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首页> 外文期刊>The Analyst: The Analytical Journal of the Royal Society of Chemistry: A Monthly International Publication Dealing with All Branches of Analytical Chemistry >Superior non-enzymatic glucose sensing properties of Ag-/Au-NiCo2O4 nanosheets with insight from electronic structure simulations
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Superior non-enzymatic glucose sensing properties of Ag-/Au-NiCo2O4 nanosheets with insight from electronic structure simulations

机译：电子结构模拟中具有洞察力的Ag-/ Au-Nico2O4纳米液的优异的非酶促葡萄糖感测性能

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摘要

Ag-/Au-NiCo2O4 nanosheets were synthesized by a facile electrodeposition approach on conducting Ni foam, and their non-enzymatic glucose sensing performance was investigated. The hybrid nanosheets of NiCo2O4 and noble-metal nanoparticles supported on conductive Ni foam possessed high active surface area along with intrinsic electrocatalytic and biocatalytic properties and promoted electronic/ionic transport in the electrodes, leading to improved glucose sensing properties. The sensitivity of the bare NiCo2O4 nanosheets for electrochemical non-enzymatic glucose sensing was 20.8 mu A mu M-1 cm(-2), whereas the NiCo2O4-Ag and NiCo2O4-Au nanosheet electrodes exhibited enhanced sensitivities of 29.86 and 44.86 mu A mu M-1 cm(-2), respectively, with lower response times in the same linear range of 5-45 mu M. We also performed density functional theory simulations to corroborate our experimental observations by investigating the interactions and charge-transfer mechanism of glucose on Ag-and Au-doped NiCo2O4. As Au is bound more strongly to the NiCo2O4 surface compared to Ag, the binding energy of glucose is greater on the Au-doped NiCo2O4 surface than on the Ag-doped NiCo2O4 surface, and Au doping makes NiCo2O4 more conductive compared to Ag doping. Thus, it can be theoretically inferred that Au-doped NiCo2O4 has better glucose sensing performance, which supports our experimental data.
机译：通过在导电Ni泡沫上的容易电沉积方法合成Ag-/ Au-Nico2O4纳米片，并研究了它们的非酶促葡萄糖感测性能。在导电Ni泡沫上负载的NicO2O4和贵金属纳米颗粒的杂种纳米片具有高活性表面积以及本征电催化和生物催化性能并促进电极中的电子/离子输送，导致葡萄糖感测性质。用于电化学非酶促葡萄糖感测的裸NICO2O4纳米蛋白酶的敏感性为20.8μmM-1cm（-2），而NicO2O4-Ag和NicO 2 O 4-Au纳米晶片电极表现出增强的敏感性29.86和44.86亩分别在相同的线性范围内的响应时间为5-45亩，我们还通过研究葡萄糖的相互作用和电荷转移机制来执行密度函数理论模拟以证实我们的实验观察。 Ag和Au-掺杂的Nico2O4。随着与Ag相比，由于Au更强烈地束缚到NicO 2 O 4表面，葡萄糖的结合能量在Au掺杂的NicO 2 O 4表面上比在Ag掺杂的NicO 2 O 4表面上更大，并且与Ag掺杂相比，Au掺杂使NiCO 2 O 4更具导电性。因此，理论上可以理解地推断出Au-掺杂的Nico2O4具有更好的葡萄糖感测性能，这支持我们的实验数据。

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