Basische Oberflächenoxide auf Kohlenstoff-III. Aktiver Wasserstoff und polare Adsorptionszentren
Basische Oberflächenoxide auf Kohlenstoff-III. Aktiver Wasserstoff und polare Adsorptionszentren
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DOI：
10.1016/0008-6223(71)90027-3
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发表时间：
1971-08
期刊：
影响因子：
10.9
通讯作者：
M. Voll;H. Boehm
中科院分区：
文献类型：
--
作者：
M. Voll;H. Boehm
采用重量法，用D2O交换氘法测定了碳表面碱性氧化物以氢氧化物形式存在的活性氢。在120℃放气过程中，样品重量下降非常缓慢，3天后样品重量保持不变时，已无活性氢残留。这种脱水是不可逆的。试图通过吸附技术确定表面的极性基团是不成功的。研究了糖炭和炭黑对H2O、HCl、alcl3和bf3的物理吸附。
Active hydrogen on carbon surfaces covered with basic surface oxides in the hydroxide form was measured by deuterium exchange with D2O using a gravimetric technique. There was a very slow decrease in sample weight during outgassing at 120°C, and there was no active hydrogen left when the weight became constant after three days. This dehydration was irreversible. Attempts to determine polar groups on the surface by adsorption techniques were unsuccessful. Physical adsorption of H2O, HCl, AlCl3and BF3was studied using sugar charcoal and carbon black.