Lobo Rui, Ribeiro Jorge, Inok Filipe
Laboratory of Nanophysics/Nanotechnology and Energy (N2E), Center of Technology and Systems (CTS-UNINOVA), Universidade Nova de Lisboa, 2829-516 Caparica, Portugal.
Department of Physics, Nova School of Science & Technology, Nova University of Lisbon, 2829-516 Caparica, Portugal.
Nanomaterials (Basel). 2021 Apr 10;11(4):975. doi: 10.3390/nano11040975.
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.
本文采用了最新的分子束-热脱附光谱技术，用于监测电化学吸氢后碳纳米管网络中氢的吸收和释放。通过这种方式，显著提高信噪比，能够精确测定由这些组件制成的电极中吸收的氢质量。氢脱附质谱说明了电极中氢吸附的表面能力增强，并能够与类似条件下钯电极的性能进行比较。在相似的氢吸收/脱附条件下，对不同碳纳米管电极进行的对比研究，明确证实了对其增强储氢能力的预期，并指出碳纳米管组件在替代重金属合金作为电催化剂方面具有巨大潜力。
