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首页> 外文期刊>Electrocatalysis >In Situ ATR-FTIR Studies of Ethanol Electro-oxidation in Alkaline Medium on PtRh/C Electrocatalyst Prepared by an Alcohol Reduction Process
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In Situ ATR-FTIR Studies of Ethanol Electro-oxidation in Alkaline Medium on PtRh/C Electrocatalyst Prepared by an Alcohol Reduction Process

机译：醇还原法制备的PtRh / C电催化剂在碱性介质中乙醇电氧化的原位ATR-FTIR研究

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Anion exchange membrane fuel cell is a new chance to produce a functional and portable fuel cell; however, the studies are still at an early stage with few reports regarding the AEMFC. PtRh/C electrocatalysts with different Pt:Rh atomic ratios were prepared by an alcohol reduction process. X-ray diffraction patterns for all PtRh/C materials indicated no shift in Pt(fee) peaks showing that Rh did not incorporated into Pt lattice; however, the analysis of lattice parameter showed that some Pt atoms are added to Rh(fee) structure. The mean particle sizes were in the range of 4-5 nm. Electrochemical experiments showed that PtRh/C electrocatalyst with Pt:Rh atomic ratio of 70:30 had superior performance exhibiting a current density of 5.0 mA mg(metal)(-1). From in situ ATR-FTIR experiments, it was observed that PtRh/C electrocatalyst with Pt:Rh atomic ratio of 70:30 produced more acetate ions than other ones, while the material prepared with Pt:Rh atomic ratio of 50:50 was more selective to CO2 as observed in acid media.
机译：阴离子交换膜燃料电池是生产功能性便携式燃料电池的新机会。但是，该研究仍处于早期阶段，关于AEMFC的报道很少。通过醇还原法制备了具有不同Pt：Rh原子比的PtRh / C电催化剂。所有PtRh / C材料的X射线衍射图表明Pt（fee）峰没有移动，表明Rh没有掺入Pt晶格中。然而，晶格参数分析表明某些Pt原子被添加到Rh（fee）结构中。平均粒度在4-5nm范围内。电化学实验表明，Pt：Rh原子比为70:30的PtRh / C电催化剂具有优异的性能，电流密度为5.0 mA mg（金属）（-1）。从原位ATR-FTIR实验中发现，Pt：Rh原子比为70:30的PtRh / C电催化剂比其他离子产生更多的乙酸根离子，而Pt：Rh原子比为50:50的材料更多。在酸性介质中观察到对二氧化碳具有选择性。

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