Composites of Platinum-Iridium Alloy Nanoparticles and GrapheneOxide for the Dimethyl Amine Borane (DMAB) dehydrogenation at ambient conditions: AnExperimental and Density Functional Theory Study

Betül Sen,Mehmet Harbi Çalımlı,Mehmet Ferdi Fellah,Ayşenur Aygun,Fatih Sen,Aysun Şavk

doi:10.1038/s41598-019-52038-3

Betül Sen, Mehmet Harbi Çalımlı + Show 4 more

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https://doi.org/10.1038/s41598-019-52038-3

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Abstract

In this paper, we present the synthesis, characterization, catalytic andcomputational studies of Composites of Platinum-Iridium Alloy Nanoparticles andGraphene Oxide (PtIr@GO) for dimethylamine borane (DMAB) dehydrogenation. Theprepared PtIr@GO nanocatalysts were synthesized using an ethanol super-hydridemethod, and the characterization procedures for PtIr@GO alloy nanoparticles werecarried out by various advanced spectroscopic methods like X-ray Diffraction (XRD),X-ray photoelectron spectroscopy (XPS), Transmission Electron Microscopy(TEM) andhigh-resolution transmission electron microscopy (HRTEM). Additionally, catalyticactivity, reusability, substrate concentration, and catalyst concentrationexperiments were performed for DMAB dehydrogenation catalyzed by PtIr@GO alloynanomaterials. According to the results obtained in this study, PtIr@GO NPs catalystwas found to be active and reusable for the DMAB even at ambient conditions.Besides, DFT-B3LYP calculations have been utilized on PtIr@GO cluster to reveal theprepared catalyst activity. The calculated findings based on DFT was found to be agood agreement with experimental results.

Highlights

We present the synthesis, characterization, catalytic and computational studies of Composites of Platinum-Iridium Alloy Nanoparticles and Graphene Oxide (PtIr@graphene oxide (GO)) for dimethylamine borane (DMAB) dehydrogenation
Composites of Platinum-Iridium Alloy Nanoparticles and Graphene Oxide were prepared by the reducing of platinum (IV) and iridium (III) chlorine salts in a THF solution with the super hydride ethanol reduction method at ambient conditions
Upon reduction of Pt (IV) and Ir (III) to Pt (0) and Ir (0), respectively, the precipitation and agglomeration were formed without graphene oxide

Summary

Introduction

We present the synthesis, characterization, catalytic and computational studies of Composites of Platinum-Iridium Alloy Nanoparticles and Graphene Oxide (PtIr@GO) for dimethylamine borane (DMAB) dehydrogenation. For the first time, the synthesis, characterization and kinetic activity of platinum and iridium supported graphene oxide (PtIr@GO) alloy nanoparticles were investigated for DMAB catalytic dehydrogenation.

Results

Conclusion