Key Words:HYDROGEN-EVOLUTION REACTION; NONENZYMATIC GLUCOSE SENSOR; ENHANCED HYDROGEN; FILMS; FOAM; CO
Abstract:It is challenging to find a method to obtain a catalyst with low cost and efficient multifunctional performances. Herein, in order to obtain the electrode with high-performance water splitting and non-enzymatic glucose detection, the commercial graphite sheet (GS) with excellent durability and electroconductivity was used as substrate material, and the non-noble ternary component Ni-Co-P catalyst with hierarchical architecture was fabricated on GS via a co-electrodeposition. The catalyst only required low overpotentials of 44.6, 76.5 and 49 mV to drive the current density of 10 mA cm(-2) alongside with the smaller Tafel slopes of 39.2, 44.8 and 112 mV dec(-1) for hydrogen evolution reaction (HER) in 1.0 M KOH, 0.5 M H2SO4 and 1.0 M PBS solution, respectively. For oxygen evolution reaction (OER), the catalyst demonstrated a low overpotential of 304 mV to achieve the current density of 20 mA cm(-2) with excellent Tafel slope of 89.8 mV dec(-1) in alkaline solution. Furthermore, the Ni-Co-P/GS electrode serving as non-enzymatic glucose sensor exhibited the superior electrocatalytic activity with an ultrahigh sensitivity of 7400 mu A mM(-1) cm(-2), low detection limit of 0.425 mu M (S/N = 3), and wide linear range (1-1200 mu M).
Volume:30
Issue:4
Translation or Not:no