Finding the true catalyst has always been a challenging step toward the exploration, understanding, and design of catalytic systems for water-oxidation reaction. Many homogeneous and heterogeneous transition metal complexes have been reported that can undergo a complete transformation to the true catalysts during water-oxidation reaction. Herein, the transformation of the previously-explored ruthenium red ([(NH₃)₅RuORu(NH₃)₄ORu(NH₃)₅]Cl₆) catalyst in the presence of ammonium cerium(IV) nitrate is reported. For the first time, it is reported that a heterogeneous nano-sized ruthenium–cerium compound is formed by the electrostatic interaction of [(NH₃)₅RuORu(NH₃)₄ORu(NH₃)₅],^6+/7+ nitrate ions, and the products of the reduction of ammonium cerium(IV) nitrate.

中文翻译：

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钌红与硝酸铈铈（IV）反应的新发现和当前争议：着重于沉淀的化合物

寻找真正的催化剂一直是探索，理解和设计用于水氧化反应的催化系统的挑战性一步。已经报道了许多均相和非均相过渡金属络合物，它们在水氧化反应过程中可以完全转化为真正的催化剂。本文中，在铈铈（IV）存在下，先前探索的钌红（[（NH ₃）₅ RuORu（NH ₃）₄ ORu（NH ₃）₅ ] Cl ₆）催化剂的转化）有硝酸盐报道。首次报道，通过[（NH ₃）₅ RuORu（NH ₃）₄ ORu（NH ₃）₅ ]，^{6 + / 7 +}的静电相互作用形成了异质纳米尺寸的钌-铈化合物。硝酸根离子，以及还原硝酸铵铈（IV）的产物。