Abstract
Non-thermal plasma treatment has great potential to open a fast and green route for controllable synthesis of highly active supported metal catalysts.
Highlights
The International Energy Agency reported that global emissions of carbon dioxide reached a record high of 33bn tonnes in 2018 as the energy demand rose by 2.3%.1 The growth in energy demand was met mainly by the use of fossil fuels, the rise in carbon dioxide (CO2) emissions
We report formic acid dehydrogenation for hydrogen production over activated carbon (AC) supported Pd catalysts synthesized using different methods: thermal treatment (Pd/C-C), plasma treatment (Pd/C-P), thermal treatment followed by plasma treatment (Pd/C-CP), and plasma treatment followed by thermal treatment (Pd/C-PC)
The Pd particle size of Pd/C-PC synthesized by cold plasma treatment followed by thermal treatment is much larger than that of the other Pd/C catalysts
Summary
The International Energy Agency reported that global emissions of carbon dioxide reached a record high of 33bn tonnes in 2018 (up 1.7% from the previous year) as the energy demand rose by 2.3%.1 The growth in energy demand was met mainly by the use of fossil fuels, the rise in carbon dioxide (CO2) emissions. The use of supported Pd catalysts in the efficient generation of hydrogen from formic acid has attracted significant interest due to their high performance under mild conditions.[15,16,17] in the preparation of supported Pd catalysts (e.g., Pd/activated carbon), these catalysts are often reduced by chemical reduction using toxic or excess reducing agents, such as sodium borohydride, citric acid and ethanol. The use of such a wet method is time-consuming and not environmentally friendly. The Pd/C-CP catalyst exhibits the highest activity for formic acid dehydrogenation due to the formation of smaller and highly dispersed Pd nanoparticles, its high concentration of metallic Pd, and its high Pd/C atomic ratio resulting from the migration of the electroneutral Pd species under the Coulomb repulsion effect of electrons in the plasma
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