Fig. 4: Characterization of AA oxidation products.
From: Acidic enol electrooxidation-coupled hydrogen production with ampere-level current density
a IR spectrum and b NMR spectrum for AA with different oxidation times in 1 M AA solution. c Yield rates of DHA at different reaction times. d Gibbs free energy diagram for different metals at a potential of U = 0 V. e Mechanism of AA reaction. M(Fe, Cu, Co, Ni) and HA- refer to metal and the dissociation of a hydrogen from AA, respectively. M-HA presents HA- adsorbed on metal. M-A- • means M-HA lost a proton and an electron.
