Stability Testing of Pt<italic>x</italic>Sn1 − <italic>x</italic>/C Anodic Catalyst for Renewable Hydrogen Production Via Electrochemical Reforming of Ethanol.

The stability testing of three different synthesized Pt_{<italic>x</italic>}Sn_{1 − <italic>x</italic>}/C anodic catalysts has been demonstrated for the renewable generation of hydrogen via the electrochemical reforming of ethanol in a proton exchange membrane (PEM) electrolysis cell. Three Pt-Sn anodic catalysts with different nominal Pt:Sn ratios of 60:40, 70:30, and 80:20 atomic (at.) % were synthetized and characterized by the means of electrochemical tests and XRD. Among them, the Pt-Sn anodic catalyst with 70:30 at. ratio showed the highest electrochemical active surface area (ECSA) and highest electrochemical reforming activity, which allowed the production of pure H₂ with the lowest electrical energy requirement (below 23 kWh·kg_H2⁻¹). The stability of the system was also demonstrated through a long-term chronopotentiometry experiment of 48 h in duration. The potential for practical use and coupling this technology with renewable solar energy, a number of cyclic voltammetry tests (with a low scan rate of 0.19 mV·s⁻¹) were also carried out. These experiments were performed by simulating the electrical power produced by a photovoltaic cell. This test showed good stability/reproducibility of the MEA and, hence, a suitable integration between the two technologies for the sustainable energy storage in the form of hydrogen.ᅟGraphical Abstract<graphic></graphic> [ABSTRACT FROM AUTHOR]