- 作者: 許健興 ; 施顏祥 ; 黃鶯聲
- 作者服務機構: 台灣工業技術學院化學工程技術系
- 中文摘要: The electrochemical behavior of RuS/sub 2/ has been studied using cyclic voltammetry and Energy Dispersive X-ray Spectroscopy (EDX) techniques. Cyclic voltammograms reveal one major anodic peak and two major cathodic peaks on the reverse sweep; these peaks are attributed to the electroadsorption/desorption of OH/sup -/ groups on the electrode surface. It is proposed that the electroadsorption of the OH/sup -/ group on RuS/sub 2/ is due to the presence of Ru 4d electrons in the uppermost part of the valence band. Thus, OH/sup -/ is oxidized by holes on Ru 4d states in the first step. These groups are transferred to S/sub 2//sup 2-/ sites in the second step. EDX surface analysis reveals preferential release of S/sub 2//sup 2-/ from the pyrite lattice. A mechanism for the anodic dissolution of RuS/sub 2/ is proposed, according to which elemental sulfur is not a direct product, but rather the end product which forms from thiosulfate.
- 英文摘要: --
- 中文關鍵字: Ruthenium Disulfide; Dissolution; Mechanism; Electrochemical Behavior; Cyclic Voltammetry; X-Ray Spectroscopy; Single Crystal Electrode
- 英文關鍵字: 二硫化釕;溶解;機構;電化學行為;伏安法;X射線光譜學;單晶電極