CeO2 nanocubes-graphene oxide as durable and highly active catalyst support for proton exchange membrane fuel cell.
CeO2 nanocubes-graphene oxide as durable and highly active catalyst support for proton exchange membrane fuel cell.
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CeO2纳米立方体-氧化石墨烯作为质子交换膜燃料电池的耐用且高活性的催化剂载体
DOI：
10.1038/srep07415
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发表时间：
2014-12-10
影响因子：
4.6
通讯作者：
Wang YG
中科院分区：
文献类型：
--
作者：
Lei M;Wang ZB;Li JS;Tang HL;Liu WJ;Wang YG
质子交换膜燃料电池（PEMFC）性能的快速退化仍然是一个重大挑战。在这项工作中，我们开发了新型CeO 2纳米立方体-氧化石墨烯纳米复合材料作为质子交换膜燃料电池的耐用和高活性的催化剂载体。我们表明，使用CeO 2作为自由基清除剂的催化剂显着提高了催化剂的耐久性。Pt-氧化石墨烯-8重量%的催化活性保留率CeO 2纳米复合材料在0.8-1.23 V的高电压范围下经过5000次CV循环后达到高达69%，而Pt-氧化石墨烯复合材料为19%。Pt-CeO 2纳米立方体-氧化石墨烯催化剂的优异耐久性归因于CeO 2的自由基清除活性，其显著减缓了催化层中Nafion粘合剂的化学降解，然后抑制了Pt催化剂的衰变，从而导致Pt-CeO 2-氧化石墨烯纳米复合材料催化剂的优异循环寿命。此外，在本研究中，还记录和讨论了由Nafion 211膜和Pt-CeO 2-氧化石墨烯催化剂组装的单电池的性能，其中阴极中的CeO 2含量不同，以及阳极中的Pt-C催化剂。
Rapid degradation of cell performance still remains a significant challenge for proton exchange membrane fuel cell (PEMFC). In this work, we develop novel CeO2 nanocubes-graphene oxide nanocomposites as durable and highly active catalyst support for proton exchange membrane fuel cell. We show that the use of CeO2 as the radical scavenger in the catalysts remarkably improves the durability of the catalyst. The catalytic activity retention of Pt-graphene oxide-8 wt.% CeO2 nanocomposites reaches as high as 69% after 5000 CV-cycles at a high voltage range of 0.8-1.23 V, in contrast to 19% for that of the Pt-graphene oxide composites. The excellent durability of the Pt-CeO2 nanocubes-graphene oxide catalyst is attributed to the free radical scavenging activity of CeO2, which significantly slows down the chemical degradation of Nafion binder in catalytic layers, and then alleviates the decay of Pt catalysts, resulting in the excellent cycle life of Pt-CeO2-graphene oxide nanocomposite catalysts. Additionally, the performance of single cell assembled with Nafion 211 membrane and Pt-CeO2-graphene oxide catalysts with different CeO2 contents in the cathode as well as the Pt-C catalysts in the anode are also recorded and discussed in this study.
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影响因子：
4.9
作者：
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通讯作者：
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