Fig. 4: Mechanistic Understanding of MOx@SWNT for OER.
From: The role of carbon catalyst coatings in the electrochemical water splitting reaction
a, b G band positions and ID:IG ratios respectively taken from the 785 nm Raman spectra of Co3O4@SWNT and SWNT. Spectra are taken at potential holds, from 0.9 V to 1.9 V to 0.9 V vs RHE from bottom to top in 0.2 V steps, in N2 saturated 0.1 M KOH. Each data point shown represents the average of 9 spectra collected from a 50 × 50 μm regular array across the modified GC surface. c Electronic density difference after the encapsulation of RuO2@SWNT (11, 11). Blue (yellow) colour represents the depletion (augmentation) of electronic density. d Proposed mechanistic cycle of oxygen evolution reaction on the carbon surface next to encapsulated metal oxide.
