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Tao Y, Jiang W, Wang H, Hao W, Bi Q, Liu X, Fan J, Li G. Tuning electronic structure of hedgehog-like nickel cobaltite via molybdenum-doping for enhanced electrocatalytic oxygen evolution catalysis. J Colloid Interface Sci 2024; 657:921-930. [PMID: 38091915 DOI: 10.1016/j.jcis.2023.12.048] [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: 10/04/2023] [Revised: 12/05/2023] [Accepted: 12/08/2023] [Indexed: 01/02/2024]
Abstract
As a typical spinel oxide, nickel cobaltite (NiCo2O4) is considered to be a promising and reliable oxygen evolution reaction (OER) catalyst due to its abundant oxidation states and the synergistic effect of multiple metal species. However, the electrocatalytic OER performance of NiCo2O4 has always been limited by the low specific surface area and poor intrinsic conductivity of spinels. Herein, the hedgehog-like molybdenum-doped NiCo2O4 (Mo-NiCo2O4) catalyst was prepared as an efficient OER electrocatalyst via a facile hydrothermal method followed with high-temperature annealing. The Mo-NiCo2O4-0.075 with Mo doping concentration of ∼ 1.95 wt% exhibits excellent OER performance with a low overpotential of 265 mV at a current density of 10 mA·cm-2and a Tafel slope of 126.63 mV·dec-1, as well as excellent cyclingstability.The results demonstrated that the hedgehog-like structure provides Mo-NiCo2O4 with the high surface area and mesopores that enhance electrolyte diffusion and optimal active site exposure. The in-situ Raman spectra and density functional theory calculations show that the Mo cations doping improve the intrinsic conductivity of the NiCo2O4 while modulating the chemisorption of intermediates. Meanwhile, the energy barriers of *OH and O* formation decrease significantly after Mo doping, effectively facilitating water dissociation and optimizing the reaction kinetics.
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Affiliation(s)
- Yinghao Tao
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, PR China
| | - Wendan Jiang
- New Energy Research Institute, School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou, Guangdong 510006 PR China
| | - Hui Wang
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, PR China
| | - Weiju Hao
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, PR China
| | - Qingyuan Bi
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, PR China
| | - Xinjuan Liu
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, PR China
| | - Jinchen Fan
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, PR China.
| | - Guisheng Li
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, PR China
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Han D, Du G, Wang Y, Jia L, Chen S, Zhao W, Su Q, Ding S, Zhang M, Xu B. Three-dimensional carbon network-supported black phosphorus-cobalt heterojunctions: An efficient electrocatalyst for high-rate oxygen evolution. J Colloid Interface Sci 2023; 651:415-423. [PMID: 37549526 DOI: 10.1016/j.jcis.2023.08.008] [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: 05/09/2023] [Revised: 07/29/2023] [Accepted: 08/02/2023] [Indexed: 08/09/2023]
Abstract
Black phosphorus (BP), as a burgeoning two-dimensional material, has shown good electrocatalytic activity due to its unique electronic structure and abundant active sites.However, the presence of lone pair electrons in black phosphorus leads to its poor stability and rapid degradation in an oxygen/water environment, which greatly limits its practical application. Herein, BP-Co heterojunctions were synthesized on carbon nanotube@nitrogen-doped carbon (BP-Co/CNT@NC) by the pyrolysis of ZnCo-zeolitic imidazolate frameworks and subsequent solvothermal treatment. The BP-Co Schottky junction improved the electrocatalytic stability of BP, modulated its electronic structure, improved its conductivity and electron transfer during the electrocatalytic reaction. Density functional theory calculation was used to confirm the electron transfer and redistribution at the interface between BP and Co, which constructed an oppositely charged region and formed a strong built-in field. Energy band configuration analysis revealed a narrowed band gap because of the formation of BP-Co Schottky junction. Consequently, the optimized BP-Co/CNT@NC exhibited a superior oxygen evolution reaction (OER) performance, a low overpotential of 370 mV@100 mA/cm2, with a small Tafel slope of 40 mV/dec and good long-term stability. Particularly, the catalyst has an excellent OER performance at the high current density of 100-400 mA/cm2. This strategy improves the stability of BP electrocatalysts and strengthens their utilization in electrocatalytic applications.
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Affiliation(s)
- Di Han
- Materials Institute of Atomic and Molecular Science, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Gaohui Du
- Materials Institute of Atomic and Molecular Science, Shaanxi University of Science and Technology, Xi'an 710021, China; Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan 030000, China.
| | - Yunting Wang
- Materials Institute of Atomic and Molecular Science, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Lina Jia
- Materials Institute of Atomic and Molecular Science, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Shixian Chen
- Materials Institute of Atomic and Molecular Science, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Wenqi Zhao
- Materials Institute of Atomic and Molecular Science, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Qingmei Su
- Materials Institute of Atomic and Molecular Science, Shaanxi University of Science and Technology, Xi'an 710021, China.
| | - Shukai Ding
- Materials Institute of Atomic and Molecular Science, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Miao Zhang
- Materials Institute of Atomic and Molecular Science, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Bingshe Xu
- Materials Institute of Atomic and Molecular Science, Shaanxi University of Science and Technology, Xi'an 710021, China; Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan 030000, China; Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Taiyuan 030024, China.
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Han J, Niu X, Guan J. Unveiling the role of defects in iron oxyhydroxide for oxygen evolution. J Colloid Interface Sci 2023; 635:167-175. [PMID: 36586142 DOI: 10.1016/j.jcis.2022.12.128] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/20/2022] [Accepted: 12/24/2022] [Indexed: 12/28/2022]
Abstract
Development of earth-abundant and robust oxygen evolution reaction (OER) catalysts is imperative for cost-effective hydrogen production via water electrolysis. Herein, we report ultrafine iron (oxy)hydroxide nanoparticles with average particle size of 2.6 nm and abundant surface defects homogeneously supported on oleum-treated graphite (FeOx(n)@HG-T), providing abundant active sites for the OER. The optimal FeOx(0.03)@HG-110 exhibits high electrocatalytic OER activity and excellent stability. Electrochemical testing results and theoretical calculations reveal that the outstanding OER activity of FeOx(0.03)@HG-110 is due to its stronger charge transfer ability and lower OER energy barrier than defect-free FeOx nanoparticles. This work demonstrates that the OER performance of oxyhydroxide-based electrocatalysts can be improved by surface defect engineering.
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Affiliation(s)
- Jingyi Han
- Institute of Physical Chemistry, College of Chemistry, Jilin University, 2519 Jiefang Road, Changchun 130021, China
| | - Xiaodi Niu
- College of Food Science and Engineering, Jilin University, Changchun 130062, China.
| | - Jingqi Guan
- Institute of Physical Chemistry, College of Chemistry, Jilin University, 2519 Jiefang Road, Changchun 130021, China.
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Gebreslase GA, Sebastián D, Martínez-Huerta MV, Tsoncheva T, Tsyntsarski B, Georgiev G, Lázaro MJ. CoFe-loaded P, N co-doped carbon foam derived from petroleum pitch waste: an efficient electrocatalyst for oxygen evolution reaction. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.12.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Zhu W, Chen P, Lang L, Zhu Y, Bao J, Zeng L, Zhang R, Zhu G. CoCu-hydroxyquinoline loaded on copper foam as effective pre-catalytic electrode for oxygen evolution. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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