1
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Benedet M, Gallo A, Maccato C, Rizzi GA, Barreca D, Lebedev OI, Modin E, McGlynn R, Mariotti D, Gasparotto A. Controllable Anchoring of Graphitic Carbon Nitride on MnO 2 Nanoarchitectures for Oxygen Evolution Electrocatalysis. ACS APPLIED MATERIALS & INTERFACES 2023; 15:47368-47380. [PMID: 37769189 PMCID: PMC10571007 DOI: 10.1021/acsami.3c09363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 09/17/2023] [Indexed: 09/30/2023]
Abstract
The design and fabrication of eco-friendly and cost-effective (photo)electrocatalysts for the oxygen evolution reaction (OER) is a key research goal for a proper management of water splitting to address the global energy crisis. In this work, we focus on the preparation of supported MnO2/graphitic carbon nitride (g-CN) OER (photo)electrocatalysts by means of a novel preparation strategy. The proposed route consists of the plasma enhanced-chemical vapor deposition (PE-CVD) of MnO2 nanoarchitectures on porous Ni scaffolds, the anchoring of controllable g-CN amounts by an amenable electrophoretic deposition (EPD) process, and the ultimate thermal treatment in air. The inherent method versatility and flexibility afforded defective MnO2/g-CN nanoarchitectures, featuring a g-CN content and nano-organization tunable as a function of EPD duration and the used carbon nitride precursor. Such a modulation had a direct influence on OER functional performances, which, for the best composite system, corresponded to an overpotential of 430 mV at 10 mA/cm2, a Tafel slope of ≈70 mV/dec, and a turnover frequency of 6.52 × 10-3 s-1, accompanied by a very good time stability. The present outcomes, comparing favorably with previous results on analogous systems, were rationalized on the basis of the formation of type-II MnO2/g-CN heterojunctions, and yield valuable insights into this class of green (photo)electrocatalysts for end uses in solar-to-fuel conversion and water treatment.
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Affiliation(s)
- Mattia Benedet
- Department
of Chemical Sciences, Padova University
and INSTM, 35131 Padova, Italy
- CNR-ICMATE
and INSTM, Department of Chemical Sciences, Padova University, 35131 Padova, Italy
| | - Andrea Gallo
- Department
of Chemical Sciences, Padova University
and INSTM, 35131 Padova, Italy
| | - Chiara Maccato
- Department
of Chemical Sciences, Padova University
and INSTM, 35131 Padova, Italy
- CNR-ICMATE
and INSTM, Department of Chemical Sciences, Padova University, 35131 Padova, Italy
| | - Gian Andrea Rizzi
- Department
of Chemical Sciences, Padova University
and INSTM, 35131 Padova, Italy
- CNR-ICMATE
and INSTM, Department of Chemical Sciences, Padova University, 35131 Padova, Italy
| | - Davide Barreca
- CNR-ICMATE
and INSTM, Department of Chemical Sciences, Padova University, 35131 Padova, Italy
| | - Oleg I. Lebedev
- Laboratoire
CRISMAT, UMR 6508 CNRS/ENSICAEN/UCBN, 14050 Caen Cedex 4, France
| | - Evgeny Modin
- CIC
nanoGUNE BRTA, Donostia, 20018 San Sebastian, Spain
| | - Ruairi McGlynn
- School
of Engineering, Ulster University, 2-24 York Street, Belfast BT15 1AP, Northern Ireland
| | - Davide Mariotti
- School
of Engineering, Ulster University, 2-24 York Street, Belfast BT15 1AP, Northern Ireland
| | - Alberto Gasparotto
- Department
of Chemical Sciences, Padova University
and INSTM, 35131 Padova, Italy
- CNR-ICMATE
and INSTM, Department of Chemical Sciences, Padova University, 35131 Padova, Italy
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2
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Ramírez AR, Heidari S, Vergara A, Aguilera MV, Preuss P, Camarada MB, Fischer A. Rhenium-Based Electrocatalysts for Water Splitting. ACS MATERIALS AU 2023; 3:177-200. [PMID: 38089137 PMCID: PMC10176616 DOI: 10.1021/acsmaterialsau.2c00077] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 01/21/2023] [Accepted: 01/23/2023] [Indexed: 06/28/2024]
Abstract
Due to the contamination and global warming problems, it is necessary to search for alternative environmentally friendly energy sources. In this area, hydrogen is a promising alternative. Hydrogen is even more promising, when it is obtained through water electrolysis operated with renewable energy sources. Among the possible devices to perform electrolysis, proton exchange membrane (PEM) electrolyzers appear as the most promising commercial systems for hydrogen production in the coming years. However, their massification is affected by the noble metals used as electrocatalysts in their electrodes, with high commercial value: Pt at the cathode where the hydrogen evolution reaction occurs (HER) and Ru/Ir at the anode where the oxygen evolution reaction (OER) happens. Therefore, to take full advantage of the PEM technology for green H2 production and build up a mature PEM market, it is imperative to search for more abundant, cheaper, and stable catalysts, reaching the highest possible activities at the lowest overpotential with the longest stability under the harsh acidic conditions of a PEM. In the search for new electrocatalysts and considering the predictions of a Trasatti volcano plot, rhenium appears to be a promising candidate for HER in acidic media. At the same time, recent studies provide evidence of its potential as an OER catalyst. However, some of these reports have focused on chemical and photochemical water splitting and have not always considered acidic media. This review summarizes rhenium-based electrocatalysts for water splitting under acidic conditions: i.e., potential candidates as cathode materials. In the various sections, we review the mechanism concepts of electrocatalysis, evaluation methods, and the different rhenium-based materials applied for the HER in acidic media. As rhenium is less common for the OER, we included a section about its use in chemical and photochemical water oxidation and as an electrocatalyst under basic conditions. Finally, concluding remarks and perspectives are given about rhenium for water splitting.
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Affiliation(s)
- Andrés
M. R. Ramírez
- Centro
de Nanotecnología Aplicada, Facultad de Ciencias, Ingeniería
y Tecnología, Universidad Mayor, Camino La Pirámide 5750, 8580745 Huechuraba, Santiago RM Chile
- Universidad
Mayor, Núcleo Química y Bioquímica, Facultad
de Ciencias, Ingeniería y Tecnología, Universidad Mayor, Camino
La Pirámide 5750, 8580745 Huechuraba, Santiago RM Chile
| | - Sima Heidari
- Inorganic
Functional Materials and Nanomaterials Group, Institute for Inorganic
and Analytical Chemistry, University of
Freiburg, Albertstraße 21, 79104 Freiburg, Germany
- FMF
− Freiburg Materials Research Center, University of Freiburg, Stefan-Meier-Straße 19, 79104 Freiburg, Germany
- FIT
− Freiburg Center for Interactive Materials and Bioinspired
Technologies, University of Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
| | - Ana Vergara
- Centro
de Nanotecnología Aplicada, Facultad de Ciencias, Ingeniería
y Tecnología, Universidad Mayor, Camino La Pirámide 5750, 8580745 Huechuraba, Santiago RM Chile
| | - Miguel Villicaña Aguilera
- Departamento
de Química Inorgánica, Facultad de Química y
de Farmacia, Pontificia Universidad Católica
de Chile, Santiago 7820436, Chile
| | - Paulo Preuss
- Departamento
de Química Inorgánica, Facultad de Química y
de Farmacia, Pontificia Universidad Católica
de Chile, Santiago 7820436, Chile
| | - María B. Camarada
- Inorganic
Functional Materials and Nanomaterials Group, Institute for Inorganic
and Analytical Chemistry, University of
Freiburg, Albertstraße 21, 79104 Freiburg, Germany
- FIT
− Freiburg Center for Interactive Materials and Bioinspired
Technologies, University of Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
- Departamento
de Química Inorgánica, Facultad de Química y
de Farmacia, Pontificia Universidad Católica
de Chile, Santiago 7820436, Chile
- Centro Investigación
en Nanotecnología y Materiales Avanzados, CIEN-UC, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile
| | - Anna Fischer
- Inorganic
Functional Materials and Nanomaterials Group, Institute for Inorganic
and Analytical Chemistry, University of
Freiburg, Albertstraße 21, 79104 Freiburg, Germany
- FMF
− Freiburg Materials Research Center, University of Freiburg, Stefan-Meier-Straße 19, 79104 Freiburg, Germany
- FIT
− Freiburg Center for Interactive Materials and Bioinspired
Technologies, University of Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
- Cluster
of Excellence livMatS, University of Freiburg, 79104 Freiburg, Germany
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3
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Shanahan B, Seteiz K, Heizmann PA, Koch S, Büttner J, Ouardi S, Vierrath S, Fischer A, Breitwieser M. Rapid wet-chemical oxidative activation of graphite felt electrodes for vanadium redox flow batteries. RSC Adv 2021; 11:32095-32105. [PMID: 35495532 PMCID: PMC9042029 DOI: 10.1039/d1ra05808h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 09/22/2021] [Indexed: 11/27/2022] Open
Abstract
To boost the performance of vanadium redox flow batteries, modification of the classically used felt electrodes is required to enable higher cycling performance and longer life cycles. Alternative approaches to the standard thermal oxidation procedure such as wet chemical oxidation are promising to reduce the thermal budget and thus the cost of the activation procedure. In this work we report a rapid 1 hour activation procedure in an acidified KMnO4 solution. We show that the reported modification process of the felt electrodes results in an increase in surface area, density of oxygenated surface functionalities as well as electrolyte wettability, as demonstrated by N2-physisorption, XPS, Raman spectroscopy as well as contact angle measurements. The activation process enables battery cycling at remarkably high current densities up to 400 mA cm−2. Stable cycling at 400 mA cm−2 over 30 cycles confirms promising stability of the reported activation procedure. Schematic diagram of the K-GF fabrication process. Step 1: deposition of MnOx layers onto the P-GF electrode surface using acidified KMnO4 solutions. Step 2: removal of MnOx layers using an acidified H2O2 solution to produce the K-GF electrode.![]()
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Affiliation(s)
- Brian Shanahan
- Electrochemical Energy Systems, Laboratory for MEMS applications, IMTEK - Department of Microsystems Engineering, University of Freiburg Georges-Koehler-Allee 103 79110 Freiburg Germany
| | - Khaled Seteiz
- Electrochemical Energy Systems, Laboratory for MEMS applications, IMTEK - Department of Microsystems Engineering, University of Freiburg Georges-Koehler-Allee 103 79110 Freiburg Germany
| | - Philipp A Heizmann
- Electrochemical Energy Systems, Laboratory for MEMS applications, IMTEK - Department of Microsystems Engineering, University of Freiburg Georges-Koehler-Allee 103 79110 Freiburg Germany .,FIT, University of Freiburg Georges-Koehler-Allee 105 79110 Freiburg Germany
| | - Susanne Koch
- Electrochemical Energy Systems, Laboratory for MEMS applications, IMTEK - Department of Microsystems Engineering, University of Freiburg Georges-Koehler-Allee 103 79110 Freiburg Germany .,Hahn-Schickard Georges-Koehler-Allee 103 79110 Freiburg Germany
| | - Jan Büttner
- FIT, University of Freiburg Georges-Koehler-Allee 105 79110 Freiburg Germany .,Institute for Inorganic and Analytical Chemistry, University of Freiburg Alberstr. 21 79104 Freiburg Germany.,Cluster of Excellence livMatS, University of Freiburg 79104 Freiburg Germany
| | - Siham Ouardi
- Fraunhofer Institute for Solar Energy Systems ISE Heidenhofstr. 2 79110 Freiburg Germany
| | - Severin Vierrath
- Electrochemical Energy Systems, Laboratory for MEMS applications, IMTEK - Department of Microsystems Engineering, University of Freiburg Georges-Koehler-Allee 103 79110 Freiburg Germany .,FIT, University of Freiburg Georges-Koehler-Allee 105 79110 Freiburg Germany .,Hahn-Schickard Georges-Koehler-Allee 103 79110 Freiburg Germany
| | - Anna Fischer
- FIT, University of Freiburg Georges-Koehler-Allee 105 79110 Freiburg Germany .,Institute for Inorganic and Analytical Chemistry, University of Freiburg Alberstr. 21 79104 Freiburg Germany.,Cluster of Excellence livMatS, University of Freiburg 79104 Freiburg Germany.,FMF-Freiburg Materials Research Center, University of Freiburg Stefan-Meier Str. 21 79104 Freiburg Germany
| | - Matthias Breitwieser
- Electrochemical Energy Systems, Laboratory for MEMS applications, IMTEK - Department of Microsystems Engineering, University of Freiburg Georges-Koehler-Allee 103 79110 Freiburg Germany .,Hahn-Schickard Georges-Koehler-Allee 103 79110 Freiburg Germany
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4
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Gürbüz MU, Elmacı G, Zhang Y, Meng X, Ertürk AS. Cryptomelane nanorods coated with Ni ion doped Birnessite polymorphs as bifunctional efficient catalyst for the oxygen evolution reaction and degradation of organic contaminants. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6432] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Mustafa Ulvi Gürbüz
- Department of Chemistry, Faculty of Arts and Sciences Yıldız Technical University Istanbul Turkey
| | - Gökhan Elmacı
- Department of Chemistry School of Technical Sciences, Adıyaman University Adıyaman Turkey
| | - Yajun Zhang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP) Chinese Academy of Sciences Lanzhou China
| | - Xu Meng
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP) Chinese Academy of Sciences Lanzhou China
| | - Ali Serol Ertürk
- Department of Analytical Chemistry, Faculty of Pharmacy Adıyaman University Adıyaman Turkey
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5
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Jia J, Li L, Lian X, Wu M, Zheng F, Song L, Hu G, Niu H. A mild reduction of Co-doped MnO 2 to create abundant oxygen vacancies and active sites for enhanced oxygen evolution reaction. NANOSCALE 2021; 13:11120-11127. [PMID: 34132721 DOI: 10.1039/d1nr02324a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Efficient and non-precious-metal-based catalysts (e.g., manganese-based oxides) for the oxygen evolution reaction (OER) remain a substantial challenge. Creation of oxygen vacancies of manganese-based oxides with the aim to enhance their intrinsic activities is rarely reported, and there is a critical requirement for a mild and facile synthesis strategy to create abundant oxygen vacancies on manganese-based oxides. Herein, Co-doped MnO2 nanowires were reduced by NaBH4 solution at room temperature; then, MnCo2O4.5 nanosheets with abundant oxygen vacancies and active sites were formed on the surface of Co-doped MnO2 nanowires. Benefiting from the reduction strategy, the fabricated hierarchical Co-doped-MnO2@MnCo2O4.5 nanowire/nanosheet nanocomposites exhibit higher catalytic activity (an overpotential of 250 mV at a current density of 10 mA cm-2 in 1.0 M KOH solution) than pristine Co-doped MnO2 nanowires. The calculated TOF of Co-doped-MnO2@MnCo2O4.5 is 0.034 s-1 at the overpotential of 300 mV, which is 136-fold higher than that of Co-doped-MnO2. The excellent OER performance was attributed to the synergistic advantages of abundant oxygen vacancies and active sites over the hierarchical nanowire-nanosheet architectures.
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Affiliation(s)
- Jincan Jia
- AnHui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Key Laboratory of Functional Inorganic Materials of Anhui Province, Department of Chemistry, Anhui University, Hefei 230601, PR China.
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6
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Yashas SR, Shivaraju HP, Pema G, Kumara Swamy N, Namratha K, Gurupadayya B, Madhusudan P. Sonochemical synthesis of graphitic carbon nitride-manganese oxide interfaces for enhanced photocatalytic degradation of tetracycline hydrochloride. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:4778-4789. [PMID: 32949361 DOI: 10.1007/s11356-020-10813-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 09/10/2020] [Indexed: 06/11/2023]
Abstract
The present study focuses on the sonochemical synthesis of graphitic carbon nitride-manganese oxide (GCN/MnO2) nanocomposite for photocatalytic degradation of an environmentally hazardous pharmaceutical compound, tetracycline hydrochloride (TcH). The sonochemical synthesis aided in tailoring the morphology of GCN/MnO2. The characterization results of SEM/FESEM, XRD, FTIR, UV-Vis spectra, EIS, CV, etc., revealed on the morphology, composition, crystallinity, and other photo-electro-intrinsic properties of the materials. The synergy of GCN and MnO2 results in rapid electron transfer, efficient visible-light absorption, and slower electron-hole pair recombination through its photo-responsive traits against TcH. It was noted that ~ 93% TcH (20 mg L-1) degradation was achieved for 30-mg catalyst dose under light-emitting diode (LED) irradiation (9 W, 220 V) in 135-min duration. The TcH mineralization results were well fit to pseudo-first-order kinetics with a rate constant of 0.02 min-1 (R2 = 0.994). In addition, the composite possessed fair reusability for consequent cycles. Hence, the as-synthesized composite applied for photocatalysis and photoelectrocatalysis fosters a fit-for-purpose and reliable system in the decontamination of TcH in environmental samples. Graphical Abstract.
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Affiliation(s)
- Shivamurthy Ravindra Yashas
- Department of Environmental Sciences, Faculty of Natural Sciences, JSS Academy of Higher Education and Research, Sri Shivarathreshwaranagar, Mysuru, Karnataka, 570015, India
| | - Harikaranahalli Puttaiah Shivaraju
- Department of Environmental Sciences, Faculty of Natural Sciences, JSS Academy of Higher Education and Research, Sri Shivarathreshwaranagar, Mysuru, Karnataka, 570015, India.
- Center for Water, Food and Energy, GREENS Trust, Harikaranahalli, Dombaranahalli Post, Turuvekere Taluka, Tumkur District, Karnataka, 572215, India.
| | - Gyaltsen Pema
- Department of Environmental Sciences, Faculty of Natural Sciences, JSS Academy of Higher Education and Research, Sri Shivarathreshwaranagar, Mysuru, Karnataka, 570015, India
- Center for Water, Food and Energy, GREENS Trust, Harikaranahalli, Dombaranahalli Post, Turuvekere Taluka, Tumkur District, Karnataka, 572215, India
| | - Ningappa Kumara Swamy
- Department of Chemistry, Sri Jayachamarajendra College of Engineering, JSS Science and Technology University, Mysuru, 570006, India
| | - Keerthiraj Namratha
- Center for Materials Science and Technology and DOS in Earth Science, University of Mysore, Mysuru, 570006, India
| | - Bannimath Gurupadayya
- Department of Pharmaceutical Chemistry, JSS College of Pharmacy, JSS Academy of Higher Education and Research, Mysuru, 570015, India
| | - Puttaswamy Madhusudan
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, People's Republic of China
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7
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Heese‐Gärtlein J, Morales DM, Rabe A, Bredow T, Schuhmann W, Behrens M. Factors Governing the Activity of α-MnO 2 Catalysts in the Oxygen Evolution Reaction: Conductivity versus Exposed Surface Area of Cryptomelane. Chemistry 2020; 26:12256-12267. [PMID: 32159252 PMCID: PMC7540518 DOI: 10.1002/chem.201905090] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2019] [Indexed: 12/20/2022]
Abstract
Cryptomelane (α-(K)MnO2 ) powders were synthesized by different methods leading to only slight differences in their bulk crystal structure and chemical composition, while the BET surface area and the crystallite size differed significantly. Their performance in the oxygen evolution reaction (OER) covered a wide range and their sequence of increasing activity differed when electrocatalysis in alkaline electrolyte and chemical water oxidation using Ce4+ were compared. The decisive factors that explain this difference were identified in the catalysts' microstructure. Chemical water oxidation activity is substantially governed by the exposed surface area, while the electrocatalytic activity is determined largely by the electric conductivity, which was found to correlate with the particle morphology in terms of needle length and aspect ratio in this sample series. This correlation is rather explained by an improved conductivity due to longer needles than by structure sensitivity as was supported by reference experiments using H2 O2 decomposition and carbon black as additive. The most active catalyst R-cryptomelane reached a current density of 10 mA cm-2 at a potential 1.73 V without, and at 1.71 V in the presence of carbon black. The improvement was significantly higher for the catalyst with lower initial activity. However, the materials showed a disappointing catalytic stability during alkaline electrochemical OER, whereas the crystal structure was found to be stable at working conditions.
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Affiliation(s)
- Justus Heese‐Gärtlein
- Faculty of Chemistry andCenter for Nanointegration Duisburg-Essen (CENIDE)University of Duisburg-EssenUniversitätsstr. 745114EssenGermany
| | - Dulce M. Morales
- Analytical Chemistry—Center for Electrochemical Sciences (CES), Faculty of Chemistry and BiochemistryRuhr University BochumUniversitätsstr. 15044780BochumGermany
| | - Anna Rabe
- Faculty of Chemistry andCenter for Nanointegration Duisburg-Essen (CENIDE)University of Duisburg-EssenUniversitätsstr. 745114EssenGermany
| | - Thomas Bredow
- Mulliken Center for Theoretical ChemistryInstitut für Physikalische und Theoretische ChemieUniversity of BonnBeringstr. 453115BonnGermany
| | - Wolfgang Schuhmann
- Analytical Chemistry—Center for Electrochemical Sciences (CES), Faculty of Chemistry and BiochemistryRuhr University BochumUniversitätsstr. 15044780BochumGermany
| | - Malte Behrens
- Faculty of Chemistry andCenter for Nanointegration Duisburg-Essen (CENIDE)University of Duisburg-EssenUniversitätsstr. 745114EssenGermany
- Ertl Center for Electrochemistry and CatalysisGwangju Institute of Science (GIST)123 Cheomdan-gwagiro (Oryang-dong), Buk-guGwangju500-712South Korea
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8
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Dong Y, Oloman CW, Gyenge EL, Su J, Chen L. Transition metal based heterogeneous electrocatalysts for the oxygen evolution reaction at near-neutral pH. NANOSCALE 2020; 12:9924-9934. [PMID: 32364205 DOI: 10.1039/d0nr02187c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The oxygen evolution reaction (OER) is considered as a major bottleneck of water splitting for hydrogen generation. It is highly desired to develop high performance OER catalysts in near-neutral operating environments because of mild corrosion and pollution. This review summarized the recent development of heterogeneous catalysts containing transition metals (TM) for the OER at near-neutral pH. Specifically, we focus on some effective strategies to achieve a high OER performance for TM (e.g., Co, Mn, Ni, Cu, Fe, and binary TM)-based catalysts in near-neutral media. The progress and perspectives are discussed, which might provide some insights into the rapid promotion of the electrocatalytic performance for future applications in hydrogen production.
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Affiliation(s)
- Yan Dong
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, P.R. China.
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9
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Melder J, Bogdanoff P, Zaharieva I, Fiechter S, Dau H, Kurz P. Water-Oxidation Electrocatalysis by Manganese Oxides: Syntheses, Electrode Preparations, Electrolytes and Two Fundamental Questions. Z PHYS CHEM 2020. [DOI: 10.1515/zpch-2019-1491] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Abstract
The efficient catalysis of the four-electron oxidation of water to molecular oxygen is a central challenge for the development of devices for the production of solar fuels. This is equally true for artificial leaf-type structures and electrolyzer systems. Inspired by the oxygen evolving complex of Photosystem II, the biological catalyst for this reaction, scientists around the globe have investigated the possibility to use manganese oxides (“MnOx”) for this task. This perspective article will look at selected examples from the last about 10 years of research in this field. At first, three aspects are addressed in detail which have emerged as crucial for the development of efficient electrocatalysts for the anodic oxygen evolution reaction (OER): (1) the structure and composition of the “MnOx” is of central importance for catalytic performance and it seems that amorphous, MnIII/IV oxides with layered or tunnelled structures are especially good choices; (2) the type of support material (e.g. conducting oxides or nanostructured carbon) as well as the methods used to immobilize the MnOx catalysts on them greatly influence OER overpotentials, current densities and long-term stabilities of the electrodes and (3) when operating MnOx-based water-oxidizing anodes in electrolyzers, it has often been observed that the electrocatalytic performance is also largely dependent on the electrolyte’s composition and pH and that a number of equilibria accompany the catalytic process, resulting in “adaptive changes” of the MnOx material over time. Overall, it thus has become clear over the last years that efficient and stable water-oxidation electrolysis by manganese oxides can only be achieved if at least four parameters are optimized in combination: the oxide catalyst itself, the immobilization method, the catalyst support and last but not least the composition of the electrolyte. Furthermore, these parameters are not only important for the electrode optimization process alone but must also be considered if different electrode types are to be compared with each other or with literature values from literature. Because, as without their consideration it is almost impossible to draw the right scientific conclusions. On the other hand, it currently seems unlikely that even carefully optimized MnOx anodes will ever reach the superb OER rates observed for iridium, ruthenium or nickel-iron oxide anodes in acidic or alkaline solutions, respectively. So at the end of the article, two fundamental questions will be addressed: (1) are there technical applications where MnOx materials could actually be the first choice as OER electrocatalysts? and (2) do the results from the last decade of intensive research in this field help to solve a puzzle already formulated in 2008: “Why did nature choose manganese to make oxygen?”.
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Affiliation(s)
- Jens Melder
- Institut für Anorganische und Analytische Chemie und Freiburger Materialforschungszentrum (FMF) , Albert-Ludwigs-Universität Freiburg , Albertstraße 21, 79104 Freiburg , Germany
| | - Peter Bogdanoff
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Institute for Solar Fuels , 14109 Berlin , Germany
| | - Ivelina Zaharieva
- Freie Universität Berlin, Fachbereich Physik , Arnimallee 14, 14195 Berlin , Germany
| | - Sebastian Fiechter
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Institute for Solar Fuels , 14109 Berlin , Germany
| | - Holger Dau
- Freie Universität Berlin, Fachbereich Physik , Arnimallee 14, 14195 Berlin , Germany
| | - Philipp Kurz
- Institut für Anorganische und Analytische Chemie und Freiburger Materialforschungszentrum (FMF) , Albert-Ludwigs-Universität Freiburg , Albertstraße 21, 79104 Freiburg , Germany
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10
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Antoni H, Morales DM, Fu Q, Chen YT, Masa J, Schuhmann W, Muhler M. Oxidative Deposition of Manganese Oxide Nanosheets on Nitrogen-Functionalized Carbon Nanotubes Applied in the Alkaline Oxygen Evolution Reaction. ACS OMEGA 2018; 3:11216-11226. [PMID: 31459231 PMCID: PMC6645440 DOI: 10.1021/acsomega.8b01433] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Accepted: 08/08/2018] [Indexed: 06/10/2023]
Abstract
The development of nonprecious catalysts for water splitting into hydrogen and oxygen is one of the major challenges to meet future sustainable fuel demand. Herein, thin layers of manganese oxide nanosheets supported on nitrogen-functionalized carbon nanotubes (NCNTs) were formed by the treatment of NCNTs dispersed in aqueous solutions of KMnO4 or CsMnO4 under reflux or under hydrothermal (HT) conditions and used as electrocatalysts for the oxygen evolution reaction (OER) in alkaline media. The samples were characterized by X-ray photoelectron spectroscopy, X-ray diffraction, transmission electron microscopy, and Raman spectroscopy. Our results show that the NCNTs treated under reflux were covered by partly amorphous and birnessite-type manganese oxides, while predominantly crystalline birnessite manganese oxide was observed for the hydrothermally treated samples. The latter showed, depending on the temperature during synthesis, an electrocatalytically favorable reduction from birnessite-type MnO2 to γ-MnOOH. OER activity measurements revealed a decrease of the overpotential for the OER at a current density of 10 mA cm-2 from 1.70 VRHE for the bare NCNTs to 1.64 VRHE for the samples treated under reflux in the presence of KMnO4. The hydrothermally treated samples afforded the same current density at a lower potential of 1.60 VRHE and a Tafel slope of 75 mV dec-1, suggesting that the higher OER activity is due to γ-MnOOH formation. Oxidative deposition under reflux conditions using CsMnO4 along with mild HT treatment using KMnO4, and low manganese loadings in both cases, were identified as the most suitable synthetic routes to obtain highly active MnO x /NCNT catalysts for electrochemical water oxidation.
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Affiliation(s)
- Hendrik Antoni
- Laboratory
of Industrial Chemistry and Analytical Chemistry—Center
for Electrochemical Sciences (CES), Ruhr-University
Bochum, Universitätsstr.
150, D-44780 Bochum, Germany
| | - Dulce M. Morales
- Laboratory
of Industrial Chemistry and Analytical Chemistry—Center
for Electrochemical Sciences (CES), Ruhr-University
Bochum, Universitätsstr.
150, D-44780 Bochum, Germany
| | - Qi Fu
- Laboratory
of Industrial Chemistry and Analytical Chemistry—Center
for Electrochemical Sciences (CES), Ruhr-University
Bochum, Universitätsstr.
150, D-44780 Bochum, Germany
| | - Yen-Ting Chen
- Laboratory
of Industrial Chemistry and Analytical Chemistry—Center
for Electrochemical Sciences (CES), Ruhr-University
Bochum, Universitätsstr.
150, D-44780 Bochum, Germany
| | - Justus Masa
- Laboratory
of Industrial Chemistry and Analytical Chemistry—Center
for Electrochemical Sciences (CES), Ruhr-University
Bochum, Universitätsstr.
150, D-44780 Bochum, Germany
| | - Wolfgang Schuhmann
- Laboratory
of Industrial Chemistry and Analytical Chemistry—Center
for Electrochemical Sciences (CES), Ruhr-University
Bochum, Universitätsstr.
150, D-44780 Bochum, Germany
| | - Martin Muhler
- Laboratory
of Industrial Chemistry and Analytical Chemistry—Center
for Electrochemical Sciences (CES), Ruhr-University
Bochum, Universitätsstr.
150, D-44780 Bochum, Germany
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11
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Feizi H, Shiri F, Bagheri R, Singh JP, Chae KH, Song Z, Najafpour MM. The application of a nickel(ii) Schiff base complex in water oxidation: the importance of nanosized materials. Catal Sci Technol 2018. [DOI: 10.1039/c8cy00582f] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The role of Ni oxide in the electrocatalytic water oxidation of a nickel(ii) Schiff base (N,N′-bis (salicylidene) ethylenediamino nickel(ii)) is investigated.
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Affiliation(s)
- Hadi Feizi
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan
- Iran
| | - Farshad Shiri
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan
- Iran
| | - Robabeh Bagheri
- Surface Protection Research Group
- Surface Department
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences
- Ningbo 315201
- China
| | - Jitendra Pal Singh
- Advanced Analysis Center
- Korea Institute of Science and Technology (KIST)
- Seoul 02792
- Republic of Korea
| | - Keun Hwa Chae
- Advanced Analysis Center
- Korea Institute of Science and Technology (KIST)
- Seoul 02792
- Republic of Korea
| | - Zhenlun Song
- Surface Protection Research Group
- Surface Department
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences
- Ningbo 315201
- China
| | - Mohammad Mahdi Najafpour
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan
- Iran
- Center of Climate Change and Global Warming
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12
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Simchi H, Cooley KA, Ohms J, Huang L, Kurz P, Mohney SE. Cosputtered Calcium Manganese Oxide Electrodes for Water Oxidation. Inorg Chem 2017; 57:785-792. [PMID: 29283573 DOI: 10.1021/acs.inorgchem.7b02717] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Calcium manganese oxide films were prepared by cosputter deposition from Mn and CaMnO3 targets and evaluated for their suitability as catalysts for the oxygen evolution reaction (OER). Scanning electron microscopy (SEM) revealed a compact morphology for the as-deposited films and the formation of nanorodlike features on the surfaces after annealing at 600 °C. X-ray-photoelectron-spectroscopy analysis showed that the surface oxidation state is close to +III (as in Mn2O3) for the as-deposited films and increases slightly to a mixture of III and IV after annealing occurs in dry air at 400-600 °C. Glancing-incidence X-ray diffraction (GIXRD) suggested that the CaMnxOy films are amorphous even when heated to 600 °C. However, transmission electron microscopy (TEM) showed that there is actually a polycrystalline component of the film, which best matches Mn3O4 (hausmannite with the average Mn oxidation state of ∼+2.7) but may have a slightly expanded unit cell because of the incorporation of Ca. Electrochemical analyses revealed that the as-deposited CaMnxOy films were OER-inactive. In contrast, annealing at 400 or 600 °C resulted in an increase of ∼15-fold in the current densities, which reached j ≅ 1.5 mA·cm-2 at OER overpotentials of η ≈ 550 mV in cyclic voltammetry (CV) sweeps. For the same η, annealed CaMnxOy electrodes also showed good electrochemical stabilities during 2 h of electrolysis, as rather constant steady-state current densities of j ≅ 0.4-0.5 mA·cm-2 were observed. The thicknesses and surface morphologies of the CaMnxOy films did not change during the electrochemical measurements, indicating that corrosion was negligible. In comparison with a previous study in which Ca-free thin layers of MnOx were evaluated, the results demonstrate that Ca2+ incorporation can enhance the OER activity of MnOx electrocatalysts prepared by sputter deposition. This work provides guidance for designing new electrodes for water oxidation on the basis of the abundant and nontoxic elements manganese and calcium.
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Affiliation(s)
- Hamed Simchi
- Department of Materials Science and Engineering and Materials Research Institute, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
| | - Kayla A Cooley
- Department of Materials Science and Engineering and Materials Research Institute, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
| | - Jonas Ohms
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF), Albert-Ludwigs-Universität Freiburg , Albertstraße 21, 79104 Freiburg, Germany
| | - Lingqin Huang
- Department of Materials Science and Engineering and Materials Research Institute, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
| | - Philipp Kurz
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF), Albert-Ludwigs-Universität Freiburg , Albertstraße 21, 79104 Freiburg, Germany
| | - Suzanne E Mohney
- Department of Materials Science and Engineering and Materials Research Institute, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
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