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- Title
Cu/C Composite Electrocatalysts for Electrochemical Production of Hydrogen Peroxide.
- Authors
Hu, Junhua; Han, Tao; Liu, Hui; Wang, Xiao Xia
- Abstract
Hydrogen peroxide (H2O 2) is an important chemical with wide fields of applications in the chemical industry, medicine and environmental protection. The preparation of H2O2 by the oxygen reduction reaction (ORR) via the two-electron pathway has the advantages of simple operation and environmental friendliness. Nevertheless, the kinetics of ORR is relatively slow, and the energy efficiency of electrochemical synthesis of H2O2 is seriously limited by the competitive four-electron pathway. Therefore, the electrosynthesis of H2O2 requires an electrocatalyst with both high catalytic activity and selectivity. In this study, Cu nanoparticles supported on carbon composites (Cu/C) were proposed and had been applied as the catalysts for the electrochemical synthesis of H2O2. Taking advantage of the cross-linking reaction between sodium alginate (SA) and metal ions, Cu nanoparticles were directly supported on carbon materials. The porous structure of carbon materials and the introduction of Cu improved the H2O2 selectivity of the catalysts. In O2-saturated 0.1 M KOH, the optimized catalyst exhibited good activity with a selectivity of 88–90% in the potential range of 0.2–0.6 V for the electrosynthesis of H2O2, and the selectivity remained 70% after 6 h of operation. Cu/C composite was synthesized by a simple method of cross-linking reaction between Cu2+ and alginate, and the following heat treatment. The as-prepared Cu/C nanostructure exhibited good electrocatalytic activity for the oxygen reduction reaction through 2e pathway, which provided a promising technical process for the electrochemical production of H2O2.
- Subjects
COPPER; HYDROGEN production; CATALYST selectivity; ELECTROCATALYSTS; HYDROGEN peroxide; OXYGEN reduction; ELECTROSYNTHESIS
- Publication
NANO, 2023, Vol 18, Issue 6, p1
- ISSN
1793-2920
- Publication type
Article
- DOI
10.1142/S1793292023500364