کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7212328 1469348 2018 50 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Polyaniline-metal organic framework nanocomposite as an efficient electrocatalyst for hydrogen evolution reaction
ترجمه فارسی عنوان
نانوکامپوزیت چسب آلومینیوم فلزیلین فلز به عنوان یک الکتروکاتورالیزم کارآمد برای واکنش تکامل هیدروژن
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
چکیده انگلیسی
Polyaniline-metal organic framework (PANI/MOF) composite was prepared by chemical oxidation of aniline monomer in the presence of 3.6 wt% MOF content for hydrogen evolution reaction (HER). The structure, morphology and properties of the fabricated composite were investigated. There was a clear interaction of MOF on the backbone of the PANI matrix through electrostatic interaction as investigated by both Raman and Fourier transform infrared analyses. The MOF exhibited irregular crystals with further wrapping of MOF by PANI matrix as evidenced by both scanning electron microscopy and transmission electron microscopy studies. The PANI composite showed some nanorods and microporous structure. The energy band gap values of PANI and its composite were found to be 1.50 and 1.35 eV, respectively. The thermal stability of the neat PANI increased upon composite formation, which was due to a stabilizing effect of MOF and a change in morphology of the composite. The catalytic effect of MOF, PANI and PANI/MOF composite on HER was studied using exchange current density (i0) and charge transfer coefficient determined by the Tafel slope method. A drastic increase in catalytic H2 evolution was observed in the composite. In addition, the Tafel slope values of PANI and the composite decreased with increasing the concentration of the acid, suggesting the Volmer reaction coupled with either Heyrovsky or Tafel reaction. The i0 increased with increasing the acid concentration and in an order of PANI/MOF > MOF > PANI at various concentrations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composites Part B: Engineering - Volume 137, 15 March 2018, Pages 129-139
نویسندگان
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