活性炭SCN-3Mによる,パラジウム錯イオン水溶液からのパラジウムの固定に及ぼす化学吸着した酸素の役割 Role of Chemisorbed Oxygen in Fixation of Palladium by an Activated Carbon, SCN-3M, from Aqueous Solution of its Complex Ion

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Abstract

<p>When the grains of an activated carbon (AC) came to contact with deaerated aqueous solution of tetrachloropalladate ions (TCPI), their surface was covered by a thin porous layer of metallic Pd. The deposited Pd remained unchanged for a long time on the grains. In the aerated solution of the same composition two different processes were observed. The first was deposition of a similar layer of metallic Pd on the external surface of the grains, followed by expansion and vanishing of a Pd-containing layer from the surface of the grains into their cores. The second was gradual fixation of Pd atoms on the external and the internal surface of the AC grains by mechanisms other than reduction of TCPI, likely by mechanisms of ion-exchange. The observed two processes were discussed with regards to the chemisorbed oxygen atoms on the external and the internal surface of the AC, which caused change of electrode potential as well as acquisition of ion-exchange ability.</p>

Journal

  • Electrochemistry

    Electrochemistry 70(5), 316-321, 2002-05-05

    The Electrochemical Society of Japan

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Codes

  • NII Article ID (NAID)
    10008223521
  • NII NACSIS-CAT ID (NCID)
    AN00151637
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    13443542
  • NDL Article ID
    6128440
  • NDL Source Classification
    ZP1(科学技術--化学・化学工業)
  • NDL Call No.
    Z17-14
  • Data Source
    CJP  NDL  J-STAGE 
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