Electrocatalytic behavior and stability of black Ruthenium electrode in acidic media

Authors

Marie Joshua Tapas National Institute of Physics, University of the Philippines Diliman
Monica Manahan National Institute of Physics, University of the Philippines Diliman
Roland Sarmago National Institute of Physics, University of the Philippines Diliman

Abstract

Black ruthenium was electrodeposited onto gold plated silver substrates by passing 0.090A for 5 mins at 65^oC bath temperature generating 0.0023 grams of
Ru deposit with equivalent thickness equal to 0.9μm. Electrochemical measurements were employed to study the electrocatalytic behavior and stability of Ru in 0.5M sulfuric acid. The exchange current density, i_o, was determined from the full scan of the tafel curve consisting of anodic and cathodic regions. The average i_o from the three trials, 2.7x10^-5A/cm², is comparable to the other metals in the platinum metals group which are established to have the best electrocatalytic properties. Electrode stability was evaluated by doing 50 scans between -0.20-0.80V and 25 scans between -0.20V-1.3V. Cyclic voltammetry results show that Ru exhibits reversible oxide formation/reduction at potentials lower than or equal to 0.8V. Increasing the upper potential limit to 1.3V results in the anodic dissolution of Ru.

Downloads

Issue

2011: Proceedings of the 29th Samahang Pisika ng Pilipinas National Physics Congress

Article ID

SPP2011-PA-15

Section

Poster Session PA

Published

2011-10-24

How to Cite

[1]

MJ Tapas, M Manahan, and R Sarmago, Electrocatalytic behavior and stability of black Ruthenium electrode in acidic media, Proceedings of the Samahang Pisika ng Pilipinas 29, SPP2011-PA-15 (2011). URL: https://proceedings.spp-online.org/article/view/SPP2011-PA-15.