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石墨气体扩散电极的制备与性能优化

Keywords: 石墨/PTFE电极,造孔剂,稀土,温度,H2O2

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Abstract:

电极的制备工艺及参数直接影响电极材料的活性。主要考察了C/PTFE质量比、碾压压力、煅烧温度、造孔剂NH4HCO3及稀土掺杂等因素对电极产出H2O2的影响规律。研究结果表明,电极最佳制备条件为:石墨和PTFE质量比为2:1、石墨、造孔剂和稀土元素质量比为6:1:1、碾压压力10MPa、煅烧温度330℃。在pH=3、电解质Na2SO4浓度为0.05mol/L条件下,电解2h后,改性电极产生的H2O2从95mg/L提高到350mg/L,提高了268.4%。

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