Title
N-doped ordered mesoporous carbons prepared by a two-step nanocasting strategy as highly active and selective electrocatalysts for the reduction of <tex>$O_{2}$</tex> to <tex>$H_{2}O_{2}$</tex> N-doped ordered mesoporous carbons prepared by a two-step nanocasting strategy as highly active and selective electrocatalysts for the reduction of <tex>$O_{2}$</tex> to <tex>$H_{2}O_{2}$</tex>
Author
Faculty/Department
Faculty of Sciences. Physics
Faculty of Applied Engineering Sciences
Publication type
article
Publication
Amsterdam ,
Subject
Physics
Chemistry
Engineering sciences. Technology
Source (journal)
Applied catalysis : B : environmental. - Amsterdam
Volume/pages
176(2015) , p. 212-224
ISSN
0926-3373
ISI
000356549200022
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
A new, two-step nanocasting method was developed to prepare N-doped ordered mesoporous carbon (NOMC) electrocatalysts for the reduction of O2 to H2O2. Our strategy involves the sequential pyrolysis of two inexpensive and readily available N and C precursors, i.e. aniline and dihydroxynaphthalene (DHN), inside the pores of a SBA-15 hard silica template to obtain N-doped graphitic carbon materials with well-ordered pores and high surface areas (764 and 877 m2g−1). By tuning the ratio of carbon sources to silica template, it was possible to achieve an optimal filling of the pores of the SBA-15 silica and to minimise carbon species outside the pores. These NOMC materials displayed outstanding electrocatalytic activity in the oxygen reduction reaction, achieving a remarkably enhanced kinetic current density compared to state-of-the-art N-doped carbon materials (−16.7 mA cm−2 at −0.35 V vs. Ag/AgCl in a 0.1 M KOH solution as electrolyte). The NOMC electrocatalysts showed high selectivity toward the two-electron reduction of oxygen to hydrogen peroxide and excellent long-term stability.
E-info
https://repository.uantwerpen.be/docman/iruaauth/4bc244/67f338057c2.pdf
Full text (open access)
https://repository.uantwerpen.be/docman/irua/310d01/9921.pdf
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