Ruthenium(0) nanoparticles stabilized by metalorganic framework as an efficient electrocatalyst for borohydride oxidation reaction


Kanberoğlu G. S. , Zahmakıran M.

International Journal Of Hydrogen Energy, ss.1-11, 2020 (SCI Expanded İndekslerine Giren Dergi)

Özet

Described herein is a new catalytic material comprising Fe-BTC (Basolite F-300) metalorganic framework stabilized ruthenium nanoparticles (Ru@Fe-BTC) and its notable catalytic activity for the borohydride oxidation reaction (BOR). Ru@Fe-BTC catalyst was
reproducibly prepared by gas-phase infiltration of Ru (cod) (cot) (cod
¼ 1,5-cyclooctadiene
and cot
¼ 1,3,5-cyclooctatriene) precursor followed by hydrogenolysis of the inclusion
compound Ru (cod) (cot)@Fe-BTC to form the Ru@Fe-BTC. The resulting catalytic material
was characterized by using multi-pronged techniques and the sum of their results revealed
the formation of well-dispersed, highly crystalline, and small-sized ruthenium nanoparticles (3.9 nm) within the framework of Fe-BTC by preserving its crystalline structure.
Cyclic and linear scan voltammetry as well as chronoamperometry techniques were used
to assess the catalytic activity and stability of Ru@Fe-BTC for BOR in strongly alkaline
medium at different temperatures (25
e65 C) and sodium borohydride concentrations (0.01
e0.12 M). The charge transfer coefficient was determined to be 0.85 and BOR at Ru@Fe-BTC
was found to be a nearly first-order reaction, with the activation energy amounting to
17 kJ mol
1. A small-scale direct borohydride/peroxide fuel cell that was assembled using
Ru@Fe-BTC as an anodic catalyst delivered a maximum power density of 169 mW cm
2 at
65
C.