Abstract
Photoelectrochemical (PEC) cathodic protection was an ecofriendly and promising method for anti-corrosion of metal. In this work, the Ti3C2 MXene-based photoanode was the first time to apply in the PEC anti-corrosion process. The interfacial Schottky junction in TC-x/CN composites was designed by the electrostatic self-assembly method. Different content of Ti3C2 was to investigate the effect on the PEC performance in TC-x/CN composites. Specifically, the TC-1.0/CN showed the highest PEC cathodic protection performance for 304 SS, which revealed low content of Ti3C2 was beneficial for spatial charge separation. Various characterization techniques analysis further verified the Schottky junction successfully formed at the interface between Ti3C2 and g-C3N4 and significantly promote the spatial charge separation. Furthermore, this work proposed the possible electron transfer pathway and deepened understanding of the PEC cathodic protection mechanism.
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