MXene-containing composite electrodes for hydrogen evolution: Material design aspects and approaches for electrode fabrication
| Autor: | Marta C. Ferro, Nataliya Yu. Tabachkova, Viacheslav I. Shkepu, Andrei V. Kovalevsky, Hanna Pazniak, Obid Tursunov, Nataliya D. Shchaerban, Enrique Rodríguez Castellón, Daniela V. Lopes, Jorge R. Frade, Sergii A. Sergiienko, Gabriel Constantinescu |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Composite number Energy Engineering and Power Technology Electrocatalysts 02 engineering and technology Material Design Active surface 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences 0104 chemical sciences Fuel Technology Chemical engineering Nickel Etching Phase (matter) Electrode Hydrogen evolution MXene 0210 nano-technology |
| Zdroj: | International Journal of Hydrogen Energy. 46:11636-11651 |
| ISSN: | 0360-3199 |
| Popis: | This work explores the possibilities for the processing of Ni- and Ti3C2Tx (T = OH, O) MXene-containing composite electrodes, by co-pressing and plastic deformation or by etching of the electrodes prepared directly by self-propagation high-temperature synthesis (SHS). Various material design approaches were also explored. In order to tune the Ti3C2 interlayer distance in Ti3C2Al MAX phase, an introduction of additional Al to form Ti3C2Alz materials with z > 1 was attempted. Self-propagation high-temperature synthesis of powder mixtures with extra Ni and Al content (e.g. Ni:Ti:Al:C = 1:2:3:1) resulted in SHS products containing Ti3C2Alz z > 1 material and Ni–Al alloys. Further etching of these products in 10M NaOH allowed the direct formation of electrodes with active surface containing Ti3C2Tx (T = OH, O) MXene- and Raney nickel-containing composites. The electrochemical studies were focused on hydrogen evolution and showed the potential for boosting the electrochemical reaction in Ni and MXene-containing composite electrodes, especially at high current densities. The guidelines for the processing of such electrodes under fluorine-free conditions are proposed and discussed. |
| Databáze: | OpenAIRE |
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