| 低酸度下氟塑粘活性炭电极上氧还原为H_2O_2的电流效率 |
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| 引用本文： | 彭永元
,吴钰
,林绮玲
,梁小军.低酸度下氟塑粘活性炭电极上氧还原为H_2O_2的电流效率[J].华南师范大学学报(自然科学版),1987,0(1):1. |
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| 作者姓名： | 彭永元 吴钰 林绮玲 梁小军 |
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| 作者单位： | Peng Yongyuan，Wu Yu，Lin Qiling，Liang Xiaojun |
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| 摘 要： | 用恒电流电解法证实,氧在氟塑粘活性炭电极上还原为H_2O_2的电流效率,于0.5M H_2SO_4-2.5M(NH_4)_2SO_4中可达72.6%,比高酸度时为高.长时间电解时,累积浓度高于0.76M(2.3%),此时电流效率为58.1%.据试验,电流效率降低的主要原因,不在于H_2O_2在电极上的还原,而在于通过隔膜的扩散损失.
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| 关 键 词： | 恒电流电解 氧阴极还原 H_2O_2电流效率 氟塑粘碳电极 活性炭上氧的还原 氟塑粘多孔电极 |
THE CURRENT EFFICIENCY OF H_2O_2 FORMED IN O_2 CATHODIC REDUCTION IN LOW ACIDIC MEDIUM ON TEFLON BONDED ACTIVATED-CARBON ELECTRODE |
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| Peng Yongyuan,Wu Yu,Lin Qiling,Liang Xiaojun.THE CURRENT EFFICIENCY OF H_2O_2 FORMED IN O_2 CATHODIC REDUCTION IN LOW ACIDIC MEDIUM ON TEFLON BONDED ACTIVATED-CARBON ELECTRODE[J].Journal of South China Normal University(Natural Science Edition),1987,0(1):1. |
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| Authors: | Peng Yongyuan Wu Yu Lin Qiling Liang Xiaojun |
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| Abstract: | The current efficiency of H2O2 produced by O2 cathodic reduction in low acidic medium (from 3 M H2SO4 to 0.1M H2SO4 + 2.9M(NH4)2SO4)on the Teflon bonded porous electrode made of activated carbon was investigated using galvanostatic electroysls method. In a soIn containing 0.5M H2SO4 in 2.5M ( NH4 ) 2SO4, a value of 72.6% can be obtained which is higher than that in higher acidic soln. The cumulative cone, on: prolonged electrolysis is higher than 0.67M (2.3% ). Under this condition the yield is only 58.1%. But further tests show that the efficiency loss is chiefly due to the diffusion through the porous disphragm,not due to electrolytic reduction of H2O2. |
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| Keywords: | gavanostatic electrolysis O2 Cathodic reduction current efficiency of H2O2 Teflon-bonded carbon electrode O2 reduction on activadeted carbon Teflon bonded porous electrode |
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