Chitosan pyrolysis in the presence of a ZnCl2/NaCl salts for carbons with electrocatalytic activity in oxygen reduction reaction in alkaline solutions

Maria K. Kochaniec; Marek Lieder

doi:10.1038/s41598-024-72411-1

Chitosan pyrolysis in the presence of a ZnCl2/NaCl salts for carbons with electrocatalytic activity in oxygen reduction reaction in alkaline solutions

Abstract

The one-step carbonization of low cost and abundant chitosan biopolymer in the presence of salt eutectics ZnCl2/NaCl results in nitrogen-doped carbon nanostructures (8.5 wt.% total nitrogen content). NaCl yields the spacious 3D structure, which allows external oxygen to easily reach the active sites for the oxygen reduction reaction (ORR) distinguished by their high onset potential and the maximum turnover frequency of 0.132 e site−1 s− 1. Data show that the presence of NaCl during the synthesis exhibits the formation of pores having large specific volumes and surface (specific surface area of 1217 m2 g−1), and holds advantage by their pores characteristics such as their micro-size part, which provides a platform for mass transport distribution in three-dimensional N-doped catalysts for ORR. It holds benefit over sample pre-treated with LiCl in terms of the micropores specific volume and area, seen as their percentage rate, measured in the BET. Therefore, the average concentration of the active site on the surface is larger.

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Authors (2)

Maria K. Kochaniec
Marek Lieder dr hab. inż.
- Faculty of Chemistry
- Gdańsk University of Technology

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DOI:: Digital Object Identifier (open in new tab) 10.1038/s41598-024-72411-1
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Keywords

CARBONIZED CHITOSAN, SUSTAINABLE ENERGY, NANOSTRUCTURES, ORR ACTIVITY, MICROPOROSITY

Details

Category:

Articles

Type:

artykuły w czasopismach

Published in:

Scientific Reports no. 14,
ISSN: 2045-2322

Language:

English

Publication year:

2024

Bibliographic description:

Kochaniec M. K., Lieder M.: Chitosan pyrolysis in the presence of a ZnCl2/NaCl salts for carbons with electrocatalytic activity in oxygen reduction reaction in alkaline solutions// Scientific Reports -Vol. 14,iss. 1 (2024),

DOI: