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Guo D, Xu J, Liu G, Yu X. Core-Shell CoS 2@MoS 2 with Hollow Heterostructure as an Efficient Electrocatalyst for Boosting Oxygen Evolution Reaction. Molecules 2024; 29:1695. [PMID: 38675517 PMCID: PMC11051863 DOI: 10.3390/molecules29081695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 04/04/2024] [Accepted: 04/06/2024] [Indexed: 04/28/2024] Open
Abstract
It is imperative to develop an efficient catalyst to reduce the energy barrier of electrochemical water decomposition. In this study, a well-designed electrocatalyst featuring a core-shell structure was synthesized with cobalt sulfides as the core and molybdenum disulfide nanosheets as the shell. The core-shell structure can prevent the agglomeration of MoS2, expose more active sites, and facilitate electrolyte ion diffusion. A CoS2/MoS2 heterostructure is formed between CoS2 and MoS2 through the chemical interaction, and the surface chemistry is adjusted. Due to the morphological merits and the formation of the CoS2/MoS2 heterostructure, CoS2@MoS2 exhibits excellent electrocatalytic performance during the oxygen evolution reaction (OER) process in an alkaline electrolyte. To reach the current density of 10 mA cm-2, only 254 mV of overpotential is required for CoS2@MoS2, which is smaller than that of pristine CoS2 and MoS2. Meanwhile, the small Tafel slope (86.9 mV dec-1) and low charge transfer resistance (47 Ω) imply the fast dynamic mechanism of CoS2@MoS2. As further confirmed by cyclic voltammetry curves for 1000 cycles and the CA test for 10 h, CoS2@MoS2 shows exceptional catalytic stability. This work gives a guideline for constructing the core-shell heterostructure as an efficient catalyst for oxygen evolution reaction.
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Affiliation(s)
- Donglei Guo
- Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471934, China; (D.G.); (J.X.); (G.L.)
| | - Jiaqi Xu
- Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471934, China; (D.G.); (J.X.); (G.L.)
| | - Guilong Liu
- Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471934, China; (D.G.); (J.X.); (G.L.)
| | - Xu Yu
- Institute of Innovation Materials and Energy, School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
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Jiang B, Chen Z, Zhao H, Xiao H, Wang T, Zhou L, Wu X, Wang X, Pang T, Wang Z, Wang J, Wu K. Interfacial π-p Electron Coupling Prompts Hydrogen Evolution Reaction Activity in Acidic Electrolyte. Inorg Chem 2024; 63:3992-3999. [PMID: 38359906 DOI: 10.1021/acs.inorgchem.4c00066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
The thermodynamically stable 2H-phase MoS2 is a brilliant material toward hydrogen evolution reaction (HER) owing to its excellent Gibbs free energy of hydrogen adsorption. Nevertheless, the poor intrinsic properties of 2H-MoS2 limit its electrocatalytic performances toward HER. In this work, graphitic carbon nitride covalently bridging 2H-MoS2 (MoS2/GCN) is proposed to construct robust HER electrocatalysts. The strong π-p electron coupling between the delocalized π electrons of GCN and the localized p electrons of S atoms sufficiently expose active sites and accelerate the reaction kinetics. To be specific, MoS2/GCN exhibits remarkable HER activity (160 mV at 10 mA·cm-2) and long-term durability. Importantly, MoS2/GCN also provides great potential for industrial application. Density functional theory (DFT) calculations disclose that the π-p electron coupling at the MoS2/GCN interface regulates the electronic structure of S atoms, consequently providing enhanced HER performance. This work presents a feasible pathway to develop advanced electrocatalysts for energy conversions.
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Affiliation(s)
- Binbin Jiang
- Anhui Provincial Key Laboratory of Functional Coordination Compounds and Nanomaterials, School of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246001, P. R. China
| | - Zhiqiang Chen
- Beijing Key Laboratory of Research and Application for Aerospace Green Propellants, Beijing Institute of Aerospace Testing Technology, Beijing 100074, China
- Aerospace Liquid Propellant Research Center, Beijing Institute of Aerospace Testing Technology, Beijing 100074, China
| | - Hui Zhao
- Anhui Provincial Key Laboratory of Functional Coordination Compounds and Nanomaterials, School of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246001, P. R. China
| | - Han Xiao
- Anhui Provincial Key Laboratory of Functional Coordination Compounds and Nanomaterials, School of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246001, P. R. China
| | - Tao Wang
- Anhui Provincial Key Laboratory of Functional Coordination Compounds and Nanomaterials, School of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246001, P. R. China
| | - Le Zhou
- Anhui Provincial Key Laboratory of Functional Coordination Compounds and Nanomaterials, School of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246001, P. R. China
| | - Xia Wu
- Anhui Provincial Key Laboratory of Functional Coordination Compounds and Nanomaterials, School of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246001, P. R. China
| | - Xie Wang
- Anhui Provincial Key Laboratory of Functional Coordination Compounds and Nanomaterials, School of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246001, P. R. China
| | - Tao Pang
- Anhui Provincial Key Laboratory of Functional Coordination Compounds and Nanomaterials, School of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246001, P. R. China
| | - Zhuqing Wang
- Anhui Provincial Key Laboratory of Functional Coordination Compounds and Nanomaterials, School of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246001, P. R. China
| | - Junwei Wang
- Anhui Provincial Key Laboratory of Functional Coordination Compounds and Nanomaterials, School of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246001, P. R. China
| | - Konglin Wu
- Institute of Clean Energy and Advanced Nanocatalysis (iClean), School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243032, China
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Shi Y, Zhang Y, Song G, Sun Y, Ding G. Efficient removal of organic pollutants by activation of peroxydisulfate with the magnetic CoFe 2O 4/carbon nanotube composite. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:6835-6846. [PMID: 38153579 DOI: 10.1007/s11356-023-31567-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Accepted: 12/11/2023] [Indexed: 12/29/2023]
Abstract
A magnetic composite of CoFe2O4 and carbon nanotube (CNT) was prepared using the solvothermal approach and then employed for the activation of peroxydisulfate (PDS) to degrade reactive black 5 (RB5) and other organic pollutants. Characterization results of the composite catalyst revealed the successful loading of spherical CoFe2O4 particles on CNTs, possessing abundant porosity as well as magnetic separation capability. Under the degradation conditions of 0.2 g/L CoFe2O4-CNT dosage and 4 mM PDS dosage, the removal efficiencies of 10 mg/L RB5 and other pollutants were in the range of 94.5 to ~ 100%. The effects of pH, co-existing ions/humic acid, and water matrices as well as the reusability of the catalyst were also investigated in detail. Furthermore, the degradation mechanism and pathway were proposed based on quenching experiments, LC-MS analysis, and density functional theory (DFT) calculations, and the toxicity of the degradation products was evaluated in the quantitative structure-activity relationship approach.
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Affiliation(s)
- Yawei Shi
- College of Environmental Science and Engineering, Dalian Maritime University, Dalian, 116026, China
| | - Yi Zhang
- College of Environmental Science and Engineering, Dalian Maritime University, Dalian, 116026, China
| | - Guobin Song
- College of Environmental Science and Engineering, Dalian Maritime University, Dalian, 116026, China
| | - Ya Sun
- College of Environmental Science and Engineering, Dalian Maritime University, Dalian, 116026, China
| | - Guanghui Ding
- College of Environmental Science and Engineering, Dalian Maritime University, Dalian, 116026, China.
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Zhang Y, Nie K, Yi L, Li B, Yuan Y, Liu Z, Huang W. Recent Advances in Engineering of 2D Materials-Based Heterostructures for Electrochemical Energy Conversion. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2302301. [PMID: 37743245 PMCID: PMC10625098 DOI: 10.1002/advs.202302301] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 08/11/2023] [Indexed: 09/26/2023]
Abstract
2D materials, such as graphene, transition metal dichalcogenides, black phosphorus, layered double hydroxides, and MXene, have exhibited broad application prospects in electrochemical energy conversion due to their unique structures and electronic properties. Recently, the engineering of heterostructures based on 2D materials, including 2D/0D, 2D/1D, 2D/2D, and 2D/3D, has shown the potential to produce synergistic and heterointerface effects, overcoming the inherent restrictions of 2D materials and thus elevating the electrocatalytic performance to the next level. In this review, recent studies are systematically summarized on heterostructures based on 2D materials for advanced electrochemical energy conversion, including water splitting, CO2 reduction reaction, N2 reduction reaction, etc. Additionally, preparation methods are introduced and novel properties of various types of heterostructures based on 2D materials are discussed. Furthermore, the reaction principles and intrinsic mechanisms behind the excellent performance of these heterostructures are evaluated. Finally, insights are provided into the challenges and perspectives regarding the future engineering of heterostructures based on 2D materials for further advancements in electrochemical energy conversion.
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Affiliation(s)
- Yujia Zhang
- Frontiers Science Center for Flexible ElectronicsXi'an Institute of Flexible Electronics (IFE)Northwestern Polytechnical UniversityXi'an710129China
| | - Kunkun Nie
- Frontiers Science Center for Flexible ElectronicsXi'an Institute of Flexible Electronics (IFE)Northwestern Polytechnical UniversityXi'an710129China
| | - Lixin Yi
- Frontiers Science Center for Flexible ElectronicsXi'an Institute of Flexible Electronics (IFE)Northwestern Polytechnical UniversityXi'an710129China
| | - Binjie Li
- Frontiers Science Center for Flexible ElectronicsXi'an Institute of Flexible Electronics (IFE)Northwestern Polytechnical UniversityXi'an710129China
| | - Yanling Yuan
- Frontiers Science Center for Flexible ElectronicsXi'an Institute of Flexible Electronics (IFE)Northwestern Polytechnical UniversityXi'an710129China
| | - Zhengqing Liu
- Frontiers Science Center for Flexible ElectronicsXi'an Institute of Flexible Electronics (IFE)Northwestern Polytechnical UniversityXi'an710129China
| | - Wei Huang
- Frontiers Science Center for Flexible ElectronicsXi'an Institute of Flexible Electronics (IFE)Northwestern Polytechnical UniversityXi'an710129China
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