Evaluation of silver-incorporating zeolites as bifunctional electrocatalysts for direct borohydride fuel cells

Milikić, Jadranka; Oliveira, Raisa C. P.; Stoševski, Ivan; Krstić, Jugoslav; Hercigonja, Radmila; Miljanić, Šćepan; Santos, Diogo M. F.; Šljukić, Biljana

doi:10.1039/c9nj02148e

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2019

Authors

Milikić, Jadranka

Oliveira, Raisa C. P.
Stoševski, Ivan
Krstić, Jugoslav

Hercigonja, Radmila
Miljanić, Šćepan
Santos, Diogo M. F.
Šljukić, Biljana

Article (Published version)

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Abstract

Three zeolites (A, X and Y) with Ag incorporated in their cages are tested as bifunctional electrocatalysts for direct borohydride fuel cells (DBFCs). Ag zeolites are characterised by XRD, FTIR, nitrogen sorption and SEM, as well as by electrochemical methods. Ag zeolite shows good activity for the anodic reaction, i.e., borohydride oxidation reaction (BOR) in alkaline media, presenting low onset potential and high current densities. BOR kinetic and faradaic parameters at AgY are calculated, with the number of exchanged electrons being 4.3. The BOR at AgY was found to be of 0.6 order with respect to BH4 concentration with an activation energy of 13 kJ mol 1. Regarding ORR, AgX shows the best performance with the highest current densities and good stability over time. A two-electron pathway is observed for ORR at AgX and specific capacitance was calculated to be 5.61 F g 1. The DBFC performance is investigated based on half-cell measurements of the AgY anode and Pt/C cathode

Keywords:

direct borohydride fuel cells (DBFC) / Electrocatalysists / borohydride oxidation / oxigen reduction / sodium-borohydride / polycrystalline silver / catalytic-activity / direct oxidation / anodic behavior / part I / AG / performance / electrodes

Source:
New Journal of Chemistry, 2019, 43, 36, 14270-14280

Publisher:

Royal Society of Chemistry

Funding / projects:

Electroconducting and redox-active polymers and oligomers: synthesis, structure, properties and applications (RS-172043)
Lithium-ion batteries and fuel cells - research and development (RS-45014)
PhD grant SFRH/BD/ 137470/2018 (R. C. P. Oliveira).
Fundaçao para a Ciencia e a Tecnologia (FCT, Portugal) for contract no. IF/01084/2014/CP1214/CT0003 under IF2014 Programme (D. M. F. Santos), no. IST-ID/156-2018 (B.Šljukić)

DOI: 10.1039/c9nj02148e

ISBN: 1369-9261

ISSN: 1144-0546

WoS: 000486223200005

Scopus: 2-s2.0-85072338843

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	6

TY - JOUR
AU - Milikić, Jadranka
AU - Oliveira, Raisa C. P.
AU - Stoševski, Ivan
AU - Krstić, Jugoslav
AU - Hercigonja, Radmila
AU - Miljanić, Šćepan
AU - Santos, Diogo M. F.
AU - Šljukić, Biljana
PY - 2019
UR - https://cer.ihtm.bg.ac.rs/handle/123456789/3317
AB - Three zeolites (A, X and Y) with Ag incorporated in their cages are tested as bifunctional electrocatalysts
for direct borohydride fuel cells (DBFCs). Ag zeolites are characterised by XRD, FTIR, nitrogen sorption
and SEM, as well as by electrochemical methods. Ag zeolite shows good activity for the anodic reaction,
i.e., borohydride oxidation reaction (BOR) in alkaline media, presenting low onset potential and high
current densities. BOR kinetic and faradaic parameters at AgY are calculated, with the number of
exchanged electrons being 4.3. The BOR at AgY was found to be of 0.6 order with respect to BH4

concentration with an activation energy of 13 kJ mol 1. Regarding ORR, AgX shows the best
performance with the highest current densities and good stability over time. A two-electron pathway is
observed for ORR at AgX and specific capacitance was calculated to be 5.61 F g 1. The DBFC
performance is investigated based on half-cell measurements of the AgY anode and Pt/C cathode
PB - Royal Society of Chemistry
T2 - New Journal of Chemistry
T1 - Evaluation of silver-incorporating zeolites as bifunctional electrocatalysts for direct borohydride fuel cells
VL - 43
IS - 36
SP - 14270
EP - 14280
DO - 10.1039/c9nj02148e
ER -

@article{
author = "Milikić, Jadranka and Oliveira, Raisa C. P. and Stoševski, Ivan and Krstić, Jugoslav and Hercigonja, Radmila and Miljanić, Šćepan and Santos, Diogo M. F. and Šljukić, Biljana",
year = "2019",
abstract = "Three zeolites (A, X and Y) with Ag incorporated in their cages are tested as bifunctional electrocatalysts
for direct borohydride fuel cells (DBFCs). Ag zeolites are characterised by XRD, FTIR, nitrogen sorption
and SEM, as well as by electrochemical methods. Ag zeolite shows good activity for the anodic reaction,
i.e., borohydride oxidation reaction (BOR) in alkaline media, presenting low onset potential and high
current densities. BOR kinetic and faradaic parameters at AgY are calculated, with the number of
exchanged electrons being 4.3. The BOR at AgY was found to be of 0.6 order with respect to BH4

concentration with an activation energy of 13 kJ mol 1. Regarding ORR, AgX shows the best
performance with the highest current densities and good stability over time. A two-electron pathway is
observed for ORR at AgX and specific capacitance was calculated to be 5.61 F g 1. The DBFC
performance is investigated based on half-cell measurements of the AgY anode and Pt/C cathode",
publisher = "Royal Society of Chemistry",
journal = "New Journal of Chemistry",
title = "Evaluation of silver-incorporating zeolites as bifunctional electrocatalysts for direct borohydride fuel cells",
volume = "43",
number = "36",
pages = "14270-14280",
doi = "10.1039/c9nj02148e"
}

Milikić, J., Oliveira, R. C. P., Stoševski, I., Krstić, J., Hercigonja, R., Miljanić, Š., Santos, D. M. F.,& Šljukić, B.. (2019). Evaluation of silver-incorporating zeolites as bifunctional electrocatalysts for direct borohydride fuel cells. in New Journal of Chemistry
Royal Society of Chemistry., 43(36), 14270-14280.
https://doi.org/10.1039/c9nj02148e

Milikić J, Oliveira RCP, Stoševski I, Krstić J, Hercigonja R, Miljanić Š, Santos DMF, Šljukić B. Evaluation of silver-incorporating zeolites as bifunctional electrocatalysts for direct borohydride fuel cells. in New Journal of Chemistry. 2019;43(36):14270-14280.
doi:10.1039/c9nj02148e .

Milikić, Jadranka, Oliveira, Raisa C. P., Stoševski, Ivan, Krstić, Jugoslav, Hercigonja, Radmila, Miljanić, Šćepan, Santos, Diogo M. F., Šljukić, Biljana, "Evaluation of silver-incorporating zeolites as bifunctional electrocatalysts for direct borohydride fuel cells" in New Journal of Chemistry, 43, no. 36 (2019):14270-14280,
https://doi.org/10.1039/c9nj02148e . .