Catalytic enhancement of formic acid electro-oxidation through surface modifications with gold on supported Pt nanoparticles
The Formic Acid Electro-oxidation (FAEO) on Pt/Au Nanoparticles (PtAu NP) supported on Hierarchical Porous Carbon (HPC), was studied by cyclic voltammetry and chronoamperometry. The supported HPC-Pt nanoparticles were surface modified by Au spontaneous deposits. The morphological and compositional c...
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Published in | International journal of hydrogen energy Vol. 44; no. 3; pp. 1967 - 1972 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
15.01.2019
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Subjects | |
Online Access | Get full text |
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Summary: | The Formic Acid Electro-oxidation (FAEO) on Pt/Au Nanoparticles (PtAu NP) supported on Hierarchical Porous Carbon (HPC), was studied by cyclic voltammetry and chronoamperometry. The supported HPC-Pt nanoparticles were surface modified by Au spontaneous deposits. The morphological and compositional characterization was performed by Scanning Electron Microscopy (SEM) coupled with Electron Dispersive Spectroscopy (EDS). A significant increase of the current densities for FAEO in the potential region 0.1–0.75 VRHE was observed on HPC-PtAu catalysts. The comparison with HPC-Pt electrodes results show that Au atoms presence on Pt nanoparticles is a key factor to improve the catalysts performance. Based on our results, a clear change in FAEO mechanism on HPC-PtAu catalysts with respect to HPC-Pt was evidenced.
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•Pt NP supported on Hierarchical Porous Carbon were modified by Au spontaneous deposits.•HPC-PtAu show enhanced activity for Formic Acid Electro-Oxidation (FAEO).•A clear change in the FAEO mechanism on HPC-PtAu is manifest.•Higher current transients in FAEO on HPC-PtAu catalysts are observed. |
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ISSN: | 0360-3199 1879-3487 |
DOI: | 10.1016/j.ijhydene.2018.11.138 |