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Sa YJ, Kim S, Lee Y, Kim JM, Joo SH. Mesoporous Manganese Oxides with High-Valent Mn Species and Disordered Local Structures for Efficient Oxygen Electrocatalysis. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37339373 DOI: 10.1021/acsami.3c03358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/22/2023]
Abstract
Active and nonprecious-metal bifunctional electrocatalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are vital components of clean energy conversion devices such as regenerative fuel cells and rechargeable metal-air batteries. Porous manganese oxides (MnOx) are promising electrocatalyst candidates because of their high surface area and the abundance of Mn. MnOx catalysts exhibit various oxidation states and crystal structures, which critically affect their electrocatalytic activity. These effects remain elusive mainly because the synthesis of oxidation-state-controlled porous MnOx with similar structural properties is challenging. In this work, four different mesoporous manganese oxides (m-MnOx) were synthesized and used as model catalysts to investigate the effects of local structures and Mn valence states on the activity toward oxygen electrocatalysis. The following activity trends were observed: m-Mn2O3 > m-MnO2 > m-MnO > m-Mn3O4 for the ORR and m-MnO2 > m-Mn2O3 > m-MnO ≈ m-Mn3O4 for the OER. These activity trends suggest that high-valent Mn species (Mn(III) and Mn(IV)) with disordered atomic arrangements induced by nanostructuring significantly influence electrocatalysis. In situ X-ray absorption spectroscopy was used to analyze the changes in the oxidation states under the ORR and OER conditions, which showed the surface phase transformation and generation of active species during electrocatalysis.
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Affiliation(s)
- Young Jin Sa
- Department of Chemistry, Kwangwoon University, Seoul 01897, Republic of Korea
| | - Sohee Kim
- Department of Chemistry, Kwangwoon University, Seoul 01897, Republic of Korea
| | - Yesol Lee
- Department of Chemistry, Kwangwoon University, Seoul 01897, Republic of Korea
| | - Ji Man Kim
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Sang Hoon Joo
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
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2
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Martinez de la Torre C, Freshwater KA, Looney-Sanders MA, Wang Q, Bennewitz MF. Caveat Emptor: Commercialized Manganese Oxide Nanoparticles Exhibit Unintended Properties. ACS OMEGA 2023; 8:18799-18810. [PMID: 37273625 PMCID: PMC10233837 DOI: 10.1021/acsomega.3c00892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 05/04/2023] [Indexed: 06/06/2023]
Abstract
Nano-encapsulated manganese oxide (NEMO) particles are noteworthy contrast agents for magnetic resonance imaging (MRI) due to their bright, pH-switchable signal ("OFF" to "ON" at low pH), high metal loading, and targeting capability for increased specificity. For the first time, we performed a head-to-head comparison of NEMO particles from In-house and commercialized sources (US Nano vs Nanoshel) to assess their potential as bright T1 MRI contrast agents. Manganese oxide nanocrystals (MnO, Mn2O3, and Mn3O4) were systematically evaluated for size, chemistry, release of manganese ions, and MRI signal pre- and post-encapsulation within poly(lactic-co-glycolic acid) (PLGA). Suprisingly, a majority of the commercialized formulations were not as advertised by displaying unintended sizes, morphologies, chemistry, dissolution profiles, and/or MRI signal that precludes in vivo use. US Nano's Mn3O4 and Mn2O3 nanocrystals contained impurities that impacted Mn ion release as well as micron-sized rodlike structures. Nanoshel's MnO and Mn2O3 nanoparticles had very large hydrodynamic sizes (>600 nm). In-house MnO and Nanoshel's Mn3O4 nanoparticles demonstrated the best characteristics with brighter T1 MRI signals, small hydrodynamic sizes, and high encapsulation efficiencies. Our findings highlight that researchers must confirm the properties of purchased nanomaterials before utilizing them in desired applications, as their experimental success may be impacted.
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Affiliation(s)
- Celia Martinez de la Torre
- Department
of Chemical and Biomedical Engineering, Benjamin M. Statler College
of Engineering and Mineral Resources, West
Virginia University, Morgantown, West Virginia 26506, United States
| | - Kasey A. Freshwater
- Department
of Chemical and Biomedical Engineering, Benjamin M. Statler College
of Engineering and Mineral Resources, West
Virginia University, Morgantown, West Virginia 26506, United States
| | - Mara A. Looney-Sanders
- Department
of Chemical and Biomedical Engineering, Benjamin M. Statler College
of Engineering and Mineral Resources, West
Virginia University, Morgantown, West Virginia 26506, United States
| | - Qiang Wang
- Shared
Research Facilities, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Margaret F. Bennewitz
- Department
of Chemical and Biomedical Engineering, Benjamin M. Statler College
of Engineering and Mineral Resources, West
Virginia University, Morgantown, West Virginia 26506, United States
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3
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Zhang H, Bai Y, Lu X, Wang L, Zou Y, Tang Y, Zhu D. Ni-Doped MnO 2 Nanosheet Arrays for Efficient Urea Oxidation. Inorg Chem 2023; 62:5023-5031. [PMID: 36898358 DOI: 10.1021/acs.inorgchem.3c00234] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
Abstract
Urea oxidation reaction (UOR), with a low thermodynamic potential, offers great promise for replacing anodic oxygen evolution reaction of electrolysis systems such as water splitting, carbon dioxide reduction, etc., thus reducing the overall energy consumption. To promote the sluggish kinetics of UOR, highly efficient electrocatalysts are required, and Ni-based materials have been widely investigated. However, most of these reported Ni-based catalysts suffer from large overpotentials, as they generally undergo self-oxidation to form NiOOH species at high potentials, which act as catalytically active sites for UOR. Herein, Ni-doped MnO2 (Ni-MnO2) nanosheet arrays were successfully prepared on nickel foam. The as-fabricated Ni-MnO2 shows distinct UOR behavior with most of the previously reported Ni-based catalysts, as urea oxidation on Ni-MnO2 proceeds before the formation of NiOOH. Notably, a low potential of 1.388 V vs reversible hydrogen electrode was required to achieve a high current density of 100 mA cm-2 on Ni-MnO2. It is suggested that both Ni doping and nanosheet array configuration are responsible for the high UOR activities on Ni-MnO2. The introduction of Ni modifies the electronic structure of Mn atoms, and more Mn3+ species are generated in Ni-MnO2, contributing to its outstanding UOR performance.
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Affiliation(s)
- Huaiyu Zhang
- School of Chemistry and Materials Science, Institute of Advanced Materials and Flexible Electronics (IAMFE), Nanjing University of Information Science and Technology, Nanjing, Jiangsu 210044, China
| | - Yu Bai
- School of Chemistry and Materials Science, Institute of Advanced Materials and Flexible Electronics (IAMFE), Nanjing University of Information Science and Technology, Nanjing, Jiangsu 210044, China
| | - Xue Lu
- College of Science, Nanjing Forestry University, Nanjing, Jiangsu 210037, China
| | - Liang Wang
- Centre for Catalysis and Clean Energy, Griffith University, Gold Coast Campus, Gold Coast, Queensland 4222, Australia
| | - Yan Zou
- School of Chemistry and Materials Science, Institute of Advanced Materials and Flexible Electronics (IAMFE), Nanjing University of Information Science and Technology, Nanjing, Jiangsu 210044, China
| | - Yujia Tang
- School of Chemistry and Materials Science, Institute of Advanced Materials and Flexible Electronics (IAMFE), Nanjing University of Information Science and Technology, Nanjing, Jiangsu 210044, China
| | - Dongdong Zhu
- School of Chemistry and Materials Science, Institute of Advanced Materials and Flexible Electronics (IAMFE), Nanjing University of Information Science and Technology, Nanjing, Jiangsu 210044, China
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4
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Rasaily S, Baruah K, Sharma D, Lepcha P, Biswas S, Biswas AN, Tamang S, Pariyar A. Rationally Designed Manganese-Based Metal-Organic Frameworks as Altruistic Metal Oxide Precursors for Noble Metal-Free Oxygen Reduction Reaction. Inorg Chem 2023; 62:3026-3035. [PMID: 36755399 DOI: 10.1021/acs.inorgchem.2c03707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
The sluggish oxygen reduction reaction (ORR) at the cathode is challenging and hinders the growth of hydrogen fuel cells. Concerning kinetic values, platinum is the best known catalyst for ORR; however, its less abundance, high cost, and corrosive nature warrant the development of low-cost catalysts. We report the hydrothermal synthesis of two novel Mn-based metal-organic frameworks (MOFs), [Mn2(DOT)(H2O)2]n (Mn-SKU-1) and [Mn2(DOT)2(BPY)2(THF)]n (Mn-SKU-2) (DOT = 2,5-dihydroxyterephthalate; BPY = 4,4'-bipyridine). Mn-SKU-1 contains dimeric Mn(II) centers where the two corner-shared MnO6 octahedra fuse to give rise to an infinite Mn2O10 cluster, whereas the two Mn(II) ions coordinate to DOT and BPY moieties to give rise to a pillared structure in Mn-SKU-2 and form a 3D → 3D homo-interpenetration MOF with a twofold interpenetrated net. The pyrolysis of as-synthesized Mn-MOFs at 600 °C under N2 produced exclusively porous α-Mn2O3 composites (PSKU-1 and PSKU-2), with the BET surface area of 90.8 (for PSKU-1) and 179.3 m2 g-1 (for PSKU-2). These mesoporous MOF-derived α-Mn2O3 composites were modified as cathode materials for the electrocatalytic reduction of oxygen. The onset potential for the oxygen reduction reaction was found to be 0.90 V for PSKU-1 and 0.93 V for PSKU-2 versus RHE in 0.1 M KOH solution, with the current density of 4.8 and 6.0 mA cm-2, respectively, at 1600 rpm. Based on the RDE/RRDE results, the electrocatalytic oxygen reduction occurs majorly via the four-electron process. The electrocatalyst PSKU-2 is cheap, easy to use, retains 90% of its activity after 10 h of continuous use, and offers higher recyclability than Pt/C. The onset potential maximum current density and kinetic values (Jk = 11.68 mA cm-2 and Tafel slope = 85.0 mV dec-1) obtained in this work are higher than the values reported for pure Mn2O3.
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Affiliation(s)
- Sagarmani Rasaily
- Department of Chemistry, School of Physical Sciences, Sikkim University, Gangtok, East Sikkim 737102, India
| | - Khanindram Baruah
- Department of Chemistry, School of Physical Sciences, Sikkim University, Gangtok, East Sikkim 737102, India
| | - Debesh Sharma
- Department of Chemistry, School of Physical Sciences, Sikkim University, Gangtok, East Sikkim 737102, India
| | - Panjo Lepcha
- Department of Chemistry, National Institute of Technology, Ravangla, South Sikkim 737139, India
| | - Sachidulal Biswas
- Department of Chemistry, National Institute of Technology, Ravangla, South Sikkim 737139, India
| | | | - Sudarsan Tamang
- Department of Chemistry, School of Physical Sciences, Sikkim University, Gangtok, East Sikkim 737102, India
| | - Anand Pariyar
- Department of Chemistry, School of Physical Sciences, Sikkim University, Gangtok, East Sikkim 737102, India
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5
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Chu T, Cheng M, Hou S, Yang Y. Modified graphite paper treated by anionic intercalation for manganese removal via electrochemical deposition in water treatment. J IND ENG CHEM 2023. [DOI: 10.1016/j.jiec.2023.01.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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6
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Olowoyo JO, Kriek RJ. Recent Progress on Bimetallic-Based Spinels as Electrocatalysts for the Oxygen Evolution Reaction. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2203125. [PMID: 35996806 DOI: 10.1002/smll.202203125] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 07/22/2022] [Indexed: 06/15/2023]
Abstract
Electrocatalytic water splitting is a promising and viable technology to produce clean, sustainable, and storable hydrogen as an energy carrier. However, to meet the ever-increasing global energy demand, it is imperative to develop high-performance non-precious metal-based electrocatalysts for the oxygen evolution reaction (OER), as the OER is considered the bottleneck for electrocatalytic water splitting. Spinels, in particular, are considered promising OER electrocatalysts due to their unique properties, precise structures, and compositions. Herein, the recent progress on the application of bimetallic-based spinels (AFe2 O4 , ACo2 O4 , and AMn2 O4 ; where A = Ni, Co, Cu, Mn, and Zn) as electrocatalysts for the OER is presented. The fundamental concepts of the OER are highlighted after which the family of spinels, their general formula, and classifications are introduced. This is followed by an overview of the various classifications of bimetallic-based spinels and their recent developments and applications as OER electrocatalysts, with special emphasis on enhancing strategies that have been formulated to improve the OER performance of these spinels. In conclusion, this review summarizes all studies mentioned therein and provides the challenges and future perspectives for bimetallic-based spinel OER electrocatalysts.
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Affiliation(s)
- Joshua O Olowoyo
- Electrochemistry for Energy & Environment Group, Research Focus Area: Chemical Resource Beneficiation (CRB), Private Bag X6001, North-West University, Potchefstroom, 2520, South Africa
| | - Roelof J Kriek
- Electrochemistry for Energy & Environment Group, Research Focus Area: Chemical Resource Beneficiation (CRB), Private Bag X6001, North-West University, Potchefstroom, 2520, South Africa
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7
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Xu R, Xiong J, Liu D, Wang Y, Ming YA. Inverse micelle fabrication of ordered mesoporous manganese oxide and degradation of tetracycline hydrochloride. J Colloid Interface Sci 2022; 625:397-404. [PMID: 35724462 DOI: 10.1016/j.jcis.2022.06.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 05/26/2022] [Accepted: 06/04/2022] [Indexed: 11/28/2022]
Abstract
Ordered mesoporous manganese oxides (MnOx) were synthesized using the modified inverse micelle method. The crystal structure and surface morphology were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The element content and changes in surface valence of catalysts were analyzed by X-ray photoelectron spectroscopy (XPS). The MnOx were used to activate peroxymonosulfate (PMS) to degrade tetracycline hydrochloride (TCH). The catalytic activity of MnOx was enhanced at a calcination temperature of 350 °C (MM-3). The degradation efficiency of TCH in MM-3/PMS system was 87.89% in 180 min. Appropriate dosages of catalyst and PMS improve the degradation efficiency of TCH. This system showed a wide range of pH application (3-9). In the presence of coexisting ions and humic acid, the degradation efficiency of TCH was still above 80%. The results of free radical capture experiment and electron paramagnetic resonance (EPR) test proved that the system activates PMS to produce three types of free radicals: SO4-, OH and 1O2. Therefore, MM-3 is a promising catalyst for the degradation of TCH in practical wastewater treatment.
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Affiliation(s)
- Rui Xu
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, Hubei, China
| | - Junjie Xiong
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, Hubei, China
| | - Dan Liu
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, Hubei, China
| | - Yingru Wang
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, Hubei, China
| | - Yin-An Ming
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, Hubei, China.
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8
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Salmanion M, Kondov I, Vandichel M, Aleshkevych P, Najafpour MM. Surprisingly Low Reactivity of Layered Manganese Oxide toward Water Oxidation in Fe/Ni-Free Electrolyte under Alkaline Conditions. Inorg Chem 2022; 61:2292-2306. [PMID: 35029976 DOI: 10.1021/acs.inorgchem.1c03665] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
So far, many studies on the oxygen-evolution reaction (OER) by Mn oxides have been focused on activity; however, the identification of the best performing active site and corresponding catalytic cycles is also of critical importance. Herein, the real intrinsic activity of layered Mn oxide toward OER in Fe/Ni-free KOH is studied for the first time. At pH ≈ 14, the onset of OER for layered Mn oxide in the presence of Fe/Ni-free KOH happens at 1.72 V (vs reversible hydrogen electrode (RHE)). In the presence of Fe ions, a 190 mV decrease in the overpotential of OER was recorded for layered Mn oxide as well as a significant decrease (from 172.8 to 49 mV/decade) in the Tafel slope. Furthermore, we find that both Ni and Fe ions increase OER remarkably in the presence of layered Mn oxide, but that pure layered Mn oxide is not an efficient catalyst for OER without Ni and Fe under alkaline conditions. Thus, pure layered Mn oxide and electrolytes are critical factors in finding the real intrinsic activity of layered Mn oxide for OER. Our results call into question the high efficiency of layered Mn oxides toward OER under alkaline conditions and also elucidate the significant role of Ni and Fe impurities in the electrolyte in the presence of layered Mn oxide toward OER under alkaline conditions. Overall, a computational model supports the conclusions from the experimental structural and electrochemical characterizations. In particular, substitutional doping with Fe decreases the thermodynamic OER overpotential up to 310 mV. Besides, the thermodynamic OER onset potential calculated for the Fe-free structures is higher than 1.7 V (vs RHE) and, thus, not in the stability range of Mn oxides.
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Affiliation(s)
- Mahya Salmanion
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran
| | - Ivan Kondov
- Steinbuch Centre for Computing, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Matthias Vandichel
- Department of Chemical Sciences and Bernal Institute, University of Limerick, Limerick V94 T9PX, Ireland
| | - Pavlo Aleshkevych
- Institute of Physics, Polish Academy of Sciences, Warsaw 02-668, Poland
| | - Mohammad Mahdi Najafpour
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran.,Center of Climate Change and Global Warming, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran.,Research Center for Basic Sciences and Modern Technologies (RBST), Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran
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9
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Zheng X, Mohammadi N, Moreno Zuria A, Mohamedi M. Advanced Zinc-Air Batteries with Free-Standing Hierarchical Nanostructures of the Air Cathode for Portable Applications. ACS APPLIED MATERIALS & INTERFACES 2021; 13:61374-61385. [PMID: 34927435 DOI: 10.1021/acsami.1c22371] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
It is today advanced that the development of a free-standing (binderless) air cathode via direct growth of nonprecious metal electrocatalysts onto the surface of the conductive collector would be a cutting-edge strategy to reduce the interfacial resistance, improve the mechanical stability, and reduce the final weight and the cost of manufacturing. Here, for Zn-air batteries (ZABs), we propose an innovative binderless noble-metal-free hierarchical nanostructured bifunctional air cathode in which high-density MnOx nanorods (NRs) are directly grown on carbon nanotubes (CNTs) themselves synthesized on a microfibrous carbon paper (CP) substrate. All carbon/MnOx air cathodes achieved specific capacities very close to the theoretical value of 820 mAh gZn-1. A very stable voltage gap between the charge and discharge processes along hundred cycles was obtained, demonstrating the stability and good bifunctional electrocatalytic activities of these cathodes toward the oxygen reduction reaction/oxygen evolution reaction in a real ZAB device. As a proof-of-concept for handheld electronic applications, a ZAB assembled with CP/MnOx NRs as the air electrode and a Zn plate anode operated a timer for 14 days successfully, whereas two ZAB-based CNTs/MnOx cathodes connected in series powered a 2 V light-emitting diode (LED) bulb and a 3 V multimeter. The proposed strategy and results may pave the way for the rational design of hierarchical free-standing bifunctional electrocatalysts for ZABs, other metal-air batteries, and fuel cells.
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Affiliation(s)
- Xiaoying Zheng
- Institut National de la Recherche Scientifique (INRS), Énergie Matériaux Télécommunications (EMT), 1650, Boulevard Lionel-Boulet, Varennes, Québec J3X 1P7, Canada
| | - Naser Mohammadi
- Institut National de la Recherche Scientifique (INRS), Énergie Matériaux Télécommunications (EMT), 1650, Boulevard Lionel-Boulet, Varennes, Québec J3X 1P7, Canada
| | - Alonso Moreno Zuria
- Institut National de la Recherche Scientifique (INRS), Énergie Matériaux Télécommunications (EMT), 1650, Boulevard Lionel-Boulet, Varennes, Québec J3X 1P7, Canada
| | - Mohamed Mohamedi
- Institut National de la Recherche Scientifique (INRS), Énergie Matériaux Télécommunications (EMT), 1650, Boulevard Lionel-Boulet, Varennes, Québec J3X 1P7, Canada
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10
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Kiani D, Sourav S, Wachs IE, Baltrusaitis J. A combined computational and experimental study of methane activation during oxidative coupling of methane (OCM) by surface metal oxide catalysts. Chem Sci 2021; 12:14143-14158. [PMID: 34760199 PMCID: PMC8565385 DOI: 10.1039/d1sc02174e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Accepted: 10/04/2021] [Indexed: 11/21/2022] Open
Abstract
The experimentally validated computational models developed herein, for the first time, show that Mn-promotion does not enhance the activity of the surface Na2WO4 catalytic active sites for CH4 heterolytic dissociation during OCM. Contrary to previous understanding, it is demonstrated that Mn-promotion poisons the surface WO4 catalytic active sites resulting in surface WO5 sites with retarded kinetics for C-H scission. On the other hand, dimeric Mn2O5 surface sites, identified and studied via ab initio molecular dynamics and thermodynamics, were found to be more efficient in activating CH4 than the poisoned surface WO5 sites or the original WO4 sites. However, the surface reaction intermediates formed from CH4 activation over the Mn2O5 surface sites are more stable than those formed over the Na2WO4 surface sites. The higher stability of the surface intermediates makes their desorption unfavorable, increasing the likelihood of over-oxidation to CO x , in agreement with the experimental findings in the literature on Mn-promoted catalysts. Consequently, the Mn-promoter does not appear to have an essential positive role in synergistically tuning the structure of the Na2WO4 surface sites towards CH4 activation but can yield MnO x surface sites that activate CH4 faster than Na2WO4 surface sites, but unselectively.
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Affiliation(s)
- Daniyal Kiani
- Department of Chemical and Biomolecular Engineering, Lehigh University B336 Iacocca Hall, 111 Research Drive Bethlehem PA 18015 USA
| | - Sagar Sourav
- Department of Chemical and Biomolecular Engineering, Lehigh University B336 Iacocca Hall, 111 Research Drive Bethlehem PA 18015 USA
| | - Israel E Wachs
- Department of Chemical and Biomolecular Engineering, Lehigh University B336 Iacocca Hall, 111 Research Drive Bethlehem PA 18015 USA
| | - Jonas Baltrusaitis
- Department of Chemical and Biomolecular Engineering, Lehigh University B336 Iacocca Hall, 111 Research Drive Bethlehem PA 18015 USA
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11
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Septian A, Shin WS. Oxidative removal of sulfadiazine using synthetic and natural manganese dioxides. ENVIRONMENTAL TECHNOLOGY 2021; 42:2254-2266. [PMID: 31791202 DOI: 10.1080/09593330.2019.1699963] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Accepted: 11/25/2019] [Indexed: 06/10/2023]
Abstract
Studies on oxidation kinetics of sulfadiazine (SDZ) using δ-MnO2 (birnessite) and natural MnO2 are limited. Reaction order at different SDZ speciation was determined based on the effects of initial H+, MnO2 and SDZ concentrations using initial rate method, which would be useful to determine the optimum pH and MnO2 concentration. Birnessite and natural MnO2 with different physico-chemical properties such as BET surface area, pHPZC, d-spacing, and crystal size similarly showed good efficiencies in oxidizing neutral SDZ (pH 5) and anionic SDZ (pH 8). Activation energy (Ea) and thermodynamic parameters indicated the similar oxidation efficiencies in the temperature range of 10-40°C. The SO42- was produced from the SDZ oxidation coupled to the reduction of MnO2 to Mn2+. The effect of co-solute ciprofloxacin (CIP) on the oxidation kinetics of SDZ was also studied. The rates of SDZ oxidation by both birnessite and natural MnO2 were reduced by the presence of CIP due to competition in oxidation between SDZ and CIP. The SDZ was more rapidly oxidized than CIP in both single- and bi-solute systems, as indicated by the presence of CIP intermediate, whereas the intermediate of SDZ was not detected.
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Affiliation(s)
- Ardie Septian
- School of Architecture, Civil, Environmental and Energy Engineering, Kyungpook National University, Daegu, Korea
| | - Won Sik Shin
- School of Architecture, Civil, Environmental and Energy Engineering, Kyungpook National University, Daegu, Korea
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12
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Celik E, Ma Y, Brezesinski T, Elm MT. Ordered mesoporous metal oxides for electrochemical applications: correlation between structure, electrical properties and device performance. Phys Chem Chem Phys 2021; 23:10706-10735. [PMID: 33978649 DOI: 10.1039/d1cp00834j] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Ordered mesoporous metal oxides with a high specific surface area, tailored porosity and engineered interfaces are promising materials for electrochemical applications. In particular, the method of evaporation-induced self-assembly allows the formation of nanocrystalline films of controlled thickness on polar substrates. In general, mesoporous materials have the advantage of benefiting from a unique combination of structural, chemical and physical properties. This Perspective article addresses the structural characteristics and the electrical (charge-transport) properties of mesoporous metal oxides and how these affect their application in energy storage, catalysis and gas sensing.
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Affiliation(s)
- Erdogan Celik
- Center for Materials Research, Justus Liebig University Giessen, 35392 Giessen, Germany.
| | - Yanjiao Ma
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.
| | - Torsten Brezesinski
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.
| | - Matthias T Elm
- Center for Materials Research, Justus Liebig University Giessen, 35392 Giessen, Germany. and Institute of Experimental Physics I, Justus Liebig University Giessen, 35392 Giessen, Germany and Institute of Physical Chemistry, Justus Liebig University Giessen, 35392 Giessen, Germany
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13
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Heidari S, Balaghi SE, Sologubenko AS, Patzke GR. Economic Manganese-Oxide-Based Anodes for Efficient Water Oxidation: Rapid Synthesis and In Situ Transmission Electron Microscopy Monitoring. ACS Catal 2021. [DOI: 10.1021/acscatal.0c03388] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Sima Heidari
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - S. Esmael Balaghi
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Alla S. Sologubenko
- Scientific Center for Optical and Electron Microscopy (ScopeM), ETH Zurich, Otto-Stern-Weg 3, CH-8093 Zurich, Switzerland
| | - Greta R. Patzke
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
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14
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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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15
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Selvakumar K, Duraisamy V, Senthil Kumar SM. Activity manifestation via architectural manipulation by cubic silica-derived Co 3O 4 electrocatalysts towards bifunctional oxygen electrode performance. NEW J CHEM 2021. [DOI: 10.1039/d1nj02061g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A KIT-6-derived Co3O4 material demonstrates superior bifunctional activity due to its higher densities of Co3+ and Co2+ sites.
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Affiliation(s)
- Karuppiah Selvakumar
- Electroorganic and Materials Electrochemistry (EME) Division, CSIR-Central Electrochemical Research Institute (CECRI), Karaikudi-630 003, Tamil Nadu, India
| | - Velu Duraisamy
- Electroorganic and Materials Electrochemistry (EME) Division, CSIR-Central Electrochemical Research Institute (CECRI), Karaikudi-630 003, Tamil Nadu, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201 002, India
| | - Sakkarapalayam Murugesan Senthil Kumar
- Electroorganic and Materials Electrochemistry (EME) Division, CSIR-Central Electrochemical Research Institute (CECRI), Karaikudi-630 003, Tamil Nadu, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201 002, India
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16
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Zhao SS, Zhang BM, Zhang H, Jiang W, Zhao Z. A Stable Polyoxometalate-Based Metal–Organic Framework with Active CoMoO4 Layers for Electroreduction and Visible-Light-Driven Water Oxidation. Inorg Chem 2020; 59:17775-17782. [DOI: 10.1021/acs.inorgchem.0c03015] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Si-Si Zhao
- Institute of Catalysis for Energy and Environment, College of Chemistry & Chemical Engineering, Shenyang Normal University, Shenyang, Liaoning 110034, People’s Republic of China
| | - Bai-Ming Zhang
- Institute of Catalysis for Energy and Environment, College of Chemistry & Chemical Engineering, Shenyang Normal University, Shenyang, Liaoning 110034, People’s Republic of China
| | - Hang Zhang
- Institute of Catalysis for Energy and Environment, College of Chemistry & Chemical Engineering, Shenyang Normal University, Shenyang, Liaoning 110034, People’s Republic of China
| | - Wei Jiang
- College of Environmental Science and Engineering, Jilin Normal University, Siping, Jilin 136000, People’s Republic of China
| | - Zhen Zhao
- Institute of Catalysis for Energy and Environment, College of Chemistry & Chemical Engineering, Shenyang Normal University, Shenyang, Liaoning 110034, People’s Republic of China
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17
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Lee S, Lee GY, Kim CG, Chung TM, Park BK. Heteroleptic manganese compounds as potential precursors for manganese based thin films and nanomaterials. RSC Adv 2020; 10:29659-29667. [PMID: 35518259 PMCID: PMC9056172 DOI: 10.1039/d0ra05225f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Accepted: 08/03/2020] [Indexed: 12/15/2022] Open
Abstract
Heteroleptic manganese compounds, [Mn(tmhd)(TMEDA)Cl]2 (1), [Mn(tmhd)(dmamp)]2 (2), Mn2(tmhd)2(edpa)2(μ-THF) (3), [Mn(dmampea)(NEt2)]2 (4), and Mn(dmampea)(iPr-MeAMD) (5), were synthesized and characterized. Compound 5 was a volatile liquid. Structural analysis revealed that 1-4 were dimers. Compounds 1 and 3, 2, and 4 had distorted octahedral, distorted trigonal-bipyramidal, and distorted tetrahedral geometries around the Mn centers, respectively. Based on thermogravimetric analysis, the residues of 2 and 3 were expected to be MnO and Mn3O4, respectively. According to thermogravimetric analysis, 4 showed a higher residual value, whereas 5 exhibited a lower value than those expected for manganese nitrides.
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Affiliation(s)
- Sunju Lee
- Thin Film Materials Research Center, Korea Research Institute of Chemical Technology (KRICT) 141 Gajeong-Ro, Yuseong-Gu Daejeon 34114 Republic of Korea
| | - Ga Yeon Lee
- Thin Film Materials Research Center, Korea Research Institute of Chemical Technology (KRICT) 141 Gajeong-Ro, Yuseong-Gu Daejeon 34114 Republic of Korea
| | - Chang Gyoun Kim
- Thin Film Materials Research Center, Korea Research Institute of Chemical Technology (KRICT) 141 Gajeong-Ro, Yuseong-Gu Daejeon 34114 Republic of Korea
- Department of Chemical Convergence Materials, University of Science and Technology (UST) 217, Gajeong-Ro, Yuseong-Gu Deajeon 34113 Republic of Korea
| | - Taek-Mo Chung
- Thin Film Materials Research Center, Korea Research Institute of Chemical Technology (KRICT) 141 Gajeong-Ro, Yuseong-Gu Daejeon 34114 Republic of Korea
- Department of Chemical Convergence Materials, University of Science and Technology (UST) 217, Gajeong-Ro, Yuseong-Gu Deajeon 34113 Republic of Korea
| | - Bo Keun Park
- Thin Film Materials Research Center, Korea Research Institute of Chemical Technology (KRICT) 141 Gajeong-Ro, Yuseong-Gu Daejeon 34114 Republic of Korea
- Department of Chemical Convergence Materials, University of Science and Technology (UST) 217, Gajeong-Ro, Yuseong-Gu Deajeon 34113 Republic of Korea
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18
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Mian MR, Afrin U, Fataftah MS, Idrees KB, Islamoglu T, Freedman DE, Farha OK. Control of the Porosity in Manganese Trimer-Based Metal-Organic Frameworks by Linker Functionalization. Inorg Chem 2020; 59:8444-8450. [PMID: 32463656 DOI: 10.1021/acs.inorgchem.0c00885] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Manganese complexes have attracted significant interest in chemical industries and academic research for their application as catalysts owing to their ability to attain a variety of oxidation states. Generally, sterically bulky ligands are required to isolate molecular homogeneous catalysts in order to prevent decomposition. Herein, we capitalize on the catalytic properties of Mn and circumvent the instability of these complexes through incorporation of Mn-atoms into porous crystalline frameworks, such as metal-organic frameworks (MOFs). MOFs are able to enhance the stability of these catalysts while also providing accessibility to the Mn sites for enhanced reactivity. We solvothermally synthesized two trinuclear Mn-based MOFs, namely [Mn3O(BDC)3(H2O)3]n (Mn-MIL-88, where H2BDC = benzene-1,4-dicarboxylic acid) and [Mn3O(BDC-Me4)3(H2O)3]n (Mn-MIL-88-Me4, where H2BDC-Me4 = 2,3,5,6-tetramethylterephthalic acid). Through comprehensive single-crystal X-ray diffraction, spectroscopic, and magnetic studies, we revealed that both MOFs are in a Mn(II/III) mixed-valence state instead of the commonly observed Mn(III) oxidation state. Furthermore, the use of a methylated linker (BDC-Me4) allowed access to permanent porosity in Mn-MIL-88-Me4, which is an analogue of the flexible MIL-88 family, yielding a catalyst for alcohol oxidation.
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Affiliation(s)
- Mohammad Rasel Mian
- Department of Chemistry and International Institute of Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Unjila Afrin
- Department of Chemistry and International Institute of Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Majed S Fataftah
- Department of Chemistry and International Institute of Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Karam B Idrees
- Department of Chemistry and International Institute of Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Timur Islamoglu
- Department of Chemistry and International Institute of Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Danna E Freedman
- Department of Chemistry and International Institute of Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Omar K Farha
- Department of Chemistry and International Institute of Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States.,Department of Chemical & Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
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19
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Farzana R, Sayeed MA, Joseph J, Ostrikov K(K, O'Mullane AP, Sahajwalla V. Manganese Oxide Derived from a Spent Zn–C Battery as a Catalyst for the Oxygen Evolution Reaction. ChemElectroChem 2020. [DOI: 10.1002/celc.202000422] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Rifat Farzana
- Centre for Sustainable Materials Research and Technology School of Materials Science and Engineering UNSW Sydney NSW 2052 Australia
| | - Md Abu Sayeed
- School of Chemistry and Physics Queensland University of Technology (QUT) Brisbane QLD 4001 Australia
| | - Jickson Joseph
- School of Chemistry and Physics Queensland University of Technology (QUT) Brisbane QLD 4001 Australia
| | - Kostya (Ken) Ostrikov
- School of Chemistry and Physics Queensland University of Technology (QUT) Brisbane QLD 4001 Australia
| | - Anthony P. O'Mullane
- School of Chemistry and Physics Queensland University of Technology (QUT) Brisbane QLD 4001 Australia
| | - Veena Sahajwalla
- Centre for Sustainable Materials Research and Technology School of Materials Science and Engineering UNSW Sydney NSW 2052 Australia
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20
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Rajendiran R, Muthuchamy N, Park KH, Li OL, Kim HJ, Prabakar K. Self-assembled 3D hierarchical MnCO3/NiFe layered double hydroxides as a superior electrocatalysts for the oxygen evolution reactions. J Colloid Interface Sci 2020; 566:224-233. [DOI: 10.1016/j.jcis.2020.01.086] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 01/20/2020] [Accepted: 01/22/2020] [Indexed: 12/23/2022]
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21
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Smith PF, Wang L, Bock DC, Brady AB, Lutz DM, Yang S, Hu X, Wu L, Zhu Y, Marschilok AC, Takeuchi ES, Takeuchi KJ. Vanadium-Substituted Tunnel Structured Silver Hollandite (Ag 1.2V xMn 8-xO 16): Impact on Morphology and Electrochemistry. Inorg Chem 2020; 59:3783-3793. [PMID: 32129071 DOI: 10.1021/acs.inorgchem.9b03443] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of tunnel structured V-substituted silver hollandite (Ag1.2VxMn8-xO16, x = 0-1.4) samples is prepared and characterized through a combination of synchrotron X-ray diffraction (XRD), synchrotron X-ray absorption spectroscopy (XAS), laboratory Raman spectroscopy, and electron microscopy measurements. The oxidation states of the individual transition metals are characterized using V and Mn K-edge XAS data indicating the vanadium centers exist as V5+, and the Mn oxidation state decreases with increased V substitution to balance the charge. Scanning transmission electron microscopy of reduced materials shows reduction-displacement of silver metal at high levels of lithiation. In lithium batteries, the V-substituted tunneled manganese oxide materials reveal previously unseen reversible nonaqueous Ag electrochemistry and exhibit up to 2.5× higher Li storage capacity relative to their unsubstituted counterparts. The highest capacity was observed for the Ag1.2(V0.8Mn7.2)O16·0.8H2O material with an intermediate level of V substitution, likely due to a combination of the atomic composition, the morphology of the particle, and the homogeneous distribution of the active material within the electrode structure where factors over multiple length scales contribute to the electrochemistry.
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Affiliation(s)
- Paul F Smith
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States.,Department of Chemistry, Valparaiso University, Valparaiso, Indiana 46383, United States
| | - Lei Wang
- Energy and Photon Sciences Directorate, Brookhaven National Laboratory, Upton New York 11973, United States
| | - David C Bock
- Energy and Photon Sciences Directorate, Brookhaven National Laboratory, Upton New York 11973, United States
| | - Alexander B Brady
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - Diana M Lutz
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States
| | - Shize Yang
- Energy and Photon Sciences Directorate, Brookhaven National Laboratory, Upton New York 11973, United States
| | - Xiaobing Hu
- Energy and Photon Sciences Directorate, Brookhaven National Laboratory, Upton New York 11973, United States
| | - Lijun Wu
- Energy and Photon Sciences Directorate, Brookhaven National Laboratory, Upton New York 11973, United States
| | - Yimei Zhu
- Energy and Photon Sciences Directorate, Brookhaven National Laboratory, Upton New York 11973, United States
| | - Amy C Marschilok
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States.,Energy and Photon Sciences Directorate, Brookhaven National Laboratory, Upton New York 11973, United States.,Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - Esther S Takeuchi
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States.,Energy and Photon Sciences Directorate, Brookhaven National Laboratory, Upton New York 11973, United States.,Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - Kenneth J Takeuchi
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States.,Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
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22
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Zahra T, Ahmad KS, Thomas AG, Zequine C, Malik MA, Gupta RK. Organic template-based ZnO embedded Mn 3O 4 nanoparticles: synthesis and evaluation of their electrochemical properties towards clean energy generation. RSC Adv 2020; 10:9854-9867. [PMID: 35498591 PMCID: PMC9050345 DOI: 10.1039/c9ra10472k] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 01/31/2020] [Indexed: 12/15/2022] Open
Abstract
To deal with fossil fuel depletion and the rise in global temperatures caused by fossil fuels, cheap and abundant materials are required, in order to fulfill energy demand by developing high-performance fuel cells and electrocatalysts. In this work, a natural organic agent has been used to synthesize nano-structured ZnO/Mn3O4 with high surface area and enhanced electrocatalytic performance. Upon pre-annealing treatment, mixed metal oxide precipitates are formed due to the complex formation between a metal oxide and organic extract. The thermally annealed mixed oxide ZnO/Mn3O4 was characterized by XRD diffractometer, Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDX). Gas chromatography-mass spectrometry (GC-MS) identified methyldecylamine as a major stabilizing agent of the synthesized nanomaterial. Using a Tauc plot, the calculated band energy for the synthesized ZnO/Mn3O4 mixed metal oxide was 1.65 eV. Moreover, we have demonstrated the effects of incorporated organic compounds on the surface chemistry, morphology and electrochemical behavior of ZnO/Mn3O4. The phyto-functionalized ZnO/Mn3O4 was deposited on Ni-foam for electrocatalytic studies. The fabricated electrode revealed good performance with low over-potential and Tafel slope, suggesting it to be suitable as a potential catalyst for water splitting application, in particular for the oxygen evolution reaction (OER). The overall findings of the current study provide a cost-effective and efficient organic template for functionalization and sustainable fabrication of ZnO/Mn3O4 nanomaterial for application as an electrocatalyst. To deal with fossil fuel depletion and the rise in global temperatures caused by fossil fuels, cheap and abundant materials are required, in order to fulfill energy demand by developing high-performance fuel cells and electrocatalysts.![]()
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Affiliation(s)
- Taghazal Zahra
- Department of Environmental Sciences, Fatima Jinnah Women University Rawalpindi Pakistan
| | - Khuram Shahzad Ahmad
- Department of Environmental Sciences, Fatima Jinnah Women University Rawalpindi Pakistan
| | - Andrew Guy Thomas
- Department of Materials, Photon Science Institute, Sir Henry Royce Institute, Alan Turing Building, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Camila Zequine
- Department of Chemistry, Pittsburg State University 1701 South Broadway Street Pittsburg KS 66762 USA
| | - Mohammad Azad Malik
- Department of Materials, Photon Science Institute, Sir Henry Royce Institute, Alan Turing Building, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Ram K Gupta
- Department of Chemistry, Pittsburg State University 1701 South Broadway Street Pittsburg KS 66762 USA
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23
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Liao H, Guo X, Hou Y, Liang H, Zhou Z, Yang H. Construction of Defect-Rich Ni-Fe-Doped K 0.23 MnO 2 Cubic Nanoflowers via Etching Prussian Blue Analogue for Efficient Overall Water Splitting. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e1905223. [PMID: 32049431 DOI: 10.1002/smll.201905223] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 12/17/2019] [Indexed: 05/16/2023]
Abstract
Designing elaborate nanostructures and engineering defects have been promising approaches to fabricate cost-efficient electrocatalysts toward overall water splitting. In this work, a controllable Prussian-blue-analogue-sacrificed strategy followed by an annealing process to harvest defect-rich Ni-Fe-doped K0.23 MnO2 cubic nanoflowers (Ni-Fe-K0.23 MnO2 CNFs-300) as highly active bifunctional catalysts for oxygen and hydrogen evolution reactions (OER and HER) is reported. Benefiting from many merits, including unique morphology, abundant defects, and doping effect, Ni-Fe-K0.23 MnO2 CNFs-300 shows the best electrocatalytic performances among currently reported Mn oxide-based electrocatalysts. This catalyst affords low overpotentials of 270 (320) mV at 10 (100) mA cm-2 for OER with a small Tafel slope of 42.3 mV dec-1 , while requiring overpotentials of 116 and 243 mV to attain 10 and 100 mA cm-2 for HER respectively. Moreover, Ni-Fe-K0.23 MnO2 CNFs-300 applied to overall water splitting exhibits a low cell voltage of 1.62 V at 10 mA cm-2 and excellent durability, even superior to the Pt/C||IrO2 cell at large current density. Density functional theory calculations further confirm that doping Ni and Fe into the crystal lattice of δ-MnO2 can not only reinforce the conductivity but also reduces the adsorption free-energy barriers on the active sites during OER and HER.
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Affiliation(s)
- Huanyun Liao
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Xingzhong Guo
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Yang Hou
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Hao Liang
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Zheng Zhou
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Hui Yang
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
- Zhejiang-California International Nanosystems Institute, Zhejiang University, Hangzhou, 310058, P. R. China
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24
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Wen Z, Lu J, Zhang Y, Cheng G, Huang S, Chen J, Xu R, Ming YA, Wang Y, Chen R. Facile inverse micelle fabrication of magnetic ordered mesoporous iron cerium bimetal oxides with excellent performance for arsenic removal from water. JOURNAL OF HAZARDOUS MATERIALS 2020; 383:121172. [PMID: 31522062 DOI: 10.1016/j.jhazmat.2019.121172] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Revised: 08/27/2019] [Accepted: 09/05/2019] [Indexed: 06/10/2023]
Abstract
In this study, magnetic ordered mesoporous Fe/Ce bimetal oxides (OMICs) were successfully synthesized via the modified sol-gel-based inverse micelle method. The textural/structure properties, surface chemistry and adsorption behavior of OMICs could be easily adjusted by using the calcination temperature. The sintering of samples would decrease the surface area, while expand the pore and crystallite size, which resulted in the formation of highly ordered inner-connected structure. Compared with pure mesoporous iron oxides (MI) and mesoporous cerium oxides (MC), this ordered mesoporous iron-cerium bimetal oxides (OMIC-3, 450 °C) exhibited remarkable arsenic adsorption performance. The maximum adsorption capacities of As(III) and As(V) for OMIC-3 were 281.34 and 216.72 mg/g, respectively, and both As(III)/As(V) adsorption kinetics were well described by the pseudo-second order. The ionic strength and coexisting ions (except SiO32- and PO43-) did not affect arsenic removal, while humic acid (HA) significantly influenced on the arsenic removal even at a lower concentration. The adsorption mechanism study revealed that both the surface charge and surface M-OH groups of OMIC-3 were played the key roles in arsenic removal. The reusable property suggested that this magnetic OMIC-3 was a promising excellent adsorbent for decontamination of arsenic-polluted (especially As(III)-polluted) wastewater.
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Affiliation(s)
- Zhipan Wen
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, People's Republic of China.
| | - Jun Lu
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, People's Republic of China
| | - Yalei Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, People's Republic of China
| | - Gang Cheng
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, People's Republic of China.
| | - Shengnan Huang
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, People's Republic of China
| | - Jin Chen
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, People's Republic of China
| | - Rui Xu
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, People's Republic of China
| | - Yin-An Ming
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, People's Republic of China
| | - Yingru Wang
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, People's Republic of China
| | - Rong Chen
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, People's Republic of China.
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25
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Highly selective oxidation of amines to imines by Mn2O3 catalyst under eco-friendly conditions. CHINESE CHEM LETT 2019. [DOI: 10.1016/j.cclet.2019.09.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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26
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Li X, Zheng J, Liu S, Zhu T. A novel wormhole-like mesoporous hybrid MnCoO catalyst for improved ethanol catalytic oxidation. J Colloid Interface Sci 2019; 555:667-675. [DOI: 10.1016/j.jcis.2019.07.062] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 07/21/2019] [Accepted: 07/24/2019] [Indexed: 11/25/2022]
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27
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Liu G, You S, Zhang Y, Huang H, Spanjers H. Conjugated donor-acceptor (D-A) supramolecule catalyst for visible-light-driven photocatalytic removal of bromate in water. J Colloid Interface Sci 2019; 553:666-673. [DOI: 10.1016/j.jcis.2019.06.072] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 06/19/2019] [Accepted: 06/21/2019] [Indexed: 10/26/2022]
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28
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Lu XF, Chen Y, Wang S, Gao S, Lou XWD. Interfacing Manganese Oxide and Cobalt in Porous Graphitic Carbon Polyhedrons Boosts Oxygen Electrocatalysis for Zn-Air Batteries. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1902339. [PMID: 31348572 DOI: 10.1002/adma.201902339] [Citation(s) in RCA: 155] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 06/18/2019] [Indexed: 05/21/2023]
Abstract
Rational design and synthesis of highly active and robust bifunctional non-noble electrocatalysts for both oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are urgently required for efficient rechargeable metal-air batteries. Herein, abundant MnO/Co heterointerfaces are engineered in porous graphitic carbon (MnO/Co/PGC) polyhedrons via a facile hydrothermal-calcination route with a bimetal-organic framework as the precursor. The in situ generated Co nanocrystals not only create well-defined heterointerfaces with high conductivity to overcome the poor OER activity but also promote the formation of robust graphitic carbon. Owing to the desired composition and formation of the heterostructures, the resulting MnO/Co/PGC exhibits superior activity and stability toward both OER and ORR, which makes it an efficient air cathode for the rechargeable Zn-air battery. Importantly, the homemade Zn-air battery is able to deliver excellent performance including a peak power density of 172 mW cm-2 and a specific capacity of 872 mAh g-1 , as well as excellent cycling stability (350 cycles), outperforming commercial mixed Pt/C||RuO2 catalysts. This work highlights the synergy from heterointerfaces in oxygen electrocatalysis, thus providing a promising approach for advanced metal-air cathode materials.
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Affiliation(s)
- Xue Feng Lu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Ye Chen
- School of Materials Science and Engineering, Henan Normal University, Xinxiang, Henan, 453007, P. R. China
| | - Sibo Wang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Shuyan Gao
- School of Materials Science and Engineering, Henan Normal University, Xinxiang, Henan, 453007, P. R. China
| | - Xiong Wen David Lou
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
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29
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Zhang L, Jin L, Yang Y, Kerns P, Su X, Meng M, Liu B, He J. Oxidative nucleation and growth of Janus-type MnO x-Ag and MnO x-AgI nanoparticles. NANOSCALE 2019; 11:15147-15155. [PMID: 31373342 DOI: 10.1039/c9nr03787j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Janus nanoparticles (NPs) containing two chemically distinct materials in one system are of great significance for catalysis in terms of harnessing catalytic synergies that do not exist in either component. We herein present a novel synthetic method of two Janus-type MnOx-Ag and MnOx-AgI NPs. The synthesis of Janus-type MnOx-AgI NPs is based on the oxidative nucleation and growth of Ag domains on MnO first and the subsequent iodization of Ag. A mild and non-disruptive iodization strategy is developed to yield Janus MnOx-AgI NPs, in which converting Ag to AgI domains with iodomethane (CH3I) is achieved through partial iodization. Simultaneously, Mn2+ species in the primary MnO octahedra are oxidized during the growth of Ag NPs, leading to the formation of amorphous p-type MnOx domains. Therefore, the as-resultant Janus-type MnOx-AgI NPs combining two semiconductors into an integrated nanostructure can be used as an efficient photocatalyst for visible-light-driven water oxidation. Janus MnOx-AgI NPs show an expected photocatalytic activity even in the absence of Ru(bpy)3Cl2 as an electron mediator. This intriguing synthesis may offer a new opportunity to develop asymmetric nanostructures of two semiconductors that will potentially be efficient photocatalysts for solar-driven water splitting.
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Affiliation(s)
- Lei Zhang
- Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China.
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30
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Hu Y, Zhang Y, Li C, Wang L, Du Y, Mo G, Li X, Cheetham AK, Wang J. Guided Assembly of Microporous/Mesoporous Manganese Phosphates by Bifunctional Organophosphonic Acid Etching and Templating. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1901124. [PMID: 31062894 DOI: 10.1002/adma.201901124] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 04/03/2019] [Indexed: 06/09/2023]
Abstract
Manganese (Mn)-based compounds are important materials for both energy conversion and energy storage. Unfortunately, it has been a significant challenge to develop highly ordered microporous/mesoporous structures for them to provide more active sites for these applications. In order to do so using the soft-templating method, three conditions have to be met, namely, a strong interaction between the inorganic precursor and the organic templates; eliminating the formation of bulk manganese phosphate; and the preservation of the manganese phosphate framework without it collapsing upon template removal. Herein, a soft-templating approach is reported using an organophosphonic acid (n-hexylphosphonic acid) as both the etching and the templating agent, followed by high-vacuum-assisted annealing. This approach simultaneously satisfies the above conditions. Both microporous and mesoporous manganese phosphates with uniform pore sizes and well-defined pore structures are obtained. The utilization of the organophosphonic acid is shown to be the key in the transformation from bulk manganese oxide into a highly ordered microporous phosphate. A very high surface area of 304.1 m2 g-1 is obtained for the microporous manganese phosphate, which is the highest among the reported values for Mn-based compounds. The ultrafine micropores and high specific surface area of our manganese phosphate promote electrocatalytic activity for the oxygen evolution reaction.
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Affiliation(s)
- Yating Hu
- Department of Materials Science & Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117576, Singapore
| | - Yu Zhang
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis, Singapore, 138634, Singapore
| | - Changjian Li
- Department of Materials Science & Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117576, Singapore
| | - Ling Wang
- Department of Materials Science & Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117576, Singapore
| | - Yonghua Du
- Institute of Chemical and Engineering Sciences, Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island, Singapore, 627833, Singapore
| | - Guang Mo
- Beijing Synchrotron Energy Physics, Institute of High Energy Physics, Chinese Academy of Sciences (CAS), Beijing, 19B Yuquan Road, Shijingshan District, Beijing, 100049, China
| | - Xu Li
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis, Singapore, 138634, Singapore
| | - Anthony K Cheetham
- Department of Materials Science & Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117576, Singapore
| | - John Wang
- Department of Materials Science & Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117576, Singapore
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31
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Ouyang J, Zhao Z, Yang H, He J, Suib SL. Surface redox characters and synergetic catalytic properties of macroporous ceria-zirconia solid solutions. JOURNAL OF HAZARDOUS MATERIALS 2019; 366:54-64. [PMID: 30502573 DOI: 10.1016/j.jhazmat.2018.11.083] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 10/26/2018] [Accepted: 11/21/2018] [Indexed: 06/09/2023]
Abstract
Macroporous CeO2-ZrO2 (CZ) solid solutions with gradually changing ceria content were prepared through the EISA method. Pore sizes of the samples are about 100 nm-1 μm and pore walls are 100 nm-1.5 μm. The surface and near surface reduction bands of Ce4+ below 600 °C were maximized for the Ce0.5Zr0.5O2 sample (C5) according to the quantitative de-convolution to the acquired TPR curves. The area percentage of the O2-2p6 → Ce3+3d94f2 electronic transition band on XPS spectra, which related to the concentration of the Ce3+, was found to be a function of the ceria content. The oxygen storage capacity showed a positive relationship with the chemical compositions. Redox reactions below 600 °C play a key role in determining the reduction performances of ceria based TWCs. Three-way catalytic performances of the Pd + Rh + Pt /C5 sample showed an ignition temperature for CO and NOx at about 240 °C, and finished before 300 °C. The ignition of C3H8 started at 270 °C while finished at differed samples. The maximum catalytic efficiencies of CO, NOx, and C3H8 on C5 sample were revealed to 100%, 98%, and 97%, respectively. The performances showed that porous CZ solid solutions are suitable for high performance catalytic applications.
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Affiliation(s)
- Jing Ouyang
- Centre for Mineral Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Hunan Key Lab of Mineral Materials and Application, Central South University, Changsha 410083, China; Key Lab of Clay Mineral Functional Materials in China Building Materials Industry, Changsha 410083, China; Department of Chemistry, University of Connecticut, Storrs, CT 06269-3060, USA.
| | - Zai Zhao
- Centre for Mineral Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Hunan Key Lab of Mineral Materials and Application, Central South University, Changsha 410083, China; Key Lab of Clay Mineral Functional Materials in China Building Materials Industry, Changsha 410083, China
| | - Huaming Yang
- Centre for Mineral Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Hunan Key Lab of Mineral Materials and Application, Central South University, Changsha 410083, China; Key Lab of Clay Mineral Functional Materials in China Building Materials Industry, Changsha 410083, China
| | - Junkai He
- Department of Chemistry, University of Connecticut, Storrs, CT 06269-3060, USA
| | - Steven L Suib
- Department of Chemistry, University of Connecticut, Storrs, CT 06269-3060, USA.
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32
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Yang Y, Su X, Zhang L, Kerns P, Achola L, Hayes V, Quardokus R, Suib SL, He J. Intercalating MnO
2
Nanosheets With Transition Metal Cations to Enhance Oxygen Evolution. ChemCatChem 2019. [DOI: 10.1002/cctc.201802019] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yue Yang
- Department of Chemical Engineering Nanjing University of Science and Technology Nanjing 210094 China
- Department of Chemistry University of Connecticut Storrs CT 06269 USA
| | - Xingsong Su
- Department of Chemistry University of Connecticut Storrs CT 06269 USA
| | - Lei Zhang
- Department of Chemistry University of Connecticut Storrs CT 06269 USA
| | - Peter Kerns
- Department of Chemistry University of Connecticut Storrs CT 06269 USA
| | - Laura Achola
- Department of Chemistry University of Connecticut Storrs CT 06269 USA
| | - Veronica Hayes
- Department of Chemistry University of Connecticut Storrs CT 06269 USA
| | - Rebecca Quardokus
- Department of Chemistry University of Connecticut Storrs CT 06269 USA
| | - Steven L. Suib
- Department of Chemistry University of Connecticut Storrs CT 06269 USA
- Institute of Materials Science University of Connecticut Storrs CT 06269 USA
- Department of Chemical & Biomolecular Engineering University of Connecticut Storrs CT 06269 USA
| | - Jie He
- Department of Chemistry University of Connecticut Storrs CT 06269 USA
- Institute of Materials Science University of Connecticut Storrs CT 06269 USA
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33
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Zhang L, Jin L, Liu B, He J. Templated Growth of Crystalline Mesoporous Materials: From Soft/Hard Templates to Colloidal Templates. Front Chem 2019; 7:22. [PMID: 30805330 PMCID: PMC6371053 DOI: 10.3389/fchem.2019.00022] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 01/10/2019] [Indexed: 11/13/2022] Open
Abstract
Mesoporous non-siliceous materials, in particular mesoporous transition metal oxides (m-TMOs), are of interest due to their fascinating electronic, redox, and magnetic properties for a wide range of applications in catalysis and energy storage. Control of the porosity (e.g., pore size, wall thickness, and surface area) and the crystalline degree (e.g., phase composition, crystallinity, and crystal grain size) of m-TMOs are critical for those applications. To crystallize TMOs, high temperature annealing is often needed to remove the amorphous defects and/or tune the compositions of different crystalline phases. This has brought many challenges to surfactant or block copolymer templates used in the process of evaporation-induced-self-assembly to prepare m-TMOs. In this review, we summarize the most recent achievements including the findings in our own laboratory on the use of organosilicate-containing colloids for the templated growth of mesoporous materials. We review a few key examples of preparing crystalline mesoporous oxides using different templating methods. The colloidal templating method by which mesoporous nanostructures can be stabilized up to 1,000°C is highlighted. The applications of m-TMOs and meso metal-oxide hybrids synthesized using organosilicate-containing colloidal templates in photocatalysis and high-temperature catalysis are also discussed.
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Affiliation(s)
- Lei Zhang
- Jiangsu Key Laboratory of New Power Batteries, Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, China
- Department of Chemistry, University of Connecticut, Mansfield, CT, United States
| | - Lei Jin
- Department of Chemistry, University of Connecticut, Mansfield, CT, United States
| | - Ben Liu
- Jiangsu Key Laboratory of New Power Batteries, Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, China
| | - Jie He
- Department of Chemistry, University of Connecticut, Mansfield, CT, United States
- Institute of Materials Science, University of Connecticut, Mansfield, CT, United States
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34
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Wang S, Nam G, Li P, Jang H, Wang J, Kim MG, Wu Z, Liu X, Cho J. Mn
x
(PO4
)
y
/NPC As a High Performance Bifunctional Electrocatalyst for Oxygen Electrode Reactions. ChemCatChem 2019. [DOI: 10.1002/cctc.201801753] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Shuai Wang
- State Key Laboratory Base of Eco-chemical Engineering,College of Chemistry and Molecular Engineering; Qingdao University of Science & Technology; Qingdao 266042 P.R. China
| | - Gyutae Nam
- Department of Energy Engineering School of Energy and Chemical Engineering; Ulsan National Institute of Science and Technology (UNIST); Ulsan 689-798 Korea
| | - Ping Li
- State Key Laboratory Base of Eco-chemical Engineering,College of Chemistry and Molecular Engineering; Qingdao University of Science & Technology; Qingdao 266042 P.R. China
| | - Haeseong Jang
- Department of Energy Engineering School of Energy and Chemical Engineering; Ulsan National Institute of Science and Technology (UNIST); Ulsan 689-798 Korea
| | - Jia Wang
- State Key Laboratory Base of Eco-chemical Engineering,College of Chemistry and Molecular Engineering; Qingdao University of Science & Technology; Qingdao 266042 P.R. China
| | - Min Gyu Kim
- Beamline Research Division; Pohang Accelerator Laboratory (PAL); Pohang 790-784 Korea
| | - Zexing Wu
- State Key Laboratory Base of Eco-chemical Engineering,College of Chemistry and Molecular Engineering; Qingdao University of Science & Technology; Qingdao 266042 P.R. China
| | - Xien Liu
- State Key Laboratory Base of Eco-chemical Engineering,College of Chemistry and Molecular Engineering; Qingdao University of Science & Technology; Qingdao 266042 P.R. China
| | - Jaephil Cho
- Department of Energy Engineering School of Energy and Chemical Engineering; Ulsan National Institute of Science and Technology (UNIST); Ulsan 689-798 Korea
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35
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Xu X, Liang H, Tang G, Hong Y, Xie Y, Qi Z, Xu B, Wang Z. Accelerating the water splitting kinetics of CoP microcubes anchored on a graphene electrocatalyst by Mn incorporation. NANOSCALE ADVANCES 2019; 1:177-183. [PMID: 36132440 PMCID: PMC9473208 DOI: 10.1039/c8na00261d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 11/19/2018] [Indexed: 05/28/2023]
Abstract
CoP is considered as an efficient electrocatalyst for the hydrogen evolution reaction (HER) in acidic electrolytes but its performance in alkaline solutions is generally poor because of its slow reaction kinetics, which further limits its application in overall water splitting. Herein, we demonstrate a strategy to greatly accelerate its HER and OER kinetics in alkaline solutions through Mn incorporation. Ternary Mn x Co1-x P microcubes with a tunable Mn/Co ratio strongly anchored on rGO were synthesized using Prussian blue analogues as precursors. The synergy between the high activity of Mn x Co1-x P microcubes and the good conductivity of rGO leads to the superior performance of the hybrid toward water splitting in 1 M KOH. The optimized Mn0.6Co0.4P-rGO electrocatalyst shows high activity and stability towards both the HER and OER with low overpotentials of 54 and 250 mV at 10 mA cm-2, respectively. Furthermore, the water electrolyzer using Mn0.6Co0.4P-rGO as both the cathode and anode only requires a cell voltage as low as 1.55 V to reach a current density of 10 mA cm-2, making Mn0.6Co0.4P-rGO a competitive and cost-effective electrocatalyst for water splitting.
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Affiliation(s)
- Xun Xu
- College of Chemistry and Chemical Engineering, Xiamen University Xiamen 361005 China
- School of Materials and Mechanical & Electrical Engineering, Jiangxi Science and Technology Normal University Nanchang 330013 China
| | - Hanfeng Liang
- Materials Science and Engineering, King Abdullah University of Science and Technology Thuwal 23955 Saudi Arabia
| | - Guisheng Tang
- College of Chemistry and Chemical Engineering, Xiamen University Xiamen 361005 China
| | - Yingling Hong
- College of Chemistry and Chemical Engineering, Xiamen University Xiamen 361005 China
| | - Yaqiang Xie
- College of Chemistry and Chemical Engineering, Xiamen University Xiamen 361005 China
| | - Zhengbing Qi
- College of Materials Science and Engineering, Xiamen University of Technology Xiamen 361024 China
| | - Binbin Xu
- College of Chemistry and Chemical Engineering, Xiamen University Xiamen 361005 China
| | - Zhoucheng Wang
- College of Chemistry and Chemical Engineering, Xiamen University Xiamen 361005 China
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36
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Ekebas E, Cetin A, Önal AM, Nalbant Esenturk E. Magnesium substituted cobalt spinel nanostructures for electrocatalytic water oxidation. J APPL ELECTROCHEM 2019. [DOI: 10.1007/s10800-018-01285-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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37
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N. S, L. S, Adarakatti PS, Hughes JP, Rowley-Neale SJ, Banks CE, S. A. In situ addition of graphitic carbon into a NiCo2O4/CoO composite: enhanced catalysis toward the oxygen evolution reaction. RSC Adv 2019; 9:24995-25002. [PMID: 35528657 PMCID: PMC9069886 DOI: 10.1039/c9ra05195c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 08/04/2019] [Indexed: 12/13/2022] Open
Abstract
A facile synthesis technique for the production of NiCo2O4/CoO and graphite composites that demonstrate efficient electrocatalysis towards the oxygen evolution reaction.
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Affiliation(s)
- Srinivasa N.
- Department of Chemistry
- School of Engineering
- Dayananda Sagar University
- Bangalore
- India
| | - Shreenivasa L.
- Department of Chemistry
- School of Engineering
- Dayananda Sagar University
- Bangalore
- India
| | | | - Jack P. Hughes
- Faculty of Science and Engineering
- Manchester Metropolitan University
- Manchester M1 5GD
- UK
- Manchester Fuel Cell Innovation Centre
| | - Samuel J. Rowley-Neale
- Faculty of Science and Engineering
- Manchester Metropolitan University
- Manchester M1 5GD
- UK
- Manchester Fuel Cell Innovation Centre
| | - Craig E. Banks
- Faculty of Science and Engineering
- Manchester Metropolitan University
- Manchester M1 5GD
- UK
- Manchester Fuel Cell Innovation Centre
| | - Ashoka S.
- Department of Chemistry
- School of Engineering
- Dayananda Sagar University
- Bangalore
- India
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38
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Adhikary SD, Tiwari A, Nagaiah TC, Mandal D. Stabilization of Cobalt-Polyoxometalate over Poly(ionic liquid) Composites for Efficient Electrocatalytic Water Oxidation. ACS APPLIED MATERIALS & INTERFACES 2018; 10:38872-38879. [PMID: 30339354 DOI: 10.1021/acsami.8b12592] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The key to unlock a renewable, clean, and energy-dense hydrogen fuel lies in designing an efficient oxygen evolving catalyst exhibiting high activity, stability, and cost-effectiveness. This report addresses an improved activity toward oxygen evolution by a composite of cobalt-polyoxometalate [Co4(H2O)2(PW9O34)2]10- (CoPOM) and an ionic polymer, poly(vinyl butyl imidazolium) (PVIM), in highly alkaline media. PVIM provides a stable platform for CoPOM and acts as a conductive linker between CoPOM and the electrode surface, forming a concrete solid composite, which balances the multinegative charge of CoPOM synergistically. This improved stability and conductivity of CoPOM by PVIM in the PVIM-CoPOM composite performs remarkable electrocatalytic water oxidation with a very low overpotential of 0.20 V and a very high current density of 250 mA/cm2 (at 1.75 V vs RHE) with a turnover frequency (TOF) of 52.8 s-1 in 1 M NaOH.
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Affiliation(s)
- Subhasis D Adhikary
- Department of Chemistry , Indian Institute of Technology Ropar , Rupnagar , Punjab 140001 , India
| | - Aarti Tiwari
- Department of Chemistry , Indian Institute of Technology Ropar , Rupnagar , Punjab 140001 , India
| | - Tharamani C Nagaiah
- Department of Chemistry , Indian Institute of Technology Ropar , Rupnagar , Punjab 140001 , India
| | - Debaprasad Mandal
- Department of Chemistry , Indian Institute of Technology Ropar , Rupnagar , Punjab 140001 , India
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39
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Selvakumar K, Kumar SMS, Thangamuthu R, Rajput P, Bhattacharyya D, Jha SN. 2D and 3D Silica‐Template‐Derived MnO
2
Electrocatalysts towards Enhanced Oxygen Evolution and Oxygen Reduction Activity. ChemElectroChem 2018. [DOI: 10.1002/celc.201801143] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Karuppiah Selvakumar
- Materials Electrochemistry DivisionCSIR-Central Electrochemical Research Institute Karaikudi, Tamil Nadu 630 003 India
| | | | - Rangasamy Thangamuthu
- Materials Electrochemistry DivisionCSIR-Central Electrochemical Research Institute Karaikudi, Tamil Nadu 630 003 India
| | - Parasmani Rajput
- Atomic & Molecular Physics DivisionBhabha Atomic Research Center Trombay Mumbai- 400 085 India
| | - Dibyendu Bhattacharyya
- Atomic & Molecular Physics DivisionBhabha Atomic Research Center Trombay Mumbai- 400 085 India
| | - Shambhu Nath Jha
- Atomic & Molecular Physics DivisionBhabha Atomic Research Center Trombay Mumbai- 400 085 India
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40
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Cheng Y, Huang T, Cheng L, Sun Y, Zhu L, Li Y. Structural characteristic and ammonium and manganese catalytic activity of two types of filter media in groundwater treatment. J Environ Sci (China) 2018; 72:89-97. [PMID: 30244754 DOI: 10.1016/j.jes.2017.12.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 12/22/2017] [Accepted: 12/22/2017] [Indexed: 06/08/2023]
Abstract
Two types of filter media in groundwater treatment were conducted for a comparative study of surface structure and catalytic performance. Natural filter media was adopted from a conventional aeration-filtration groundwater treatment plant, and active filter media as a novel and promising filter media was also adopted. The physicochemical properties of these two kinds of filter media were characterized using numerous analytical techniques, such as X-Ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive X-ray (EDX), X-ray photoelectron spectroscopy (XPS) and Zeta potential. The catalytic activities of these filter media were evaluated for ammonium and manganese oxidation. XRD data showed that both active filter media and natural filter media belonged to birnessite family. A new manganese dioxide (MnO2) phase (PDF#72-1982) was found in the structure of natural filter media. The SEM micrograph of natural filter media showed honeycomb structures and the active filter media presented plate structures and consisted of stacked particle. These natural filter media presented lower level of some trace elements such as calcium and magnesium, lower degree of crystallinity, lower Mn(III) content and lattice oxygen content than that of active filter media, which were associated with its poor ammonium and manganese catalytic activities. In addition, some γ-Fe2O3 and MnCO3 were found in the coating which may hinder the ammonium and manganese catalytic oxidation. This study provides a thorough and comprehensive understanding about the most commonly used filter media in water treatment, which can provide a theoretical guide to practical applications.
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Affiliation(s)
- Ya Cheng
- Key Laboratory of Northwest Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Tinglin Huang
- Key Laboratory of Northwest Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
| | - Lijie Cheng
- Key Laboratory of Northwest Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Yuankui Sun
- Key Laboratory of Northwest Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Laisheng Zhu
- Key Laboratory of Northwest Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Ye Li
- Key Laboratory of Northwest Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
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41
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Liang Z, Huang Z, Yuan H, Yang Z, Zhang C, Xu Y, Zhang W, Zheng H, Cao R. Quasi-single-crystalline CoO hexagrams with abundant defects for highly efficient electrocatalytic water oxidation. Chem Sci 2018; 9:6961-6968. [PMID: 30210770 PMCID: PMC6124914 DOI: 10.1039/c8sc02294a] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 07/20/2018] [Indexed: 01/13/2023] Open
Abstract
Defects and structural long-range ordering have been recognized as two crucial characters for advanced electrocatalysts. However, these two features have rarely been achieved together. Herein, we report the preparation of single-crystalline CoO hexagrams and demonstrate their exceptional electrocatalytic properties for water oxidation. The quasi-single-crystalline CoO hexagrams, prepared at the critical phase transition point of β-Co(OH)2/Co(OH)F hexagrams, possess both abundant oxygen vacancies as defects and structural long-range ordering. The matching between the b-axis of Co(OH)F crystals and the a-axis of β-Co(OH)2 crystals is critical for the formation of the CoO hexagram single crystals. The quasi-single-crystalline CoO hexagrams with abundant defects are highly efficient for water oxidation by delivering a 10 mA cm-2 current density at a low overpotential of 269 mV in a 1 M KOH aqueous solution.
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Affiliation(s)
- Zuozhong Liang
- Key Laboratory of Applied Surface and Colloid Chemistry , Ministry of Education , School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , China .
| | - Zhehao Huang
- Department of Materials and Environmental Chemistry , Stockholm University , SE-10691 Stockholm , Sweden
| | - Haitao Yuan
- Key Laboratory of Applied Surface and Colloid Chemistry , Ministry of Education , School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , China .
| | - Zhiyuan Yang
- Key Laboratory of Applied Surface and Colloid Chemistry , Ministry of Education , School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , China .
| | - Chaochao Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry , Ministry of Education , School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , China .
| | - Yang Xu
- Key Laboratory of Applied Surface and Colloid Chemistry , Ministry of Education , School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , China .
| | - Wei Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry , Ministry of Education , School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , China .
| | - Haoquan Zheng
- Key Laboratory of Applied Surface and Colloid Chemistry , Ministry of Education , School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , China .
| | - Rui Cao
- Key Laboratory of Applied Surface and Colloid Chemistry , Ministry of Education , School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , China .
- Department of Chemistry , Renmin University of China , Beijing , 100872 , China .
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Han Y, Yu Y, Zhang L, Huang L, Zhai J, Dong S. Facile synthesis of Ni based metal-organic frameworks wrapped MnO2 nanowires with high performance toward electrochemical oxygen evolution reaction. Talanta 2018; 186:154-161. [DOI: 10.1016/j.talanta.2018.04.026] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 04/06/2018] [Accepted: 04/07/2018] [Indexed: 11/29/2022]
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43
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Cation-exchange-inducing MnNi-spinel nanocage/rGO as efficient electrocatalysts for water oxidation. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.05.131] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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44
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Zhang T, Tham NN, Liu Z, Fisher A, Lee JY. Promotion of the bifunctional electrocatalytic oxygen activity of manganese oxides with dual-affinity phosphate. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.05.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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45
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Tehseen B, Rehman A, Rahmat M, Bhatti HN, Wu A, Butt FK, Naz G, Khan WS, Bajwa SZ. Solution growth of 3D MnO 2 mesh comprising 1D nanofibres as a novel sensor for selective and sensitive detection of biomolecules. Biosens Bioelectron 2018; 117:852-859. [PMID: 30096740 DOI: 10.1016/j.bios.2018.06.061] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 06/11/2018] [Accepted: 06/27/2018] [Indexed: 12/23/2022]
Abstract
This work is the first report describing the solution grown 3D manganese oxide nanofibrous (MnO2 NFs) mesh and its potential for the simultaneous detection of biomolecules such as ascorbic acid and uric acid. The mesh is synthesized by a facile, one-pot, and cost-effective hydrothermal approach without using any template or structure directing compound. The morphology consists of randomly placed nanofibres possessing a diameter in the range of 10-25 nm, and length of several micron; constituting a highly porous and flexible material. The electrochemical potential was examined by recording cyclic voltammetry signals towards ascorbic acid and uric acid. The special mesh morphology offers a large surface area to promote enhanced electrochemical activity, and also provided a macroporous network that supported efficient mass transport. Additionally, the strong electronic cloud and roughness of MnO2 NFs mesh facilitated the fast oxidation of species at very low potential. The lower detection limit was found to be 1.33 µM (S/N = 3) and 1.03 µM (S/N = 3) for ascorbic acid and uric acid, respectively. The MnO2 NFs mesh modified electrodes can robustly differentiate both of them by giving well separate signals (Δ = 500 mV) indicating capability of the material towards selective detection. The sensor has been successfully applied to human blood and urine samples and the recoveries were found statistically significant. These results demonstrate the practical feasibility of 3D mesh to develop sensors for the accurate diagnosis of clinically important molecules.
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Affiliation(s)
- Bushra Tehseen
- Nanobiotechnology Group, National Institute for Biotechnology and Genetic Engineering (NIBGE), P.O. Box No.577, Jhang Road, Faisalabad, Pakistan; Pakistan Institute of Engineering and Applied Sciences, Nilore, Islamabad, Pakistan
| | - Asma Rehman
- Nanobiotechnology Group, National Institute for Biotechnology and Genetic Engineering (NIBGE), P.O. Box No.577, Jhang Road, Faisalabad, Pakistan.
| | - Muniba Rahmat
- Department of Chemistry, University of Agriculture, Faisalabad, Pakistan
| | - Haq Nawaz Bhatti
- Department of Chemistry, University of Agriculture, Faisalabad, Pakistan
| | - Aiguo Wu
- Nanobiomaterials Group, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences (CAS), Ninbgo City, Zhejiang, China
| | - Faheem K Butt
- Department of Physics, Division of Science and Technology, University of Education, College Road, Township, Lahore, Pakistan
| | - Gul Naz
- Department of Physics, Faculty of Science, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan
| | - Waheed S Khan
- Nanobiotechnology Group, National Institute for Biotechnology and Genetic Engineering (NIBGE), P.O. Box No.577, Jhang Road, Faisalabad, Pakistan; Nanobiomaterials Group, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences (CAS), Ninbgo City, Zhejiang, China.
| | - Sadia Z Bajwa
- Nanobiotechnology Group, National Institute for Biotechnology and Genetic Engineering (NIBGE), P.O. Box No.577, Jhang Road, Faisalabad, Pakistan.
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46
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Barreca D, Bigiani L, Monai M, Carraro G, Gasparotto A, Sada C, Martí-Sanchez S, Grau-Carbonell A, Arbiol J, Maccato C, Fornasiero P. Supported Mn 3O 4 Nanosystems for Hydrogen Production through Ethanol Photoreforming. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:4568-4574. [PMID: 29624397 DOI: 10.1021/acs.langmuir.8b00642] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Photoreforming promoted by metal oxide nanophotocatalysts is an attractive route for clean and sustainable hydrogen generation. In the present work, we propose for the first time the use of supported Mn3O4 nanosystems, both pure and functionalized with Au nanoparticles (NPs), for hydrogen generation by photoreforming. The target oxide systems, prepared by chemical vapor deposition (CVD) and decorated with gold NPs by radio frequency (RF) sputtering, were subjected to a thorough chemico-physical characterization and utilized for a proof-of-concept H2 generation in aqueous ethanolic solutions under simulated solar illumination. Pure Mn3O4 nanosystems yielded a constant hydrogen production rate of 10 mmol h-1 m-2 even for irradiation times up to 20 h. The introduction of Au NPs yielded a significant enhancement in photocatalytic activity, which decreased as a function of irradiation time. The main phenomena causing the Au-containing photocatalyst deactivation have been investigated by morphological and compositional analysis, providing important insights for the design of Mn3O4-based photocatalysts with improved performances.
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Affiliation(s)
- Davide Barreca
- CNR-ICMATE and INSTM, Department of Chemical Sciences , Padova University , Via F. Marzolo, 1 , 35131 Padova , Italy
| | - Lorenzo Bigiani
- Department of Chemical Sciences , Padova University and INSTM , Via F. Marzolo, 1 , 35131 Padova , Italy
| | - Matteo Monai
- Inorganic Chemistry and Catalysis Group - Debye Institute for Nanomaterials Science , Utrecht University , Universiteitsweg, 99 , 3584 CG Utrecht , The Netherlands
- Department of Chemical and Pharmaceutical Sciences, ICCOM-CNR and INSTM , Trieste University , Via L. Giorgieri, 1 , 34127 Trieste , Italy
| | - Giorgio Carraro
- Department of Chemical Sciences , Padova University and INSTM , Via F. Marzolo, 1 , 35131 Padova , Italy
| | - Alberto Gasparotto
- Department of Chemical Sciences , Padova University and INSTM , Via F. Marzolo, 1 , 35131 Padova , Italy
| | - Cinzia Sada
- Department of Physics and Astronomy , Padova University and INSTM , Via F. Marzolo, 8 , 35131 Padova , Italy
| | - Sara Martí-Sanchez
- Catalan Institute of Nanoscience and Nanotechnology (ICN2) , CSIC and BIST , Bellaterra, 08193 Barcelona , Catalonia , Spain
| | - Albert Grau-Carbonell
- Catalan Institute of Nanoscience and Nanotechnology (ICN2) , CSIC and BIST , Bellaterra, 08193 Barcelona , Catalonia , Spain
| | - Jordi Arbiol
- Catalan Institute of Nanoscience and Nanotechnology (ICN2) , CSIC and BIST , Bellaterra, 08193 Barcelona , Catalonia , Spain
- ICREA , Pg. Lluís Companys, 23 , 08010 Barcelona , Catalonia , Spain
| | - Chiara Maccato
- Department of Chemical Sciences , Padova University and INSTM , Via F. Marzolo, 1 , 35131 Padova , Italy
| | - Paolo Fornasiero
- Department of Chemical and Pharmaceutical Sciences, ICCOM-CNR and INSTM , Trieste University , Via L. Giorgieri, 1 , 34127 Trieste , Italy
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Abstract
Electrolysis of water is key technology, not only for clean energy production, but to ensure a continued supply of hydrogen beyond fossil resources, essential to the manufacture of many chemical goods other than fuels. Cobalt nanomaterials have been widely identified as a promising candidate for the anode (oxygen evolution) reaction in this process, but much work has focused on applied materials or electrode design. Given the importance of oxidation state changes Co(III) → Co(IV) in the accepted reaction mechanism, in this work we look at size effects in small (4–10 nm) cobalt nanoparticles, where the ease of oxidation for lower cobalt oxidation states is known to change with particle size. To discriminate between geometric and chemical effects we have compared the catalysts in this study to others in the literature by turnover frequency (widely used in other areas of catalysis), in addition to the more commonly employed performance metric of the overpotential required to produce a current density of 10 mA cm−2. Comparisons are drawn to key examples of using well defined nanomaterials (where the surface are of cobalt sites can be estimated). This has enabled an estimated intrinsic turnover rate of ~ 1 O2 molecule per surface Co atom per second at an overpotential of 500 mV in the oxygen evolution reaction under typical alkaline reaction conditions (pH 14.0) to be identified.
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Affiliation(s)
- Edward Locke
- Department of Chemistry, University of Durham, South Road, Durham, DH1 3LE UK
| | - Shan Jiang
- Department of Chemistry, University of Durham, South Road, Durham, DH1 3LE UK
| | - Simon K Beaumont
- Department of Chemistry, University of Durham, South Road, Durham, DH1 3LE UK
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48
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van Oversteeg CHM, Doan HQ, de Groot FMF, Cuk T. In situ X-ray absorption spectroscopy of transition metal based water oxidation catalysts. Chem Soc Rev 2018; 46:102-125. [PMID: 27834973 DOI: 10.1039/c6cs00230g] [Citation(s) in RCA: 97] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
X-ray absorption studies of the geometric and electronic structure of primarily heterogeneous Co, Ni, and Mn based water oxidation catalysts are reviewed. The X-ray absorption near edge and extended X-ray absorption fine structure studies of the metal K-edge, characterize the metal oxidation state, metal-oxygen bond distance, metal-metal distance, and degree of disorder of the catalysts. These properties guide the coordination environment of the transition metal oxide radical that localizes surface holes and is required to oxidize water. The catalysts are investigated both as-prepared, in their native state, and under reaction conditions, while transition metal oxide radicals are generated. The findings of many experiments are summarized in tables. The advantages of future X-ray experiments on water oxidation catalysts, which include the limited data available of the oxygen K-edge, metal L-edge, and resonant inelastic X-ray scattering, are discussed.
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Affiliation(s)
| | - Hoang Q Doan
- Department of Chemistry, University of California - Berkeley, 419 Latimer Hall, Berkeley, CA 94720, USA.
| | - Frank M F de Groot
- Department of Chemistry, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands.
| | - Tanja Cuk
- Department of Chemistry, University of California - Berkeley, 419 Latimer Hall, Berkeley, CA 94720, USA.
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49
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Wang X, Liu J, Qu R, Wang Z, Huang Q. The laccase-like reactivity of manganese oxide nanomaterials for pollutant conversion: rate analysis and cyclic voltammetry. Sci Rep 2017; 7:7756. [PMID: 28798337 PMCID: PMC5552746 DOI: 10.1038/s41598-017-07913-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Accepted: 06/30/2017] [Indexed: 01/07/2023] Open
Abstract
Nanostructured manganese oxides, e.g. MnO2, have shown laccase-like catalytic activities, and are thus promising for pollutant oxidation in wastewater treatment. We have systematically compared the laccase-like reactivity of manganese oxide nanomaterials of different crystallinity, including α-, β-, γ-, δ-, and ɛ-MnO2, and Mn3O4, with 2,2′-azinobis-(3-ethylbenzthiazoline-6-sulfonate) (ABTS) and 17β-estradiol (E2) as the probing substrates. The reaction rate behaviors were examined with regard to substrate oxidation and oxygen reduction to evaluate the laccase-like catalysis of the materials, among which γ-MnO2 exhibits the best performance. Cyclic voltammetry (CV) was employed to assess the six MnOx nanomaterials, and the results correlate well with their laccase-like catalytic activities. The findings help understand the mechanisms of and the factors controlling the laccase-like reactivity of different manganese oxides nanomaterials, and provide a basis for future design and application of MnOx-based catalysts.
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Affiliation(s)
- Xinghao Wang
- State Key Laboratory of Pollution Control and Resources Reuses, School of the Environment, Nanjing University, Nanjing, 210023, P. R. China.,College of Agricultural and Environmental Sciences, Department of Crop and Soil Sciences, University of Georgia, Griffin, Georgia, 30223, United States
| | - Jiaoqin Liu
- State Key Laboratory of Pollution Control and Resources Reuses, School of the Environment, Nanjing University, Nanjing, 210023, P. R. China
| | - Ruijuan Qu
- State Key Laboratory of Pollution Control and Resources Reuses, School of the Environment, Nanjing University, Nanjing, 210023, P. R. China.
| | - Zunyao Wang
- State Key Laboratory of Pollution Control and Resources Reuses, School of the Environment, Nanjing University, Nanjing, 210023, P. R. China
| | - Qingguo Huang
- College of Agricultural and Environmental Sciences, Department of Crop and Soil Sciences, University of Georgia, Griffin, Georgia, 30223, United States.
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50
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Rossini E, Knapp EW. Protonation equilibria of transition metal complexes: From model systems toward the Mn-complex in photosystem II. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.02.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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