Selective Electrocatalytic H 2 O 2 Generation by Cobalt@N-Doped Graphitic Carbon Core–Shell Nanohybrids
| Autor: | Maurizio Prato, Paolo Fornasiero, Alejandro Criado, Francesco Vizza, Manuela Bevilacqua, Lucia Nasi, Claudio Tavagnacco, Anna Lenarda, Michele Melchionna |
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| Přispěvatelé: | Lenarda, A., Bevilacqua, M., Tavagnacco, C., Nasi, L., Criado, A., Vizza, F., Melchionna, M., Prato, M., Fornasiero, P. |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
N-doped carbon General Chemical Engineering chemistry.chemical_element Nanoparticle hydrogen peroxide 02 engineering and technology cobalt nanoparticle 010402 general chemistry 01 natural sciences Metal chemistry.chemical_compound cobalt nanoparticles core-shell catalysts N-doped carbons oxygen reduction Environmental Chemistry General Materials Science Bulk electrolysis Hydrogen peroxide core–shell catalyst core–shell catalysts Doping 021001 nanoscience & nanotechnology 0104 chemical sciences General Energy chemistry Chemical engineering visual_art visual_art.visual_art_medium Reversible hydrogen electrode 0210 nano-technology Cobalt Faraday efficiency |
| Zdroj: | ChemSusChem (Weinh., Print) 12 (2019): 1664–1672. doi:10.1002/cssc.201900238 info:cnr-pdr/source/autori:Lenarda A.; Bevilacqua M.; Tavagnacco C.; Nasi L.; Criado A.; Vizza F.; Melchionna M.; Prato M.; Fornasiero P./titolo:Selective Electrocatalytic H 2 O 2 Generation by Cobalt@N-Doped Graphitic Carbon Core-Shell Nanohybrids/doi:10.1002%2Fcssc.201900238/rivista:ChemSusChem (Weinh., Print)/anno:2019/pagina_da:1664/pagina_a:1672/intervallo_pagine:1664–1672/volume:12 |
| Popis: | Electrocatalytic oxygen reduction (ORR) is an emerging synthetic strategy to prepare H2 O2 in a sustainable fashion. N-doped graphitic carbon with embedded cobalt nanoparticles was selected as an advanced material able to selectively trigger the ORR to form H2 O2 with a faradaic efficiency of almost 100 % at very positive applied potentials. The production of H2 O2 proceeded with high rates as calculated by bulk electrolysis (49 mmol g-1 h-1 ) and excellent current densities (≈-0.8 mA cm-2 at 0.5 V vs. reversible hydrogen electrode). The totally selective behavior depended on the combination of concomitant material features, such as the textural properties, the nature of the metal, the distribution of N moieties, the acidic environment, and the applied potential. |
| Databáze: | OpenAIRE |
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