Fig. 5: Experimental evidences for hydrogen spillover. | Nature Communications

Fig. 5: Experimental evidences for hydrogen spillover.

From: Hydrogen spillover in complex oxide multifunctional sites improves acidic hydrogen evolution electrocatalysis

Fig. 5

a The Liner plot of log |j | at −0.03 V (vs. RHE) vs. pH. b CV profiles of La2Sr2PtO7+δ catalyst with the scan rate from 50 to 850 mV s−1 in Ar-saturated 0.5 M H2SO4. c Plots of hydrogen desorption peak position vs. scan rates of the Pt black, Pt/WO3 and La2Sr2PtO7+δ catalysts. d Nyquist plot for La2Sr2PtO7+δ catalyst at various HER overpotentials. The scattered symbol represents the experimental results, and the solid lines is simulated fitting results. The inset also shows the equivalent circuit for the simulation. e EIS-derived Tafel plots of the Pt black, Pt/WO3 and La2Sr2PtO7+δ catalysts obtained from the hydrogen adsorption resistance R2. f Polarization curves of La2Sr2PtO7+δ catalyst in aqueous 0.5 M H2SO4 and 0.5 M D2SO4 solutions. The inset is the kinetic isotope effect value vs. potential.

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