N-doped carbon material encapsulated cobalt nanoparticles for bifunctional electrocatalysts derived from a porous Co(II)-based metal-organic frameworks (MOFs).
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| Title: | N-doped carbon material encapsulated cobalt nanoparticles for bifunctional electrocatalysts derived from a porous Co(II)-based metal-organic frameworks (MOFs). |
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| Authors: | Yang, Rong-Rong1 (AUTHOR), Wu, Yun-Long1 (AUTHOR) 20180717@xpu.edu.cn, Guo, Ying2 (AUTHOR), Yan, Yang-Tian1 (AUTHOR), Li, Rui-Jie1 (AUTHOR), Yang, Guo-Ping3 (AUTHOR), Su, Xiao-Lei1 (AUTHOR), Fu, Chong1 (AUTHOR), He, Xin-Hai1 (AUTHOR), Wang, Yaoyu3 (AUTHOR) |
| Source: | Journal of Solid State Chemistry. May2022, Vol. 309, pN.PAG-N.PAG. 1p. |
| Subjects: | Graphitization, Metal-organic frameworks, Hydrogen evolution reactions, Oxygen evolution reactions, Electrocatalysts, Cobalt, Composite materials |
| Abstract: | In this report, a bifunctional electrocatalyst: Co nanoparticles attached on N-doped graphitized carbon material (Co@NC) was obtained by utilizing the porous Co(II)-based metal-organic frameworks (MOFs) as precursors under the one-step thermal treatment. The composites were fully analyzed by XRD, XPS, SEM, TEM, and BET and so on. The electrochemical explorations (OER and HER) show that the overpotential of Co@NC-6h- 3 at the current density 10 mA cm−2 is the lower the commercial RuO 2 catalyst (350 mA for 3 ; 380 mA for RuO 2). The Tafel slopes of the composite material are 63 mV dec−1, which is comparable to the RuO 2 (58 mV dec−1). The HER exploration show that the overpotential are 220 mv for 3 , and the Tafel slopes of 3 is 119 mV dec−1 for 3. The explorations reveals that the composites Co@NC-6h- 3 reveals good and stable catalytic performances for HER and OER, providing us with an efficient method to obtain the electrocatalysts via the pyrolysis of MOFs. [Display omitted] In this report, a new bifunctional electrocatalyst with the structure of Co nanoparticles embedded into N-doping graphitized carbon materials (Co@NC) was obtained by using a porous Co(II)-based metal-organic frameworks (MOFs) as precursor under the one-step thermal treatment. The electrochemical properties explorations show that Co@NC-6h- 3 reveals the excellent and stable catalytic performances for both hydrogen and oxygen evolution reactions (HER and OER). • ►A bifunctional electrocatalyst composites based Co, N and C are obtained by using a Co(II)-based MOFs. • ►The advantage is that Co nanoparticles can uniformly disperse in the electrocatalyst composite materials. • ►Co@NC-6h- 3 shows the excellent and stable catalytic performances for HER and OER. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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