Remarkable enhancement of the specific activities of Pt catalysts to methanol oxidation through tuning the surface properties of supporting materials by fast microwave treatments
Remarkable enhancement of the specific activities of Pt catalysts to methanol oxidation through tuning the surface properties of supporting materials by fast microwave treatments
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DOI：
10.1016/j.ijhydene.2016.03.036
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发表时间：
2016-04
影响因子：
7.2
通讯作者：
Qiong Xue;Zhi-Yong Yang
中科院分区：
文献类型：
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作者：
Qiong Xue;Zhi-Yong Yang
合成了还原氧化石墨烯(RGO)/酚醛(PF)树脂杂化材料，并对其进行了微波加热处理。负载在这些RGO/PF载体上的铂颗粒对甲醇氧化反应(MOR)的比活性(SA)显著高于商品铂/C催化剂。在所有制备的催化剂中，经微波处理中等时间的RGO/PF催化剂的SA值最高，是铂/C催化剂的3倍以上。表面分析表明，经微波处理中等时间的RGO/PF催化剂的总氧、羰基和羧基含量最高。结合表面分析和静曲强度测试数据，我们推断支撑材料表面性质的微调是SA大幅提高的关键。我们的结果证实了衬底表面性质对铂催化剂性能的重要影响，并为开发高活性和低成本的燃料电池催化剂提供了一条可观的途径。
The hybrid material of reduced graphene oxide (RGO)/phenol formaldehyde (PF) resol is synthesized and treated different time by microwave (MW) heating. Pt particles loaded on these RGO/PF substrates demonstrate remarkably enhanced specific activity (SA) to methanol oxidation reaction (MOR) in comparison with the commercial Pt/C. Among all the prepared catalysts, the one containing the RGO/PF with middle time of MW treatment shows highest SA value, more than three times of Pt/C. The surface analysis reveals that the RGO/PF with middle time of MW treatment contains highest content of total oxygen, carbonyl and carboxyl groups. Examining the data of surface analysis and MOR testing together, we inferred that the fine-tuned surface properties of supporting materials are the key role for the great enhancing of SA. Our results verify the crucial influence of substrate surface properties on the performances of Pt catalysts and provide a considerable way to develop high active and low cost catalysts for fuel cell.