Jump to main content
Jump to site search


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

Author affiliations

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.

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

Back to tab navigation

Publication details

The article was received on 26 Apr 2019, accepted on 03 Aug 2019 and first published on 06 Aug 2019


Article type: Paper
DOI: 10.1039/C9NJ02148E
New J. Chem., 2019, Advance Article

  •   Request permissions

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

    J. Milikić, R. C. P. Oliveira, I. Stoševski, J. Krstić, R. Hercigonja, Š. Miljanić, D. M. F. Santos and B. Šljukić, New J. Chem., 2019, Advance Article , DOI: 10.1039/C9NJ02148E

Search articles by author

Spotlight

Advertisements