Single-Atom Pt Boosting Electrochemical Nonenzymatic Glucose Sensing on Ni(OH)2/N-Doped Graphene
Single-Atom Pt Boosting Electrochemical Nonenzymatic Glucose Sensing on Ni(OH)2/N-Doped Graphene
复制标题
Ni(OH)2/N-掺杂石墨烯上的单原子 Pt 增强电化学非酶葡萄糖传感
DOI：
10.1021/acs.analchem.1c04912
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发表时间：
2022-01-03
影响因子：
7.4
通讯作者：
Zeng, Ming-Hua
中科院分区：
文献类型：
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作者：
Long, Baojun;Zhao, Yuanmeng;Zeng, Ming-Hua
传统的纳米材料在电化学非酶传感面临着巨大的挑战，由于其复杂的尺寸，表面和组成依赖的催化性能和低活性位点密度。在这项工作中，我们设计了一个单原子Pt负载在Ni（OH）（2）纳米片/氮掺杂石墨烯（Pt-1/Ni（OH）（2）/NG）上作为构建基于单原子催化剂的电化学非酶葡萄糖传感器的第一个例子。Pt-1/Ni（OH）（2）/NG对葡萄糖的灵敏度为220.75 μ A·mM（-1）·cm（-2），比Ni（OH）（2）的灵敏度高12倍，比Ni（OH）（2）的灵敏度低45 mV。该催化剂还显示出对几种重要干扰的优异选择性，4.6 s的短响应时间和超过4周的高稳定性。实验和密度泛函理论（DFT）计算结果表明，Pt-1/Ni（OH）（2）/NG复合材料性能的提高是由于葡萄糖对单原子Pt活性中心及其周围Ni原子的结合强度增强，以及高导电性NG的加入使其具有快速的电子转移能力.本研究为SAC在电化学非酶传感领域的应用提供了新的思路。
Conventional nanomaterials in electrochemical nonenzymatic sensing face huge challenge due to their complex size-, surface-, and composition-dependent catalytic properties and low active site density. In this work, we designed a single-atom Pt supported on Ni(OH)(2) nanoplates/nitrogen-doped graphene (Pt-1/Ni(OH)(2)/NG) as the first example for constructing a single-atom catalyst based electrochemical nonenzymatic glucose sensor. The resulting Pt-1/Ni(OH)(2)/NG exhibited a low anode peak potential of 0.48 V and high sensitivity of 220.75 mu A mM(-1) cm(-2) toward glucose, which are 45 mV lower and 12 times higher than those of Ni(OH)(2), respectively. The catalyst also showed excellent selectivity for several important interferences, short response time of 4.6 s, and high stability over 4 weeks. Experimental and density functional theory (DFT) calculated results reveal that the improved performance of Pt-1/Ni(OH)(2)/NG could be attributed to stronger binding strength of glucose on single-atom Pt active centers and their surrounding Ni atoms, combined with fast electron transfer ability by the adding of the highly conductive NG. This research sheds light on the applications of SACs in the field of electrochemical nonenzymatic sensing.