Work

One-Step Carbonization of Monosaccharide and Dicyandiamide to Oxygen and Nitrogen Co-Doped Carbon Nanosheets for Electrocatalytic O2 Reduction to H2O2

Year: 2025

Type: article

Abstract: Electrocatalytic reduction of O2 via two-electron reaction to H2O2 represents a promising alternative to the current anthraquinone process. Herein, we report the development of oxygen and nitrogen-rich few-layered graphene-like materials (ms-dcda) by one-step carbonization of biomass-sourced monosaccharides with the aid of dicyandiamide for electrochemical O2 reduction to H2O2. The ms-dcda materials were porous and possessed wrinkled morphology typical of graphene nanosheets.These ms-dcda materials were all active and stable catalysts, among which glu-dcda derived from D-glucose and dicyandiamide displayed the lowest onset potential of 0.553 V and the highest selectivity up to 91.6%. Selective chemical titration of the C–OH and C=O groups revealed that the latter is far more active and selective than the former in 2e-ORR. Moreover, a positive correlation between the contents of C=O and pyrrolic N and the H2O2 partial current suggests that the pyrrolic N group also contributes to 2e-ORR.

Source: Catalysts

DOI: 10.3390/catal15050459