無水フッ化水素で表面改質したLaNi_<5-x>Al_x(x=0, 0.3)の水素化・脱水素化特性に及ぼすCOの影響 Effect of CO on the Cyclic Hydriding-Dehydriding Characteristics of the LaNi_<5-x>Al_x(x=0, 0.3)Alloys Treated by Anhydrous Hydrogen Fluoride

この論文にアクセスする

この論文をさがす

著者

抄録

Hydrogen storage alloys exhibit reversible high-rate hydrogen absorption and desorption reactions. The hydrogen storage density of the alloys is higher than that liquid H<sub>2</sub>. The exposure of the alloys to impurity gases such as O<sub>2</sub>, CO, CO<sub>2</sub>, and H<sub>2</sub>O readily reduces reactivity with H<sub>2</sub> gas. In this study, the surface of LaNi<sub>5-x</sub>Al<sub>x</sub> alloy was treated using anhydrous hydrogen fluoride to examine the effect of CO on fluorinated alloy H<sub>2</sub> reactivity. This HF treatment effectively reduced alloy surface poisoning by CO. Compared with the initial transfer, the HF-treated alloy still exhibited 80% hydrogen transfer after 100-cycle hydriding-dehydriding reactions in a H<sub>2</sub> gas including 1000ppm CO, while the transfer became zero for untreated alloy after five hydriding-dehydriding cycles. AES analysis of HF-treated samples showed that the HF treatment induced the surface segregation of Ni and F atoms where almost no La atoms was detected. The concentration of La atoms was found to increase with depth, in which a mixed region of La, Ni, Al, F, and O atoms was formed. This fluorinated surface layer seems to function both to prevent surface CO poisoning and to act as a catalyst.

収録刊行物

  • 表面技術 = The Journal of the Surface Finishing Society of Japan

    表面技術 = The Journal of the Surface Finishing Society of Japan 48(12), 1212-1217, 1997-12-01

    The Surface Finishing Society of Japan

参考文献:  19件中 1-19件 を表示

  • <no title>

    UCHIDA H.

    J. Less-Common Met. 172-174, 983, 1991

    被引用文献7件

  • <no title>

    FROMM E.

    J. Less-Common Met. 131, 1, 1987

    被引用文献1件

  • <no title>

    UCHIDA H.

    J. Less-Common Met. 131, 125, 1987

    被引用文献1件

  • <no title>

    KIM Y. G.

    J. Less-Common Met. 144, 331, 1988

    被引用文献1件

  • <no title>

    HIRAT T.

    J. Less-Common Met. 136, 217, 1988

    被引用文献1件

  • <no title>

    IMOTO T.

    J. Alloys and Compounds. 223, 60, 1995

    被引用文献3件

  • <no title>

    GUIDOTTI R. A.

    J. Less-Common Met. 52, 13, 1977

    被引用文献1件

  • <no title>

    GOODELL P. D.

    J. Less-Common Met. 89, 45, 1983

    被引用文献3件

  • <no title>

    EISENBERG F. G.

    J. Less-Common Met. 89, 55, 1983

    被引用文献1件

  • <no title>

    BLOCK F. R.

    J. Less-Common Met. 89, 77, 1983

    被引用文献1件

  • <no title>

    SANDROCK G. D.

    J. Less-Common Met. 104, 159, 1984

    被引用文献3件

  • <no title>

    ISIKAWA H.

    J. Less-Common Met. 120, 123, 1986

    被引用文献2件

  • <no title>

    WANG X. -L.

    J. Alloys and Compounds 231, 380, 1995

    被引用文献2件

  • <no title>

    伊藤学

    表面技術 48, 565, 1997

    被引用文献3件

  • <no title>

    WANG X.-L.

    J. Alloys and Compounds 231, 860, 1995

    被引用文献2件

  • <no title>

    伊藤学

    表面技術 48, 1207, 1997

    被引用文献1件

  • <no title>

    COVIN R.

    J. Catal. 7, 126, 1967

    被引用文献1件

  • <no title>

    KOWALAK S.

    Acta Chim. Acad. Sci. Hung. Tomuus 107(1), 19, 1981

    被引用文献1件

  • <no title>

    MATUMOTO S.

    Bulletin of the Chemical Society of Japan 3, 313, 1979

    被引用文献1件

被引用文献:  1件中 1-1件 を表示

各種コード

  • NII論文ID(NAID)
    10002260609
  • NII書誌ID(NCID)
    AN1005202X
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09151869
  • NDL 記事登録ID
    4367244
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-291
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
ページトップへ