In this study, a simple and mild route was designed for the synthesis of novel octahedral Ni-introduced CuAu nanocages via a co-reduction process. Based on sequential reactions, Cu₂O/Au nano-octahedra were firstly prepared through galvanic displacement reaction by employing octahedral Cu₂O as the template, and then nickel and copper were introduced almost simultaneously to form the Ni-introduced CuAu nanocages by using N₂H₄·H₂O as the reducing agent and excess Cu₂O as the copper source. The peroxidase-like activity of the Ni-introduced CuAu nanocages was tested and the relevant parameters of their enzymatic activity were also investigated systematically. Compared with monometallic Cu₂O/Au nano-octahedra, Ni-introduced CuAu nanocages have superior catalytic activity, and such a magnetic catalyst could still keep a relatively high catalytic efficiency after several cycles. The results showed that the as-prepared magnetic multi-metallic nanocages could be used as an efficient recyclable peroxidase-like catalyst.

中文翻译：

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镍引入的CuAu纳米笼：易于共还原合成具有高过氧化物酶模拟活性的新型磁性多金属纳米结构†

在这项研究中，设计了一种简单而温和的途径，用于通过共还原过程合成新的八面体Ni引入的CuAu纳米笼。在顺序反应的基础上，首先以八面体Cu ₂ O为模板，通过电流置换法制备了Cu ₂ O / Au纳米八面体，然后几乎同时引入镍和铜，并利用N形成了引入Ni的CuAu纳米笼。₂ H ₄ ·H ₂ O作为还原剂和过量的Cu ₂O作为铜源。测试了Ni引入的CuAu纳米笼的过氧化物酶样活性，并系统地研究了其酶活性的相关参数。与单金属Cu ₂ O / Au纳米八面体相比，引入Ni的CuAu纳米笼具有更好的催化活性，并且这种磁性催化剂在几个循环后仍可保持较高的催化效率。结果表明，所制备的磁性多金属纳米笼可作为一种有效的可循环利用的过氧化物酶样催化剂。