کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6602640 1424078 2018 33 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Building block nanoparticles engineering induces multi-element perovskite hollow nanofibers structure evolution to trigger enhanced oxygen evolution
ترجمه فارسی عنوان
مهندسی نانو ذرات بلوک باعث تکامل ساختار نانوسیم های توخالی چند منظوره پرووشیکت می شود تا موجب افزایش تکامل اکسیژن شود
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی
Oxygen evolution reaction (OER) plays an important role in various renewable energy systems. Owing to its complex four-electron redox process, the OER process with sluggish kinetics often requires electrocatalysts to reduce the overpotential and promote the reaction rate. Herein, we have proposed an “all-in-one” strategy to synthesize mutil-elemental perovskite oxides nanofibers (NFs) with hollow and porous structures by using electrospinning technology and Ostwald ripening approach. The hollow La0.7Sr0.3Co0.25Mn0.75O3 nanofibers (LSCM NFs) consist of large amounts of building block La0.7Sr0.3Co0.25Mn0.75O3 nanoparticles (LSCM NPs), forming the unique architecture and the morphologies can be engineering by adjusting the calcination temperatures and the heating rates. Notably, the hollow LSCM NFs prepared at 800 °C and 10 °C min−1 demonstrated the excellent electrocatalytic performance, with overpotential of 340 mV at current density of 10 mA cm−2 and Tafel slope of 111 mV dec−1, as well as the long-term stability in alkaline electrolyte. The hollow NFs architectures exhibited a large specific surface area, a high porosity and a large inner space, which are beneficial for the OER, reducing the overpotentials and accelerating the electrode kinetics.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 279, 20 July 2018, Pages 301-310
نویسندگان
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