Hydrogen electrosorption on TiHg alloy in acidic solution

Jafarian, M ; Sharif University of Technology | 2007

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jallcom.2006.06.013
  3. Publisher: 2007
  4. Abstract:
  5. Hydrogen evolution and electrosorption on/in TiHg alloy have been investigated in acidic solution using cyclic voltammetry, open circuit potential transient, steady-state polarization, chronopotentiometry and electrochemical impedance measurements. Comparison has been made with pure Ti. Cyclic voltammetry and open circuit potential measurements show that hydrogen absorption into the electrode material occurs during proton discharge. The steady-state polarization curves in the course of positive and negative potential scans illustrate that the formation of absorbed hydrogen slightly improves the electrocatalytic properties of the electrode. The hydrogen diffusion coefficient into the bulk of TiHg alloy was estimated as 1.24 × 10-13 cm2 s-1 from a chronoamperometry measurement and was compared with other materials. Finally, the electrochemical impedance spectroscopy was used to further characterize this electrode. The results show that this electrode displayes porous behavior and may be well described by a serial combination of two parallel R-CPE circuit. © 2006 Elsevier B.V. All rights reserved
  6. Keywords:
  7. Catalysis ; Cyclic voltammetry ; Electrochemical electrodes ; Hydrogen ; Porous materials ; Sorption ; Acidic solutions ; Electrocatalysts ; Hydrogen absorption ; Hydrogen evolution ; TiHg alloys ; Titanium alloys
  8. Source: Journal of Alloys and Compounds ; Volume 432, Issue 1-2 , 2007 , Pages 74-80 ; 09258388 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0925838806007110