Effects of pH and Anion on Hydrogen Sorption/Desorption at/within Oxide-Derived Pd Electrodes

Chi Chang Hu, Ten Chin Wen

研究成果: Article同行評審

23 引文 斯高帕斯(Scopus)

摘要

Oxide-derived Pd electrodes were obtained by cathodic polarization of Pd oxide-coated titanium electrodes (fabricated by thermal decomposition) at 0 V (RHE) for 30 min in 1.5 mol dm-3 NaOH. Hydrogen adsorption/absorption (denoted hereafter as sorption) and desorption within/at these electrodes were obtained using cyclic voltammetry (CV) chronopotentiometry, and linear sweep voltammetry (LSV). CV results revealed that (3-PdH formation/oxidation is more reversible in either concentrated acid or base solutions than in intermediate pH media and the rate of (3-PdH desorption is faster in a pH solution <10. The oxidation of 3-PdH is electron transfer controlled in intermediate pH media, especially in weakly basic solutions due to the adsorption of H2PO4/HPO42-. The sequence of anions with respect to increasing ability to inhibit hydrogen sorption is: CH3COO- < Cl- < HSO4- ~CIO4 < HC2O4-< H2PO4-.

原文English
頁(從 - 到)1376-1383
頁數8
期刊Journal of the Electrochemical Society
142
發行號5
DOIs
出版狀態Published - 1995 四月

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 可再生能源、永續發展與環境
  • 表面、塗料和薄膜
  • 電化學
  • 材料化學

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