Citation: Hui Zhao, Chen-Chen Weng, Jin-Tao Ren, Li Ge, Yu-Ping Liu, Zhong-Yong Yuan. Phosphonate-derived nitrogen-doped cobalt phosphate/carbon nanotube hybrids as highly active oxygen reduction reaction electrocatalysts[J]. Chinese Journal of Catalysis, ;2020, 41(2): 259-267. doi: S1872-2067(19)63455-8 shu

Phosphonate-derived nitrogen-doped cobalt phosphate/carbon nanotube hybrids as highly active oxygen reduction reaction electrocatalysts

Hui Zhao ^a,b, ,
Chen-Chen Weng ^a ,
Jin-Tao Ren ^a ,
Li Ge ^a ,
Yu-Ping Liu ^c ,
Zhong-Yong Yuan ^a,c

a National Institute for Advanced Materials, School of Materials Science and Engineering, Nankai University, Tianjin 300350, China;
b School of Materials Science and Engineering, Liaocheng University, Liaocheng 252000, Shandong, China;
c Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, China

Received Date: 18 May 2019
Revised Date: 16 July 2019

Fund Project: This work was supported by the National Natural Science Foundation of China (21421001, 21573115).

The exploration of cost-effective non-noble-metal electrocatalysts is highly imperative to replace the state-of-the-art platinum-based catalysts for oxygen reduction reaction (ORR). Here, we prepared cobalt phosphonate-derived N-doped cobalt phosphate/carbon nanotube hybrids (CoPiC-N/CNTs) by hydrothermal treatment of N-containing cobalt phosphonate and oxidized carbon nanotubes (o-CNT) followed by high-temperature calcination under nitrogen atmosphere. The resultant CoPiC-N/CNT exhibits a superior electrocatalytic performance for the ORR in alkaline media, which is equal to the commercial Pt/C catalyst in the aspect of half-wave potential, onset potential and diffuse limiting current density. Furthermore, the excellent tolerance to methanol and strong durability outperform those of commercial Pt/C. It is found that cobalt phosphonate-derived N-doped cobalt phosphate and the in-situ formed graphitic carbons play key roles on the activity enhancement. Besides, introducing a suitable amount of CNTs enhances the electronic conductivity and further contributes to the improved ORR performance.
- Metal phosphonate,
- Metal phosphate,
- Carbon nanotubes,
- Oxygen reduction reaction,
- Electrocatalysis
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