Electrochemical synthesis of palladium (Pd) nanorods: An efficient electrocatalyst for methanol and hydrazine electro-oxidation. (1st July 2018)

• Record Type: Journal Article
• Authors: Das, Ashok Kumar; Kim, Nam Hoon; Pradhan, Debabrata; Hui, David; Lee, Joong Hee
• Is Part Of: Composites. Number 144(2018)
• Page Start: 11
• Page End: 18
• Publication Date: 2018-07-01
• Subjects: Nano-structures -- Smart materials -- Chemical properties -- Chemical analysis -- Electron microscopy; Composite materials -- Periodicals; Materials science -- Periodicals; Composite materials; Periodicals; Electronic journals; 620.118
• DOI: 10.1016/j.compositesb.2018.02.017
• Languages: English
• ISSNs: 1359-8368

Abstract

Abstract: Synthesis of palladium (Pd) nanostructures with unique shapes is crucial due to their shape dependent electrochemical activity. In the current investigation, we demonstrate the electrochemical synthesis of rod-like Pd nanostructures with the assistance of nicotinamide adenine dinucleotide (NAD + ). As-synthesized Pd nanorods were used as electrocatalysts for electrochemical oxidation of methanol and the development of highly sensitive platform for hydrazine detection. Additive NAD + played an important role in the morphology tuning of Pd nanostructures. Results of morphological study demonstrated the growth of Pd nanorods with an average size of 150 nm. The as-synthesized Pd nanorods had excellent electrocatalytic activity toward oxidation of methanol in alkaline pH and hydrazine oxidation in neutral pH. These Pd nanorods catalyzed the electrooxidation of methanol at −0.17 V with much better tolerance, excellent stability, and oxidation of hydrazine at −0.075 V. The Pd nanorod-based sensing platform delivered a low detection limit of 5 nM, sensitivity of 0.78 ± 0.02 μA mM −1 cm −2, and stable response toward hydrazine sensing without any interference from potential interferents such as Na +, K +, NO2 −, BrO3 −, or Pb 2+ ion. Their electrochemical performances were found to be highly dependent on the morphology of Pd nanostructures. Graphical abstract: Image 1 Highlights: Rod-like Pd nanostructure was prepared by simple electrodeposition method. The additive NAD + plays a significant role on the electrochemical growth of Pd nanorods. The as-synthesized Pd nanorods efficiently catalyzed the electrooxidation of methanol and hydrazine. The current synthetic approach could be applied for the synthesis of other metal nanostructures.