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Electrochemical hydrogen storage properties of Ce0.75Zr0.25O2 nanopowders synthesized by sol-gel method
Ist Teil von
Journal of alloys and compounds, 2019-06, Vol.790, p.884-890
Ort / Verlag
Lausanne: Elsevier B.V
Erscheinungsjahr
2019
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
Solid-state hydrogen storage technology currently suffers from issues such as inadequate storage capacity, and instability, leading to low performances. Here we show a record of above 2000 mAh.g−1 (∼7.8 wt% H) of discharge capacity of a binary metal oxides Ce0.75Zr0.25O2 nanopowders. The yellowish Ce0.75Zr0.25O2 nanopowders have been synthesized via a sol-gel method under thermal treatment of the molecular precursors of the, (NH4)2Ce(NO3)6 and C16H40O4Zr. The crystal structure and morphology evolution can be described by the cubic and highly pure structure and homogeneous nanoscales formation of Ce0.75Zr0.25O2, ranging from 35 to 60 nm. The formation of the Ce0.75Zr0.25O2 nanoparticles distinctly matches with the spectroscopy results. The activation energy (Ea) was calculated from the output of a reduction thermal programming profile at about 177 kJ mol−1 using Kissinger equation. Our work will promote the development of low-cost solid-state semiconductors based on transition metals, as a host for hydrogen sorption.
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•Sol-gel technique is utilized for production of Ce0.75Zr0.25O2 nanoparticles.•Nanosized Ce0.75Zr0.25O2 well growth in stearic acid.•Kissinger plot is used to determine the kinetic parameters.•The mixed conductive matrix, and crystalline texture support hydrogen storage ability.•Presence of redox species promoted hydrogen discharge capacities.