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Your search keyword '"Deng, Zhanfeng"' showing total 16 results
Start Over Author "Deng, Zhanfeng" Publisher elsevier bv
16 results on '"Deng, Zhanfeng"'

10. Solid gravity energy storage: A review

Author

Tong, Wenxuan, primary, Lu, Zhengang, additional, Chen, Weijiang, additional, Han, Minxiao, additional, Zhao, Guoliang, additional, Wang, Xifan, additional, and Deng, Zhanfeng, additional

Published
2022
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11. Core-shell structured metal organic framework materials derived cobalt/iron–nitrogen Co-doped carbon electrocatalysts for efficient oxygen reduction

Author

Hu Xiao, Deng Zhanfeng, Xu Guizhi, Zhiyuan Guo, Xu Ke, Song Jie, Liu Shaoming, and Qing Ye

Subjects
Materials science, Renewable Energy, Sustainability and the Environment, Alloy, Energy Engineering and Power Technology, chemistry.chemical_element, 02 engineering and technology, engineering.material, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Electrocatalyst, 01 natural sciences, 0104 chemical sciences, Catalysis, Fuel Technology, chemistry, Chemical engineering, engineering, Metal-organic framework, 0210 nano-technology, Dispersion (chemistry), Carbon, Pyrolysis, Cobalt
Abstract

Homogeneous dispersion of active sites and abundant pore structure for non-precious metal electrocatalysts are favorable for the oxygen reduction reaction (ORR) activity. Herein, a nitrogen-doped carbon core supported CoFe alloy-nitrogen co-doped carbon shell nanopolyhedron (NC@CoFe,N–CNP) electrocatalyst, which has rich pore structure and uniformly distributed active sites, is prepared through a facile thermal conversion of a ZIF-8 core and Fe,Co-ZIF shell composite precursor (ZIF-8@Fe,Co- ZIF ) without any post-treatments. The existence of ZIF-8 core can maintain the structure of the ZIF-8@Fe,Co-ZIF composite controllable, avoiding the damage to the pore structure for fast mass transfer during pyrolysis. Meanwhile, the bi-metal iron and cobalt co-doping shell is more conducive for uniform dispersion of CoFe alloy particles than single one due to the interval effects, which can create various active sites and efficiently promote the ORR activity. As expected, the optimal NC@CoFe,N–CNP electrocatalyst exhibits an excellent catalytic activity with a high onset potential and half-wave potential (0.970 V and 0.865 V) compared to commercial Pt/C (0.934 V and 0.846 V). The kinetic current density of NC@CoFe,N–CNP reached to 7.99 mA cm−2, which is higher than Pt/C (5.14 mA cm−2) at 0.85 V. Furthermore, the NC@CoFe,N–CNP electrocatalyst demonstrates better electrochemical stability and anti-poisoning ability.

Published
2021
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