1. High surface area N/O co-doped carbon materials: Selective electrocatalysts for O2 reduction to H2O2
- Author
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Chia-Min Yang, Claudio Tavagnacco, En Chen, Paolo Fornasiero, Tiziano Montini, Manuela Bevilacqua, Chen, E., Bevilacqua, M., Tavagnacco, C., Montini, T., Yang, C. -M., and Fornasiero, P.
- Subjects
Electrocatalysis ,H2O2 ,production ,N/O co-coped carbon ,Selective 2-electron reduction ,Materials science ,chemistry.chemical_element ,Context (language use) ,02 engineering and technology ,010402 general chemistry ,Electrochemistry ,01 natural sciences ,Catalysis ,H2O2 production ,chemistry.chemical_compound ,Hydrogen peroxide ,Porosity ,Dopant ,Electrocatalysi ,General Chemistry ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,chemistry ,Chemical engineering ,0210 nano-technology ,Selectivity ,Carbon - Abstract
The search for a sustainable process for production of hydrogen peroxide (H2O2) is receiving a great attention in the last years in view of its possible use as a clean oxidant in the chemical industry or for decontamination of water streams. In this context, the electrochemical approach is particularly interesting, since it can use electricity produced from solar light through photovoltaic panels. H2O2 can be produced by selective 2-electron reduction of O2 from air, but the efficiency of this process is strongly limited by possible concomitant 4-electron reduction to H2O. Graphitic carbon materials have been reported as selective electrocatalysts in 2-electron O2 reduction, with recognized as active sites for the process. In this work, we present the preparation of high surface area graphitic carbons containing O and N as dopants, with optimal porosity and tunable composition depending on the molar ratio of the molecular precursors employed in the preparation. We observed that a tiny amount of N within the material can improve the selectivity to H2O2, without significant loss of performances. The addition of Cu nanoparticles deeply changes the selectivity of the systems, favoring the O2 reduction to H2O with a very low selectivity to H2O2.
- Published
- 2019
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