Facile synthesis of novel NiSe
By Li, Xiao; Hu, Wen-Hui; Liu, Yan-Ru; Dong, Bin; Han, Guan-Qun; Shang, Xiao; Chai, Yong-Ming; Liu, Yun-Qi; Liu, Chen-Guang
Published in Materials Letters
NULL
2016
Abstract
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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