Reduced coenzyme II acts as both reducing and capping agents in the growth of AgPd nanoclusters within a suitable range of [K2Pd(NO2)4]/[AgNO3]. A remarkable acceleration occurs in the growth kinetics of AgPd nanoclusters with respect to monometallic Pd or Ag. AgPd nanoclusters display a marked electron donation from Ag to Pd, thereby contributing to the enhancement of metallic Pd0 atoms. The AgPd nanoclusters exhibit better peroxidase mimicking activities relative to their monometallic counterparts. Addition of iodide ions significantly inhibits the peroxidase mimicking activity of Ag1Pd1 nanozyme. Hence, the Ag1Pd1-catalyzed oxidation of 3,3′,5,5′-tetramethylbenzidine by H2O2 is greatly suppressed. The peroxidase-like activity of Ag1Pd1 nanozyme exhibits a sensitive response to iodide ions in the range of 0.5 ~ 180 nM. AgPd nanozyme possesses a desirable selectivity toward iodide ions with respect to sulfide ions. This work would provide guidance for developing biomimetic nanomaterials in the areas of biosensing, separation, nanotechnology and green synthesis.

中文翻译：

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NADPH 引导合成碘响应纳米酶：纳米团簇生长和过氧化物酶样活性的协同作用

还原型辅酶 II 在合适的 [K2Pd(NO2)4]/[AgNO3] 范围内，在 AgPd 纳米团簇的生长过程中充当还原剂和封端剂。AgPd 纳米团簇相对于单金属 Pd 或 Ag 的生长动力学发生显着加速。AgPd 纳米团簇显示出从 Ag 到 Pd 的显着电子捐赠，从而有助于增强金属 Pd0 原子。与单金属对应物相比，AgPd 纳米团簇表现出更好的过氧化物酶模拟活性。添加碘离子显着抑制了 Ag1Pd1 纳米酶的过氧化物酶模拟活性。因此，Ag1Pd1 催化的 H2O2 对 3,3',5,5'-四甲基联苯胺的氧化被大大抑制。Ag1Pd1 纳米酶的类过氧化物酶活性对 0.5 ~ 180 nM 范围内的碘离子表现出敏感反应。相对于硫化物离子，AgPd 纳米酶对碘离子具有理想的选择性。这项工作将为在生物传感、分离、纳米技术和绿色合成领域开发仿生纳米材料提供指导。