Substrate molecule adsorption energy: An activity descriptor for electrochemical oxidation of 5-Hydroxymethylfurfural (HMF)

Efficient Electrocatalytic Oxidation of Glycerol via Promoted OH* Generation over Single-Atom-Bismuth-Doped Spinel Co3O4

“…For example, Jin et al reported a GOR activity trend for a series of cobalt-based spinel electrocatalysts (MCo 2 O 4 ), among which CuCo 2 O 4 realized high formic acid selectivity of 80.6% . However, it remains challenging to establish a clear structure–property relationship for spinel-based electrocatalysts in GOR largely due to the complexities of active sites (Td and Oh sites) and coadsorptions of all reaction species (glycerol, intermediates, and reactive oxygen species), which are necessary to be taken into consideration …”

“…19 However, it remains challenging to establish a clear structure− property relationship for spinel-based electrocatalysts in GOR largely due to the complexities of active sites (Td and Oh sites) and coadsorptions of all reaction species (glycerol, intermediates, and reactive oxygen species), which are necessary to be taken into consideration. 20 In the past years, single-atom catalysts (SACs) with atomically dispersed active sites have gained great attention for high atom utilizations and unique catalytic activities. 21−26 It is reported that single atoms as dopants could dramatically improve the catalytic performance.…”

“…The following two nucleophilic oxidation reactions of GLAD with OH* (steps 9−12) produce GCA, which undergoes C−C cleavage by hydration (step 13), and then generates formate and the gem-diol form of glycol. The gem-diol form of glycol undergoes OH* generation (steps 15−17) and nucleophilic oxidation reactions to form GLA (step 16) and GOA (step 18), and finally produce two formate molecules through C−C cleavage (steps19,20). The calculated reaction mechanism for Co 3 O 4 follows a similar reaction pathway, with the difference that the adsorption site of Co 3 O 4 for glycerol alkoxide is the bridge site between two adjacent Co Oh 3+ atoms.…”

Unveiling the Adsorption Behavior and Redox Properties of PtNi Nanowire for Biomass-Derived Molecules Electrooxidation

“…The reasonable explanation is that it is difficult for HMF to adsorb on NiO, while the adsorption of HMF on the Pt site is too strong. The Ni in Pt x Ni 100−x NWs could reduce the binding energy of Pt and therefore modulate the adsorption behavior of HMF during HMFOR, giving rise to optimal adsorption energy.The open circuit potential (OCP), which exhibits the variation of absorbates in the Helmholtz layer, was measured to investigate the adsorption behavior of HMF 41,42. When the HMF was injected into the electrolyte, the decreased OCP on the Pt electrode, NiO, and Pt 26 Ni 74 NWs was 0.64, 0.25, and 0.33 V, respectively, revealing the order of HMF absorption strength is as follows: Pt > Pt 26 Ni 74 NWs > NiO (Figure 3d).…”

CuxCo3–xO4 Spinel Nanofibers for Selective Oxidation of 5-Hydroxymethylfurfural into Fuel Additives

“…The biomass platform resource conversion based on an efficient catalytic approach has been gradually replacing the production method of traditional petrochemical products. 5-Hydroxymethylfurfural (HMF), as one of the acknowledged lignin derivatives with a high added value, can be converted into 2,5-furandicarboxylic acid (FDCA) through oxidation. − FDCA is a crucial biobased precursor of polyethylene furanoate (PEF), which is an alternative for petroleum-based compounds; , the production process of FDCA from HMF has great potential as a green strategy to obtain value-added chemicals. The critical challenge in this field is finding an environmentally friendly and efficient route, and electrocatalytic oxidation of HMF has received growing attention recently due to the advantages of mild reaction conditions, kinetics, and high selectivity.…”