Citation: DUAN Guang-Bin, FANG Ya-Ting, DONG Kai, JIANG Yuan-Yuan, CHEN Chuan-Xia, NI Peng-Juan, LU Yi-Zhong. Oxygen Reduction Reaction Electrocatalytic Performance Analysis of Annealed Vitamin B12 Coupled with Carbon Nanotube[J]. Chinese Journal of Analytical Chemistry, ;2019, 47(5): 719-724. doi: 10.19756/j.issn.0253-3820.181788 shu

Oxygen Reduction Reaction Electrocatalytic Performance Analysis of Annealed Vitamin B12 Coupled with Carbon Nanotube

School of Materials Science and Engineering, University of Jinan, Jinan 250022, China

Received Date: 19 December 2018
Revised Date: 23 January 2019

Fund Project: This work was supported by the National Natural Science Foundation of China (No. 21705056) and the Natural Science Foundation of Shandong Province, China (Nos. ZR2017MB022, ZR2018BB057, ZR2018PB009).

In the research of fuel cells, the development of cathode oxygen reduction electrocatalysts with low cost and high performance to replace platinum based catalyst is a critical path of realizing the commercialization of fuel cell. Carbon nanomaterials supported transition metal macrocyclic compounds have many advantages including low cost, high activity, strong catalytic selectivity, good electrical conductivity and high stability. Herein, the CNT-VB12 composite was prepared based on the Co-Nx center structure of Vitamin B12 (VB12) through high temperature pyrolysis and with VB12 as the active sites precursor and carbon nanotubes as carrier. We characterized the morphology and the composition of the as-prepared composite, and analyzed its electrocatalytic activity, stability, selectivity and the anti-interference performance for oxygen reduction reaction (ORR). The results showed that the CNT-VB12 exhibited high ORR electrocatalytic activity in alkaline electrolyte (0.1 mol/L KOH). The corresponding electron transfer number was calculated to be close to 4, which suggested that the electrocatalyst reduced O₂ predominately to H₂O. Moreover, the synthesized CNT-VB12 electrocatalyst outperformed commercial Pt/C in terms of better methanol tolerance and stability. All these performance made this CNT-VB12 composite very promising non-precious metal ORR electrocatalyst for practical fuel cell application.
- Carbon nanotubes,
- Vitamin B12,
- Oxygen reduction reaction,
- Electrocatalyst
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