The surface/interface reflection absorption infrared spectroscopy (IRFEL-RAS) experimental station leverages the high energy and tunability advantages of infrared free-electron laser sources to extend the detection range into the far-infrared region. This overcomes the limitations of traditional infrared sources in the far-infrared, such as low photon flux and poor spectral signal-to-noise ratio, demonstrating strong potential for high-sensitivity detection of metal-C/N/O vibrations and low-coverage/weakly adsorbed species at surfaces and interfaces.

The station primarily comprises an optical path system, in situ reaction system, synchronous acquisition and control system, and ultra-high vacuum surface analysis system. It has established a suite of experimental methods including:

    Internal and external reflection spectroscopy for solid-liquid systems；

    Specular reflection, diffuse reflectance, transmission and in situ IR-XPS spectroscopy for solid-gas systems.

    Key application areas cover surface and interface science, catalysis, energy chemistry, and materials science research, etc.

Parameters:

Spectral range: 4000~90 cm⁻¹

Spectral resolution: ~2 cm⁻¹@20 μm

Detection ability for adsorbed species: 0.01 monolayer

Ultra-high vacuum environment for surface treatment/preparation/ characterization: ~6.7×10⁻⁸ Pa

Contact：

Dr. Zhu Xiaodi: zhuxiaodi@ustc.edu.cn