Pt loaded on activated Phosphorus-doped graphene catalyst with superior catalytic performance for Hydrogen Evolution Reaction
발표자
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초록
내용
The hydrogen production through water splitting is an eco-friendly. In this process, catalysts with excellent HER activities and good stability are required. However, most of the catalysts contained precious metal, which have problems such as high cost and low durability. In this work, we prepared phosphorus-doped graphene (PGnP) by using the mechanochemical reaction between the pristine graphite and P2O5. And then, PGnP was activated at 900℃ for 1h under CO2 to increase specific surface area and porosity for boosting the mass transfer of catalyst. A small amount of Pt nanoparticles were loaded on activated Ac_PGnP by using chemical reduction. The Pt/Ac_PGnP and Pt/C exhibited an overpotential of 30 and 34 mV at a current density of 10 mA cm-2, respectively. Ac_PGnP had numerous active sites as well as the incorporation of P into the carbon matrix improved the performance of HER. As a result, Pt/Ac_PGnP electrocatalyst is valuable as enhancing and more stable catalyst in acidic media.