Effective One‐Step Gold Dissolution Using Environmentally Friendly Low‐Cost Reagents

The dissolution of Au is a difficult task. Novel, sustainable etching processes are required to reduce the risks of this process to humans and the environment, to lessen energy usage and costs, and to improve Au removal in applications such as the failure analysis of microelectronic devices [1] and metal recovery from waste. Despite sustainability concerns, Au dissolution often involves harmful and/or polluting proA which are commonly based on aqua regia or cyanide solutions containing mild oxidants. [2] More recently, mixtures of thionyl chloride and organic reagents, such as pyridine, N,N-dimethylformamide and imidazole, formulated by