A novel approach to prepare a HAu(Cys)₂ compound via a ligand exchange reaction in an aqueous solution is introduced. The prepared HAu(Cys)₂ compound is shown as a very good main salt for environmentally friendly cyanide-free gold electrodeposition. From the established simple and sustainable electrolyte recipe just containing HAu(Cys)₂, cysteine, and potassium hydroxide, the electrodeposited gold is pure, fine, and compact.

中文翻译：

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HAu（Cys）_2的新型绿色化合物：建立一种简单且可持续的无氰金电镀液配方

介绍了一种通过水溶液中的配体交换反应制备HAu（Cys）₂化合物的新方法。所制备的HAu（Cys）₂化合物显示为非常环保的无氰化金电沉积很好的主盐。从仅含有HAu（Cys）₂，半胱氨酸和氢氧化钾的已建立的简单且可持续的电解质配方中，电沉积的金是纯净，精细和致密的。