Noble-metal-free electrocatalysts toward H2O2 production
The exploration of high-efficiency, robust and low-cost electrocatalysts for the hydrogen peroxide (H2O2) production receives increasing attention due to its key role in developing a new alternative to replace the traditional anthraquinone process. In recent years, significant achievements of non-noble metal electrocatalysts for H2O2 production have been made. Herein, this review presents recent advances of noble-metal-free electrocatalysts toward H2O2 production. Specifically, we first introduce the fundamental principle of on-site electrochemical synthesis of H2O2. Then, the classification and corresponding recent progresses of noble-metal-free electrocatalysts are reviewed, including carbon-based materials (modified by pore structure adjustment, topology defect, heteroatom-doping and surface oxygen functionalization), metal compounds (e.g., NiO, MnO, FeO, Bi2Te3, CoS2), metal single atom catalysts (e.g., Fe, Co, Ni, Mn, Mo) and metal complexes. In parallel, the synthesis strategy, component, structure, electrochemical property and reaction mechanism are highlighted. Finally, the current progresses, challenges, and potential of noble-metal-free electrocatalysts towards H2O2 production are also outlooked.
- This article is part of the themed collection: Journal of Materials Chemistry A Recent Review Articles