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- Description:
- In this study, nickel felts (Bekipor 2Ni30–0.50, Bekaert) were structured using an ultrashort pulse laser (Carbide CB-3, 40 W; Light Conversion) with a pulse duration of 193 fs, wavelength of 1030 nm, and repetition rate of 100 kHz. The laser was focused using a telecentric F-theta lens with a focal length of 70 mm. The experiments were conducted under three distinct atmospheres: air, argon, and water. The effects of scan speed and fluence were systematically investigated within each atmosphere using confocal laser scanning microscopy (LSM) (Keyence VK-X200 series), scanning electron microscopy (SEM) (Zeiss Sigma 300 VP), and Raman spectroscopy (Renishaw inVia). and The dataset contains light microscopy (LM) images and SEM images of the structured nickel felts, Raman spectra of the surface, and a plot illustrating the change in surface area as a function of medium, scan speed and laser fluence.
- Keyword:
- porous transport layer (PTL), laser ablation, laser-induced periodic surface structure (LIPSS), surface structuring, ultrashort laser pulses (USP), and surface engineering
- Publisher:
- Date Uploaded:
- 2026-02-23
- Date Modified:
- 2026-03-02
- License:
- Creative Commons CC0 1.0 Universal
- Resource Type:
- Collection
- Description:
- The dataset contains a comprehensive list of normalized Raman spectra relevant to ISO 14687:2025. Additionally, the Raman spectrum of hydrogen contaminated by nitrogen at a pressure of 35 MPa is presented.
, The 31 different substances were chosen due to their relevance to ISO 14687:2025. Acquisitions took place at different locations in Germany with a prototype Raman setup, which utilizes a 450 nm laser diode operating with a constant power of 3.5 W. As different sensors were used over the collection phase and the system was recalibrated after changes, the spectra differ in bandwidth as well as in resolution. In addition to the spectra of possible constituents in hydrogen, an exemplary spectrum of hydrogen with approximately 18.6 mmol/mol of nitrogen at a pressure of 35 MPa is shown., For safety reasons and to protect the components of the spectrometer, some gases were diluted either with argon or nitrogen. To increase the signal intensity of diluted samples, the duration of the measurement and/or pressure was varied. This metadata of the spectra contains: The pressure of the gas during acquisition p and the duration of the measurement t. If the sample was diluted, the type of carrier gas and amount of substance (n) in the carrier gas is indicated, as well., When using our dataset in your research, please refer to it as follows:
, and C. R. Günther, L. Appold, P. Adam, A. Stratmann, D. Naglav-Hansen, A. Ostendorf & C. Esen, 2026, Raman spectra of possible impurities in hydrogen relevant to ISO 14687:2025, 2026, ReSeeD Research Data Repository, Research Data Services (RDS) of the Ruhr University Bochum.
- Keyword:
- Raman spectroscopy, High pressure, Trace gas analysis, Quality control, Contaminations, and Hydrogen fuel cells
- Publisher:
- Date Uploaded:
- 2026-01-15
- Date Modified:
- 2026-01-23
- License:
- Creative Commons BY Attribution 4.0 International
- Resource Type:
- Dataset