advantages for large-scale hydrogen production, while sulfur dioxide emissions can be effectively used to obtain value-added byproducts. Herein, the performance and stability during sulfite electrolysis under alkaline conditions are evaluated. Nickel foam (NF) substrates were functionalized as the anode and cathode through electrochemical deposition of palladium and chemical oxidation to carry out the sulfite electro-oxidation and hydrogen evolution reactions, respectively. A combined analytical approach in which a robust electrochemical flow cell was coupled to different in situ and ex situ measurements was successfully implemented to monitor the activity and stability during electrolysis. Overall, satisfactory sulfite conversion and hydrogen production efficiencies (>90%) at 10 mA·cm-2 were mainly attributed to the use of NF in three-dimensional electrodes with a large surface area and enhanced mass transfer. Furthermore, stabilization processes associated with electrochemical dissolution and sulfur crossover through the membrane induced specific changes in the chemical and physical properties of the electrodes after electrolysis. This study demonstrates that NF-based electrocatalysts can be incorporated in an efficient electrochemical flow cell system for sulfite electrolysis and hydrogen production, with potential applications at a large scale.
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Affiliation(s)
- Raúl A Márquez-Montes
- Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua, Chihuahua, Chihuahua 31125, Mexico
| | - Kenta Kawashima
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Kobe M Vo
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - David Chávez-Flores
- Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua, Chihuahua, Chihuahua 31125, Mexico
| | | | - C Buddie Mullins
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
- McKetta Department of Chemical Engineering, Texas Materials Institute, and Center for Electrochemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Víctor H Ramos-Sánchez
- Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua, Chihuahua, Chihuahua 31125, Mexico
- Department of Mechanical and Aerospace Engineering, University of California San Diego, La Jolla, California 92093, United States
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32
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Bertram M, Prössl C, Ronovský M, Knöppel J, Matvija P, Fusek L, Skála T, Tsud N, Kastenmeier M, Matolín V, Mayrhofer KJJ, Johánek V, Mysliveček J, Cherevko S, Lykhach Y, Brummel O, Libuda J. Cobalt Oxide-Supported Pt Electrocatalysts: Intimate Correlation between Particle Size, Electronic Metal-Support Interaction and Stability. J Phys Chem Lett 2020; 11:8365-8371. [PMID: 32909431 DOI: 10.1021/acs.jpclett.0c02233] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Oxide supports can modify and stabilize platinum nanoparticles (NPs) in electrocatalytic materials. We studied related phenomena on model systems consisting of Pt NPs on atomically defined Co3O4(111) thin films. Chemical states and dissolution behavior of model catalysts were investigated as a function of the particle size and the electrochemical potential by ex situ emersion synchrotron radiation photoelectron spectroscopy and by online inductively coupled plasma mass spectrometry. Electronic metal-support interaction (EMSI) yields partially oxidized Ptδ+ species at the metal/support interface of metallic nanometer-sized Pt NPs. In contrast, subnanometer particles form Ptδ+ aggregates that are exclusively accompanied by subsurface Pt4+ species. Dissolution of Cox+ ions is strongly coupled to the presence of Ptδ+ and the reduction of subsurface Pt4+ species. Our findings suggest that EMSI directly affects the integrity of oxide-based electrocatalysts and may be employed to stabilize Pt NPs against sintering and dissolution.
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Affiliation(s)
- Manon Bertram
- Interface Research and Catalysis, ECRC, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany
| | - Carolin Prössl
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, Egerlandstraße 3, 91058 Erlangen, Germany
- Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Michal Ronovský
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University,V Hole šovičkách 2, 18000 Prague, Czech Republic
| | - Julius Knöppel
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, Egerlandstraße 3, 91058 Erlangen, Germany
- Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Peter Matvija
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University,V Hole šovičkách 2, 18000 Prague, Czech Republic
| | - Lukáš Fusek
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University,V Hole šovičkách 2, 18000 Prague, Czech Republic
| | - Tomáš Skála
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University,V Hole šovičkách 2, 18000 Prague, Czech Republic
| | - Nataliya Tsud
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University,V Hole šovičkách 2, 18000 Prague, Czech Republic
| | - Maximilian Kastenmeier
- Interface Research and Catalysis, ECRC, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany
| | - Vladimír Matolín
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University,V Hole šovičkách 2, 18000 Prague, Czech Republic
| | - Karl J J Mayrhofer
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, Egerlandstraße 3, 91058 Erlangen, Germany
| | - Viktor Johánek
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University,V Hole šovičkách 2, 18000 Prague, Czech Republic
| | - Josef Mysliveček
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University,V Hole šovičkách 2, 18000 Prague, Czech Republic
| | - Serhiy Cherevko
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, Egerlandstraße 3, 91058 Erlangen, Germany
| | - Yaroslava Lykhach
- Interface Research and Catalysis, ECRC, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany
| | - Olaf Brummel
- Interface Research and Catalysis, ECRC, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany
| | - Jörg Libuda
- Interface Research and Catalysis, ECRC, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany
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33
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Silva Olaya AR, Zandersons B, Wittstock G. Restructuring of Nanoporous Gold Surfaces During Electrochemical Cycling in Acidic and Alkaline Media. ChemElectroChem 2020. [DOI: 10.1002/celc.202000923] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Birthe Zandersons
- Institute of Materials Physics and Technology Hamburg University of Technology 21073 Hamburg Germany
| | - Gunther Wittstock
- Department of Chemistry Carl von Ossietzky University of Oldenburg 26111 Oldenburg Germany
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34
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Kormányos A, Speck FD, Mayrhofer KJJ, Cherevko S. Influence of Fuels and pH on the Dissolution Stability of Bifunctional PtRu/C Alloy Electrocatalysts. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02094] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Attila Kormányos
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich, Egerlandstraße 3, 91058 Erlangen, Germany
| | - Florian D. Speck
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich, Egerlandstraße 3, 91058 Erlangen, Germany
- Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstaße 3, 91058 Erlangen, Germany
| | - Karl J. J. Mayrhofer
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich, Egerlandstraße 3, 91058 Erlangen, Germany
- Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstaße 3, 91058 Erlangen, Germany
| | - Serhiy Cherevko
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich, Egerlandstraße 3, 91058 Erlangen, Germany
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35
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Xie Y, Yang Y, Muller DA, Abruña HD, Dimitrov N, Fang J. Enhanced ORR Kinetics on Au-Doped Pt–Cu Porous Films in Alkaline Media. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02690] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yunxiang Xie
- Department of Chemistry, State University of New York at Binghamton, Binghamton, New York 13902, United States
| | - Yao Yang
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - David A. Muller
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States
| | - Héctor D. Abruña
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Nikolay Dimitrov
- Department of Chemistry, State University of New York at Binghamton, Binghamton, New York 13902, United States
| | - Jiye Fang
- Department of Chemistry, State University of New York at Binghamton, Binghamton, New York 13902, United States
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36
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Gatard V, De Masi D, Chattot R, Marin IM, Revert JMA, Fazzini PF, Encinas T, Martin V, Faure S, Deseure J, Carrey J, Chaudret B, Chatenet M. FeNi3 and Ni-Based Nanoparticles as Electrocatalysts for Magnetically Enhanced Alkaline Water Electrolysis. Electrocatalysis (N Y) 2020. [DOI: 10.1007/s12678-020-00616-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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37
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Electrochemical copper dissolution: A benchmark for stable CO2 reduction on copper electrocatalysts. Electrochem commun 2020. [DOI: 10.1016/j.elecom.2020.106739] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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38
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López-Fernández E, Gil-Rostra J, Espinós JP, González-Elipe AR, de Lucas Consuegra A, Yubero F. Chemistry and Electrocatalytic Activity of Nanostructured Nickel Electrodes for Water Electrolysis. ACS Catal 2020. [DOI: 10.1021/acscatal.0c00856] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- E. López-Fernández
- Laboratory of Nanotechnology on Surfaces and Plasma, Institute of Materials Science of Seville (CSIC-Univ. Sevilla), Av. Américo Vespucio 49, E-41092 Sevilla, Spain
- Department of Chemical Engineering, School of Chemical Sciences and Technologies, University of Castilla-La Mancha, Avda. Camilo José Cela 12, E-13071, Ciudad Real, Spain
| | - J. Gil-Rostra
- Laboratory of Nanotechnology on Surfaces and Plasma, Institute of Materials Science of Seville (CSIC-Univ. Sevilla), Av. Américo Vespucio 49, E-41092 Sevilla, Spain
| | - J. P. Espinós
- Laboratory of Nanotechnology on Surfaces and Plasma, Institute of Materials Science of Seville (CSIC-Univ. Sevilla), Av. Américo Vespucio 49, E-41092 Sevilla, Spain
| | - A. R. González-Elipe
- Laboratory of Nanotechnology on Surfaces and Plasma, Institute of Materials Science of Seville (CSIC-Univ. Sevilla), Av. Américo Vespucio 49, E-41092 Sevilla, Spain
| | - A. de Lucas Consuegra
- Department of Chemical Engineering, School of Chemical Sciences and Technologies, University of Castilla-La Mancha, Avda. Camilo José Cela 12, E-13071, Ciudad Real, Spain
| | - F. Yubero
- Laboratory of Nanotechnology on Surfaces and Plasma, Institute of Materials Science of Seville (CSIC-Univ. Sevilla), Av. Américo Vespucio 49, E-41092 Sevilla, Spain
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39
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Electrochemical hydrogen compression and purification versus competing technologies: Part II. Challenges in electrocatalysis. CHINESE JOURNAL OF CATALYSIS 2020. [DOI: 10.1016/s1872-2067(19)63438-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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40
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Zagalskaya A, Alexandrov V. Role of Defects in the Interplay between Adsorbate Evolving and Lattice Oxygen Mechanisms of the Oxygen Evolution Reaction in RuO2 and IrO2. ACS Catal 2020. [DOI: 10.1021/acscatal.9b05544] [Citation(s) in RCA: 163] [Impact Index Per Article: 40.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Alexandra Zagalskaya
- Department of Chemical and Biomolecular Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States
| | - Vitaly Alexandrov
- Department of Chemical and Biomolecular Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States
- Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States
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41
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Phosphate stabilized PdCoP@Nifoam catalyst for self-pressurized H2 production from the electrochemical reforming of ethanol at 150 °C. J Catal 2020. [DOI: 10.1016/j.jcat.2019.12.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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42
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Conductive additives for oxide-based OER catalysts: A comparative RRDE study of carbon and silver in alkaline medium. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.06.154] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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43
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Davydova ES, Speck FD, Paul MT, Dekel DR, Cherevko S. Stability Limits of Ni-Based Hydrogen Oxidation Electrocatalysts for Anion Exchange Membrane Fuel Cells. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01582] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Elena S. Davydova
- The Wolfson Department of Chemical Engineering, Technion−Israel Institute of Technology, 3200003 Haifa, Israel
| | - Florian D. Speck
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, 91058 Erlangen, Germany
- Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Michael T.Y. Paul
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, 91058 Erlangen, Germany
| | - Dario R. Dekel
- The Wolfson Department of Chemical Engineering, Technion−Israel Institute of Technology, 3200003 Haifa, Israel
- The Nancy and Stephen Grand Technion Energy Program (GTEP), Technion−Israel Institute of Technology, 3200003 Haifa, Israel
| | - Serhiy Cherevko
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, 91058 Erlangen, Germany
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44
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Wet-chemical etching of metals for advanced semiconductor technology nodes: Ru etching in acidic Ce4+ solutions. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.03.065] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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45
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Sulfate-induced electrochemical instability in the transpassive region during the electrooxidation of Na2S on Pt. J Solid State Electrochem 2019. [DOI: 10.1007/s10008-019-04234-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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46
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Kasian O, Geiger S, Mayrhofer KJJ, Cherevko S. Electrochemical On-line ICP-MS in Electrocatalysis Research. CHEM REC 2018; 19:2130-2142. [PMID: 30589199 DOI: 10.1002/tcr.201800162] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 11/20/2018] [Indexed: 01/13/2023]
Abstract
Electrocatalyst degradation due to dissolution is one of the major challenges in electrochemical energy conversion technologies such as fuel cells and electrolysers. While tendencies towards dissolution can be grasped considering available thermodynamic data, the kinetics of material's stability in real conditions is still difficult to predict and have to be measured experimentally, ideally in-situ and/or on-line. On-line inductively coupled plasma mass spectrometry (ICP-MS) is a technique developed recently to address exactly this issue. It allows time- and potential-resolved analysis of dissolution products in the electrolyte during the reaction under dynamic conditions. In this work, applications of on-line ICP-MS techniques in studies embracing dissolution of catalysts for oxygen reduction (ORR) and evolution (OER) as well as hydrogen oxidation (HOR) and evolution (HER) reactions are reviewed.
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Affiliation(s)
- Olga Kasian
- Department of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, 40237, Düsseldorf, Germany
| | - Simon Geiger
- Department of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, 40237, Düsseldorf, Germany.,Current address: Institute of Engineering Thermodynamics, German Aerospace Center (DLR), Pfaffenwaldring 38-40, 70569, Stuttgart, Germany
| | - Karl J J Mayrhofer
- Department of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, 40237, Düsseldorf, Germany.,Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich, 91058, Erlangen, Germany.,Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058, Erlangen, Germany
| | - Serhiy Cherevko
- Department of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, 40237, Düsseldorf, Germany.,Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich, 91058, Erlangen, Germany
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47
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Oxygen Reduction Reaction Electrocatalysis in Alkaline Electrolyte on Glassy-Carbon-Supported Nanostructured Pr6O11 Thin-Films. Catalysts 2018. [DOI: 10.3390/catal8100461] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
In this work, hierarchical nanostructured Pr6O11 thin-films of brain-like morphology were successfully prepared by electrostatic spray deposition (ESD) on glassy-carbon substrates. These surfaces were used as working electrodes in the rotating disk electrode (RDE) setup and characterized in alkaline electrolyte (0.1 M NaOH at 25 ± 2 °C) for the hydrogen evolution reaction (HER), the oxygen evolution reaction (OER), and the oxygen reduction reaction (ORR) for their potential application in alkaline electrolyzers or in alkaline fuel cells. The electrochemical performances of these electrodes were investigated as a function of their crystallized state (amorphous versus crystalline). Although none of the materials display spectacular HER and OER activity, the results show interesting performances of the crystallized sample towards the ORR with regards to this class of non-Pt group metal (non-PGM) electrocatalysts, the activity being, however, still far from a benchmark Pt/C electrocatalyst.
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