Highly dispersed ultrasmall ruthenium nanoparticles with a clean surface are deposited onto graphitic carbon nitride (C₃N₄-Ru) through spontaneous redox reaction between the C₃N₄ sheets and Ru salt without the use of any reductant. The as-prepared C₃N₄-Ru exhibits distinct peroxidase-like activity. A nanozyme based method is successfully developed for detecting the H₂O₂ generated in-situ by the two-electron oxygen reduction strategy. The C₃N₄-Ru nanozyme can realize the detection of H₂O₂ with a wide linear range and a low detection limit. The testing results are also compared with the conventional modified titration method, and show greater possibility for the practical detection of H₂O₂ produced via the electrochemical oxygen reduction for its higher selectivity.

中文翻译：

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自发沉积均匀分布的钌纳米颗粒在石墨氮化碳上用于定量电化学积累的 H2O2

在不使用任何还原剂的情况下，通过 C ₃ N ₄片和 Ru 盐之间的自发氧化还原反应，将具有清洁表面的高度分散的超小钌纳米粒子沉积到石墨氮化碳 (C ₃ N ₄ -Ru) 上。所制备的 C ₃ N ₄ -Ru 表现出独特的过氧化物酶样活性。成功开发了一种基于纳米酶的方法，用于检测通过双电子氧还原策略原位生成的 H ₂ O ₂。C ₃ N ₄ -Ru纳米酶可实现H ₂ O ₂的检测具有较宽的线性范围和较低的检测限。测试结果还与传统的改良滴定法进行了比较，表明电化学氧还原产生的H ₂ O ₂具有更高的选择性，在实际检测中具有更大的可能性。