Fig. 4: Strong interfacial binding force and small electrocatalyst-gas bubble interfacial adhesion force. | Nature Communications

Fig. 4: Strong interfacial binding force and small electrocatalyst-gas bubble interfacial adhesion force.

From: Dual interfacial engineering of a Chevrel phase electrode material for stable hydrogen evolution at 2500 mA cm−2

Fig. 4

a Force analysis model of gas bubbles attached on the electrode. Fa, Fb, and G represent the electrocatalyst-bubble interfacial adhesion force, the electrocatalyst-support interfacial binding force, and the gravity of electrocatalysts, respectively. b The photos of micro-scratches of CuMo6S8 (top), Pt/C (bottom) catalyst layers adhesive on Cu foils. The dotted lines represent the critical adhesive forces corresponding catalysts. c The statistical data of critical adhesive forces of CuMo6S8 and Pt/C. The error bars represent the statistical distribution of three samples. The photos of gas bubbles generated on d CuMo6S8 and e Pt/C electrodes at 10 mA cm−2. The insets show the corresponding contact angles of ~0° and 81.3°. f Evolution rate and diameter of gas bubbles of CuMo6S8 and Pt/C electrodes. The error bars represent the distribution of statistical values. g Electrocatalyst-bubble interfacial adhesion force of CuMo6S8/Cu and Pt/C electrodes.

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