High activity PtPd-WC/C electrocatalyst for hydrogen evolution reaction |
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Authors: | Mei Wu Pei Kang Shen Zidong Wei Shuqin Song Ming Nie |
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Affiliation: | 1. State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University, Guangzhou 510275, PR China;2. School of Chemical Engineering, Chongqing University, Chongqing 400044, PR China |
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Abstract: | Pd modified Pt over a novel support of tungsten carbide nanocrystals (the catalyst denotes as PtPd-WC/C) have been prepared by using an intermittent microwave heating (IMH) method. The as-prepared electrocatalysts are characterized by using the techniques of XRD, SEM, TEM, linear sweeping voltammetry and tested for the hydrogen evolution reaction (HER) in the acidic media. It shows a better performance for the HER on PtPd-WC/C electrocatalyst than that on Pt-WC/C electrocatalyst. In addition, these effects on the catalytic activity by changing environmental temperature and electrolyte concentration were taken into account. Kinetic study shows that the HER on the PtPd-WC/C electrocatalyst gives higher exchange current density in H2SO4 solution with high concentration, leading to a lower overpotential and facile kinetics. XRD, SEM and TEM images of PtPd-WC/C show the crystalline features of Pt, Pd and tungsten carbides and indicated the coexistence of these components. |
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Keywords: | Hydrogen evolution reaction (HER) PtPd-WC/C electrocatalyst Tungsten carbide (WC) Fuel cell |
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