Mass production of highly loaded and highly dispersed PtRu/C catalysts for methanol oxidation using an electron-beam irradiation reduction method
Mass production of highly loaded and highly dispersed PtRu/C catalysts for methanol oxidation using an electron-beam irradiation reduction method
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DOI：
10.1080/17458080.2015.1031197
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发表时间：
2016-01-22
影响因子：
2.8
通讯作者：
Yamamoto, Takao A.
中科院分区：
文献类型：
--
作者：
Ohkubo, Yuji;Kageyama, Satoru;Yamamoto, Takao A.
电子束照射还原法（EBIRM）是通过用高能电子束照射来还原水溶液中的金属离子的技术。在这项研究中，EBIRM的改进，开发一种技术，用于大规模生产的高负载和高分散的PtRu/C催化剂用作直接甲醇燃料电池阳极。Pt和Ru输入浓度的增加使负载重量从9重量%增加到37重量%;然而，PtRu纳米颗粒在碳颗粒上的分散性降低。为了改善低结晶度，在前驱体溶液中加入次磷酸钠，并减少碳颗粒的投入量。这些变化导致不仅高负载而且高分散的PtRu/C催化剂。高负载、高分散PtRu/C催化剂的甲醇氧化活性在所有电压范围内都是低负载、低分散PtRu/C催化剂的1.6倍以上。相对容易地获得大于6000 mg的高负载和高分散的PtRu/C催化剂，并且PtRu纳米颗粒的平均粒径为1.8 nm。这些结果表明，改进的EBIRM是有效的碳负载，高负载，高分散的金属纳米粒子的大规模生产。
An electron-beam irradiation reduction method (EBIRM) is a technique to reduce metal ions in an aqueous solution via irradiation with a high-energy electron beam. In this study, an EBIRM is improved to develop a technique for the mass production of highly loaded and highly dispersed PtRu/C catalysts for use as direct methanol fuel cell anodes. An increase in the Pt and Ru input concentrations increased the loading weight from 9 to 37 wt%; however, the dispersibility of the PtRu nanoparticles on the carbon particles decreased. To improve the low dispersibility, sodium phosphinate was added to the precursor solution and the input amount of carbon particles was decreased. These changes resulted in not only highly loaded but also highly dispersed PtRu/C catalysts. The catalytic activity of the highly loaded and highly dispersed PtRu/C catalysts for methanol oxidation was at least 1.6 times higher than that of the lowly loaded and lowly dispersed PtRu/C catalysts in all voltage range. More than 6000 mg of highly loaded and highly dispersed PtRu/C catalysts were relatively easily obtained, and the average particle size of the PtRu nanoparticles was 1.8 nm. These results demonstrated that the improved EBIRM is effective for the mass production of carbon-supported, highly loaded, and highly dispersed metal nanoparticles.