The synergistic catalysis of bimetallic catalysts is one of the important ways to improve the catalytic performance; therefore, the development of efficient bimetallic water oxidation catalysts (WOCs) has received extensive attention. This work proposed a bimetallic Fe₃O₄/CuO catalyst prepared in situ from the Cu–Fe Prussian blue analogues precursor, promoting Fe₃O₄-modified CuO as a highly efficient and stable bimetallic WOC. The Fe₃O₄/CuO exhibits superior and robust catalytic activity for the oxidation of water. Compared with the reported results, it has a higher O₂ evolution rate of about 4406 μmol·h^–1·g^–1 and a maximum value for the yield of O₂ as 83.2%, mainly because of the synergetic effect between Fe₃O₄ and CuO in the complicated water oxidation reaction (WOR) process. We hope this work will be useful for other researchers to design new transition metal bimetallic catalysts for WOR.

中文翻译：

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普鲁士蓝类似物原位制备的高效双金属催化剂用于催化水氧化

双金属催化剂的协同催化是提高催化性能的重要途径之一。因此，有效的双金属水氧化催化剂（WOCs）的开发受到了广泛的关注。这项工作提出了一种由Cu-Fe普鲁士蓝类似物前体原位制备的双金属Fe ₃ O ₄ / CuO催化剂，促进了Fe ₃ O ₄改性的CuO作为高效，稳定的双金属WOC。Fe ₃ O ₄ / CuO对水的氧化显示出优异而稳定的催化活性。与报告的结果相比，它具有更高的O ₂释放速率，约为4406μmol·h ^–1 ·g ^–1O ₂的产率最大值为83.2％，这主要是由于Fe ₃ O ₄与CuO在复杂的水氧化反应（WOR）过程中的协同作用。我们希望这项工作对其他研究人员设计用于WOR的新型过渡金属双金属催化剂有用。