Design of Self-Supported Flexible Nanostars MFe-LDH@ Carbon Xerogel-Modified Electrode for Methanol Oxidation
Metadatos
Mostrar el registro completo del ítemAutor
Abdelrazek, Ghada M.; EL-Deeb, Mohamed M.; Farghali, Ahmed A.; Pérez Cadenas, Agustín Francisco; Abdelwahab, AbdallaEditorial
MDPI
Materia
Fuel cells Particle size Methanol oxidation Carbon xerogels
Fecha
2021Referencia bibliográfica
Abdelrazek, G.M.; EL-Deeb, M.M.; Farghali, A.A.; Pérez-Cadenas, A.F.; Abdelwahab, A. Design of Self-Supported Flexible Nanostars MFe-LDH@ Carbon Xerogel-Modified Electrode for Methanol Oxidation. Materials 2021, 14, 5271. https://doi.org/10.3390/ ma14185271
Patrocinador
Beni-Suef University - BSU-CP7-19010.Resumen
Layered double hydroxides (LDHs) have emerged as promising electrodes materials for
the methanol oxidation reaction. Here, we report on the preparation of different LDHs with the
hydrothermal process. The effect of the divalent cation (i.e., Ni, Co, and Zn) on the electrochemical
performance of methanol oxidation was investigated. Moreover, nanocomposites of LDHs and
carbon xerogels (CX) supported on nickel foam (NF) substrate were prepared to investigate the role
of carbon xerogel. The results show that NiFe-LDH/CX/NF is an efficient electrocatalyst for methanol
oxidation with a current density that reaches 400 mA·m−2
compared to 250 and 90 mA·cm−2
for
NiFe-LDH/NF and NF, respectively. In addition, all LDH/CX/NF nanocomposites show excellent
stability for methanol oxidation. A clear relationship is observed between the electrodes crystallite
size and their activity to methanol oxidation. The smaller the crystallite size, the higher the current
density delivered. Additionally, the presence of carbon xerogel in the nanocomposites offer 3D
interconnected micro/mesopores, which facilitate both mass and electron transport.