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13 results on '"Fuhao Jin"'

1. Vacancy engineering of oxidized Nb2CTx MXenes for a biased nitrogen fixation

Author

Mengzhao Zhang, Hanqing Yin, Fuhao Jin, Jingquan Liu, Xuqiang Ji, Aijun Du, Wenrong Yang, and Zhen Liu

Subjects
Nitrogen reduction reaction, Nb-based MXenes, Oxygen vacancy, Vacancy engineering, Electrocatalysis, Renewable energy sources, TJ807-830, Ecology, QH540-549.5
Abstract

The artificial nitrogen (N2) reduction reaction (NRR) via electrocatalysis is a newly developed methodology to produce ammonia (NH3) at ambient conditions, but faces the challenges in N2 activation and poor reaction selectivity. Herein, Nb-based MXenes are developed to remarkably enhance the NRR activity through the engineering of the stretched 3D structure and oxygen vacancies (VO). The theoretical studies indicate that N2 could be initially adsorbed on VO with an end-on configuration, and the potential determining step might be the first hydrogenation step. The catalysts achieve an NH3 production rate of 29.1 μg h−1 mgcat−1 and excellent Faradic efficiency of 11.5%, surpassing other Nb-based catalysts. The selectivity of NRR is assigned to the unique structure of the catalysts, including (1) the layered graphitic structure for fast electron transfer and active site distribution, (2) the reactive VO for N2 adsorption and activation, and (3) the expanded interlayer space for mass transfer.

Published
2023
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4. Embedding of conductive Ag nanoparticles among honeycomb-like NiMn layered double hydroxide nanosheet arrays for ultra-high performance flexible supercapacitors

Author

Hucheng, Fu, Aitang, Zhang, Hanwen, Zong, Fuhao, Jin, Hanwen, Guo, and Jingquan, Liu

Subjects
Biomaterials, Colloid and Surface Chemistry, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials
Abstract

Layered double hydroxides are considered promising electrode materials for the preparation of high-energy-density supercapacitors owing to their suitable microstructure and significant electrochemical properties. In this study, honeycomb-like NiMn-layered double-hydroxide (NiMn-LDH) nanosheet arrays with numerous electron/ion channels, a large number of active sites, considerable redox reversibility, and significant electrical conductivity were synthesized by combining Co

Published
2023

7. Origami and layered-shaped ZnNiFe-LDH synthesized on Cu(OH)2 nanorods array to enhance the energy storage capability

Author

Fuhao Jin, Jingquan Liu, Hucheng Fu, Wenting Cheng, Wenjun Huang, Hanwen Guo, and Aitang Zhang

Subjects
Supercapacitor, Materials science, Electrochemistry, Capacitance, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Nanomaterials, Biomaterials, Colloid and Surface Chemistry, Transition metal, Chemical engineering, Electrode, Nanorod, Nanosheet
Abstract

The combination of layered nanorod arrays with unique core–shell structure and transition metal layered double hydroxide (LDH) is considered as a feasible solution to improve the electrochemical performances of capacitor electrode. In this study, layered ZnNiFe-LDH@Cu(OH)2/CF core–shell nanorod arrays, which consist of ultrathin ZnNiFe-LDHs nanosheet shells and ordered Cu(OH)2 nanorod inner cores, are successfully designed and fabricated by a typical hydrothermal way and a simple in situ oxidation reaction. The electrode prepared using ZnNiFe-LDH@Cu(OH)2/CF nanomaterial reveals an remarkable area capacitance of 6100 mF cm−2 at 3 mA cm−2 current density, which is excellently superior than those of ZnFe-LDH@Cu(OH)2/CF, NiFe-LDH@Cu(OH)2/CF, Cu(OH)2/CF and CF. Additionally, the capacitance retention remains as high as 83.4% after 5000 cycles and a very small Rs (0.567 Ω) can be observed. In addition, an asymmetric supercapacitor device is successfully fabricated employing ZnNiFe-LDH@Cu(OH)2/CF. Meanwhile, the ZnNiFe-LDH@Cu(OH)2/CF//AC device can achieve an energy density of 44 Wh kg−1 and a corresponding power density of 720 W kg−1 and possess the capability to light up a multi-function monitor for 33 min just using two ASC equipments connected in series. Therefore, the prepared ZnNiFe-LDH@Cu(OH)2/CF composite materials with unique structure has great application potential in energy storage devices.

Published
2022

12. Origami and layered-shaped ZnNiFe-LDH synthesized on Cu(OH)

Author

Hucheng, Fu, Aitang, Zhang, Fuhao, Jin, Hanwen, Guo, Wenjun, Huang, Wenting, Cheng, and Jingquan, Liu

Abstract

The combination of layered nanorod arrays with unique core-shell structure and transition metal layered double hydroxide (LDH) is considered as a feasible solution to improve the electrochemical performances of capacitor electrode. In this study, layered ZnNiFe-LDH@Cu(OH)

Published
2021

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