Facile synthesis of novel NiSe

By Xiao Li and Wen-Hui Hu and Yan-Ru Liu and Bin Dong and Guan-Qun Han and Xiao Shang and Yong-Ming Chai and Yun-Qi Liu and Chen-Guang Liu
Published in Materials Letters NULL 2016

Abstract

Novel NiSe-NixSy nanocubes supported on nickel foam (NF) have been prepared by a facile two-step solvothermal process. Firstly, uniform NiSe nanopillar arrays on \NF\ (NiSe/NF) have been achieved using N, N-dimethyl-formamide (DMF) as solvent. Secondly, a sulfuration process has been conducted to synthesize NiSe-NixSy nanocubes on \NF\ (NiSe-NixSy/NF) using NiSe/NF nanopillars as substrate, which may be helpful for the formation and distribution of NiSe-NixSy. \XRD\ indicates the typical crystalline structure of NiSe/NF and NiSe-NixSy/NF without other impurities. The uniformly distributed NiSe nanopillar arrays on \NF\ have been revealed in \SEM\ images. And the unique nanocubes morphology of NiSe-NixSy/NF with the diameter of about 300 nm has been also exhibited. For hydrazine electroxidation, the performances of the as-prepared NiSe/NF and NiSe-NixSy/NF have been investigated as working electrodes, respectively. The electrochemical measurements show a more negative oxidation potential in NiSe-NixSy/NF than the one in NiSe/NF, indicating the excellent activity of novel NiSe-NixSy nanocubes. The corresponding electroxidation mechanisms have been discussed.

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