Anisotropic Palladium Nanocrystals as Electrocatalyst for Formic Acid Oxidation

• Main Authors: Fan, Yu-Sin, 方郁歆
• Other Authors: Hsu, Yung-Jung
• Format: Others
• Language: en_US
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/06451449301030565710

碩士 === 國立交通大學 === 材料科學與工程學系 === 98 === In this thesis, we successfully synthesized various palladium (Pd) nanocrystals including nanoplates, octahedrons, porous nanocrystals, and hollow nanocrystals in the PVP-assisted chemical reduction process. The synthesis involved only the use of PdCl2 as the precursor, PVP as the reducing and stabilizing agents, and a specific salt like NaCl or NH4OH as the additive. By modulating the relevant reaction conditions such as the amount of PdCl2, the amount of additive, and the reaction temperature, we were able to obtain Pd nanocrystals with controllable morphologies. The four types of Pd nanocrystals exhibited notable electrocatalytic activities toward formic acid oxidation and hydrogen adsorption/desorption. Surface-enhanced Raman spectroscopy for the anisotropically-shaped Pd of nanoplates and octahedrons was also investigated to demonstrate their potential as an active substrate for Raman-sensitive analyte molecules.