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Van Marum Colloquium - The in-situ observation for electrochemical energy experiment by Operando X-ray spectroscopy

  • Prof. Chenghao Chuang (Tamkang University, Taiwan)
Tuesday 13 February 2024
Gorlaeus Building
Einsteinweg 55
2333 CC Leiden


Since the energy demand is increasing in modern electric life, the CO2 emission decrease comes to the critical point between science and application, as well as de-coupling fossil fuel usage. The green energy project is one of our objectives for studying the chemical reaction of advanced materials; however, the in-situ environment and real-time probing are the keys to accessing the unknown mechanism. The advantage of using the X-ray beam is identifying the element-specific information and electronic structure configuration of the catalytic materials, i.e., water splitting effect and CO2 reduction reaction as good demonstrations. Recognizing the role of catalysts by X-ray absorption spectroscopy is always required because of the significant linkage to the adsorption state, conversion, and desorption condition. The concept of liquid cell and electrochemical control for the hard and soft X-ray region is introduced in the beamlines of Taiwan light source. First, the catalytic process of hydrogen evolution relation depends on different 3d metal species and their active states, which is studied with mass spectroscopy and X-ray absorption spectroscopy. The experimental target is the common metals of Co, Ni, and Pd oxides for the electrodeposition synthesis. Another example of the dynamic observation for the CO2 reduction reaction is shifted to the alloy of electrodeposited Co and Cu, which shows the specific 3d and 4p state of individual elements compared to the catalytic production. The cutting-edge approaches used in the talk can fully utilize synchrotron-related methods and future promising materials.

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