In this paper, a facile and rapid aqueous-based electrochemical technique was used for the phase conversion of Ni into Ni(OH) thin film. The Ni(OH) thin film was directly converted and coated onto the network surface of Ni foam (NF) via the self-hydroxylation process under alkaline conditions using a simple cyclic voltammetry (CV) strategy. The as-formed and coated Ni(OH) thin film on the NF was used as the catalyst layer for the direct growth of carbon nanotubes (CNTs).
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