Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Preparation and Characterization of Multi-doped Porous Carbon Nanofibers from Carbonization in Different Atmospheres and Their Oxygen Electrocatalytic Properties Research

Tao Wang
,
Oluwafunmilola Ola
ORCID logo ,
Qijian Niu
* ORCID logo ,
Yuhao Lu
,
Malcom Frimpong Dapaah
,
Liang Cheng
,
Nannan Wang
ORCID logo ,
Yanqiu Zhu
*
Version 1 : Received: 8 January 2022 / Approved: 10 January 2022 / Online: 10 January 2022 (15:23:04 CET)

A peer-reviewed article of this Preprint also exists.

Wang, T.; Ola, O.; Dapaah, M.F.; Lu, Y.; Niu, Q.; Cheng, L.; Wang, N.; Zhu, Y. Preparation and Characterization of Multi-Doped Porous Carbon Nanofibers from Carbonization in Different Atmospheres and Their Oxygen Electrocatalytic Properties Research. Nanomaterials 2022, 12, 832. Wang, T.; Ola, O.; Dapaah, M.F.; Lu, Y.; Niu, Q.; Cheng, L.; Wang, N.; Zhu, Y. Preparation and Characterization of Multi-Doped Porous Carbon Nanofibers from Carbonization in Different Atmospheres and Their Oxygen Electrocatalytic Properties Research. Nanomaterials 2022, 12, 832.

DOI: 10.3390/nano12050832

Abstract

Recently, electrocatalysts for oxygen reduction reactions (ORRs) as well as oxygen evolution reactions (OERs) hinged on electrospun nanofiber composites have attracted wide research attention. Transition metal elements and heteroatomic doping are important methods used to enhance their catalytic performances. Lately, the construction of electrocatalysts based on metal-organic framework (MOF) electrospun nanofibers has become a research hotspot. In this work, bimetallic NixCoy-ZIF nanocrystals were synthesized in an aqueous solution, followed by NixCoy-ZIF/PAN electrospun nanofiber precursors, which were prepared by a simple electrospinning method. Bimetal (Ni-Co) porous carbon nanofiber catalysts doped with nitrogen, oxygen, and sulfur elements were obtained at high-temperature carbonization treatment in different atmospheres (Ar, Air, and H2S), respectively. The morphological properties, structures, and composition were characterized by SEM, TEM, SAED, XRD, and XPS. Also, the specific surface area of materials and their pore size distribution was characterized by BET. Linear sweep voltammetry curves investigated catalyst performances towards oxygen reduction and evolution reactions. Importantly, Ni1Co2-ZIFs/PAN-Ar yielded the best ORR activity, whereas Ni1Co1-ZIFs/PAN-Air exhibited the best OER performance. This work provides significant guidance for the preparation and characterization of multi-doped porous carbon nanofibers carbonized in different atmospheres.

Keywords

electrospinning; porous carbon nanofibers; oxygen reduction reaction; oxygen evolution reaction

Subject

MATERIALS SCIENCE, Nanotechnology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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