Science Fair Projects

Synthesis of Palladium Nanowires by Electrodeposition onto Highly
Oriented Pyrolitic Graphite


The objective: The project was aimed at finding the best combination of nucleation time, deposition time, and deposition potential for palladium nanowires. It was hypothesized, from the third scan of a cyclic voltammagram taken, that the deposition potential would be approximately .400 V. It was hypothseized that the nucleation time would be anywhere ranging from 5-7ms, and the deposition time anywhere from 600s-1800s based on previous research.


Highly Oriented Pyrolitic Graphite (HOPG) Palladium Nitrate Solution: 60% HClO4 (1.54 g/mL, 9.2 M), Water, Pd(NO3)2 #H2O Potentiostat, Saturated Calomel Reference Electrode, Palladium Flag, Working Electrode, SEM, Scotch tape, ECHEM Software, Light microscope Methods: A solution of Pd(NO3)2 H2O was made. The working electrode containing HOPG, counter electrode, and reference electrode were inserted into the solution. During the conditioning period, the graphite was oxidized using the ECHEM program. A nucleation pulse was then applied to initiate the nanowire growth. Following their deposition, the wires were taken to the Scanning Electron Microscope (SEM) and imaged.


After repeated trials, the best conditions for optimal nanowire growth was determined to be a deposition potential of .370 V, deposition time of 1200s, and nucleation time of 5ms. The hypothesis that the deposition potential would be near the value of 400 V was confirmed to be correct.


Palladium nanowires of diameters ranging from 62.9 to 159 nm were synthesized by electrodeposition onto highly oriented pyrolitic graphite. Variables of nucleation times, nucleation potentials, and deposition potentials were adjusted to produce the most structured nanowires. It was concluded that a deposition potential of .370 V, a deposition time of 1200s, and a nucleation time of 6 ms resulted in optimal wire growth.

This project is to find the optimal combination of variables of nucleation time, deposition time, and deposition potential for producing the most structured nanowires by the electrodeposition of palladium onto HOPG.

Science Fair Project done By Kaidi He


Related Projects : Does the Temperature of a Magnet Affect Its Strength, Zero Gravity Elevator Experiment, Cold Nuclear Fusion, What Didge You Hear, Effects of Soap, Salt, and Temperature , Orange You Glad You Have Vitamin C, Effect of Water and Temperature in Varying the Toxicity, C The Juice, Acid Ice: The Effect of pH on the Freezing Point of Water, Counterfeit Attack, Do Oranges Lose or Gain Vitamin C After Being Picked, Abating Acid Rain, Which Orange Juice Contains the Most Vitamin C, Borax Acts or Gets the Ax, Corrosion and Conductivity, Apple Dehydration, The Focalization of Sound, Specific Heat in Materials, Quantifying the Effect of Tungsten Illumination on Color Rendering of Low-Pressure Sodium, Color vs. Heat Absorption


<<Back To Topics Page........................................................................................>> Next Topic



Copyright © 2013 through 2015