Castro Tubío, José ManuelMalatini, CamillaBarrio Cagigal, Victoria LauraFernández Masaguer, Jorge ChristianAmorín López, ManuelNabgan, ‪WalidTaboada Antelo, PabloGil González, ÁlvaroCoelho Cotón, Alberto José2023-01-172023-01-172022Materials Today Chemistryhttp://hdl.handle.net/10347/29886A straightforward manufacture strategy is proposed to obtain an efficient and robust palladium-alumina (Pd0/Al2O3) cermet monolithic catalyst, specifically designed to perform safe microwave assisted organic synthesis (MAOS). In this approach, a cermet catalyst with high surface area, controlled composition and adapted shape and dimensions to a microwave reactor vessel is generated via 3D printing technology and sintering. The resulting catalyst has been explored in heterogeneous Suzuki, Sonogashira, Stille and Heck cross-coupling reactions, in MAOS. The Pd0 catalyst is permanently active, stable, without leaching and can be recycled and reused at least 200 reaction cycles. The generation of hot spots, sparking or hazardous discharges is controlled by the effective immobilization of the palladium in the monolithic structure during the reaction. The palladium content is forming part of both the internal and external structure, providing greater mechanical resistance and catalytic activity with respect to the basic ceramic material (alumina)eng© 2022 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)Attribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/3D-printingHeterogeneous catalystPalladium-cross-coupling reactionsMicrowave-assisted reactionsMetal-ceramicjournal article10.1016/j.mtchem.2022.1013552468-5194open access