Issue 12, 2022

Synthesis of poly(2,6-diaminopyridine) using a rotating packed bed toward efficient production of polypyrrole-derived electrocatalysts

Abstract

Synthesis of pyridinic nitrogen-rich polymers is a key step in obtaining high-performance polypyrrole-derived electrocatalysts for the oxygen reduction reaction. A straightforward and controllable synthesis method is highly favored to efficiently manipulate the structural and electronic properties of polypyrrole-derived electrocatalysts. Herein, the strategy for the preparation of poly(2,6-diaminopyridine) (PDAP) is developed with the assistance of an external circulation rotating packed bed (EC-RPB). The polymerization could be divided into two stages: a kinetically fast stage and a rate-determining phase-transfer stage. By using the EC-RPB, the polymerization is sufficiently reduced to 3 h with a conversion rate of over 90% achieved due to accelerated mass transfer in the second stage, exhibiting significant improvement in the common processing for PDAP (∼87% in 12 h). Furthermore, with co-doped iron and manganese species, the obtained catalyst shows a good ORR activity and stability, with up to 0.881 V of half-wave potential in an alkaline environment and 0.718 V in an acid environment. This work proposes a facile and efficient synthesis method for PDAP which could also be extended to the production of other polypyridine-derived electrocatalysts.

Graphical abstract: Synthesis of poly(2,6-diaminopyridine) using a rotating packed bed toward efficient production of polypyrrole-derived electrocatalysts

Article information

Article type
Paper
Submitted
27 jul. 2022
Accepted
25 ago. 2022
First published
25 ago. 2022

React. Chem. Eng., 2022,7, 2611-2617

Synthesis of poly(2,6-diaminopyridine) using a rotating packed bed toward efficient production of polypyrrole-derived electrocatalysts

L. Deng, Y. Jiao, Y. Pu, D. Liu and D. Wang, React. Chem. Eng., 2022, 7, 2611 DOI: 10.1039/D2RE00296E

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