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Rajput A, Nayak PK, Ghosh D, Chakraborty B. Structural and Electronic Factors behind the Electrochemical Stability of 3D-Metal Tungstates under Oxygen Evolution Reaction Conditions. ACS APPLIED MATERIALS & INTERFACES 2024; 16:28756-28770. [PMID: 38785123 DOI: 10.1021/acsami.4c07301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
Transition metal tungstates (TMTs) possess a wolframite-like lattice structure and preferably form via an electrostatic interaction between a divalent transition metal cation (MII) and an oxyanion of tungsten ([WO4]2-). A unit cell of a TMT is primarily composed of two repeating units, [MO6]oh and [WO6]oh, which are held together via several M-μ2-O-W bridging links. The bond character (ionic or covalent) of this bridging unit determines the stability of the lattice and influences the electronic structure of the bulk TMT materials. Recently, TMTs have been successfully employed as an electrode material for various applications, including electrochemical water splitting. Despite the wide electrocatalytic applications of TMTs, the study of the structure-activity correlation and electronic factors responsible for in situ structural evolution to electroactive species during electrochemical reactions is still in its infancy. Herein, a series of TMTs, MIIWVIO4 (M = Mn/Fe/Co/Ni), have been prepared and employed as electrocatalysts to study the oxygen evolution reaction (OER) under alkaline conditions and to scrutinize the role of transition metals in controlling the energetics of the formation of electroactive species. Since the [WO6]oh unit is common in the TMTs considered, the variation of the central atom of the corresponding [MO6]oh unit plays an intriguing role in controlling the electronic structure and stability of the lattice under anodic potential. Under the OER conditions, a potential-dependent structural transformation of MWO4 is noticed, where MnWO4 appears to be the most labile, whereas NiWO4 is stable up to a high anodic potential of ∼1.68 V (vs RHE). Potential-dependent hydrolytic [WO4]2- dissolution to form MOx active species, traced by in situ Raman and various spectro-/microscopic analyses, can directly be related to the electronic factors of the lattice, viz., crystal field splitting energy (CFSE) of MII in [MO6]oh, formation enthalpy (ΔHf), decomposition enthalpy (ΔHd), and Madelung factor associated with the MWO4 ionic lattice. Additionally, the magnitude of the Löwdin and Bader charges on M of the M-μ2-O-W bond is directly related to the degree of ionicity or covalency in the MWO4 lattice, which indirectly influences the electronic structure and activity. The experimental results substantiated by the computational study explain the electrochemical activity of the TMTs with the help of various structural and electronic factors and bonding interactions in the lattice, which has never been realized. Therefore, the study presented here can be taken as a general guideline to correlate the reactivity to the structure of the inorganic materials.
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Affiliation(s)
- Anubha Rajput
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, 110016 New Delhi, India
| | - Pabitra Kumar Nayak
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, 110016 New Delhi, India
| | - Dibyajyoti Ghosh
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, 110016 New Delhi, India
- Department of Materials Science and Engineering, Indian Institute of Technology Delhi, Hauz Khas, 110016 New Delhi, India
| | - Biswarup Chakraborty
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, 110016 New Delhi, India
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2
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Wang J, Zhao B, Chen X, Liu H, Zhang J. Immersion-Driven Structural Evolution of NiFeS Nanosheets for Efficient Water Splitting. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 14:23. [PMID: 38202478 PMCID: PMC10780408 DOI: 10.3390/nano14010023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 12/11/2023] [Accepted: 12/18/2023] [Indexed: 01/12/2024]
Abstract
The development of low-cost, highly active, and stable electrocatalytic water-splitting catalysts is crucial to solving the current energy crisis and environmental pollution. Herein, a simple two-step conversion strategy is proposed to successfully prepare NiFeS nanosheet structure catalyst through the "immersion-sulfurization" strategy. The self-supported electrode can be prepared in large quantities due to its simple preparation process. As an active substance, NiFeS can grow directly on the NiFe foam substrate, avoiding the use of adhesives or conductive agents, and directly used as electrodes. The as-obtained NiFeS/NFF-300 displays efficient catalytic activity in electrocatalytic water splitting. The overpotential required for OER of the NiFeS/NFF-300 electrode at a current density of 10 mA cm-2 is 230 mV. The electrode underwent a stability test at 10 mA cm-2 for 24 h, and the overpotential remained essentially unchanged, demonstrating excellent stability. Moreover, NiFeS/NFF-300 exhibits considerable HER performances compared with NiFeC2O4/NFF and NiFe foam. The unique nanosheet structure and the presence of Niδ+ and Ni2+ formed by NiFe foam substrate on the NiFeS surface are responsible for its excellent electrocatalytic activity.
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Affiliation(s)
- Jianfeng Wang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, Jingshi Road 17923, Jinan 250061, China;
| | - Bingbing Zhao
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China; (B.Z.); (X.C.); (H.L.)
| | - Xiao Chen
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China; (B.Z.); (X.C.); (H.L.)
| | - Haixia Liu
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China; (B.Z.); (X.C.); (H.L.)
| | - Jie Zhang
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China; (B.Z.); (X.C.); (H.L.)
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Alves ICB, Dos Santos JRN, Marques EP, Sousa JKC, Beluomini MA, Stradiotto NR, Marques ALB. Electrochemical sensor based on carbon nanotube decorated with manganese oxide nanoparticles for naphthalene determination. ANAL SCI 2023; 39:1681-1692. [PMID: 37269536 DOI: 10.1007/s44211-023-00374-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 05/21/2023] [Indexed: 06/05/2023]
Abstract
In this work, an electrochemical sensor was developed for the determination of naphthalene (NaP) in well water samples, based on a glass carbon electrode (GCE) modified as a nanocomposite of manganese oxides (MnOx) and COOH-functionalized multi-walled carbon nanotubes (MWCNT). The synthesis of MnOx nanoparticles was performed by the sol-gel method. The nanocomposite was obtained by mixing MnOx and MWCNT with the aid of ultrasound, followed by stirring for 24 h. Surface modification facilitated the electron transfer process through the MnOx/MWCNT/GCE composite, which was used as an electrochemical sensor. The sensor and its material were characterized by cyclic voltammetry (CV), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). Important parameters influencing electrochemical sensor performance (pH, composite ratios) were investigated and optimized. The MnOx/MWCNT/GCE sensor showed a wide linear range of 2.0-16.0 μM, a detection limit of 0.5 μM and a quantification limit of 1.8 μM, in addition to satisfactory repeatability (RSD of 7.8%) and stability (900 s) in the determination of NaP. The determination of NaP in a sample of water from a gas station well using the proposed sensor showed results with recovery between 98.1 and 103.3%. The results obtained suggest that the MnOx/MWCNT/GCE electrode has great potential for application in the detection of NaP in well water.
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Affiliation(s)
| | | | - Edmar Pereira Marques
- NEEP (LPQA & LAPQAP), PPG-BIONORTE, Federal University of Maranhão (UFMA), São Luis, MA, Brazil
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Qin C, Luo J, Zhang D, Brennan L, Tian S, Berry A, Campbell BM, Sadtler B. Light-Mediated Electrochemical Synthesis of Manganese Oxide Enhances Its Stability for Water Oxidation. ACS NANOSCIENCE AU 2023; 3:310-322. [PMID: 37601919 PMCID: PMC10436374 DOI: 10.1021/acsnanoscienceau.3c00002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 04/07/2023] [Accepted: 04/10/2023] [Indexed: 08/22/2023]
Abstract
New methods are needed to increase the activity and stability of earth-abundant catalysts for electrochemical water splitting to produce hydrogen fuel. Electrodeposition has been previously used to synthesize manganese oxide films with a high degree of disorder and a mixture of oxidation states for Mn, which has led to electrocatalysts with high activity but low stability for the oxygen evolution reaction (OER) at high current densities. In this study, we show that multipotential electrodeposition of manganese oxide under illumination produces nanostructured films with significantly higher stability for the OER compared to films grown under otherwise identical conditions in the dark. Manganese oxide films grown by multipotential deposition under illumination sustain a current density of 10 mA/cm2 at 2.2 V versus reversible hydrogen electrode for 18 h (pH 13). Illumination does not enhance the activity or stability of manganese oxide films grown using a constant potential, and films grown by multipotential deposition in the dark undergo a complete loss of activity within 1 h of electrolysis. Electrochemical and structural characterization indicate that photoexcitation of the films during growth reduces Mn ions and changes the content and structure of intercalated potassium ions and water molecules in between the disordered layers of birnessite-like sheets of MnOx, which stabilizes the nanostructured film during electrocatalysis. These results demonstrate that combining multiple external stimuli (i.e., light and an external potential) can induce structural changes not attainable by either stimulus alone to make earth-abundant catalysts more active and stable for important chemical transformations such as water oxidation.
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Affiliation(s)
- Chu Qin
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130, United States
| | - Jiang Luo
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130, United States
| | - Dongyan Zhang
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130, United States
| | - Logan Brennan
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130, United States
| | - Shijun Tian
- Department
of Physics, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
| | - Ashlynn Berry
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130, United States
| | - Brandon M. Campbell
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130, United States
| | - Bryce Sadtler
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130, United States
- Institute
of Materials Science & Engineering, Washington University, St. Louis, Missouri 63130, United States
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Zhou Y, Guan P, Chen F, Feng Z, Jia H, Liang T, Li M, Wan T, Tian R, Han Z, Chu D. Engineering work functions of cobalt-doped manganese oxide based electrocatalysts for highly efficient oxygen evolution reaction. J Colloid Interface Sci 2023; 642:23-28. [PMID: 37001454 DOI: 10.1016/j.jcis.2023.03.129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 03/15/2023] [Accepted: 03/20/2023] [Indexed: 03/30/2023]
Abstract
The crystalline and electronic structures are two important factors for the design of electrocatalysts. In this work, Co-doped MnO electrocatalysts grown on nickel foam (NF) were prepared by a facile hydrothermal reaction, followed by H2 treatment process. The electrocatalytic performance of MnO was significantly improved after doping with Co and the Co0.1Mn0.9O-NF sample achieved excellent oxygen evolution reaction (OER) performance with low overpotential (370 mV at 10 mA cm-2) and reasonable Tafel slope (85.6 mV dec-1). Significantly, the low work function was obtained in the Co0.1Mn0.9O-NF sample (4.37 eV), which could accelerate the charge transfer process of the OER activity. The excellent OER performance of the Co0.1Mn0.9O-NF sample is also attributed to the rich active sites, which improved electrical conductivity and enlarged electrochemical surface areas.
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Hu J, Zhou Y, Liu Y, Xu Z, Li H. Recent Advances in Manganese-Based Materials for Electrolytic Water Splitting. Int J Mol Sci 2023; 24:ijms24076861. [PMID: 37047832 PMCID: PMC10095233 DOI: 10.3390/ijms24076861] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Revised: 04/03/2023] [Accepted: 04/04/2023] [Indexed: 04/14/2023] Open
Abstract
Developing earth-abundant and highly effective electrocatalysts for electrocatalytic water splitting is a prerequisite for the upcoming hydrogen energy society. Recently, manganese-based materials have been one of the most promising candidates to replace noble metal catalysts due to their natural abundance, low cost, adjustable electronic properties, and excellent chemical stability. Although some achievements have been made in the past decades, their performance is still far lower than that of Pt. Therefore, further research is needed to improve the performance of manganese-based catalytic materials. In this review, we summarize the research progress on the application of manganese-based materials as catalysts for electrolytic water splitting. We first introduce the mechanism of electrocatalytic water decomposition using a manganese-based electrocatalyst. We then thoroughly discuss the optimization strategy used to enhance the catalytic activity of manganese-based electrocatalysts, including doping and defect engineering, interface engineering, and phase engineering. Finally, we present several future design opportunities for highly efficient manganese-based electrocatalysts.
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Affiliation(s)
- Jing Hu
- School of Energy and Environment, Anhui University of Technology, Ma'anshan 243002, China
| | - Yuru Zhou
- School of Energy and Environment, Anhui University of Technology, Ma'anshan 243002, China
| | - Yinan Liu
- School of Energy and Environment, Anhui University of Technology, Ma'anshan 243002, China
| | - Zhichao Xu
- School of Energy and Environment, Anhui University of Technology, Ma'anshan 243002, China
| | - Haijin Li
- School of Energy and Environment, Anhui University of Technology, Ma'anshan 243002, China
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Modifying acidic oxygen production properties of PbO2 by porous Mn2O3 microspheres for boosting stability. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.141221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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8
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Tailoring the oxide surface composition of stainless steel for improved OER performance in alkaline water electrolysis. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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9
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α-MnO2 Nanowire Structure Obtained at Low Temperature with Aspects in Environmental Remediation and Sustainable Energy Applications. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12136821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Hydrothermally obtained α-MnO2 nanowire characterizations confirm the tetragonal crystalline structure that is several micrometers long and 20–30 nm in diameter with narrow distributions in their dimensions. The absorption calculated from diffuse reflectance of α-MnO2 occurred in the visible region ranging from 400 to 550 nm. The calculated band gap with Quantum Espresso using HSE approximation is ~2.4 eV for the ferromagnetic case, with a slightly larger gap of 2.7 eV for the antiferromagnetic case, which is blue-shifted as compared to the experimental. The current work also illustrates the transformations that occur in the material under heat treatment during TGA analysis, with the underlying mechanism. Electrochemical studies on graphite supports modified with α-MnO2 compositions revealed the modified electrode with the highest electric double-layer capacitance of 3.444 mF cm−2. The degradation rate of an organic dye—rhodamine B (RhB)—over the compound in an acidic medium was used to examine the catalytic and photocatalytic activities of α-MnO2. The peak shape changes in the time-dependent visible spectra of RhB during the photocatalytic reaction were more complex and progressive. In two hours, RhB degradation reached 97% under sun irradiation and 74% in the dark.
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10
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Ibrahim S, Mohsin Saleem M, Imran M, Ali Shah W, Cordes D, M. Z. Slawin A, Arif Nadeem M. A two-dimensional manganese-containing coordination polymer for efficient catalysis of the oxygen evolution. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.121030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Becker S, Behrens M. Oxygen evolving reactions catalyzed by different manganese oxides: the role of oxidation state and specific surface area. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2022. [DOI: 10.1515/znb-2022-0009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
A set of the four manganese oxide powders α-MnO2 (hollandite), δ-MnO2 (birnessite), Mn2O3 (bixbyite), and Mn3O4 (hausmannite) have been synthesized in a phase-pure form and tested as catalysts in three different oxygen evolution reactions (OER): electrochemical OER in KOH (1 mol L−1), chemical OER using aqueous cerium ammonium nitrate, and H2O2 decomposition. The trends in electrochemical (hollandite >> bixbyite > birnessite > hausmannite) and chemical OER (hollandite > birnessite > bixbyite > hausmannite) are different, which can be explained by differences in electric conductivity. H2O2 decomposition and chemical OER, on the other hand, showed the same trend and even a linear correlation of their initial OER rates. A linear correlation between the catalytic performance and the manganese oxidation state of the catalysts was observed. Another trend was observed related to the specific surface area, highlighting the importance of these properties for the OER. Altogether, hollandite was found to be the best performing catalyst in this study due to a combination of the high manganese oxidation state and a large specific surface area. Likely, due to a sufficient electrical conductivity, this intrinsically high OER performance is also found to some extent in electrocatalysis for this specific example.
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Affiliation(s)
- Stefanie Becker
- Universität Duisburg-Essen, Fakultät für Chemie , Universitätsstraße 7 , 45114 Essen , Germany
| | - Malte Behrens
- Universität Duisburg-Essen, Fakultät für Chemie , Universitätsstraße 7 , 45114 Essen , Germany
- Christian-Albrechts-Universität zu Kiel, Institut für Anorganische Chemie , May-Eyth-Straße 2 , 24118 Kiel , Germany
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12
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Heese‐Gärtlein J, Rabe A, Behrens M. Challenges in the Application of Manganese Oxide Powders as OER Electrocatalysts: Synthesis, Characterization, Activity and Stability of Nine Different Mn
x
O
y
Compounds. Z Anorg Allg Chem 2021. [DOI: 10.1002/zaac.202000180] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Justus Heese‐Gärtlein
- University of Duisburg-Essen Faculty of Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE) Universitätsstr. 7 45141 Essen Germany
| | - Anna Rabe
- University of Duisburg-Essen Faculty of Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE) Universitätsstr. 7 45141 Essen Germany
| | - Malte Behrens
- University of Duisburg-Essen Faculty of Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE) Universitätsstr. 7 45141 Essen Germany
- Ertl Center for Electrochemistry and Catalysis Gwangju Institute of Science (GIST) 123 Cheomdan-gwagiro (Oryang-dong), Buk-gu Gwangju 500-712 South Korea
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Imani AH, Ojani R, Raoof JB. Novel polyoxometalate-based composite as efficient electrocatalyst for alkaline water oxidation reaction. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2021. [DOI: 10.1007/s13738-021-02169-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Plate P, Höhn C, Bloeck U, Bogdanoff P, Fiechter S, Abdi FF, van de Krol R, Bronneberg AC. On the Origin of the OER Activity of Ultrathin Manganese Oxide Films. ACS APPLIED MATERIALS & INTERFACES 2021; 13:2428-2436. [PMID: 33426879 DOI: 10.1021/acsami.0c15977] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
There is an urgent need for cheap, stable, and abundant catalyst materials for photoelectrochemical water splitting. Manganese oxide is an interesting candidate as an oxygen evolution reaction (OER) catalyst, but the minimum thickness above which MnOx thin films become OER-active has not yet been established. In this work, ultrathin (<10 nm) manganese oxide films are grown on silicon by atomic layer deposition to study the origin of OER activity under alkaline conditions. We found that MnOx films thinner than 1.5 nm are not OER-active. X-ray photoelectron spectroscopy shows that this is due to electrostatic catalyst-support interactions that prevent the electrochemical oxidation of the manganese ions close to the interface with the support, while in thicker films, MnIII and MnIV oxide layers appear as OER-active catalysts after oxidation and electrochemical treatment. From our investigations, it can be concluded that one MnIII,IV-O monolayer is sufficient to establish oxygen evolution under alkaline conditions. The results of this study provide important new design criteria for ultrathin manganese oxide oxygen evolution catalysts.
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Affiliation(s)
- Paul Plate
- Institute for Solar Fuels, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
| | - Christian Höhn
- Institute for Solar Fuels, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
| | - Ulrike Bloeck
- Institute for Solar Fuels, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
| | - Peter Bogdanoff
- Institute for Solar Fuels, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
| | - Sebastian Fiechter
- Institute for Solar Fuels, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
| | - Fatwa F Abdi
- Institute for Solar Fuels, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
| | - Roel van de Krol
- Institute for Solar Fuels, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
- Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 124, 10623 Berlin, Germany
| | - Aafke C Bronneberg
- Institute for Solar Fuels, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
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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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Natarajan K, Saraf M, Gupta AK, Mobin SM. Nanostructured δ-MnO2/Cd(OH)2 Heterojunction Constructed under Ambient Conditions as a Sustainable Cathode for Photocatalytic Hydrogen Production. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c00341] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Balaghi SE, Triana CA, Patzke GR. Molybdenum-Doped Manganese Oxide as a Highly Efficient and Economical Water Oxidation Catalyst. ACS Catal 2020. [DOI: 10.1021/acscatal.9b02718] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- S. Esmael Balaghi
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - C. A. Triana
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Greta R. Patzke
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
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Connor P, Schuch J, Kaiser B, Jaegermann W. The Determination of Electrochemical Active Surface Area and Specific Capacity Revisited for the System MnOx as an Oxygen Evolution Catalyst. ACTA ACUST UNITED AC 2020. [DOI: 10.1515/zpch-2019-1514] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
In the last decades several different catalysts for the electrochemical water splitting reaction have been designed and tested. In so-called benchmark papers they are compared with respect to their efficiency and activity. In order to relate the different catalyst to each other the definition of well-defined procedures is required. Two different methods are mainly used: Either the normalization with respect to the geometric surface area or to the catalyst loading. Most often only one of these values is available for a sample and the other one cannot be estimated easily. One approach in electrocatalysis is to determine the Helmholtz double layer capacitance (DLC) and deduce the electrochemical active surface area (ECSA). The DLC can be obtained from two different methods, either using differential capacitance measurement (DCM) or impedance spectroscopy (EIS). The second value needed for the calculation of the ECSA is the specific capacitance, which is the capacitance for a perfectly flat surface of given catalyst material. Here, we present the determination of the different capacitance values using manganese oxide as the exemplary model for the oxygen evolution reaction (OER). We determine the capacitance by DCM and EIS to calculate the ECSA using literature values for the specific capacitance. The obtained values are comparable from the two methods, but are much larger than the surface areas obtained by atomic force microscopy. Therefore, we consider the possibility of using the measured AFM area together with the Helmholtz capacitance to determine the specific capacitances for this material class. The comparison of these results with literature values illustrates the actual limits of the ECSA method, which will be discussed in this paper.
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Affiliation(s)
- Paula Connor
- Materialwissenschaft, Oberflächenforschung , Otto-Berndt-Straße 3 , Darmstadt, Hessen 64287 , Germany
| | - Jona Schuch
- Materialwissenschaft, Oberflächenforschung , Otto-Berndt-Straße 3 , Darmstadt, Hessen 64287 , Germany
| | - Bernhard Kaiser
- Materialwissenschaft, Oberflächenforschung , Otto-Berndt-Straße 3 , Darmstadt, Hessen 64287 , Germany
| | - Wolfram Jaegermann
- Materialwissenschaft, Oberflächenforschung , Otto-Berndt-Straße 3 , Darmstadt, Hessen 64287 , Germany
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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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Tolstoy V, Vladimirova NI, Gulina LB. Formation of Ordered Honeycomb-like Structures of Manganese Oxide 2D Nanocrystals with the Birnessite-like Structure and Their Electrocatalytic Properties during Oxygen Evolution Reaction upon Water Splitting in an Alkaline Medium. ACS OMEGA 2019; 4:22203-22208. [PMID: 31891103 PMCID: PMC6933803 DOI: 10.1021/acsomega.9b03499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Accepted: 12/04/2019] [Indexed: 06/10/2023]
Abstract
In this work, a chemical reaction between gaseous ozone and aqueous solution of Mn(CH3COO)2 in drops has been researched. It has been shown that the formation of H x MnO2·nH2O nanocrystals with a morphology of nanosheets and a birnessite-like crystal structure with a thickness of 5-8 nm is observed on the surface of drops. These nanocrystals are oriented spontaneously to the solution-gas interface and constitute peculiar ribbons with a width of 1-2 μm, some of which form ordered honeycomb structures (OHS) with a 5-20 μm cell size. To explain the observed effect, the scheme of chemical reactions that take place at the interface between the surface of a drop and ozone has been modeled, and it can be described using a diffusion pattern model taking into account the action of "force fields" on the surface of a drop, which arise due to its curvature. After the drop is dried, these structures practically retain their morphology and form a fractal structure with a geometric area equal to the area of the drop base on the surface of the substrate. The study of the electrocatalytic properties of these structures revealed that they are active electrocatalysts in the oxygen evolution reaction (OER) during water electrolysis in alkaline medium. The most efficient of the obtained electrocatalysts are characterized by an overpotential value of 284 mV at a current of 10 mA/cm2 and the Tafel coefficient of 37.7 mV/dec and are currently one of the best among pure manganese oxides. Finally, it has also been assumed that this effect is explained by the morphological features of the structures obtained, which contribute to the removal of oxygen bubbles from the electrode surface during electrolysis.
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Baumung M, Kollenbach L, Xi L, Risch M. Undesired Bulk Oxidation of LiMn 2 O 4 Increases Overpotential of Electrocatalytic Water Oxidation in Lithium Hydroxide Electrolytes. Chemphyschem 2019; 20:2981-2988. [PMID: 31359564 PMCID: PMC6899966 DOI: 10.1002/cphc.201900601] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 07/26/2019] [Indexed: 11/23/2022]
Abstract
Chemical and structural changes preceding electrocatalysis obfuscate the nature of the active state of electrocatalysts for the oxygen evolution reaction (OER), which calls for model systems to gain systematic insight. We investigated the effect of bulk oxidation on the overpotential of ink-casted LiMn2 O4 electrodes by a rotating ring-disk electrode (RRDE) setup and X-ray absorption spectroscopy (XAS) at the K shell core level of manganese ions (Mn-K edge). The cyclic voltammogram of the RRDE disk shows pronounced redox peaks in lithium hydroxide electrolytes with pH between 12 and 13.5, which we assign to bulk manganese redox based on XAS. The onset of the OER is pH-dependent on the scale of the reversible hydrogen electrode (RHE) with a Nernst slope of -40(4) mV/pH at -5 μA monitored at the RRDE ring. To connect this trend to catalyst changes, we develop a simple model for delithiation of LiMn2 O4 in LiOH electrolytes, which gives the same Nernst slope of delithiation as our experimental data, i. e., 116(25) mV/pH. From this data, we construct an ERHE -pH diagram that illustrates robustness of LiMn2 O4 against oxidation above pH 13.5 as also verified by XAS. We conclude that manganese oxidation is the origin of the increase of the OER overpotential at pH lower than 14 and also of the pH dependence on the RHE scale. Our work highlights that vulnerability to transition metal redox may lead to increased overpotentials, which is important for the design of stable electrocatalysts.
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Affiliation(s)
- Max Baumung
- Georg-August-Universität GöttingenInstitut für MaterialphysikFriedrich-Hund-Platz 137077GöttingenGermany
| | - Leon Kollenbach
- Georg-August-Universität GöttingenInstitut für MaterialphysikFriedrich-Hund-Platz 137077GöttingenGermany
| | - Lifei Xi
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Nachwuchsgruppe Gestaltung des SauerstoffentwicklungsmechanismusHahn-Meitner-Platz 114109BerlinGermany
| | - Marcel Risch
- Georg-August-Universität GöttingenInstitut für MaterialphysikFriedrich-Hund-Platz 137077GöttingenGermany
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Nachwuchsgruppe Gestaltung des SauerstoffentwicklungsmechanismusHahn-Meitner-Platz 114109BerlinGermany
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22
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The evaluation of the long-term stability of α-MnO2 based OER electrocatalyst in neutral medium by using data processing approach. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.06.016] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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An H, Chen Z, Yang J, Feng Z, Wang X, Fan F, Li C. An Operando-Raman study on oxygen evolution of manganese oxides: Roles of phase composition and amorphization. J Catal 2018. [DOI: 10.1016/j.jcat.2018.08.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Khan MA, Zhao H, Zou W, Chen Z, Cao W, Fang J, Xu J, Zhang L, Zhang J. Recent Progresses in Electrocatalysts for Water Electrolysis. ELECTROCHEM ENERGY R 2018. [DOI: 10.1007/s41918-018-0014-z] [Citation(s) in RCA: 186] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Abstract
The study of hydrogen evolution reaction and oxygen evolution reaction electrocatalysts for water electrolysis is a developing field in which noble metal-based materials are commonly used. However, the associated high cost and low abundance of noble metals limit their practical application. Non-noble metal catalysts, aside from being inexpensive, highly abundant and environmental friendly, can possess high electrical conductivity, good structural tunability and comparable electrocatalytic performances to state-of-the-art noble metals, particularly in alkaline media, making them desirable candidates to reduce or replace noble metals as promising electrocatalysts for water electrolysis. This article will review and provide an overview of the fundamental knowledge related to water electrolysis with a focus on the development and progress of non-noble metal-based electrocatalysts in alkaline, polymer exchange membrane and solid oxide electrolysis. A critical analysis of the various catalysts currently available is also provided with discussions on current challenges and future perspectives. In addition, to facilitate future research and development, several possible research directions to overcome these challenges are provided in this article.
Graphical Abstract
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25
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Sagu JS, Mehta D, Wijayantha KU. Electrocatalytic activity of CoFe2O4 thin films prepared by AACVD towards the oxygen evolution reaction in alkaline media. Electrochem commun 2018. [DOI: 10.1016/j.elecom.2017.12.017] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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26
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Walter C, Menezes PW, Orthmann S, Schuch J, Connor P, Kaiser B, Lerch M, Driess M. A Molecular Approach to Manganese Nitride Acting as a High Performance Electrocatalyst in the Oxygen Evolution Reaction. Angew Chem Int Ed Engl 2018; 57:698-702. [DOI: 10.1002/anie.201710460] [Citation(s) in RCA: 110] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Indexed: 01/02/2023]
Affiliation(s)
- Carsten Walter
- Department of Chemistry, Metalorganics and Inorganic MaterialsTechnische Universität Berlin Strasse des 17. Juni 135, Sekr. C2 10623 Berlin Germany
| | - Prashanth W. Menezes
- Department of Chemistry, Metalorganics and Inorganic MaterialsTechnische Universität Berlin Strasse des 17. Juni 135, Sekr. C2 10623 Berlin Germany
| | - Steven Orthmann
- Department of ChemistrySolid State ChemistryTechnische Universität Berlin Strasse des 17. Juni 135, Sekr. C2 10623 Berlin Germany
| | - Jona Schuch
- Institute of Material ScienceTechnische Universität Darmstadt Jovanka-Bontschits-Straße 2 64287 Darmstadt Germany
| | - Paula Connor
- Institute of Material ScienceTechnische Universität Darmstadt Jovanka-Bontschits-Straße 2 64287 Darmstadt Germany
| | - Bernhard Kaiser
- Institute of Material ScienceTechnische Universität Darmstadt Jovanka-Bontschits-Straße 2 64287 Darmstadt Germany
| | - Martin Lerch
- Department of ChemistrySolid State ChemistryTechnische Universität Berlin Strasse des 17. Juni 135, Sekr. C2 10623 Berlin Germany
| | - Matthias Driess
- Department of Chemistry, Metalorganics and Inorganic MaterialsTechnische Universität Berlin Strasse des 17. Juni 135, Sekr. C2 10623 Berlin Germany
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27
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Walter C, Menezes PW, Orthmann S, Schuch J, Connor P, Kaiser B, Lerch M, Driess M. A Molecular Approach to Manganese Nitride Acting as a High Performance Electrocatalyst in the Oxygen Evolution Reaction. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201710460] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Carsten Walter
- Department of Chemistry, Metalorganics and Inorganic MaterialsTechnische Universität Berlin Strasse des 17. Juni 135, Sekr. C2 10623 Berlin Germany
| | - Prashanth W. Menezes
- Department of Chemistry, Metalorganics and Inorganic MaterialsTechnische Universität Berlin Strasse des 17. Juni 135, Sekr. C2 10623 Berlin Germany
| | - Steven Orthmann
- Department of ChemistrySolid State ChemistryTechnische Universität Berlin Strasse des 17. Juni 135, Sekr. C2 10623 Berlin Germany
| | - Jona Schuch
- Institute of Material ScienceTechnische Universität Darmstadt Jovanka-Bontschits-Straße 2 64287 Darmstadt Germany
| | - Paula Connor
- Institute of Material ScienceTechnische Universität Darmstadt Jovanka-Bontschits-Straße 2 64287 Darmstadt Germany
| | - Bernhard Kaiser
- Institute of Material ScienceTechnische Universität Darmstadt Jovanka-Bontschits-Straße 2 64287 Darmstadt Germany
| | - Martin Lerch
- Department of ChemistrySolid State ChemistryTechnische Universität Berlin Strasse des 17. Juni 135, Sekr. C2 10623 Berlin Germany
| | - Matthias Driess
- Department of Chemistry, Metalorganics and Inorganic MaterialsTechnische Universität Berlin Strasse des 17. Juni 135, Sekr. C2 10623 Berlin Germany
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