Ultrathin layered double hydroxides nanosheets array towards efficient electrooxidation of 5-hydroxymethylfurfural coupled with hydrogen generation

High oxidation state enabled by plated Ni-P achieves superior electrocatalytic performance for 5-hydroxymethylfurfural oxidation reaction

“…( Liao et al., 2020 ). However, single metal catalysts of Au, Pt, and Pd were not particularly selective for the final product FDCA, and the focus was later shifted toward transitional metal catalysts including Ni, Co, Fe, and Cu inspired by the water-splitting process ( Deng et al., 2020b ; Nam et al., 2018 ; Song et al., 2021 ; Zhang et al., 2020 ). Meanwhile, there have been studies using 2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPO) or its derivative as the mediator and noble metals (Au, Ag, etc.)…”

Grain-boundary-rich layered double hydroxides via a boron-assisted strategy for the oxygen evolution reaction

“…11 For the NiFe LDHs, it was also reported the unsaturated Fe-sites and the bridge-sites connecting Ni and Fe atoms that only exist on the edge planes should be the main active centres for the OER. 11 Besides, metal vacancies 14,17 and oxygen vacancies 14,18 have also been confirmed as the active sites of LDHs. Interestingly, grain boundaries (GBs) have recently attracted attention as promising active sites in electrochemical processes, 18–21 which can alter the binding energy of the intermediates and further accelerate the reaction.…”

“…11 Besides, metal vacancies 14,17 and oxygen vacancies 14,18 have also been confirmed as the active sites of LDHs. Interestingly, grain boundaries (GBs) have recently attracted attention as promising active sites in electrochemical processes, 18–21 which can alter the binding energy of the intermediates and further accelerate the reaction. 22 However, the control of GBs in LDHs for the OER has been rarely reported.…”

Biomass upgrading coupled with H2 production via a nonprecious and versatile Cu-doped nickel nanotube electrocatalyst

“…To date, a large variety of bifunctional electrocatalysts have been developed for the ECO of HMF and the HER, especially the earth's abundant transition metal based compounds including oxides/hydroxides, phosphides, nitrides and suldes. [12][13][14][15][16] You et al presented that the cell voltage can be greatly reduced by $200 mV over Ni 3 S 2 /NF catalysts by integrating ECO of HMF (10 mM) with decoupled H 2 production. 14 Later, they developed a porous Ni-based bifunctional electrocatalyst (hp-Ni) and the potential for a coupled hybrid electrolyzer was reduced by $250 mV compared to that of water splitting to deliver a current density of 50 mA cm À2 .…”