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Kumar V, Mishra RK, Kumar P, Gwag JS. A comprehensive study on the electronic structure, dielectric and optical properties of alkali-earth metals and transition metal hydroxides M(OH) 2. LUMINESCENCE 2023; 38:1307-1318. [PMID: 36349979 DOI: 10.1002/bio.4405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 10/19/2022] [Accepted: 11/05/2022] [Indexed: 07/22/2023]
Abstract
In the present work, the physical properties of alkali-earth metal and transition metal hydroxides are comprehensively investigated using the density functional theory. Here, the alkali-earth metals Ca, Mg, and transition metals Cd, Zn are considered from the II-A and II-B groups in the periodic table of elements. The first principle electronic structure calculations show that these bulk hydroxide materials are direct band gap material. Ca(OH)2 and Mg(OH)2 exhibit an insulating behavior with a very large band gap. However, Cd(OH)2 and Zn(OH)2 are found to be wide band gap semiconductors. The dielectric and optical studies reveal that these materials have a high degree of anisotropy. Hence, the light propagation in these materials behaves differently in the direction perpendicular and parallel to the optical axis, and exhibits birefringence. Therefore, these materials may be useful for optical communication. The calculated electron energy loss suggests that these materials can also be used for unwanted signal noise suppression. The wide band gap makes them useful for high-power applications. Moreover, Ca(OH)2 and Mg(OH)2 are found to be suitable for dielectric medium.
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Affiliation(s)
- Vipin Kumar
- Department of Physics, Yeungnam University, Gyeongsan, Gyeongbuk, South Korea
| | | | - Pushpendra Kumar
- Department of Physics, Manipal University Jaipur, Jaipur, Rajasthan, India
- MSRC, Manipal University Jaipur, Jaipur, Rajasthan, India
| | - Jin Seog Gwag
- Department of Physics, Yeungnam University, Gyeongsan, Gyeongbuk, South Korea
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2
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Wang Y, Zhao Y, Liu L, Qin W, Liu S, Tu J, Qin Y, Liu J, Wu H, Zhang D, Chu A, Jia B, Qu X, Qin M. Mesoporous Single Crystals with Fe-Rich Skin for Ultralow Overpotential in Oxygen Evolution Catalysis. Adv Mater 2022; 34:e2200088. [PMID: 35289964 DOI: 10.1002/adma.202200088] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 03/10/2022] [Indexed: 06/14/2023]
Abstract
The oxygen evolution reaction (OER) is a key reaction in water splitting and metal-air batteries, and transition metal hydroxides have demonstrated the most electrocatalytic efficiency. Making the hydroxides thinner for more surface commonly fails to increase the active site number, because the real active sites are the edges. Up to now, the overpotentials of most state-of-the-art OER electrocatalysts at a current density of 10 mA cm-2 (η10 ) are still larger than 200 mV. Herein, a novel design of mesoporous single crystal (MSC) with an Fe-rich skin to boost the OER is shown. The edges around the mesopores provide lots of real active sites and the Fe modification on these sites further improves the intrinsic activity. As a result, an ultralow η10 of 185 mV is achieved, and the turnover frequency based on Fe atoms is as high as 16.9 s-1 at an overpotential of 350 mV. Moreover, the catalyst has an excellent catalytic stability, indicated by a negligible current drop after 10 000 cyclic voltammetry cycles. The catalyst enables Zn-air batteries to run stably over 270 h with a low charge voltage of 1.89 V. This work shows that MSC materials can provide new opportunities for the design of electrocatalysts.
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Affiliation(s)
- Yong Wang
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
| | - Yongzhi Zhao
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
| | - Luan Liu
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
| | - Wanjun Qin
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
| | - Sijia Liu
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
| | - Juping Tu
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
| | - Yunpu Qin
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
| | - Jianfang Liu
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
| | - Haoyang Wu
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
| | - Deyin Zhang
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
| | - Aimin Chu
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
- Hunan University of Science and Technology, School of Materials Science and Engineering, Xiangtan, 411201, China
| | - Baorui Jia
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
| | - Xuanhui Qu
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
- Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Mingli Qin
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
- Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, CB3 0FS, UK
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Zhang B, Wu Z, Shao W, Gao Y, Wang W, Ma T, Ma L, Li S, Cheng C, Zhao C. Interfacial Atom-Substitution Engineered Transition-Metal Hydroxide Nanofibers with High-Valence Fe for Efficient Electrochemical Water Oxidation. Angew Chem Int Ed Engl 2021; 61:e202115331. [PMID: 34936185 PMCID: PMC9306610 DOI: 10.1002/anie.202115331] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Indexed: 11/28/2022]
Abstract
Developing low‐cost electrocatalysts for efficient and robust oxygen evolution reaction (OER) is the key for scalable water electrolysis, for instance, NiFe‐based materials. Decorating NiFe catalysts with other transition metals offers a new path to boost their catalytic activities but often suffers from the low controllability of the electronic structures of the NiFe catalytic centers. Here, we report an interfacial atom‐substitution strategy to synthesize an electrocatalytic oxygen‐evolving NiFeV nanofiber to boost the activity of NiFe centers. The electronic structure analyses suggest that the NiFeV nanofiber exhibits abundant high‐valence Fe via a charge transfer from Fe to V. The NiFeV nanofiber supported on a carbon cloth shows a low overpotential of 181 mV at 10 mA cm−2, along with long‐term stability (>20 h) at 100 mA cm−2. The reported substitutional growth strategy offers an effective and new pathway for the design of efficient and durable non‐noble metal‐based OER catalysts.
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Affiliation(s)
- Ben Zhang
- Sichuan University, College of Polymer Science and Engineering, 610065, Chengdu, CHINA
| | - Zihe Wu
- Sichuan University, College of Polymer Science and Engineering, CHINA
| | - Wenjie Shao
- Sichuan University, College of Polymer Science and Engineering, 610065, Chengdu, CHINA
| | - Yun Gao
- Sichuan University, College of Biomass Science and Engineering, CHINA
| | - Weiwen Wang
- Sichuan University, College of Polymer Science and Engineering, CHINA
| | - Tian Ma
- Sichuan University, Department of Ultrasound, CHINA
| | - Lang Ma
- Sichuan University, Department of Ultrasound, CHINA
| | - Shuang Li
- Technische Universitat Berlin, Chemistry, Hardenbergstraße 40, 10623,, 10623, Berlin, GERMANY
| | - Chong Cheng
- Sichuan University, College of Polymer Science and Engineering, CHINA
| | - Changsheng Zhao
- Sichuan University, College of Polymer Science and Engineering, CHINA
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Zemskova L, Silant'ev V, Tokar E, Egorin A. Synthesis of Inorganic Compounds in the Matrix of Polysaccharide Chitosan. Biomimetics (Basel) 2021; 6:45. [PMID: 34287224 DOI: 10.3390/biomimetics6030045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Revised: 07/01/2021] [Accepted: 07/02/2021] [Indexed: 11/24/2022] Open
Abstract
Data related to the fabrication of hybrid materials based on the polysaccharide chitosan were systematized and reviewed. The possibility of using chitosan as a “host” matrix for in situ synthesis of inorganic compounds for the preparation of various types of composite materials were investigated. Coprecipitation of metal oxides/hydroxides (Fe, Ni, Al, Zr, Cu and Mn) with chitosan was carried out through the alkalinization of solutions containing metal salts and chitosan, with the addition of ammonia or alkali solutions, homogeneous hydrolysis of urea, or electrophoretic deposition on the cathode. The synthesis of transition metal ferrocyanides and hydroxyapatite was achieved from precursor salts in a chitosan solution with simultaneous alkalinization. The mechanism of composite formation during the coprecipitation process of inorganic compounds with chitosan is discussed. Composite materials are of interest as sorbents, coatings, sensors, and precursors for the production of ceramic and electrode materials.
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Rajendiran R, Chinnadurai D, Chen K, Selvaraj AR, Prabakar K, Li OL. Electrodeposited Trimetallic NiFeW Hydroxide Electrocatalysts for Efficient Water Oxidation. ChemSusChem 2021; 14:1324-1335. [PMID: 33381900 DOI: 10.1002/cssc.202002544] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 12/30/2020] [Indexed: 06/12/2023]
Abstract
Tungsten-doped Ni-Fe hydroxides fabricated on a three-dimensional nickel foam through cathodic electrodeposition are proposed as effective oxygen evolution reaction (OER) catalysts for alkaline water oxidation. Incorporating an adequate amount of W into Ni-Fe hydroxides modulates the electronic structure by changing the local environment of Ni and Fe and create oxygen vacancies, resulting in abundant active sites for the OER. The optimized electrocatalyst, with a substantial number of catalytic sites, is found to outperform the well-established 20 wt% Ir/C electrocatalyst. The catalyst only requires small overpotentials of 224 mV and 251 mV to generate current densities of 10 mA cm-2 and 50 mA cm-2 , respectively, at an extremely low Tafel slope. Surface study after long-term chronopotentiometry (ca. 30 h) reveals that the tungsten dopant undergoes reduction to stabilize the Ni and Fe active sites for predominant water oxidation. This research provides new insight to apply optimum amounts of tungsten doping to enable more significant electronic coupling within Ni-Fe for the chemisorption of hydroxy and oxygen intermediates and greatly improved OER activity.
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Affiliation(s)
- Rajmohan Rajendiran
- Department of Materials Science and Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea
- Materials Technology Institute, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea
| | - Deviprasath Chinnadurai
- Department of Electrical Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea
| | - Kai Chen
- Department of Materials Science and Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea
| | - Aravindha Raja Selvaraj
- Department of Electrical Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea
| | - Kandasamy Prabakar
- Department of Electrical Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea
| | - Oi Lun Li
- Department of Materials Science and Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea
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Nguyen T, Montemor MDF. Metal Oxide and Hydroxide-Based Aqueous Supercapacitors: From Charge Storage Mechanisms and Functional Electrode Engineering to Need-Tailored Devices. Adv Sci (Weinh) 2019; 6:1801797. [PMID: 31065518 PMCID: PMC6498138 DOI: 10.1002/advs.201801797] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 01/09/2019] [Indexed: 05/19/2023]
Abstract
Energy storage devices that efficiently use energy, in particular renewable energy, are being actively pursued. Aqueous redox supercapacitors, which operate in high ionic conductivity and environmentally friendly aqueous electrolytes, storing and releasing high amounts of charge with rapid response rate and long cycling life, are emerging as a solution for energy storage applications. At the core of these devices, electrode materials and their assembling into rational configurations are the main factors governing the charge storage properties of supercapacitors. Redox-active metal compounds, particularly oxides and hydroxides that store charge via reversible valence change redox reactions with electrolyte ions, are prospective candidates to optimize the electrochemical performance of supercapacitors. To address this target, collaborative investigations, addressing different streams, from fundamental charge storage mechanisms and electrode materials engineering to need-tailored device assemblies, are the key. Over the last few years, significant achievements in metal oxide and hydroxide-based aqueous supercapacitors have been reported. This work discusses the most recent achievements and trends in this field and brings into the spotlight the authors' viewpoints.
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Affiliation(s)
- Tuyen Nguyen
- Centro de Química Estrutural (CQE)Departamento de Engenharia Química (DEQ)Instituto Superior TécnicoUniversidade de Lisboa1049‐001LisbonPortugal
| | - Maria de Fátima Montemor
- Centro de Química Estrutural (CQE)Departamento de Engenharia Química (DEQ)Instituto Superior TécnicoUniversidade de Lisboa1049‐001LisbonPortugal
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7
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Qiu Y, Lin C, Li J, Zhang L, Xu L, Zhao Y, Du XX, Wang L, Pan F, Liao F, Sun J. Discovery of Layered Indium Hydroxide via a Hydroperoxyl Anion Coordinated Precursor at Room Temperature. Chemistry 2018; 24:15491-15494. [PMID: 30113745 DOI: 10.1002/chem.201803093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2018] [Indexed: 11/08/2022]
Abstract
All reported layered metal hydroxides have brucite-like metal-hydroxyl host layers, and the discovery of other types of layered metal hydroxides could significantly extend the layered metal hydroxide families, which is meaningful in both theory and applications. Here, through hydroperoxyl anion coordinated In3+ cations as a precursor, a new layered indium hydroxide was synthesized, where only a three-dimensional cubic phase had existed before. The layer of the product exhibits an unusual structure where In(OH)6 octahedra share edges and vertexes with each other to form layers, which is completely different from the common edge-sharing brucite-like metal-hydroxyl layers. By investigating the formation mechanism, the new layered structure is found to be formed by changing the traditional crystallization path through the hydroperoxyl anion coordinated intermediates. Many other new phases could also be discovered by following the same intrinsic principle.
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Affiliation(s)
- Yaming Qiu
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Cong Lin
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China.,College of Chemistry and Chemical Engineering, Chongqing University, NO. 174 Shazheng Street, Shapingba District, Chongqing, 400044, P. R. China
| | - Jian Li
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Lei Zhang
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Le Xu
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Yifang Zhao
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - X Xin Du
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Ligang Wang
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Fengjuan Pan
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Fuhui Liao
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Junliang Sun
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
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8
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Zhu Z, Yin H, He CT, Al-Mamun M, Liu P, Jiang L, Zhao Y, Wang Y, Yang HG, Tang Z, Wang D, Chen XM, Zhao H. Ultrathin Transition Metal Dichalcogenide/3d Metal Hydroxide Hybridized Nanosheets to Enhance Hydrogen Evolution Activity. Adv Mater 2018; 30:e1801171. [PMID: 29782677 DOI: 10.1002/adma.201801171] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 04/08/2018] [Indexed: 05/24/2023]
Abstract
The vast majority of the reported hydrogen evolution reaction (HER) electrocatalysts perform poorly under alkaline conditions due to the sluggish water dissociation kinetics. Herein, a hybridization catalyst construction concept is presented to dramatically enhance the alkaline HER activities of catalysts based on 2D transition metal dichalcogenides (TMDs) (MoS2 and WS2 ). A series of ultrathin 2D-hybrids are synthesized via facile controllable growth of 3d metal (Ni, Co, Fe, Mn) hydroxides on the monolayer 2D-TMD nanosheets. The resultant Ni(OH)2 and Co(OH)2 hybridized ultrathin MoS2 and WS2 nanosheet catalysts exhibit significantly enhanced alkaline HER activity and stability compared to their bare counterparts. The 2D-MoS2 /Co(OH)2 hybrid achieves an extremely low overpotential of ≈128 mV at 10 mA cm-2 in 1 m KOH. The combined theoretical and experimental studies confirm that the formation of the heterostructured boundaries by suitable hybridization of the TMD and 3d metal hydroxides is responsible for the improved alkaline HER activities because of the enhanced water dissociation step and lowers the corresponding kinetic energy barrier by the hybridized 3d metal hydroxides.
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Affiliation(s)
- Zhengju Zhu
- Centre for Clean Environment and Energy, Griffith University, Queensland, 4222, Australia
| | - Huajie Yin
- Centre for Clean Environment and Energy, Griffith University, Queensland, 4222, Australia
| | - Chun-Ting He
- Centre for Clean Environment and Energy, Griffith University, Queensland, 4222, Australia
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China
| | - Mohammad Al-Mamun
- Centre for Clean Environment and Energy, Griffith University, Queensland, 4222, Australia
| | - Porun Liu
- Centre for Clean Environment and Energy, Griffith University, Queensland, 4222, Australia
| | - Lixue Jiang
- Centre for Clean Environment and Energy, Griffith University, Queensland, 4222, Australia
| | - Yong Zhao
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM Innovation Campus, University of Wollongong, North Wollongong, NSW, 2522, Australia
| | - Yun Wang
- Centre for Clean Environment and Energy, Griffith University, Queensland, 4222, Australia
| | - Hua-Gui Yang
- Centre for Clean Environment and Energy, Griffith University, Queensland, 4222, Australia
| | - Zhiyong Tang
- Centre for Clean Environment and Energy, Griffith University, Queensland, 4222, Australia
| | - Dan Wang
- Centre for Clean Environment and Energy, Griffith University, Queensland, 4222, Australia
| | - Xiao-Ming Chen
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China
| | - Huijun Zhao
- Centre for Clean Environment and Energy, Griffith University, Queensland, 4222, Australia
- Centre for Environmental and Energy Nanomaterials, CAS Centre for Excellence in Nanoscience, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, China
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Wu X, Zhao Y, Xing T, Zhang P, Li F, Lee H, Li F, Sun L. Hierarchically Structured FeNiO x H y Electrocatalyst Formed by In Situ Transformation of Metal Phosphate for Efficient Oxygen Evolution Reaction. ChemSusChem 2018; 11:1761-1767. [PMID: 29660805 DOI: 10.1002/cssc.201800407] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 04/11/2018] [Indexed: 05/26/2023]
Abstract
A simple and low-cost fabrication method is needed to obtain effective and robust heterogeneous catalysts for the oxygen evolution reaction (OER). In this study, an electrocatalyst FeNiOx Hy with a hierarchical structure is synthesized on nickel foam by a simple fabrication method through anion exchange from a metal phosphate to a metal hydroxide. The as-fabricated FeNiOx Hy electrode requires overpotentials of 206 and 234 mV to deliver current densities of 10 and 50 mA cm-2 , respectively. The catalytic performance of FeNiOx Hy is superior to that of most previously reported FeNi-based catalysts, including NiFe layered double hydroxide. The catalyst also shows good long-term durability at a current density of 50 mA cm-2 over 50 h with no activity decay under 1 m KOH. By comparison to the directly electrodeposited FeNi hydroxide in morphology and electrochemical properties, the improved activity of the catalyst could be mainly attributed to an enhancement of its intrinsic activity, which was caused by the anion exchange of phosphate to (oxy)hydroxide. Further studies by cyclic voltammetry indicated a stronger interaction between Ni and Fe from the negative shift of the oxidation peak of Ni2+ /Ni3+ in comparison with reported FeNiOx Hy , which promoted the generation of active Ni3+ species more easily. This work may provide a new approach to the simple preparation of effective and robust OER catalysts by anion exchange.
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Affiliation(s)
- Xiujuan Wu
- State Key Laboratory of Fine Chemicals, DUT-KTH Joint Education and Research Center on Molecular Devices, Dalian University of Technology (DUT), Dalian, 116024, PR China
| | - Yimeng Zhao
- State Key Laboratory of Fine Chemicals, DUT-KTH Joint Education and Research Center on Molecular Devices, Dalian University of Technology (DUT), Dalian, 116024, PR China
| | - Tongyu Xing
- State Key Laboratory of Fine Chemicals, DUT-KTH Joint Education and Research Center on Molecular Devices, Dalian University of Technology (DUT), Dalian, 116024, PR China
| | - Peili Zhang
- State Key Laboratory of Fine Chemicals, DUT-KTH Joint Education and Research Center on Molecular Devices, Dalian University of Technology (DUT), Dalian, 116024, PR China
| | - Fusheng Li
- State Key Laboratory of Fine Chemicals, DUT-KTH Joint Education and Research Center on Molecular Devices, Dalian University of Technology (DUT), Dalian, 116024, PR China
| | - Husileng Lee
- State Key Laboratory of Fine Chemicals, DUT-KTH Joint Education and Research Center on Molecular Devices, Dalian University of Technology (DUT), Dalian, 116024, PR China
| | - Fei Li
- State Key Laboratory of Fine Chemicals, DUT-KTH Joint Education and Research Center on Molecular Devices, Dalian University of Technology (DUT), Dalian, 116024, PR China
| | - Licheng Sun
- State Key Laboratory of Fine Chemicals, DUT-KTH Joint Education and Research Center on Molecular Devices, Dalian University of Technology (DUT), Dalian, 116024, PR China
- Department of Chemistry, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Stockholm, 10044, Sweden
- Institute for Energy Science and Technology, Dalian University of Technology (DUT), Dalian, 116024, PR China
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Grote F, Yu ZY, Wang JL, Yu SH, Lei Y. Self-Stacked Reduced Graphene Oxide Nanosheets Coated with Cobalt-Nickel Hydroxide by One-Step Electrochemical Deposition toward Flexible Electrochromic Supercapacitors. Small 2015; 11:4666-4672. [PMID: 26150383 DOI: 10.1002/smll.201501037] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 06/02/2015] [Indexed: 06/04/2023]
Abstract
The implementation of an optical function into supercapacitors is an innovative approach to make energy storage devices smarter and to meet the requirements of smart electronics. Here, it is reported for the first time that nickel-cobalt hydroxide on reduced graphene oxide can be utilized for flexible electrochromic supercapacitors. A new and straightforward one-step electrochemical deposition process is introduced that is capable of simultaneously reducing GO and depositing amorphous Co(1-x)Ni(x)(OH)2 on the rGO. It is shown that the rGO nanosheets are homogeneously coated with metal hydroxide and are vertically stacked. No high temperature processes are used so that flexible polymer-based substrates can be coated. The synthesized self-stacked rGO-Co(1-x)Ni(x)(OH)2 nanosheet material exhibits pseudocapacitive charge storage behavior with excellent rate capability, high Columbic efficiency, and nondiffusion limited behavior. It is shown that the electrochemical behavior of the Ni(OH)2 can be modulated, by simultaneously depositing nickel and cobalt hydroxide, into broad oxidization and reduction bands. Further, the material exhibits electrochromic property and can switch between a bleached and transparent state. Literature comparison reveals that the performance characteristics of the rGO-Co(1-x)Ni(x)(OH)2 nanosheet material, in terms of gravimetric capacitance, areal capacitance, and long-term cycling stability, are among the highest reported values of supercapacitors with electrochromic property.
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Affiliation(s)
- Fabian Grote
- Ilmenau University of Technology, Institute of Physics and IMN MacroNano®(ZIK), Prof. Schmidt Str. 26, 98693, Ilmenau, Germany
| | - Zi-You Yu
- Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Collaborative Innovation Center of Suzhou Nano, Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Jin-Long Wang
- Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Collaborative Innovation Center of Suzhou Nano, Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Shu-Hong Yu
- Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Collaborative Innovation Center of Suzhou Nano, Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Yong Lei
- Ilmenau University of Technology, Institute of Physics and IMN MacroNano®(ZIK), Prof. Schmidt Str. 26, 98693, Ilmenau, Germany
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11
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Zhao W, Zhang C, Geng F, Zhuo S, Zhang B. Nanoporous hollow transition metal chalcogenide nanosheets synthesized via the anion-exchange reaction of metal hydroxides with chalcogenide ions. ACS Nano 2014; 8:10909-19. [PMID: 25283816 DOI: 10.1021/nn504755x] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Nanoporous hollow transition metal chalcogenides are of special interest for a variety of promising applications. Although some advanced synthetic methods have been reported, the development of a facile and general strategy to fabricate porous hollow nanostructures of transition metal chalcogenides, especially with enhanced electrocatalytic performance, still remains highly challenged. Herein, we report a facile chemical transformation strategy to prepare nanoporous hollow Co3S4 nanosheets via the anion exchange reaction of Co(OH)2 with sulfide ions. The chemical transformation mechanism involves the as-formed layer of nanoporous cobalt sulfide on Co(OH)2 driven by the anion-exchange-reaction and lattice mismatch induced quick strain release, a following diffusion-effect-dominated core-shell hollow intermediate with hollow interiors, and subsequent Ostwald ripening growth of hollow nanosheets at elevated temperatures. This anion-exchange strategy of transition metal hydroxides with chalcogenide ions is also suitable for fabricating nanoporous hollow nanosheets of other metal chalcogenides (e.g., CoSe2, CoTe2, CdS, and NiS). The as-prepared nanoporous hollow Co3S4 nanosheets are found to be highly active and stable for electrocatalytic oxygen evolution reaction.
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Affiliation(s)
- Weiwei Zhao
- Department of Chemistry, School of Science, Tianjin University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300072, China
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