Dip and pull ambient pressure photoelectron spectroscopy as a spectroelectrochemistry tool for probing molecular redox processes

Ambient pressure x ray photoelectron spectroscopy APXPS can provide a compelling platform for studying an analyte s oxidation and reduction reactions in solutions. This paper presents proof of principle operando measurements of a model organometallic complex, iron hexacyanide, in an aqueous solution using the dip and pull technique. The data demonstrates that the electrochemically active liquid meniscuses on the working electrodes can undergo controlled redox reactions which were observed using APXPS. A detailed discussion of several critical experimental considerations is included as guidance for anyone undertaking comparable experiment