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Ren H, Yang F, Cao M, Shan B, Chen R. Seamless integration of a nickel-based metal-organic framework with three-dimensional substrates for nonenzymatic glucose sensing. Dalton Trans 2024; 53:6300-6310. [PMID: 38482906 DOI: 10.1039/d4dt00335g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
The effective integration of nanomaterials with underlying current collectors is a key factor affecting the performance of nonenzymatic glucose sensors, where an inappropriate integration structure often leads to poor electron transport and instability. In this work, a seamless integrated electrode was constructed by the in situ immobilizing of a nickel-based metal-organic framework (Ni-MOF) on a three-dimensional (3D) conductive nickel foam (NF) for highly sensitive and durable glucose sensing. Facilitated by a rapid microwave-assisted reaction, a robust interfacial interaction between the Ni-MOF and the substrate was established through in situ conversion from nickel oxide (NiO). The fabricated Ni-MOF/NF electrode exhibits an excellent limit of detection (LOD) of 2.65 μM and an impressive sensitivity (14.31 mA cm-2 mM-1) within the linear range (4-576 μM), which is significantly boosted compared with that of an electrode prepared by a typical drop-casting method (3.56 mA cm-2 mM-1 in 4-1836 μM). Characterization and electrochemical tests reveal that this integrated structure on the one hand contributes to fast electron transport and thus has enhanced sensitivity and on the other hand leads to exceptional durability with its structural integrity maintained under bending, shaking, and ultrasonication. Moreover, this seamless integration method was also employed to immobilize the Ni-MOF converted from the pre-chemically deposited NiO layer on another type of substrate, 3D carbon paper (CP), demonstrating the versatility of this facile strategy in creating diverse electrochemical electrodes for applications beyond glucose sensing.
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Affiliation(s)
- Haonan Ren
- State Key Laboratory of Intelligent Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China.
| | - Fan Yang
- State Key Laboratory of Intelligent Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China.
| | - Meng Cao
- State Key Laboratory of Intelligent Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China.
| | - Bin Shan
- State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - Rong Chen
- State Key Laboratory of Intelligent Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China.
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2
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Abdpour S, Fetzer MNA, Oestreich R, Beglau THY, Boldog I, Janiak C. Bimetallic CPM-37(Ni,Fe) metal-organic framework: enhanced porosity, stability and tunable composition. Dalton Trans 2024; 53:4937-4951. [PMID: 38270136 DOI: 10.1039/d3dt03695b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2024]
Abstract
A newly synthesized series of bimetallic CPM-37(Ni,Fe) metal-organic frameworks with different iron content (Ni/Fe ≈ 2, 1, 0.5, named CPM-37(Ni2Fe), CPM-37(NiFe) and CPM-37(NiFe2)) demonstrated high N2-based specific SBET surface areas of 2039, 1955, and 2378 m2 g-1 for CPM-37(Ni2Fe), CPM-37(NiFe), and CPM-37(NiFe2), having much higher values compared to the monometallic CPM-37(Ni) and CPM-37(Fe) with 87 and 368 m2 g-1 only. It is rationalized that the mixed-metal nature of the materials increases the structural robustness due to the better charge balance at the coordination bonded cluster, which opens interesting application-oriented possibilities for mixed-metal CPM-37 and other less-stable MOFs. In this work, the CPM-37-derived α,β-Ni(OH)2, γ-NiO(OH), and, plausibly, γ-FeO(OH) phases obtained via decomposition in the alkaline medium demonstrated a potent electrocatalytic activity in the oxygen evolution reaction (OER). The ratio Ni : Fe ≈ 2 from CPM-37(Ni2Fe) showed the best OER activity with a small overpotential of 290 mV at 50 mA cm-2, low Tafel slope of 39 mV dec-1, and more stable OER performance compared to RuO2 after 20 h chronopotentiometry at 50 mA cm-2.
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Affiliation(s)
- Soheil Abdpour
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, 40204 Düsseldorf, Germany.
| | - Marcus N A Fetzer
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, 40204 Düsseldorf, Germany.
| | - Robert Oestreich
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, 40204 Düsseldorf, Germany.
| | - Thi Hai Yen Beglau
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, 40204 Düsseldorf, Germany.
| | - István Boldog
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, 40204 Düsseldorf, Germany.
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, 40204 Düsseldorf, Germany.
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3
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Liu W, Ni C, Gao M, Zhao X, Zhang W, Li R, Zhou K. Metal-Organic-Framework-Based Nanoarrays for Oxygen Evolution Electrocatalysis. ACS NANO 2023; 17:24564-24592. [PMID: 38048137 DOI: 10.1021/acsnano.3c09261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2023]
Abstract
The development of highly active and stable electrode materials for the oxygen evolution reaction (OER) is essential for the widespread application of electrochemical energy conversion systems. In recent years, various metal-organic frameworks (MOFs) with self-supporting array structures have been extensively studied because of their high porosity, abundant metal sites, and flexible and adjustable structures. This review provides an overview of the recent progress in the design, preparation, and applications of MOF-based nanoarrays for the OER, beginning with the introduction of the architectural advantages of the nanoarrays and the characteristics of MOFs. Subsequently, the design principles of robust and efficient MOF-based nanoarrays as OER electrodes are highlighted. Furthermore, detailed discussions focus on the composition, structure, and performance of pristine MOF nanoarrays (MOFNAs) and MOF-based composite nanoarrays. On the one hand, the effects of the two components of MOFs and several modification methods are discussed in detail for MOFNAs. On the other hand, the review emphasizes the use of MOF-based composite nanoarrays composed of MOFs and other nanomaterials, such as oxides, hydroxides, oxyhydroxides, chalcogenides, MOFs, and metal nanoparticles, to guide the rational design of efficient OER electrodes. Finally, perspectives on current challenges, opportunities, and future directions in this research field are provided.
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Affiliation(s)
| | | | - Ming Gao
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | | | | | | | - Kun Zhou
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798, Singapore
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4
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Hu N, Hang F, Li K, Liao T, Rackemann D, Zhang Z, Shi C, Xie C. Temperature-regulated formation of hierarchical pores and defective sites in MIL-121 for enhanced adsorption of cationic and anionic dyes. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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5
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Ramadan A, Adam Hamouda H, Zhu X, Ding J, Pei H, Liu N, Guo R, Mo Z. Fabrication of Co2Mn3O8@NiMnLDH nanocomposite Array on Nickel Foam for Oxygen Evaluation Reaction. INORG CHEM COMMUN 2023. [DOI: 10.1016/j.inoche.2023.110670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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6
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Alburaih HA, Manzoor S, Abdullah M, Ashiq MN, Aman S, Trukhanov SV, Zubar TI, Sun Z, Taha TA, Trukhanov AV. Electro-oxidation reconstitution of aluminium copper MOF-derived metal oxyhydroxides for a robust OER process. RSC Adv 2023; 13:8736-8742. [PMID: 36936821 PMCID: PMC10015629 DOI: 10.1039/d2ra07661f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 01/30/2023] [Indexed: 03/17/2023] Open
Abstract
It is common knowledge that the O2 evolution reaction (OER) is a crucial half-reaction in the electrolysis of water. However, it is currently difficult to create inexpensive OER electrode materials in a way that is efficient, simple, and environmentally friendly. In this research, metal oxy-hydroxides with numerous oxygen defects (M-OOHv) are created at surface of Cu foam (CF) using a unique, straightforward electro-oxidation reconstitution (ER) process. Different spectroscopic and microscopy methods are used to analyse the electrode characteristics of Al2Cu-MOF@M-OOHv-ER/CF; electrochemical measurements display a lower overpotential (η) of 366 mV @ 10 mA cm-2 and a Tafel slope of 95.2 mV dec-1 in 1.0 M KOH. X-Ray diffraction (XRD), scanning electron microscopy (SEM), and Raman studies confirm the phase transition of the metal-organic framework (MOF) to the M-OOH, which acts as the active site to boost the OER activity. Through spectroscopic and microscopic investigations, it is determined that the efficiency of bimetallic electrode materials and oxygen vacancies in the M-OOHv have an impact on the electron power density. The manufactured electrode material additionally showed good durability for 50 hours. As a result, the newly developed Al2Cu-MOF@M-OOHv-ER/CF nanomaterial has greater potential for both electrolysis of water and other energy storage equipment.
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Affiliation(s)
- H A Alburaih
- Department of Physics, College of Science, Princess Nourah bint Abdulrahman University P.O. Box 84428 Riyadh 11671 Saudi Arabia
| | - Sumaira Manzoor
- Institute of Chemical Sciences, Bahauddin Zakariya University Multan 60800 Pakistan
| | - M Abdullah
- Department of Chemistry, Government College University Lahore Pakistan
| | - M N Ashiq
- Institute of Chemical Sciences, Bahauddin Zakariya University Multan 60800 Pakistan
| | - Salma Aman
- Institute of Chemical Sciences, Bahauddin Zakariya University Multan 60800 Pakistan
| | - Sergei V Trukhanov
- Smart Sensors Laboratory, Department of Electronic Materials Technology, National University of Science and Technology MISiS Moscow 119049 Russia
- Scientific-Practical Materials Research Centre of National Academy of Sciences of Belarus Minsk 220072 Belarus
| | - Tatiana I Zubar
- Scientific-Practical Materials Research Centre of National Academy of Sciences of Belarus Minsk 220072 Belarus
| | - Zhipeng Sun
- School of Materials and Energy, Guangdong University of Technology, Guangzhou Higher Education Mega Center No.100 Waihuan Xi Road, Panyu District Guangzhou 510006 P. R. China
| | - T A Taha
- Physics Department, College of Science, Jouf University P.O. Box 2014 Sakaka Saudi Arabia
- Physics and Engineering Mathematics Department, Faculty of Electronic Engineering, Menoufia University Menouf 32952 Egypt
| | - Alex V Trukhanov
- Smart Sensors Laboratory, Department of Electronic Materials Technology, National University of Science and Technology MISiS Moscow 119049 Russia
- Scientific-Practical Materials Research Centre of National Academy of Sciences of Belarus Minsk 220072 Belarus
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Adegoke KA, Adegoke OR, Adigun RA, Maxakato NW, Bello OS. Two-dimensional metal-organic frameworks: From synthesis to biomedical, environmental, and energy conversion applications. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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8
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Tan Y, Lin C, He X, Zou J, Yan C, Tian J. Introducing a Synergistic Ligand Containing an Exotic Metal in Metal-Organic Framework Nanoarrays Enabling Superior Electrocatalytic Water Oxidation Performance. Inorg Chem 2022; 61:11432-11441. [PMID: 35834636 DOI: 10.1021/acs.inorgchem.2c01756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Designing and fabricating well-aligned metal-organic framework nanoarrays (MOF NAs) with high electrocatalytic activity and durability for water oxidation at large current density remain huge challenges. Here the vertical NiFc-MOF NAs constructed from agaric-like nanosheets were fabricated by introducing a ligand containing an exotic Fe atom to coordinate with Ni ion using Ni(OH)2 NAs as a self-sacrificing template. The NiFc-MOF NAs exhibited superior water oxidation performance with a very low overpotential of 161 mV at the current density of 10 mA cm-2. Chronoamperometry was tested at an overpotential of 250 mV, which delivered an initial industrial-grade current density of 702 mA cm-2 and still remained at 694 mA cm-2 after 24 h. Furthermore, it possessed fast reaction kinetics with a small Tafel slope of 29.5 mV dec-1. The superior electrocatalytic performance can be ascribed to the structural advantage of vertically grown agaric-like NAs and the synergistic electron coupling between Ni and Fe atoms, namely, electron transfer from Ni to Fe atoms in NiFc-MOF NAs. The exposed density and valence state of active Ni sites were synchronously increased. Furthermore, the energy barrier for the adsorption/desorption of oxygenated intermediates was ultimately optimized for water oxidation. This work provides a novelty orientation to accelerate electrocatalytic performance of MOF NAs by introducing self-sacrificing templates containing one metal and synergistic ligand containing dissimilar metal.
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Affiliation(s)
- Ye Tan
- Jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices, School of Chemistry, Biology and Materials Science, East China University of Technology, Nanchang 330013, P. R. China
| | - Chong Lin
- Jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices, School of Chemistry, Biology and Materials Science, East China University of Technology, Nanchang 330013, P. R. China
| | - Xiao He
- Jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices, School of Chemistry, Biology and Materials Science, East China University of Technology, Nanchang 330013, P. R. China
| | - Junjie Zou
- Jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices, School of Chemistry, Biology and Materials Science, East China University of Technology, Nanchang 330013, P. R. China
| | - Chunpei Yan
- Jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices, School of Chemistry, Biology and Materials Science, East China University of Technology, Nanchang 330013, P. R. China
| | - Jingyang Tian
- Jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices, School of Chemistry, Biology and Materials Science, East China University of Technology, Nanchang 330013, P. R. China
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9
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Preparation of NiFeCr-based trimetal organic frameworks as electrocatalyst for direct use in oxygen evolution reaction. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128469] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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10
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Wang J, Jiang Y, Liu C, Wu Y, Liu B, Jiang W, Li H, Che G. In situ growth of hierarchical bimetal-organic frameworks on nickel-iron foam as robust electrodes for the electrocatalytic oxygen evolution reaction. J Colloid Interface Sci 2022; 614:532-537. [PMID: 35121511 DOI: 10.1016/j.jcis.2022.01.140] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 01/21/2022] [Accepted: 01/22/2022] [Indexed: 12/20/2022]
Abstract
Evidence shows that self-supported electrocatalysts are crucial role to solving environmental and energy issues. In this study, self-supported 2D metal-organic framework (MOF) nanosheets grown in situ on nickel-iron foam (NFF) were prepared by a one-step solvothermal process. The hierarchical nanostructure possesses a high specific surface area and abundant metal sites, which are beneficial for electrocatalytic reactions. In the electrocatalytic oxygen evolution reaction (OER), the optimal NiFe(20Ni)-MOF/NFF can drive current densities of 10, 50 and 100 mA cm-2 at small overpotentials of 226, 277 and 294 mV, respectively. According to the characterization results, the OER performance is improved by the synergistic action of bimetals and the generation of hydroxides/oxyhydroxides. This work provides new insights into fabricating self-supported MOF-based electrodes for water splitting that are simple and highly efficient.
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Affiliation(s)
- Jia Wang
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun 130103, PR China
| | - Yu Jiang
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun 130103, PR China
| | - Chunbo Liu
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun 130103, PR China; College of Environmental Science and Engineering, Jilin Normal University, Siping, 136000, PR China.
| | - Yuanyuan Wu
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun 130103, PR China
| | - Bo Liu
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun 130103, PR China
| | - Wei Jiang
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun 130103, PR China; College of Environmental Science and Engineering, Jilin Normal University, Siping, 136000, PR China.
| | - Hongji Li
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun 130103, PR China; College of Environmental Science and Engineering, Jilin Normal University, Siping, 136000, PR China
| | - Guangbo Che
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun 130103, PR China
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Jia Y, Xu Z, Li L, Lin SY. Formation of NiFe-MOF nanosheets on Fe foam to achieve advanced electrocatalytic oxygen evolution. Dalton Trans 2022; 51:5053-5060. [DOI: 10.1039/d2dt00127f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
2D bimetal metal organic frameworks (MOFs) are recognized as one of the most promising electrocatalysts for oxygen evolution reaction (OER). Herein, a facile approach was proposed to construct NiFe-MOF nanosheets...
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12
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Gao Y, Bai J, Zhou T, Gong Y. Ir-doped Co(OH)2 Nanosheets as Efficient Electrocatalyst for Oxygen Evolution Reaction. Dalton Trans 2022; 51:8832-8839. [DOI: 10.1039/d2dt01366e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In recent years, Co-based metal-organic frameworks (Co-MOFs) have received significant research interest because of their large specific surface area, high porosity, tunable structure and topological flexibility. However, the comparatively weak...
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Zhou Y, Abazari R, Chen J, Tahir M, Kumar A, Ikreedeegh RR, Rani E, Singh H, Kirillov AM. Bimetallic metal–organic frameworks and MOF-derived composites: Recent progress on electro- and photoelectrocatalytic applications. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2021.214264] [Citation(s) in RCA: 66] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Ye L, Zhang Y, Zhang M, Gong Y. An ingeniously assembled metal-organic framework on the surface of FeMn co-doped Ni(OH) 2 as a high-efficiency electrocatalyst for the oxygen evolution reaction. Dalton Trans 2021; 50:11775-11782. [PMID: 34351336 DOI: 10.1039/d1dt02127c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
To overcome the problem of the sluggish kinetics of the oxygen evolution reaction (OER), it is of great significance to develop an efficient and stable non-noble metal-based OER catalyst for electrocatalytic energy conversion and storage. Herein, a complex of a metal-organic framework and hydroxide is synthesized by performing a ligand etching strategy on FeMn co-doped Ni(OH)2 nanosheets in situ grown on nickel foam (FeMn-Ni(OH)2@MOF/NF). Benefiting from the unique sheet-on-sheet hierarchical structure, multi-metal active nodes and two active materials grown in situ, the resulting FeMn-Ni(OH)2@MOF/NF demonstrated brilliant OER activity with an overpotential of 199 mV to achieve a current density of 10 mA cm-2 and long-term stability. This research will provide a new strategy for the design of high-performance OER electrocatalysts.
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Affiliation(s)
- Lei Ye
- School of Chemical Engineering and Technology, North University of China, Taiyuan, Shanxi 030051, China.
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Ye L, Zhang Y, Wang L, Zhao L, Gong Y. Assembly of ZIF-67 nanoparticles and in situ grown Cu(OH) 2 nanowires serves as an effective electrocatalyst for oxygen evolution. Dalton Trans 2021; 50:7256-7264. [PMID: 33960361 DOI: 10.1039/d1dt01025e] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Due to the slow kinetics of oxygen evolution at the anode, the efficiency of electrocatalytic water decomposition is critically reduced, and its large-scale application is severely restricted. Therefore, it is urgent to develop electrocatalysts with excellent performance and stability to accelerate the oxygen evolution reaction (OER) reaction kinetics. Herein, a self-supporting binder-free electrocatalyst was successfully prepared using in situ grown Cu(OH)2 nanowires on CF as the carrier to grow ZIF-67 via a room temperature immersion method. The combination of Cu(OH)2 nanowires and the unique structure of ZIF-67 forms a three-dimensional nanostructured catalyst, in which the unique structure and the existence of synergy may contribute to a larger electrochemical active surface area, expose more electrochemically active sites, adjust the electronic structure, and accelerate the rate of electron transfer, thus greatly improving the electrocatalytic activity and durability for OER. The as-prepared Cu(OH)2@ZIF-67/CF exhibited excellent OER performance under alkaline conditions and required overpotentials of 205 mV and 276 mV to drive current densities of 10 mA cm-2 and 100 mA cm-2, respectively, with a small Tafel slope of 70.5 mV dec-1 for OER. The stability test of Cu(OH)2@ZIF-67/CF at the current density of 10 mA cm-2 displayed excellent stability for 22 h. This study provides a feasible strategy for the rapid preparation of low-cost and efficient electrocatalysts in alkaline media.
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Affiliation(s)
- Lei Ye
- School of Chemical Engineering and Technology, North University of China, Taiyuan, Shanxi 030051, China
| | - Yeqing Zhang
- School of Chemical Engineering and Technology, North University of China, Taiyuan, Shanxi 030051, China
| | - Limin Wang
- School of Chemical Engineering and Technology, North University of China, Taiyuan, Shanxi 030051, China
| | - LinXiu Zhao
- School of Chemical Engineering and Technology, North University of China, Taiyuan, Shanxi 030051, China
| | - Yaqiong Gong
- School of Chemical Engineering and Technology, North University of China, Taiyuan, Shanxi 030051, China and State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen, Fujian 361005, China.
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