Hydrogen‐Binding‐Initiated Activation of O−H Bonds on a Nitrogen‐Doped Surface for the Catalytic Oxidation of Biomass Hydroxyl Compounds

Abstract

Hydrogen binding of molecules on solid surfaces is an attractive interaction that can be used as the driving force for bond activation, material-directed assembly,p rotein protection, etc. However,t he lacko faq uantitative characterization method for hydrogen bonds (HBs) on surfaces seriously limits its application. We measured the standardG ibbsf ree energy change (DG 0 )o fo n-surface HBs using NMR. The HBaccepting ability of the surface was investigated by comparing DG 0 values employing the model biomass platform 5-hydroxymethylfurfural on aseries of Co-N-C-n catalysts with adjustable electron-richn itrogen-doped contents.D ecreasing DG 0 improves the HB-accepting ability of the nitrogen-doped surface and promotes the selectively initiated activation of OÀHb onds in the oxidation of 5-hydroxymethylfurfural. As ar esult, the reaction kinetics is accelerated. In addition to the excellent catalytic performance,the turnover frequency (TOF) for this oxidation is muchhigher than for reported non-noblemetal catalysts.

Hydrogen Bond‐Functionalized Massive Solvation Modules Stabilizing Bilateral Interfaces

“…The hydroxyl groups may actually ravage the hydrogen bond network among water molecules and further act on the cation solvated sheath structure. [27,28] Thus, choosing cheap high content saccharides to modulate the solvated shell of zinc ions possesses scientific significance and the possibility of commercial promotion synchronously, when compared to "salt-in-water" electrolytes containing excessive and expensive metal amide salts (see the Experimental Section for the preparation of electrolyte systems, Figures S1 and S2, Tables S1 and S2, Supporting Information). The linear sweep voltammetry demonstrates the concentrated 67Malt/ZS realizes wider range of 2.66 V than that of the baseline electrolyte (1.92 V), especially retards the hydrogen evolution reaction by 573 mV in the cathodic direction (Figure S3, Supporting Information).…”

Structural materials with afterglow room temperature phosphorescence activated by lignin oxidation

“…19 ). According to the literature 39 , hydrogen bonds can induce a decrease of electron density near the hydroxyl proton and deshield the nuclei, resulting in a downfield shift of the hydrogen-bonded protons. The above 1 H NMR results provide direct experimental evidence for the formation of hydrogen bonds between succinic acid and urea.…”

Recent advances in the oxidative esterification of 5-hydroxymethylfurfural to furan-2,5-dimethylcarboxylate

“…44–46 In particular, nitrogen doped carbon materials have the characteristics of low cost, environmental friendliness, corrosion resistance, easy adjustment of structure and physical and chemical properties. 47…”

“…[44][45][46] In particular, nitrogen doped carbon materials have the characteristics of low cost, environmental friendliness, corrosion resistance, easy adjustment of structure and physical and chemical properties. 47 Compared with pure carbon materials, nitrogen doping (I) increases the density of the transition metal electron cloud and improves the electron transport performance of the materials; 48 (II) new nitrogen-containing groups are generated, which can adjust the alkaline sites on the surface of the material; 49 (III) more defect structures benefit the exposure of active sites. 50 Theoretical and experimental studies show that NC and nitrogen sites can be used as nucleation sites of metal nanoparticles, making the materials have unique surface chemical properties and structural stability.…”