1. Hydrogen Uptake and Release in Carbon Nanotube Electrocatalysts
- Author
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Filipe Inok, J. H. F. Ribeiro, R. F. M. Lobo, CTS - Centro de Tecnologia e Sistemas, DF – Departamento de Física, and UNINOVA-Instituto de Desenvolvimento de Novas Tecnologias
- Subjects
Materials science ,Hydrogen ,General Chemical Engineering ,carbon nanotube networks ,chemistry.chemical_element ,02 engineering and technology ,Carbon nanotube ,Electrochemistry ,Electrocatalyst ,01 natural sciences ,Article ,law.invention ,hydrogen storage ,lcsh:Chemistry ,Hydrogen storage ,Condensed Matter::Materials Science ,Materials Science(all) ,law ,Desorption ,0103 physical sciences ,electrocatalysis ,desorption spectrometry ,General Materials Science ,010302 applied physics ,021001 nanoscience & nanotechnology ,Desorption spectrometry ,Carbon nanotube networks ,chemistry ,Chemical engineering ,lcsh:QD1-999 ,Electrode ,Chemical Engineering(all) ,Electrocatalysis ,0210 nano-technology ,Palladium - Abstract
The recent technique of molecular beam-thermal desorption spectrometry was used here for monitoring hydrogen uptake and release from carbon nanotube networks, after electrochemical hydrogen uptake. This way, an accurate determination of the hydrogen mass absorbed in electrodes made from those assemblies can be achieved by significantly improving the signal-to-noise ratio. The hydrogen desorption mass spectra account for the enhanced surface capability for hydrogen adsorption in the electrodes and enable a comparison with the performance of a palladium electrode in similar conditions. A comparative study involving different carbon nanotube electrodes, in similar hydrogen uptake/desorption conditions, clearly confirmed the expectations about their enhanced hydrogen storage capacity and points to the great potential of carbon nanotube assemblies in replacing the heavier metal alloys as electrocatalysts. publishersversion published
- Published
- 2021