聚吡咯
介孔材料
材料科学
电解质
阳极
纳米壳
化学工程
甲醇
催化作用
钴
氧化物
氧化钴
电极
纳米技术
无机化学
纳米颗粒
化学
复合材料
聚合
有机化学
冶金
聚合物
物理化学
工程类
作者
Diab Khalafallah,Othman Y. Alothman,Hassan Fouad,Khalil Abdelrazek Khalil
标识
DOI:10.1016/j.ijhydene.2017.12.091
摘要
In recent times, much attention has been paid to explore economic and highly active precious metal free electrocatalysts for energy conversion and storage systems due to the expensiveness of Pt-based catalysts. Here we developed a mesoporous core-shell like nanospheres composed of a metallic cobalt oxide core wrapped with a polypyrrole nanoshell (PPy/Co3O4) for methanol electrooxidation. The performance of the core-shell PPy/Co3O4 nanospheres as anodic catalyst material was measured in 1 M KOH electrolyte and the results obtained demonstrated that the hybrid possesses high catalytic activity in terms of current density and onset voltage. The core-shell PPy/Co3O4 delivers an oxidation current density of ∼111 mA/cm2 at 0.5 V with superior stability long run stability. The observed electrocatalytic performance of the porous PPy/Co3O4 nanospheres is attributed to the integrative effects of both Co-species and layered carbon shell and presence of exceptionally numerous mesopores. Results show evidence that the earth abundant PPy/Co3O4 provide a potential electrode material for methanol electrooxidation with a satisfactory reaction activity.
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