fig3

Figure 3. (A) Two possible reaction pathways for HMF electrooxidation; (B and C) Concentration changes of the reactant and products during HMFOR at 1.45 V; (D and E) In situ Raman spectra of HMFOR process on CoFe PBA-CF and CoFe PBA/CF sample; (F) Illustration of transformation of electrocatalyst and the electrooxidation of HMF on reactive sites. HMF: 5-hydroxymethylfurfural; HMFOR: 5-hydroxymethylfurfural electrocatalytic oxidation reaction; CoFe PBA/CF: Cu-supported CoFe Prussian blue analogue.