期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 43, 期 5, 页码 2742-2753出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2017.12.091
关键词
Cobalt oxide; Core-shell like PPy/Co3O4; Nanospheres; Methanol oxidation reaction; Electrocatalysis
资金
- Deanship of Scientific Research at King Saud University [RGP-133]
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 nano shell (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 similar to 111 mA/cm(2) 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. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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