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The initial precipitation phase (nucleation) leads to a suspension from which, in a subsequent aging phase, the final solid precursor is formed, thus providing the structural and morphological features required for later use in catalysis. Combing ultrafast continuous nucleation with sampling from batch\u2010wise aging opens up the possibility to follow the evolution and transitions of solid phases during suspension aging. The temporal progression of the existence of the different phases in a Cu\/ZnO\/ZrO<jats:sub>2<\/jats:sub>\u2010based system is investigated by scanning electron microscopy, X\u2010ray diffraction, and inductive coupled plasma optical emission spectroscopy . According to the findings of this study, the intermediate recrystallization reveals to be a yet unknown two\u2010step process. The presence of an amorphous transient zinc depot of Na<jats:sub>2<\/jats:sub>Zn<jats:sub>3<\/jats:sub>(CO<jats:sub>3<\/jats:sub>)<jats:sub>4<\/jats:sub>\u2009\u00d7\u20093\u2009H<jats:sub>2<\/jats:sub>O greatly influences the formation of the relevant zincian malachite catalyst precursor [(Cu,Zn)<jats:sub>2<\/jats:sub>(OH)<jats:sub>2<\/jats:sub>CO<jats:sub>3<\/jats:sub>], which is partly in contrast to reports on Cu\/ZnO\/Al<jats:sub>2<\/jats:sub>O<jats:sub>3<\/jats:sub> systems. Finally, a general mechanism including the relevant transformations during suspension aging in Cu\/ZnO\/ZrO<jats:sub>2<\/jats:sub> systems is proposed, relying on a general thermodynamic approach, explaining the transient and final species.<\/jats:p>","DOI":"10.1002\/cplu.202500284","type":"journal-article","created":{"date-parts":[[2025,6,12]],"date-time":"2025-06-12T10:38:21Z","timestamp":1749724701000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Phase Transformation Processes in Coprecipitated Cu\/Zn\/Zr Methanol Catalyst Precursors\u2014Insights into Suspension Aging Form Ultrafast Nucleation"],"prefix":"10.1002","volume":"90","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2234-028X","authenticated-orcid":false,"given":"Lucas","family":"Warmuth","sequence":"first","affiliation":[{"name":"Institute of Catalysis Research and Technology (IKFT) Karlsruhe Institute of Technology (KIT)  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