Figure 3: Electrocatalytic hydrogen evolution of different catalysts. | Nature Communications

Figure 3: Electrocatalytic hydrogen evolution of different catalysts.

From: An efficient molybdenum disulfide/cobalt diselenide hybrid catalyst for electrochemical hydrogen generation

Figure 3

(a) Polarization curves for HER on bare GC electrode and modified GC electrodes comprising MoS2/CoSe2 hybrid, pure MoS2, pure CoSe2 and a high-quality commercial Pt/C catalyst. Catalyst loading is about 0.28 mg cm−2 for all samples. Sweep rate: 2 mV s−1. (b) Tafel plot for the various catalysts derived from a. (c) Chronoamperometric responses (j~t) recorded on MoS2/CoSe2 hybrid and pure MoS2 at a constant applied potential of −0.7 V vs SCE. The catalysts were deposited on CFP with the same loading of 1 mg cm−2. Inset digital photos show the H2 bubbles formed on MoS2-modified CFP (up) and MoS2/CoSe2-modified CFP (down) at the time point of 20 h. All the measurements were performed in H2-saturated 0.5 M H2SO4 electrolyte. dec, decade.

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