文章基本信息

标题：Nano Conductive Ceramic Wedged Graphene Composites as Highly Efficient Metal Supports for Oxygen Reduction
本地全文：下载
作者：Peng Wu ; Haifeng Lv ; Tao Peng 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：4
期号：1
DOI：10.1038/srep03968
语种：English
出版社：Springer Nature
摘要：A novel conductive ceramic/graphene nanocomposite is prepared to prohibit the re-stacking of reduced graphene oxide (RGO) by wedging zirconium diboride (ZrB₂) nanoparticles (NPs) into multiple layer nanosheets using a simple solvothermal method. Surprisingly, the RGO/ZrB₂ nanocomposite supported Pt NPs shows very excellent catalytic activity. Its electrochemical surface area (ECSA) is up to 148 m²g⁻¹ (very approaches the geometry surface area of 155 m²g⁻¹), much greater than that of the previous report (usually less than 100 m²g⁻¹). The mass activity is as high as 16.8 A/g⁻¹, which is almost 2 times and 5 times that of Pt/RGO (8.6 A/g⁻¹) and Pt/C (3.2 A/g⁻¹), respectively, as benchmarks. Moreover, after 4000 cycles the catalyst shows only 61% of ECSA loss, meaning a predominantly electrochemical stability. The remarkably improved electrochemical properties with much high Pt utilization of the new catalyst show a promising application in low temperature fuel cells and broader fields.