KINETIC STUDIES OF OXYGEN-PEROXIDE COUPLE ON PYROLYTIC GRAPHITE
KINETIC STUDIES OF OXYGEN-PEROXIDE COUPLE ON PYROLYTIC GRAPHITE
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DOI：
10.1016/0013-4686(70)80037-8
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发表时间：
1970-01-01
影响因子：
6.6
通讯作者：
YEAGER, E
中科院分区：
文献类型：
--
作者：
MORCOS, I;YEAGER, E
用转盘法研究了氧-过氧化氢对在碱性溶液中对普通热解石墨、高压热解石墨和单晶石墨的阴极和阳极性能。取向石墨解理面上O2的还原和过氧化氢的氧化均受到抑制。这种行为的差异归因于在解理表面上缺乏反应物种和/或中间体的合适的吸附位置。电流/电位数据、反应级数和化学计量比数支持以下机理：O2→O2(ADS)；O2(ADS)+HOH+e→HO2(ADS)+OH−；2HO2(ADS)+OH−→HO2−+O2+HOH，阴极还原的第一步和第二步速率控制。
The cathodic and anodic properties of the oxygen—peroxide couple have been studied on ordinary pyrolytic graphite, high-pressure annealed pyrolytic graphite and single crystal graphite in alkaline solutions using the rotating disk technique. Both the reduction of O2and oxidation of peroxide are inhibited on the cleavage surface of the oriented graphite relative to the edge surface. This difference in behaviour is attributed to the lack of suitable adsorption sites on the cleavage surface for the reacting species and/or intermediates. The current/potential data, reaction orders, and stoichiometric number support the following mechanism: O2→ O2(ads); O2(ads) + HOH +e→ HO2(ads) + OH−; 2HO2(ads) + OH−→ HO2−+ O2+ HOH, with the first and second steps rate-controlling for the cathodic reduction.