Evaluation of hydrogen storage performance of ZrTiVNiCrFe in electrochemical and gas-solid reactions
| Autor: | Vladislav Yu. Zadorozhnyy, E. A. Berdonosova, Alice Lassnig, Mikhail Zadorozhnyy, Sergey V. Ketov, Tolga Karazehir, Christoph Gammer, Baran Sarac, Semen N. Klyamkin, Jürgen Eckert |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Alloy Energy Engineering and Power Technology Sorption 02 engineering and technology engineering.material Laves phase 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences 0104 chemical sciences Dielectric spectroscopy Hydrogen storage Fuel Technology Chemical engineering Desorption engineering Cyclic voltammetry 0210 nano-technology |
| Zdroj: | International Journal of Hydrogen Energy. 45:5347-5355 |
| ISSN: | 0360-3199 |
| Popis: | In the present study, the hydrogen storage performance of multi-principal-component ZrTiVNiCrFe alloy produced through rapid solidification has been examined by electrochemical methods and gas-solid reactions. XRD and EBSD analyses reveal the hexagonal Laves phase structure (type C14) with average grain size of 300 nm and root-mean-square microstrain of 0.19%. Cyclic voltammetry and electrochemical impedance spectroscopy analyses in the hydrogen sorption/desorption region give insight to the sorption/desorption kinetics and the change in the desorption charge in terms of the applied potential. The pressure-composition isotherms measured in course of gas-solid reaction confirm the hydrogen storage capacity reaching 1.6 wt% at the first hydrogenation at room temperature, then reducing to 1.3–1.4% during subsequent cycling. According to the calorimetric titration study, there is a significant hysteresis primarily caused by the non-equilibrium character of the hydrogenation process. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect