Chemical modification of the surface of pyrolytic graphite专利检索-伏安法机电学专利检索查询-专利查询网

Chemical modification of the surface of pyrolytic graphite

阅读：591发布：2022-03-11

专利汇可以提供Chemical modification of the surface of pyrolytic graphite专利检索，专利查询，专利分析的服务。并且This invention relates to chemically modifying the surface of pyrolytic graphite by hydrogen terminating, then mercurating, the peripheral carbon atoms of the surface. The modified surface can be electroplated with mercury to provide a thin, continuous, coherent film on the chemically modified surface. The resulting graphite supported mercury film is useful as an electrode, particularly for electroanalytical techniques such as anodic or cathodic stripping voltammetry.，下面是Chemical modification of the surface of pyrolytic graphite专利的具体信息内容。

权利要求

1. THE PROCESS PF CHEMICALLY MODIFYING THE SURFACE OF PYROLYTIC GRAPHITE WHICH COMPRISES (A) HYDROGENATING THE SURFACE TO TERMINATE PERIPHERAL CARBON ATOMS WITH HYDROGEN, AND (B) MERCURATING THE HYDROGENATED SURFACE BY CONTACTION SAID SURFACE WITH A SOLUTION OF A MERCURY (11) SALT SELECTED FROM THE GROUP CONSISTING OF MERCURIC ACETATE, NITRATE AND PERCHLORATE IN AN ACIDIC REACTION SELECTED FROM THE GROUP CONSISTING OF ACETIC, ACETIC-PERCHLORIC, TRIFUOROACETIC AND METHANE SULFONIC ACIIDS AND MIXTURES OF SAID ACIDS WITH THE ANHYDRIDES THEREOF TO REPLACE SOME OF THE TERMINATING HYDROGEN ATOMS WITH MERCURY (11)-CONTAINING GROUPS AND THUS TO CHEMICALLY BOND MERCURY TO SOME OF THE PERIPHERAL CARBON ATOMS OF THE GRAPHITE SURFACE.

2. The process of claim 1 in which the hydrogenation step is accomplished by heating pyrolytic graphite to a temperature of about 1,000*C. in an inert atmosphere, cooling to about 625* to about 725*C., treating with hydrogen, and cooling in an inert atmosphere.

3. The process of claim 1 in which the hydrogenation step is accomplished by abrading the surface of pyrolytic graphite in a liquid hydrocarbon having five to 20 carbon atoms in the absence of oxygen.

4. The process of claim 1 in which the hydrogenated surface is contacted with said solution of a mercury (II) salt for a period of time sufficient to bond to said surface from about 9 X 10 12 to about 1.3 X 10 9 gram atoms of mercury per geometric square centimeter of said surface.

5. The process of claim 4 in which the mercury (II) salt is mercuric perchlorate and the reaction medium is a mixture of trifluoracetic acid and trifluoroacetic anhydride.

6. An article having a surface of pyrolytic graphite containing mercury (II)-containing groups chemically bonded to some of the peripheral carbon atoms of said surface.

7. The article of claim 6 in which the amount of mercury in said mercury (II)-containing groups is from about 9 X 10 12 to about 1.3 X 10 9 gram atoms of mercury per geometric square centimeter of said surface.

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Chemical modification of the surface of pyrolytic graphite

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