Development of tellurium-modified carbon catalysts for oxygen reduction reaction in PEM fuel cells
Development of tellurium-modified carbon catalysts for oxygen reduction reaction in PEM fuel cells
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DOI：
10.1016/j.jpowsour.2008.04.017
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发表时间：
2008-07
影响因子：
9.2
通讯作者：
Xuguang Li;Lingyun Liu;Jong‐Won Lee;B. Popov
中科院分区：
文献类型：
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作者：
Xuguang Li;Lingyun Liu;Jong‐Won Lee;B. Popov
采用碲酸化学还原、高温热解的方法制备了碲(Te)修饰碳催化剂，用于氧还原反应。结果表明，该催化剂对氧还原反应具有较高的活性。高温热解对催化剂活性中心的形成起着至关重要的作用。当裂解温度为1000℃时，催化剂的氧还原起始电位高达0.78V vs.NHE，氧还原时生成的过氧化氢不到1%。并对用Te修饰碳催化剂制备的膜-电极组件的性能进行了评价。
Tellurium (Te)-modified carbon catalyst for oxygen reduction reaction was prepared through chemical reduction of telluric acid followed by the pyrolysis process at elevated temperatures. The catalyst was found to be active for oxygen reduction reaction. High-temperature pyrolysis plays a crucial role in the formation of the active sites of the catalysts. When the pyrolysis was conducted at 1000°C, the catalyst exhibited the onset potential for oxygen reduction as high as 0.78V vs. NHE and generated less than 1% H2O2during oxygen reduction. The performance of the membrane–electrode assembly prepared with the Te-modified carbon catalyst was also evaluated.