Issue 66, 2015

Synthesis and characterization of Pd–Ni core–shell nanocatalysts for alkaline glucose electrooxidation

Abstract

PdshellNicore catalyst decorated carboxylated multi-walled carbon nanotubes (Pd–Ni/C) are synthesized using a two-stage polyol method. The nano-sized Pd–Ni/C catalysts have a metal particle size range of 4.7 to 6.6 nm. The PdshellNicore nanoparticles improve the electrocatalytic activity and durability of glucose oxidation reactions (GORs). X-ray diffraction (XRD), high resolution transmission electron microscopy (HR-TEM), scanning transmission electron microscopy (STEM) and scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDS) are used to characterize the crystalline structure, particle formation, crystalline nature and elemental distribution, respectively. Cyclic voltammetry (CV), Tafel analysis, chronoamperometry (CA) and multi-cycle cyclic voltammetry (mCV) are used to determine the electrochemical properties of the Pd–Ni/C catalysts. The results indicated that Pd–Ni/C (1 : 0.06) exhibits the highest electrochemical surface area (ECSA) of 78.0 m2 g−1 which is 4.5 times higher than that of Pd/C and as well as having a 1.5-fold higher GOR current density of 21.2 mA cm−2. The stability of Pd–Ni/C toward GOR is also significantly enhanced according to the results of the poisoning rate study and 200 cycling CV test. The highest Pd–Ni/C (1 : 0.06) catalyzed GOR current density of 34.2 mA cm−2 is attained in 0.5 M glucose and 1.0 M NaOH alkaline medium.

Graphical abstract: Synthesis and characterization of Pd–Ni core–shell nanocatalysts for alkaline glucose electrooxidation

Supplementary files

Article information

Article type
Paper
Submitted
09 Apr 2015
Accepted
05 Jun 2015
First published
05 Jun 2015

RSC Adv., 2015,5, 53333-53339

Author version available

Synthesis and characterization of Pd–Ni core–shell nanocatalysts for alkaline glucose electrooxidation

C. Chen and L. Chen, RSC Adv., 2015, 5, 53333 DOI: 10.1039/C5RA06331K

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