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Ice Melting to Release Reactants in Solution Syntheses
Author(s) -
Wei Hehe,
Huang Kai,
Zhang Le,
Ge Binghui,
Wang Dong,
Lang Jialiang,
Ma Jingyuan,
Wang Da,
Zhang Shuai,
Li Qunyang,
Zhang Ruoyu,
Hussain Naveed,
Lei Ming,
Liu LiMin,
Wu Hui
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201711128
Subject(s) - aqueous solution , chemistry , ruthenium , dissolution , osmium , inorganic chemistry , palladium , kinetics , rhodium , precipitation , melting point , iridium , chemical engineering , organic chemistry , catalysis , meteorology , engineering , physics , quantum mechanics
Aqueous solution syntheses are mostly based on mixing two solutions with different reactants. It is shown that freezing one solution and melting it in another solution provides a new interesting strategy to mix chemicals and to significantly change the reaction kinetics and thermodynamics. For example, a precursor solution containing a certain concentration of AgNO 3 was frozen and dropped into a reductive NaBH 4 solution at about 0 °C. The ultra‐slow release of reactants was successfully achieved. An ice‐melting process can be used to synthesize atomically dispersed metals, including cobalt, nickel, copper, rhodium, ruthenium, palladium, silver, osmium, iridium, platinum, and gold, which can be easily extended to other solution syntheses (such as precipitation, hydrolysis, and displacement reactions) and provide a generalized method to redesign the interphase reaction kinetics and ion diffusion in wet chemistry.