Pd-Decorated NiCo2O4 Nanotubes Derived from Template-Free Process for Improved Electrocatalytic Glucose Oxidation

The electrode materials for highly efficient glucose oxidation reaction (GOR) are vital for non-enzymatic glucose sensors (NEGS) and direct glucose fuel cells. The Pd-decorated NiCo2O4 nanotubes (Pd/NiCo2O4 NTs) were prepared through the template-free process. Pd/NiCo2O4 NTs presented highly improved electrocatalytic activity for glucose oxidation. When applied to glucose detection, Pd/NiCo2O4 NTs displayed superior sensing performance with a wide detection range of 5 mu M-9mM. The sensitivity and detection limit are 214.2 mu A . mM(-1). cm(-2) and 1.6 mu M, respectively. Moreover, the Pd/NiCo2O4 NTs sensors also demonstrated excellent selectivity and feasibility for glucose detection for serum sample analysis.

Automated summary

Pd/NiCo2O4 NTs prepared by a template-free method showed highly improved electrocatalytic activity for glucose oxidation, demonstrating superior sensing performance and selectivity for glucose detection in serum samples.