Abstract
? 2022 Elsevier B.V.The development of electrocatalysts that show multifunctionality towards efficient sensing and energy applications are of great significance. Herein, we report a rational design of photochemical deposition of Ag nanoparticles (Ag NPs) on ZIF-67-decorated carbon nanotube (Ag NPs/ZIF-67 @CNT) hybrid, which exhibits dual-functional capabilities for both effective enzymeless glucose detection and electrocatalytic water oxidation. The distribution of Ag NPs on the ZIF-67-functionalized CNT can be optimized by adjusting the concentration of Ag+ aqueous solution during the light illumination process. The optimized Ag NPs/ZIF-67 @CNT composite showed superior glucose-sensing capability with a low determination limit of 0.46 μM (S/N = 3), high sensitivity of 469.4 μA·mM?1·cm?2, wide linearity detection range (0.010–7.0 mM) and short response time (less than 5 s). Also, the Ag NPs/ZIF-67 @CNT composite acting as potential electrocatalyst possessed an overpotential of 286 mV with a Tafel-slope of 80.75 mV dec?1 at 10 mA·cm?2 for high durability water-oxidation reaction. This work provided a feasible way to prepare Ag NPs decorated ZIF-67/CNT with modulated bifunctional catalytic performances via photochemical reduction strategy, which can also provide effective guidance for designing other multifunctional electrocatalysts.
NSTL
Elsevier