Electrochemical de-alloying synthesis of porous AuTiCeOx/NC cyclohexene hydrogenation SPE membrane electrode by combination method

High-performance hydrogenation catalysts are crucial for integrating hydrogen production and storage in organic/water systems, as well as for CO 2 electrocatalytic reduction reactions. In this study, ion beam sputtering, coupled electrochemical de-alloying, and hot pressing have been employed to fabricate an SPE membrane electrode containing porous AuTiCeO x /NC. Characterization techniques were utilized to analyze and discuss the phase composition, surface morphology, components, exposed crystal faces, and their relationship with the catalytic efficiency and reaction stability of the Au-based SPE membrane electrode during the hydrogenation of cyclohexene. The results revealed that the membrane electrode carrier is composed of hexagonal phase C 3 N 4 , the Au-based catalyst possesses tetragonal Au 2 Ti and face-centered cubic Au phases, and Ce exists as amorphous ceria at the grain boundary; electrochemical de-alloying treatment yielded uniform elemental distribution and mesopores with an average pore size of