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Pàgina inicial > Articles > Articles publicats > Understanding galvanic replacement reactions : |
Data: | 2020 |
Resum: | Synthesis of nanocrystals (NCs), where material science elements are addressed with organic chemistry precision techniques, is especially challenging and difficult to control. This difficulty arises from the increased complexity of the mineralization processes and the generation of a liquid-solid interface. These aspects, along with a strong susceptibility to reaction kinetics, ultimately translate into serious challenges for reproducibility and morphological control. By systematically varying the different parameters used to control the morphology of NCs, including complexing agents, coreducers, and cooxidants, the general reaction landscape can be mapped and the most stable and reproducible recipes can be identified. We apply this concept to the model transmetallation reaction between immiscible Pt and Ag forming hollow Pt NCs by galvanic replacement reactions. In this work, 648 synthetic recipes were performed and characterized per duplicate, from which a subset of 307 recipes leading to the controlled formation of hollow NCs were further analyzed to correlate reaction conditions with the final obtained structure and stability (reproducibility). As a result, we present robust general synthetic protocols leading to the ad hoc production of Pt-based hollow NCs with independent control of shell thickness, void size, surface roughness, and degree of porosity. |
Ajuts: | Ministerio de Ciencia e Innovación RTI2018-099965-B-I00 Ministerio de Economía y Competitividad ENE2017-85087-C3 Ministerio de Economía y Competitividad SEV-2017-0706 Ministerio de Economía y Competitividad MAT2015-70725-R Ministerio de Economía y Competitividad RYC-2012- 10991 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1431 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017-SGR-327 |
Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. |
Llengua: | Anglès |
Document: | Article ; recerca ; Versió publicada |
Matèria: | Pt-based hollow nanocrystals ; Synthesis ; Transmetallation ; Alloys ; Catalysis |
Publicat a: | Materials Today Advances, Vol. 5 (March 2020) , art. 100037, ISSN 2590-0498 |
8 p, 3.2 MB |