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.

近年来，由于Pt基催化剂的昂贵，人们已经非常关注开发用于能量转化和存储系统的经济和高活性的无贵金属无电催化剂。在这里，我们开发了一种介孔的核壳状纳米球，它由包裹有聚吡咯纳米壳（PPy / Co ₃ O ₄）的金属钴氧化物核构成，用于甲醇的电氧化。在1 M KOH电解质中测量了核壳型PPy / Co ₃ O ₄纳米球作为阳极催化剂材料的性能，所得结果表明，该杂化体在电流密度和起始电压方面具有较高的催化活性。核壳型PPy / Co ₃ O ₄在0.5 V电压下可提供〜111 mA / cm ²的氧化电流密度，并具有出色的稳定性，长期稳定性。观察到的多孔PPy / Co ₃ O ₄纳米球的电催化性能归因于Co物种和层状碳壳的整合作用以及异常大量的中孔的存在。结果表明，富含地球的PPy / Co ₃ O ₄为甲醇电氧化提供了一种电位电极材料，具有令人满意的反应活性。