Figure 2.

(A) iR-corrected cyclic voltammograms (CV) and Tafel plots derived from the CV curves of [Mo₃S₁₃]^2– cluster electrodes prepared using the DMSO solvent via spin-coating; (B) DEMS result of the [Mo₃S₁₃]^2– film electrode during 15 cycles of CV measurements. Each CV cycle was performed from 0.2 to −0.2 V vs RHE with a slow scan rate of 2 mV s^–1 to match the ∼10 s response delay of the mass spectrometer. Note that the small spike appearing at around 83 min is caused by a refreshment of the electrolyte; (C) in situ Raman spectra of a [Mo₃S₁₃]^2– cluster film in the beginning and after EC cycling which stand for the unmeasured electrode as well as for the spectra recorded after 5, 10, and 15 min of CV, respectively.