RT Journal Article T1 A Hierarchical Polyoxometalate/Pd/Mos2 Hybrid: Developing an Efficient Novel Bifunctional Catalyst for Water Splitting A1 Guillén Soler, Melanie A1 Vassilyeva, Natalia V. A1 Quirós Díez, Eugenia Pilar A1 Vila Fungueiriño, José Manuel A1 Forment Aliaga, Alicia A1 Giménez López, María del Carmen K1 Bifunctional electrocatalyst K1 Heterostructures K1 Molybdenum disulfide K1 Pal-ladium K1 Polyoxometalate K1 Water splitting AB Catalytic water splitting is a promising approach to produce clean hydrogen fuel from renewable energy sources. However, developing hybrid heterostructures capable of efficiently breaking down water into its constituent elements, hydrogen, and oxygen, presents a considerable challenge. In this study, a novel hierarchical POM/Pd/MoS2 hybrid heterostructure, composed of sheets of MoS2 modified with Pd nanoparticles and combined with a cobalt-based polyoxometalate (POM), serving as bifunctional catalyst for water splitting is reported. Through a synergistic synthetic approach, MoS2, acting as a reducing agent, triggers the nucleation and growth of Pd nanoparticles, which, in turn, serve as anchoring sites for the polymerization of the cobalt-based POM into fibers. POM/Pd/MoS2 hybrid exhibits an enhanced oxygen evolution reaction (OER) activity, comparable to the benchmark catalysts Ir/C and IrO2/C in alkaline media, being its hydrogen evolution reaction (HER) activity similar to the activated Pd/MoS2 hybrid. The intriguing electrocatalytic capability of the resulting material for producing hydrogen and oxygen through electrochemical means arises from the enhanced charge storage capacity and conductivity of MoS2, the multi-electron transfer facilitated by the POM, and the high electrocatalytic activity of the metals PB Wiley SN 2366-7486 YR 2023 FD 2023 LK http://hdl.handle.net/10347/33050 UL http://hdl.handle.net/10347/33050 LA eng NO M. Guillen-Soler, N. V. Vassilyeva, E. P. Quirós-Díez, J. M. Vila-Fungueiriño, A. Forment-Aliaga, M. del C. Gimenez-Lopez, A Hierarchical Polyoxometalate/Pd/Mos2 Hybrid: Developing an Efficient Novel Bifunctional Catalyst for Water Splitting. Adv. Sustainable Syst. 2023, 2300607. https://doi.org/10.1002/adsu.202300607 NO M.G.-S., N.V.V., and E.P.Q.-D. contributed equally to the work. Thiswork has received financial support from the Ministry of Science ofSpain (RYC-2016-20258, PID2021-127341OB-I00, TED2021-131451BC21and PDC2022-133925-I00 for M.d.C.G.-L. and IJC2020-044369-I for J.M.V.-F.), the European Research Council (ERC) [Starting Grant (NANOCOMP-679124) and ZABCAT (966743) for M.d.C.G.-L.], the Generalitat Valenciana(MFA/2022/050 for A.F. and fellowship GRISOLIAP/2019/030 for N.V.),the Xunta de Galicia (Centro singular de investigación de Galicia accredi-tation 2019–2022, ED431G 2019/03 and ED481A-2020/155), and the Eu-ropean Union (European Regional Development Fund─ERDF) DS Minerva RD 29 abr 2026