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Biomass‐Templated Preparation of Hierarchically Multi‐Functional Ni/NiO@C Hollow‐Fibers
Author(s) -
Su Bitao,
Wang Yangchen,
Luo Hao,
Zhong Ming,
Lei Ziqiang
Publication year - 2021
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.202000268
Subject(s) - calcination , non blocking i/o , materials science , oxygen evolution , chemical engineering , fiber , morphology (biology) , nanotechnology , catalysis , composite material , chemistry , electrode , electrochemistry , organic chemistry , biology , genetics , engineering
Two series of hierarchically Ni/NiO@C hollow‐fibers with magnetic, adsorptive, and electrocatalytic oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) properties are successfully prepared via a facile and green cotton fiber (CF)‐templated dipping/adsorbing‐calcining strategy. The effect of calcination temperature and CF amount on morphologies, components, and properties of the as‐prepared materials is investigated. The results demonstrate that a proper CF template can endow the as‐obtained materials with hierarchically hollow‐fiber morphology and multi‐components (Ni 0 , NiO, and C) at a certain calcination temperature, therefore providing excellent magnetic, adsorptive, and electrocatalytic OER and HER properties. Specifically, the unique hierarchical morphology and synergistic effect between Ni 0 and NiO remarkably enhance OER and HER properties of as‐prepared samples. This strategy is low‐cost, simple, eco‐friendly, and could be extended to prepare other composites with multi‐components and functionalities.