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Many technologies needed for the so\u2010called energy transition depend on critical metals such as platinum, lithium, iridium and cobalt. Here we focus on solid borohydride salts as hydrogen carriers, studying catalysts for hydrogen release. We combine metal 3D printing technology and a Raney\u2010type leaching process to make structured macroscopic catalyst\/reactor monoliths of cobalt, aluminium and stainless steel with well\u2010defined micropores. Remarkably, the blank catalyst samples, which are made only from aluminium and stainless steel (Al\u2010SS), show high activity and, importantly, high stability in borohydride hydrolysis, with no mass loss and no surface poisoning. The batch results are confirmed in a continuous setup running for 96\u2005h. Catalyst performance is attributed to the stable porous structure, the mechanical stability of the stainless steel macrostructure, and the presence of accessible Al(OH)x sites. This research shows a clear contribution to sustainability based on multi\u2010factor comparison: The Al\u2010SS catalyst outperforms the state\u2010of\u2010the\u2010art on mechanical and chemical durability, it is both PGM\u2010free and CRM\u2010free, and its preparation follows a simple, scalable and low\u2010waste procedure.<\/jats:p>","DOI":"10.1002\/cssc.202401264","type":"journal-article","created":{"date-parts":[[2024,10,29]],"date-time":"2024-10-29T04:27:27Z","timestamp":1730176047000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Borohydride Hydrolysis Using a Mechanically and Chemically Stable Aluminium\u2010Stainless Steel Porous Monolith Catalyst Made by 3D Printing"],"prefix":"10.1002","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6179-4903","authenticated-orcid":false,"given":"Frances","family":"Pope","sequence":"first","affiliation":[{"name":"Van 't Hoff Institute for Molecular Sciences University of Amsterdam  Science Park 904 1098 XH Amsterdam The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-1012-5223","authenticated-orcid":false,"given":"Xhoi","family":"Xhaferri","sequence":"additional","affiliation":[{"name":"Van 't Hoff Institute for Molecular Sciences University of Amsterdam  Science Park 904 1098 XH Amsterdam The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0003-2802-1583","authenticated-orcid":false,"given":"Daan","family":"Giesen","sequence":"additional","affiliation":[{"name":"Technology Centre FNWI University of Amsterdam  Science Park 904 1098 XH Amsterdam The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0624-7878","authenticated-orcid":false,"given":"Norbert J.","family":"Geels","sequence":"additional","affiliation":[{"name":"Van 't Hoff Institute for Molecular Sciences University of Amsterdam  Science Park 904 1098 XH Amsterdam The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5868-229X","authenticated-orcid":false,"given":"Jessica","family":"Pichler","sequence":"additional","affiliation":[{"name":"Austrian Centre of Competence for Tribology AC2T Research GmbH  Viktor-Kaplan-Stra\u00dfe 2 2700 Wiener Neustadt Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1286-4474","authenticated-orcid":false,"given":"Gadi","family":"Rothenberg","sequence":"additional","affiliation":[{"name":"Van 't Hoff Institute for Molecular Sciences University of Amsterdam  Science Park 904 1098 XH Amsterdam The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2024,10,29]]},"reference":[{"key":"e_1_2_8_1_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijhydene.2022.12.058"},{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.scca.2023.100012"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.resourpol.2023.104137"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.3390\/min11010054"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11837-013-0666-4"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41893-018-0139-4"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.envres.2016.05.052"},{"key":"e_1_2_8_8_1","doi-asserted-by":"publisher","DOI":"10.3390\/resources7030049"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijhydene.2022.02.094"},{"key":"e_1_2_8_10_1","doi-asserted-by":"publisher","DOI":"10.1002\/fuce.200800171"},{"key":"e_1_2_8_11_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijhydene.2011.07.125"},{"key":"e_1_2_8_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijhydene.2012.06.117"},{"key":"e_1_2_8_13_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijhydene.2016.03.122"},{"key":"e_1_2_8_14_1","doi-asserted-by":"publisher","DOI":"10.1039\/D3GC00821E"},{"key":"e_1_2_8_15_1","doi-asserted-by":"publisher","DOI":"10.1002\/ceat.202400087"},{"key":"e_1_2_8_16_1","unstructured":"R. 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