Home > Events > 2018 > Conference: Electrocatalytic energy conversion related processes investigated by in situ soft X-ray synchrotron radiation spectroscopy

Conference: Electrocatalytic energy conversion related processes investigated by in situ soft X-ray synchrotron radiation spectroscopy

Speaker: J. J. Velasco-Vélez (Fritz-Haber-Institute of the Max-Planck-Society, Berlin, 14195, Germany: velasco@fhi-berlin.mpg.de)

Electrochemical energy conversion and storage plays a crucial role in the overall solution of global energetic challenges1. However, the reactions that take place close to an electrified interface are far away to be totally understood. It is, in part, due to the lack of element specific techniques able to monitor the electronic structure of these electrodes under reaction conditions2; i.e. in presence of liquid and during bias control. X-ray absorption (XA) and photo-electron (PE) spectroscopies are powerful techniques that provide unequivocal assignment of chemical species, their electronic structure and in the case of PES in a depth profile manner together with the potentials of the atoms that undergo the ionization process (potential dependence).  However, these spectroscopy techniques (especially in the soft X-ray regimen) are hardly compatible with liquid environments and require ultra-high vacuum for their operation. In this talk we will present some of the development applied in our lab3,4 to investigate relevant electrocatalytic processes such as the water splitting onto IrOx catalysts and the cathodic reduction of CO2 on Cu electrodes into valuables hydrocarbons.

References
1.  R. Schlögl, ChemSusChem, 2010, 3(2), 209-222.
2. J.J. Velasco-Vélez et al., Science, 2014, 346(6211), 831-834.
3. J.J. Velasco-Vélez et al., Ang. Chem. Int. Ed., 2015, 54(48), 14554-15558.
4. J.J. Velasco-Vélez et al., J. of Phys. D: Appl. Phys., 2016, 50(2), 024002.
Event Date: 
Friday, April 20, 2018
Hour: 

12:00

Event Location: 

Aula de Formación Marie Sklodowska

Event Details File: