Electrochemical reduction of Bicarbonate to Formate with Silver Nanoparticles and Silver Nanoclusters supported on Multiwalled Carbon Nanotubes
Por:
Arrocha-Arcos, A. A., Cervantes-Alcala, R., Huerta-Miranda, G. A., Miranda-Hernandez, M.
Publicada:
20 ago 2017
Resumen:
In this work, we report heterogeneous catalysis of bicarbonate reduction
to formate (FA) using silver nanoparticles (Ag NP) and silver
nanoclusters (Ag NC) supported on multi-wall carbon nanotubes (MWCNT).
FA detection was performed by substrate generation/tip collection
(SG/TC) mode of scanning electrochemical microscopy (SECM) using Pt UME
in 100 mM HCO3 at pH 8. The Ag NP and Ag NC showed high carbonate
reduction current, and similar activity as massive gold electrode
targets them as alternative catalysts for FA production. Prior to
bicarbonate reduction, the electrochemical activity of Ag NP and Ag NC
was evaluated using carbon fiber ultra microelectrodes (UME), these
carbon UME were fabricated and characterized for use in SCEM mapping;
carbon UME provided an excellent feedback response and are dispensable
electrodes with renewable surfaces. Also, a carbon UME enables the
fabrication of an enzymatic sensor which was designed for NAD(+)
(Nicotine amide dinucleotide) dependent formate dehydrogenase
immobilization. The enzymatic reaction coupled with the redox mediator
2,2V-Azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) allowed a
sensitive FA detection. The production of FA on silver particles and the
FA detection methods presented in this work will be the target of
further investigation for energy storage molecules. (C) 2017 Elsevier
Ltd. All rights reserved.
Filiaciones:
Arrocha-Arcos, A. A.:
Instituto de Energías Renovables-Universidad Nacional Autónoma de México, Priv. Xochicalco, Temixco, Morelos, Mexico
Univ Nacl Autonoma Mexico, Inst Energias Renovables, Temixco 62580, Morelos, Mexico
Cervantes-Alcala, R.:
Instituto de Energías Renovables-Universidad Nacional Autónoma de México, Priv. Xochicalco, Temixco, Morelos, Mexico
Univ Nacl Autonoma Mexico, Inst Energias Renovables, Temixco 62580, Morelos, Mexico
Huerta-Miranda, G. A.:
Instituto de Energías Renovables-Universidad Nacional Autónoma de México, Priv. Xochicalco, Temixco, Morelos, Mexico
Univ Nacl Autonoma Mexico, Inst Energias Renovables, Temixco 62580, Morelos, Mexico
Miranda-Hernandez, M.:
Instituto de Energías Renovables-Universidad Nacional Autónoma de México, Priv. Xochicalco, Temixco, Morelos, Mexico
Univ Nacl Autonoma Mexico, Inst Energias Renovables, Temixco 62580, Morelos, Mexico
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