Open AccessOxygen reduction and hydrogen oxidation reactions on Ru-Fe electrocatalyst synthesized by a microwave-assisted synthesis
Author(s) -
Javier Su-Gallegos,
Lorena Magallón-Cacho,
E. Borja-Arco,
Jesús Garcı́a-Valdés,
P.J. Sebastián
Publication year - 2020
Publication title -
materials research express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 35
ISSN - 2053-1591
DOI - 10.1088/2053-1591/ab7dff
Subject(s) - linear sweep voltammetry , electrocatalyst , cyclic voltammetry , electrochemistry , chemistry , oxygen , redox , hydrogen , oxygen evolution , inorganic chemistry , rotating disk electrode , methanol , voltammetry , scanning electron microscope , electrode , materials science , organic chemistry , composite material
In this work, the oxygen reduction reaction in the absence or presence of 2.0 mol l −1 methanol and the hydrogen oxidation reaction are studied on RuFe electrocatalyst synthesized by a microwave thermal heating method in water as reaction medium. The electrocatalysts were morphologically and structurally typified by scanning electron microscopy and by x-ray diffraction, respectively. Three crystalline phases were found: Ru, Fe 2 O 3 and Fe(OH) 3 ·(H 2 O) x (Bernalite). Functional tests were performed by convective (rotating disk electrode) and non-convective (linear sweep voltammetry and cyclic voltammetry) electrochemical techniques in 0.5 mol l −1 H 2 SO 4 . Both RuFe electrocatalysts show interesting electrochemical activities since they can carry out both the oxygen reduction reaction and the hydrogen oxidation reaction.