Cationic vacancies accelerate the generation of CoOOH in perovskite hydroxides for the electrooxidation of biomass

Abstract

The electrocatalytic oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid is an environmentally friendly strategy for enhancing biomass energy. Defect engineering has been demonstrated as a promising strategy for increasing the catalytic...

Selective electrooxidation of 5-hydroxymethylfurfural at low working potentials promoted by 3D hierarchical Cu(OH)2@Ni3Co1-layered double hydroxide architecture with oxygen vacancies

“…S14c † ), the binding energy of Co in Re-CF/Cu(OH) 2 @Ni 3 Co 1 -LDH significantly shifts to lower binding energy compared with that of CF/Cu(OH) 2 @Ni 3 Co 1 -LDH, which can be assigned to the formation of CoOOH that has been reported to be the direct active mediator in the oxidation reaction. 61 In the O 1s region (Fig. S14d † ), the concentration of Vo decreased after the electrooxidation, suggesting that Vo as an important role were involved in the electrooxidation of HMF.…”

Electrocatalytic hydrogenation coupling oxidation using water in a highly efficient paired cell enabled by an oxygen defect-rich layered double hydroxide

“…62–64 To take full advantage of the water oxidation reaction at the anode during p -NP reduction at the cathode, we selected the oxidation of HMF to FDCA as the anode reaction in a paired electrochemical cell experiment. FDCA is an important pharmaceutical and chemical intermediate, 65–67 justifying the use of the conversion of HMF to FDCA as the anode reaction in our paired electrochemical cell.…”

The progress of research on vacancies in HMF electrooxidation

“…The presence of these vacancies caused a 200 mV shift in the oxidation potential of HMFOR at the same current density ( Figure 3D ). Consequently, both the yield and Faraday efficiency were enhanced compared to the original configuration ( Figure 3E ) ( Peng et al, 2023 ). Lu et al (2020) enriched the abundance of defect-rich interface sites within three-dimensional layered nanostructured NiO-Co 3 O 4 electrocatalysts and explored their catalytic efficacy for HMF electrooxidation.…”

“… (A) The scheme of the relationship between electrocatalyst evolution and potential; (B) EPR spectra of V Mo -NiO x H y and NiO x H y ( Jiang et al, 2024 ); (C) EPR spectra of SnCo(OH) 6 and SnCo(OH) 6 -V Sn ; (D) LSV curves for SnCo(OH) 6 and SnCo(OH) 6 -V Sn in 1 M KOH with 50 mM HMF; (E) yield and FE of FDCA at 1.47 V RHE for SnCo(OH) 6 and SnCo(OH) 6 -V Sn ( Peng et al, 2023 ). …”