Preparation of Carbon-Supported Ternary Nanocatalysts Palladium-Vanadium-Cobalt for Alcohol Electrooxidation

Abstract

Carbon-supported nanocatalysts palladium-vanadium-cobalt (PdVCo) were synthesized via ethylene glycol (EG) reduction reaction and NaBH4-assisted reduction. The electrocatalytic performance for alcohol oxidation in alkaline solutions was investigated. The XRD and EDX results confirmed the incorporation of V and Co with Pd lattice to form the ternary nanocatalysts PdVCo in a single phase. The NaBH4-assisted EG reduction process exhibited highly dispersed nanoparticles with a uniform size, and the electrochemical surface area (ECSA) determined by cyclic voltammetry in 1 M KOH was also superior. In electrocatalysis performance, the cyclic voltammetry (CV) and chronoamperometry (CA) results presented an excellent electrocatalytic activity and stability of the PdVCo-20EG-20NaBH4 sample in the alcohol electrooxidation as compared to other synthesized samples with the steady current of 52 mA/cm2 and 21.9 mA/cm2 in methanol and ethanol, respectively.

Highly active hydrogenation of 4-methoxyacetophenone by the novel carbon-supported ternary nanocatalyst palladium-vanadium-cobalt

“…Distilled water was used in the whole experiment. Nanocatalysts PdVCo was prepared by following method [12]: Palladium chloride (0.4425 g) was added to 50 mL 0.01 M solution of hydrochloric acid, vanadium pentoxide (0.4550 g) was dissolved in 50 mL 0.15 M solution of sodium hydroxide, and cobalt nitrate hexahydrate (0.4570 g) was dissolved in 50 mL distilled water. The combination reducing agents (ethylene glycol and 0.01 M NaBH4) were dropwise added to the above mixture which was stirred for an hour at room temperature.…”

“…Among them, nickel [9][10][11] and palladium [5][6][7][8] are two bright catalysts for hydrogenation. In recent years, the multimetallic catalysts [12] have been interested in various application such as hydrogen evolution [13,14], oxygen reduction [15,16], alcohol oxidation [12,17] and hydrogenation [18][19][20][21] as well. Thus, Ang and co-workers prepared carbon-supported palladium-vanadium nano-catalyst by wet chemical reduction and found that it has excellent catalytic activity and stability in oxygen reduction [22].…”