摘要
We develop a unique ternary Pd-Ni-P nanocatalyst for the sensitive enzyme- free electrooxidation detection of glucose under alkaline conditions. By reducing the distance between the Pd and Ni active sites in the Pd-Ni-P nanoparticles （NPs） via atom engineering, the catalyst structure is transformed from Pd@Ni-P dumbbells into spherical NPs, greatly enhancing the catalyst sensitivity. The glassy carbon electrode modified with Pd-Ni-P ternary NPs, which behaves as an efficient nonenzymatic glucose sensor, offers excellent electrocatalytic performance with a high sensitivity of 1,136 μA·mM^-1·cm^-2, a short response time of 2 s, a wide linear range of 0.5 μM to 10.24 mM, a low limit of detection of 0.15 μM （signal-to-noise ratio = 3）, and good selectivity and reproducibility. Moreover, owing to its superior catalytic performance, the Pd-Ni-P modified electrode has excellent reliability for glucose detection in real samples of human serum. Our study provides a promising alternative strategy for designing and constructing high-performance multicomponent nanocatalyst-based sensors.
We develop a unique ternary Pd-Ni-P nanocatalyst for the sensitive enzyme- free electrooxidation detection of glucose under alkaline conditions. By reducing the distance between the Pd and Ni active sites in the Pd-Ni-P nanoparticles （NPs） via atom engineering, the catalyst structure is transformed from Pd@Ni-P dumbbells into spherical NPs, greatly enhancing the catalyst sensitivity. The glassy carbon electrode modified with Pd-Ni-P ternary NPs, which behaves as an efficient nonenzymatic glucose sensor, offers excellent electrocatalytic performance with a high sensitivity of 1,136 μA·mM^-1·cm^-2, a short response time of 2 s, a wide linear range of 0.5 μM to 10.24 mM, a low limit of detection of 0.15 μM （signal-to-noise ratio = 3）, and good selectivity and reproducibility. Moreover, owing to its superior catalytic performance, the Pd-Ni-P modified electrode has excellent reliability for glucose detection in real samples of human serum. Our study provides a promising alternative strategy for designing and constructing high-performance multicomponent nanocatalyst-based sensors.
基金
This work was supported by the National Natural Science Foundation of China （Nos. 21475007, 21675009, and 21275015）. We also thank the support from the ＂Public Hatching Platform for Recruited Talents of Beijing University of Chemical Technology＂.
