1
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Wu Z, Wang T, Zou JJ, Li Y, Zhang C. Amorphous Nickel Oxides Supported on Carbon Nanosheets as High-Performance Catalysts for Electrochemical Synthesis of Hydrogen Peroxide. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01829] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zekun Wu
- State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Applied Catalysis, Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Tianzuo Wang
- State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Applied Catalysis, Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Ji-Jun Zou
- State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Applied Catalysis, Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Yongdan Li
- State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Applied Catalysis, Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
- Department of Chemical and Metallurgical Engineering, School of Chemical Engineering, Aalto University, Kemistintie 1, Espoo, P.O. Box 16100, FI-00076 Aalto, Finland
| | - Cuijuan Zhang
- State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Applied Catalysis, Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
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2
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Bai F, He Y, Xu L, Wang Y, Wang Y, Hao Z, Li F. Improved ORR/OER bifunctional catalytic performance of amorphous manganese oxides prepared by photochemical metal-organic deposition. RSC Adv 2022; 12:2408-2415. [PMID: 35425262 PMCID: PMC8979087 DOI: 10.1039/d1ra08618a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 01/10/2022] [Indexed: 11/21/2022] Open
Abstract
Transition metal oxide nanomaterials or nanocomposites containing transition metal oxides have the potential to replace traditional catalysts for electrochemical applications, photocatalysis, and energy storage. Amorphous manganese oxide catalysts were prepared via photochemical metal-organic deposition (PMOD). Through XRD, SEM-EDS, Raman spectroscopy, FTIR spectroscopy, HRTEM-EDS, and XPS, we confirmed that amorphous manganese oxide catalysts were successfully prepared. Amorphous catalysts prepared with different photolysis times were compared in terms of their performance for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), and catalyst MnO x -PMOD48 showed the best performance because of its high Mn3+ proportion and electrochemically active surface area. MnO x -PMOD48 showed better ORR/OER performance than the crystalline MnO x and MnO x /Ti4O7 catalysts from our previous work. Following our previous work on crystalline manganese oxide catalysts, we added Ti4O7 during the PMOD process with 48 h of treatment and obtained the amorphous catalyst MnO x /Ti4O7-PMOD. MnO x /Ti4O7-PMOD was supported by Ti4O7 particles, which led to improved stability. The ORR/OER catalytic activity of MnO x /Ti4O7-PMOD was better than that of crystalline catalyst MnO x /Ti4O7-300, which was the best crystalline catalyst in our previous work. We also compared lithium-oxygen batteries assembled with MnO x /Ti4O7-PMOD and MnO x /Ti4O7-300. The battery performance tests confirmed that the amorphous manganese catalyst had better ORR/OER bifunctional catalytic performance than the crystalline manganese catalyst because of its high defect state with more abundant edge active sites and more surface-exposed catalytic active sites.
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Affiliation(s)
- Fan Bai
- Faculty of Environment and Life Sciences, Beijing University of Technology Beijing 100124 P. R. China
| | - Yuxiu He
- Beijing Office of Metrohm China Ltd Beijing 100085 P. R. China
| | - Lincheng Xu
- Faculty of Environment and Life Sciences, Beijing University of Technology Beijing 100124 P. R. China
- College of Chemistry, Baotou Teachers College Bao Tou 014030 P. R. China
| | - Yue Wang
- Faculty of Environment and Life Sciences, Beijing University of Technology Beijing 100124 P. R. China
| | - Yan Wang
- Faculty of Environment and Life Sciences, Beijing University of Technology Beijing 100124 P. R. China
| | - Zhanzhong Hao
- College of Chemistry, Baotou Teachers College Bao Tou 014030 P. R. China
| | - Fan Li
- Faculty of Environment and Life Sciences, Beijing University of Technology Beijing 100124 P. R. China
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3
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Hansima MACK, Makehelwala M, Jinadasa KBSN, Wei Y, Nanayakkara KGN, Herath AC, Weerasooriya R. Fouling of ion exchange membranes used in the electrodialysis reversal advanced water treatment: A review. CHEMOSPHERE 2021; 263:127951. [PMID: 33297020 DOI: 10.1016/j.chemosphere.2020.127951] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 08/05/2020] [Accepted: 08/07/2020] [Indexed: 06/12/2023]
Abstract
Electrodialysis self-reversal (EDR) technology has attracted in the treatment of water for domestic and industrial uses. The self-reversal consists of a frequent reversal of the direction of current between the EDR-cell electrodes to combat fouling of ion exchange membranes (IEMs). Irrespective of the EDR self-cleaning processes, the role of natural organic matter and their complexing ability with metal ions on IEMs fouling is partially understood. The objective of this review is to identify the research gaps present in the elucidation of IEM fouling routes. The common IEMs' foulants are identified, and several fouling mechanisms are briefly discussed. The effectiveness of self-cleaning mechanisms to reduce IEMs fouling is also be discussed. Dissolved organic carbon (DOC) possesses high chelation which forms metal complexes with di and trivalent cations found in water. The role of ternary complexes, e.g. M2+/3+-DOC and membrane surface, on membrane fouling via surface bridging, are also addressed. Finally, mitigation methods of IEMs membrane fouling are also discussed.
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Affiliation(s)
- M A C K Hansima
- Post Graduate Institute of Science (PGIS), University of Peradeniya, Peradeniya, 20400, Sri Lanka
| | - Madhubhashini Makehelwala
- NSF Project, Department of Civil Engineering, Faculty of Engineering, University of Peradeniya, Peradeniya, 20400, Sri Lanka; China-Sri Lanka Joint Research and Demonstration Center for Water Technology, Ministry of Water Supply, Sri Lanka.
| | - K B S N Jinadasa
- Department of Civil Engineering, Faculty of Engineering, University of Peradeniya, Peradeniya, 20400, Sri Lanka
| | - Yuansong Wei
- Department of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; National Centre for Water Quality Research, National Institute of Fundamental Studies, Kandy, 20000, Sri Lanka
| | - K G N Nanayakkara
- Department of Civil Engineering, Faculty of Engineering, University of Peradeniya, Peradeniya, 20400, Sri Lanka
| | - Ajith C Herath
- Department of Chemical Sciences, Rajarata University of Sri Lanka, Mihinthale, 50300, Sri Lanka
| | - Rohan Weerasooriya
- National Centre for Water Quality Research, National Institute of Fundamental Studies, Kandy, 20000, Sri Lanka
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4
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Pan L, Wang Q, Li Y, Zhang C. Amorphous cobalt-cerium binary metal oxides as high performance electrocatalyst for oxygen evolution reaction. J Catal 2020. [DOI: 10.1016/j.jcat.2020.02.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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5
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Zhang M, Antony RP, Chiam SY, Abdi FF, Wong LH. Understanding the Roles of NiO x in Enhancing the Photoelectrochemical Performance of BiVO 4 Photoanodes for Solar Water Splitting. CHEMSUSCHEM 2019; 12:2022-2028. [PMID: 30246933 DOI: 10.1002/cssc.201801780] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 09/21/2018] [Indexed: 06/08/2023]
Abstract
Solar water oxidation is considered as a promising method for efficient utilization of solar energy and bismuth vanadate (BiVO4 ) is a potential photoanode. Catalyst loading on BiVO4 is often used to tackle the limitations of charge recombination and sluggish kinetics. In this study, amorphous nickel oxide (NiOx ) is loaded onto Mo-doped BiVO4 by photochemical metal-organic deposition method. The resulting NiOx /Mo:BiVO4 photoanodes demonstrate a two-fold improvement in photocurrent density (2.44 mA cm-2 ) at 1.23 V versus reversible hydrogen electrode (RHE) compared with the uncatalyzed samples. After NiOx modification the charge-separation and charge-transfer efficiencies improve significantly across the entire potential range. It is further elucidated by open-circuit photovoltage (OCP), time-resolved-microwave conductivity (TRMC), and rapid-scan voltammetry (RSV) measurements that NiOx modification induces larger band bending and promotes efficient charge transfer on the surface of BiVO4 . This work provides insight into designing BiVO4 -catalyst assemblies by using a simple surface-modification route for efficient solar water oxidation.
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Affiliation(s)
- Mengyuan Zhang
- School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, Singapore, 639798, Singapore
| | - Rajini P Antony
- School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, Singapore, 639798, Singapore
- Chemistry Division, Chemistry Group, Bhabha Atomic Research Center, Mumbai, 400085, India
| | - Sing Yang Chiam
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), Innovis, 2 Fusionopolis Way, Singapore, 138634, Singapore
| | - Fatwa Firdaus Abdi
- Institute for Solar Fuels, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner-Platz 1, Berlin, 14109, Germany
| | - Lydia Helena Wong
- School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, Singapore, 639798, Singapore
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6
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Venderbosch B, Oudsen JPH, Wolzak LA, Martin DJ, Korstanje TJ, Tromp M. Spectroscopic Investigation of the Activation of a Chromium-Pyrrolyl Ethene Trimerization Catalyst. ACS Catal 2019; 9:1197-1210. [PMID: 30775066 PMCID: PMC6369658 DOI: 10.1021/acscatal.8b03414] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2018] [Revised: 12/17/2018] [Indexed: 11/28/2022]
Abstract
![]()
1-Hexene
is an important α-olefin for polyethylene production
and is produced from ethene. Recent developments in the α-olefin
industry have led to the successful commercialization of ethene trimerization
catalysts. An important industrially applied ethene trimerization
system uses a mixture of chromium 2-ethylhexanoate, AlEt3, AlEt2Cl, and 2,5-dimethylpyrrole (DMP). Here, we have
studied the activation of this system using catalytic and spectroscopic
experiments (XAS, EPR, and UV–vis) under conditions employed
in industry. First, chromium 2-ethylhexanoate was prepared and characterized
to be [Cr3O(RCO2)6(H2O)3]Cl. Next, the activation of chromium 2-ethylhexanoate with
AlEt3, AlEt2Cl, and DMP was studied, showing
immediate reduction (<5 ms) of the trinuclear Cr(III) carboxylate
and formation of a neutral polynuclear Cr(II) carboxylate complex.
Over time, this Cr(II) carboxylate complex is partially converted
into a chloro-bridged dinuclear Cr(II) pyrrolyl complex. In cyclohexane,
small quantities of an unknown Cr(I) complex (∼1% after 1 h)
are observed, while in toluene, the quantity of Cr(I) is much higher
(∼23% after 1 h). This is due to the formation of cationic
bis(tolyl)Cr(I) complexes, which likely leads to the observed inferior
performance using toluene as the reaction solvent. Catalytic studies
allow us to exclude some of the observed Cr(I) and Cr(II) complexes
as the active species in this catalytic system. Using this combination
of techniques, we have been able to structurally characterize complexes
of this selective Cr-catalyzed trimerization system under conditions
which are employed in industry.
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Affiliation(s)
- Bas Venderbosch
- Sustainable Materials Characterization, van ’t Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Jean-Pierre H. Oudsen
- Sustainable Materials Characterization, van ’t Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Lukas A. Wolzak
- Sustainable Materials Characterization, van ’t Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - David J. Martin
- Sustainable Materials Characterization, van ’t Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Ties J. Korstanje
- Sustainable Materials Characterization, van ’t Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Moniek Tromp
- Sustainable Materials Characterization, van ’t Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
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7
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Jain V, Bonita Y, Brown A, Taconi A, Hicks JC, Rai N. Mechanistic insights into hydrodeoxygenation of phenol on bimetallic phosphide catalysts. Catal Sci Technol 2018. [DOI: 10.1039/c8cy00977e] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Different binding modes of the reactant on different catalysts determine the hydrodeoxygenation selectivity.
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Affiliation(s)
- Varsha Jain
- Dave C. Swalm School of Chemical Engineering and Center for Advanced Vehicular Systems
- Mississippi State University
- Mississippi State
- USA
| | - Yolanda Bonita
- Department of Chemical and Biomolecular Engineering
- University of Notre Dame
- USA
| | - Alicia Brown
- Dave C. Swalm School of Chemical Engineering and Center for Advanced Vehicular Systems
- Mississippi State University
- Mississippi State
- USA
| | - Anna Taconi
- Dave C. Swalm School of Chemical Engineering and Center for Advanced Vehicular Systems
- Mississippi State University
- Mississippi State
- USA
| | - Jason C. Hicks
- Department of Chemical and Biomolecular Engineering
- University of Notre Dame
- USA
| | - Neeraj Rai
- Dave C. Swalm School of Chemical Engineering and Center for Advanced Vehicular Systems
- Mississippi State University
- Mississippi State
- USA
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8
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Wu BE, Chiang CY. Photochemical metal organic deposition of FeO x catalyst on BiVO 4 for improving solar-driven water oxidation efficiency. J Taiwan Inst Chem Eng 2017. [DOI: 10.1016/j.jtice.2017.09.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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9
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10
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Zhang C, Berlinguette CP, Trudel S. Water oxidation catalysis: an amorphous quaternary Ba-Sr-Co-Fe oxide as a promising electrocatalyst for the oxygen-evolution reaction. Chem Commun (Camb) 2016; 52:1513-6. [DOI: 10.1039/c5cc09361a] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An amorphous quaternary Ba-Sr-Co-Fe (a-BSCF) oxide film was fabricated by a simple and scalable photochemical thin-film deposition method. a-BSCF demonstrates superior electrocatalytic activity towards the oxygen evolution reaction in 0.1 M KOH solution.
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Affiliation(s)
- Cuijuan Zhang
- Department of Chemistry and Centre for Advanced Solar Materials
- University of Calgary
- 2500 University Dr NW
- Calgary
- Canada T2N 1N4
| | - Curtis P. Berlinguette
- Department of Chemistry and Centre for Advanced Solar Materials
- University of Calgary
- 2500 University Dr NW
- Calgary
- Canada T2N 1N4
| | - Simon Trudel
- Department of Chemistry and Centre for Advanced Solar Materials
- University of Calgary
- 2500 University Dr NW
- Calgary
- Canada T2N 1N4
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11
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Fan J, Chen Z, Shi H, Zhao G. In situ grown, self-supported iron–cobalt–nickel alloy amorphous oxide nanosheets with low overpotential toward water oxidation. Chem Commun (Camb) 2016; 52:4290-3. [DOI: 10.1039/c5cc09699e] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In situ grown and self-supported iron–cobalt–nickel ternary alloy amorphous oxides were prepared by simple anodization which showed superior electrocatalytic activity toward oxygen evolution reaction with an overpotential of only 170 mV and a low Tafel slope.
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Affiliation(s)
- Jiaqi Fan
- Department of Chemistry
- Shanghai Key Lab of Chemical Assessment and Sustainability
- Tongji University
- Shanghai 200092
- China
| | - Zuofeng Chen
- Department of Chemistry
- Shanghai Key Lab of Chemical Assessment and Sustainability
- Tongji University
- Shanghai 200092
- China
| | - Huijie Shi
- Department of Chemistry
- Shanghai Key Lab of Chemical Assessment and Sustainability
- Tongji University
- Shanghai 200092
- China
| | - Guohua Zhao
- Department of Chemistry
- Shanghai Key Lab of Chemical Assessment and Sustainability
- Tongji University
- Shanghai 200092
- China
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12
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Lieberman CM, Filatov AS, Wei Z, Rogachev AY, Abakumov AM, Dikarev EV. Mixed-valent, heteroleptic homometallic diketonates as templates for the design of volatile heterometallic precursors. Chem Sci 2015; 6:2835-2842. [PMID: 29142682 PMCID: PMC5654368 DOI: 10.1039/c4sc04002c] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Accepted: 02/24/2015] [Indexed: 02/04/2023] Open
Abstract
A novel series of mixed-valent, heteroleptic transition metal diketonates that can be utilized as prospective single-source precursors for the low-temperature preparation of oxide materials are reported. The first mixed-valent iron β-diketonates with different FeIII/FeII ratios have been synthesized by applying the mixed-ligand approach. Based on nearly quantitative reaction yields and analysis of iron-oxygen bonds, these compounds were formulated as [FeIII(acac)3][FeII(hfac)2] (1) and [FeII(hfac)2][FeIII(acac)3][FeII(hfac)2] (2). In the above heteroleptic complexes, the Lewis acidic, coordinatively unsaturated FeII centers chelated by two hfac (hexafluoroacetylacetonate) ligands with electron-withdrawing substituents maintain bridging interactions with oxygen atoms of electron-donating acac (acetylacetonate) groups that chelate the neighboring FeIII atoms. Switching the ligands on FeIII and FeII atoms in starting reagents resulted in the instant ligand exchange between iron centers and in yet another polynuclear homometallic diketonate [FeII(hfac)2][FeIII(acac)2(hfac)][FeII(hfac)2] (3) that adheres to the same bonding pattern as in complexes 1 and 2. The proposed synthetic methodology has been extended to design heterometallic diketonates with different M : M' ratios. Homometallic parent molecules have been used as templates to obtain heterometallic mixed-valent [FeIII(acac)3][MnII(hfac)2] (4) and [NiII(hfac)2][FeIII(acac)3][NiII(hfac)2] (5) complexes. The combination of two different diketonate ligands with electron-donating and electron-withdrawing substituents was found to be crucial for maintaining the above mixed-valent heterometallic assemblies. Theoretical investigation of two possible "isomers", [FeIII(acac)3][MnII(hfac)2] (4) and [MnIII(acac)3][FeII(hfac)2] (4') provided an additional support for the metal site assignment giving a preference of 9.78 kcal mol-1 for the molecule 4. Heterometallic complexes obtained in the course of this study have been found to act as effective single-source precursors for the synthesis of mixed-transition metal oxide materials M x M'2-xO3 and M x M'1-xO. The title highly volatile precursors can be used for the low-temperature preparation of both amorphous and crystalline heterometallic oxides in the form of thin films or nanosized particles that are known to operate as efficient catalysts in oxygen evolution reaction.
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Affiliation(s)
- Craig M Lieberman
- Department of Chemistry , University at Albany , Albany , NY 12222 , USA . ; ; Tel: +1-518-442-4401
| | - Alexander S Filatov
- Department of Chemistry , University at Albany , Albany , NY 12222 , USA . ; ; Tel: +1-518-442-4401
| | - Zheng Wei
- Department of Chemistry , University at Albany , Albany , NY 12222 , USA . ; ; Tel: +1-518-442-4401
| | - Andrey Yu Rogachev
- Department of Biological and Chemical Sciences , Illinois Institute of Technology , Chicago , IL 60616 , USA
| | - Artem M Abakumov
- EMAT , University of Antwerp , Groenenborgerlaan 171 , B-2020 Antwerp , Belgium
| | - Evgeny V Dikarev
- Department of Chemistry , University at Albany , Albany , NY 12222 , USA . ; ; Tel: +1-518-442-4401
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13
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Linkov P, Artemyev M, Efimov AE, Nabiev I. Comparative advantages and limitations of the basic metrology methods applied to the characterization of nanomaterials. NANOSCALE 2013; 5:8781-8798. [PMID: 23934544 DOI: 10.1039/c3nr02372a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Fabrication of modern nanomaterials and nanostructures with specific functional properties is both scientifically promising and commercially profitable. The preparation and use of nanomaterials require adequate methods for the control and characterization of their size, shape, chemical composition, crystalline structure, energy levels, pathways and dynamics of physical and chemical processes during their fabrication and further use. In this review, we discuss different instrumental methods for the analysis and metrology of materials and evaluate their advantages and limitations at the nanolevel.
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Affiliation(s)
- Pavel Linkov
- Laboratory of Nano-Bioengineering, National Research Nuclear University, Moscow Engineering Physics Institute, 31 Kashirskoe sh., 115409 Moscow, Russian Federation.
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14
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Zhang C, Trudel S, Berlinguette CP. Water Oxidation Catalysis: Survey of Amorphous Binary Metal Oxide Films Containing Lanthanum and Late 3d Transition Metals. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300765] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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15
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Smith RDL, Prévot MS, Fagan RD, Trudel S, Berlinguette CP. Water Oxidation Catalysis: Electrocatalytic Response to Metal Stoichiometry in Amorphous Metal Oxide Films Containing Iron, Cobalt, and Nickel. J Am Chem Soc 2013; 135:11580-6. [DOI: 10.1021/ja403102j] [Citation(s) in RCA: 738] [Impact Index Per Article: 67.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
| | | | | | | | - Curtis P. Berlinguette
- Departments of Chemistry and
Chemical and Biological Engineering, The University of British Columbia, 2036 Main Mall, Vancouver, BC V6T
1Z1, Canada
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16
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Smith RDL, Prévot MS, Fagan RD, Zhang Z, Sedach PA, Siu MKJ, Trudel S, Berlinguette CP. Photochemical Route for Accessing Amorphous Metal Oxide Materials for Water Oxidation Catalysis. Science 2013; 340:60-3. [DOI: 10.1126/science.1233638] [Citation(s) in RCA: 1183] [Impact Index Per Article: 107.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Large-scale electrolysis of water for hydrogen generation requires better catalysts to lower the kinetic barriers associated with the oxygen evolution reaction (OER). Although most OER catalysts are based on crystalline mixed-metal oxides, high activities can also be achieved with amorphous phases. Methods for producing amorphous materials, however, are not typically amenable to mixed-metal compositions. We demonstrate that a low-temperature process, photochemical metal-organic deposition, can produce amorphous (mixed) metal oxide films for OER catalysis. The films contain a homogeneous distribution of metals with compositions that can be accurately controlled. The catalytic properties of amorphous iron oxide prepared with this technique are superior to those of hematite, whereas the catalytic properties of a-Fe100-y-zCoyNizOx are comparable to those of noble metal oxide catalysts currently used in commercial electrolyzers.
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17
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Duchesne PN, Zhang P. Local structure of fluorescent platinum nanoclusters. NANOSCALE 2012; 4:4199-4205. [PMID: 22573020 DOI: 10.1039/c2nr30500c] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Fluorescent nanoclusters synthesized from a variety of noble metals have recently been reported in the scientific literature. Various characterization methods have been employed in their study, but uncertainty still remains regarding the local structure of such materials. Herein we present the results of employing X-ray absorption spectroscopy to probe the local structure and electronic properties of platinum nanoclusters reduced and stabilized using N,N-dimethylformamide. Most notable amongst these results is an apparent lack of metallic bonding in the samples studied; in light of these findings, it is proposed that a non-metallic platinum nanocluster is instead responsible for the observed fluorescence behaviour.
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Affiliation(s)
- Paul N Duchesne
- Dalhousie University, Department of Chemistry, 6274 Coburg Road, P.O. Box 15000, Halifax, B3H 4R2, Canada
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