Sol–Gel-Synthesized Pt, Ni and Co-Based Electrocatalyst Effects of the Support Type, Characterization, and Possible Application in AEM-URFC. - Petkucheva, Elitsa Stanislavova; Mladenova, Borislava; Muhyuddin, Mohsin; Dimitrova, Mariela; Borisov, Galin Rusev; Santoro, Carlo; Slavcheva, Evelina (Gels (2310-2861), 2025)