کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5146271 | 1497345 | 2017 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Trimetallic NiFeCo selenides nanoparticles supported on carbon fiber cloth as efficient electrocatalyst for oxygen evolution reaction Trimetallic NiFeCo selenides nanoparticles supported on carbon fiber cloth as efficient electrocatalyst for oxygen evolution reaction](/preview/png/5146271.png)
- A facile two-step method was used to synthesize NiFeCoSex on carbon fiber cloth.
- Trimetallic NiFeCo hydroxides have been electrodeposited on CFC as precursor.
- DMF solvothermal selenization was used to convert NiFeCo/CFC into NiFeCoSex/CFC.
- The enhanced activity of NiFeCoSex/CFC may be attributed to NiFeCo and metal-CFC.
Trimetallic NiFeCo selenides (NiFeCoSex) anchored on carbon fiber cloth (CFC) as efficient electrocatalyst for oxygen evolution reaction (OER) in alkaline medium have been synthesized via a facile two-step method. Firstly, trimetallic NiFeCo (oxy) hydroxides have been electrodeposited on CFC support (NiFeCo/CFC). Secondly, a solvothermal selenization process has been used to convert NiFeCo/CFC into NiFeCoSex/CFC using N, N-dimethylformamide (DMF) as solvent. The composition and homogeneous distribution of NiFeCoSex/CFC nanoparticles are determined by XRD, XPS, SEM elemental mapping and EDX images. Furthermore, SEM images reveal that NiFeCoSex/CFC has volcano-shaped morphology with rough surface and homogenously distributed on the surface of CFC, which may provide more active sites for OER. The electrochemical measurements show that trimetallic NiFeCoSex/CFC possesses the better electrocatalytic activity with the lower overpotential (150Â mV at 10Â mAÂ cmâ2), Tafel slope (85Â mVÂ decâ1), larger double-layer capacitance (200Â mFÂ cmâ2) and long-term stability than unary or binary metal selenides. The enhanced activity of NiFeCoSex/CFC may be attributed to the trimetallic NiFeCo selenides and selenides-CFC synergistic interaction. It may offer a promising way to design transition multimetallic selenides supported on conductive support as electrocatalysts for OER.
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Journal: International Journal of Hydrogen Energy - Volume 42, Issue 32, 10 August 2017, Pages 20599-20607