Electrocatalytic oxygen reduction (ORR) is an emerging synthetic strategy to prepare H2O2 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 H2O2 with a faradaic efficiency of almost 100 % at very positive applied potentials. The production of H2O2 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.

Selective Electrocatalytic H 2 O 2 Generation by Cobalt@N-Doped Graphitic Carbon Core–Shell Nanohybrids

Lenarda A.;Tavagnacco C.;Criado A.;Melchionna M.
;
Prato M.
;
Fornasiero P.
2019-01-01

Abstract

Electrocatalytic oxygen reduction (ORR) is an emerging synthetic strategy to prepare H2O2 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 H2O2 with a faradaic efficiency of almost 100 % at very positive applied potentials. The production of H2O2 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.
2019
13-feb-2019
Pubblicato
https://onlinelibrary.wiley.com/doi/full/10.1002/cssc.201900238
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2954425
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