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首页> 外文期刊>Polymers for advanced technologies >Polyvinyl alcohol-modified graphene oxide as a support for bimetallic Pt-Pd electrocatalysts to enhance the efficiency of formic acid oxidation
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Polyvinyl alcohol-modified graphene oxide as a support for bimetallic Pt-Pd electrocatalysts to enhance the efficiency of formic acid oxidation

机译：Polyvinyl alcohol-modified graphene oxide as a support for bimetallic Pt-Pd electrocatalysts to enhance the efficiency of formic acid oxidation

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The aim of this research was to study the efficiency of polyvinyl alcohol (PVA)-modified graphene oxide (GO) as a supporting material for catalysts that oxidize formic acid. The active metal catalysts (e.g., Pt and Pd) were electrodeposited on PVA/GO surfaces. The morphologies of the prepared catalysts were characterized by scanning electron microscopy and transmission electron microscopy, while their chemical compositions were identified by X-ray diffraction and X-ray photoelectron spectroscopy. The results show that compared with the other catalysts on GO, the prepared active PtPd alloy catalyst nanoparticles with 11.49-20.73 nm sizes were well dispersed on the PVA/GO surfaces. Electrochemical results indicate that the activities of the catalysts with PVA provided a higher current density than that of the catalysts without PVA. The bimetallic 3Pt3Pd/PVA/GO catalyst showed the greatest catalytic activity, stability, and CO oxidation when compared to those of other catalysts. The electronic, morphological, and structural properties promote the mass-charge transfer through the interaction. These results indicate that the PVA-modified GO provides a suitable site for active bimetallic catalyst surfaces, resulting in excellent formic acid oxidation and high CO elimination. The 3Pt3Pd/PVA/GO electroca-talyst is promising for enhancing formic acid oxidation.

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