کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5352242 1503567 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Silver decorated LaMnO3 nanorod/graphene composite electrocatalysts as reversible metal-air battery electrodes
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Silver decorated LaMnO3 nanorod/graphene composite electrocatalysts as reversible metal-air battery electrodes
چکیده انگلیسی


- Silver decorated LaMnO3 nanorod/graphene composite were synthesized for the first time.
- The ORR and OER of composite in alkaline medium were evaluated.
- This composite as an efficient bifunctional catalyst has a good cycle performance.

Perovskite LaMnO3 nanorod/reduced graphene oxides (LMO-NR/RGO) decorated with Ag nanoparticles are studied as a bifunctional catalyst for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in alkaline electrolyte. LMO-NR/RGO composites are synthesized by using cetyltrimethyl ammonium bromide (CTAB) as template via a simple hydrothermal reaction followed by heat treatment; overlaying of Ag nanoparticles is obtained through a traditional silver mirror reaction. Electron microscopy reveals that LMO-NR is embedded between the sheets of RGO, and the material is homogeneously overlaid with Ag nanoparticles. The unique composite morphology of Ag/LMO-NR/RGO not only enhances the electron transport property by increasing conductivity but also facilitates the diffusion of electrolytes and oxygen. As confirmed by electrochemical testing, Ag/LMO-NR/RGO exhibits very strong synergy with Ag nanoparticles, LMO-NR, and RGO, and the catalytic activities of Ag/LMO-NR/RGO during ORR and OER are significantly improved. With the novel catalyst, the homemade zinc-air battery can be reversibly charged and discharged and display a stable cycle performance, indicating the great potential of this composite as an efficient bifunctional electrocatalyst for metal-air batteries.

Silver decorated LaMnO3 nanorod/reduced graphene oxide composite possess excellent bifunctional electrocatalytic activity and good electrochemical stability in alkaline medium.223

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 402, 30 April 2017, Pages 61-69
نویسندگان
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