Investigation on the unexpected capacitive behaviour of Pt(111) in acidic medium with SRXRD coupled with ab initio calculations

The goal of the present project is to get the atomic/electronic description of the electrochemical interface for the archetypal system Pt(111) as a function of the pH and the concentration of the perchlorate solution. Indeed, an unexplained capacitive behaviour has been observed by several authors, but never explained, due to the lack of experimental probes of the interfacial charges. Beyond this system, the expected results will allow to improve the ab initio theoretical description of the SRXRD spectra and make more and more realiable our new approach coupling SRXRD and ab initio simulation. This will be a major contribution to the up to now lacking experimental evidence of the electrochemical interface charge distribution.