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Continuous Flow Synthesis of Platinum Nanoparticles in Porous Carbon as Durable and Methanol‐Tolerant Electrocatalysts for the Oxygen Reduction Reaction
ChemElectroChem ( IF 3.5 ) Pub Date : 2017-11-03 , DOI: 10.1002/celc.201700998 Carlota Domínguez 1 , Kevin M. Metz 2 , Md. Khairul Hoque 1 , Michelle P. Browne 1 , Leticia Esteban-Tejeda 1 , Corbin K. Livingston 2 , Suoyuan Lian 1 , Tatiana S. Perova 3, 4 , Paula E. Colavita 1
ChemElectroChem ( IF 3.5 ) Pub Date : 2017-11-03 , DOI: 10.1002/celc.201700998 Carlota Domínguez 1 , Kevin M. Metz 2 , Md. Khairul Hoque 1 , Michelle P. Browne 1 , Leticia Esteban-Tejeda 1 , Corbin K. Livingston 2 , Suoyuan Lian 1 , Tatiana S. Perova 3, 4 , Paula E. Colavita 1
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The development and commercialization of direct methanol fuel cells (DMFCs) as energy conversion devices remains a challenge despite their advantages in terms of energy density and energy‐conversion efficiency. The bottleneck for the development of DMFCs is mainly caused by the sluggish kinetics of the oxygen reduction reaction (ORR) at the cathode of fuel cells, and the effect of the so‐called methanol crossover in state‐of‐the‐art Pt/C electrocatalysts. Herein, we report for the first time an easily scalable continuous flow method based on ultraspray pyrolysis (USP) for the preparation of Pt nanoparticles directly embedded on highly porous carbon spheres. A study on the effect that post‐synthesis treatment procedures have on the level of graphitization and catalytic properties is described. Use of USP results in a substantial reduction of the final Pt content with respect to typical Pt/C electrocatalysts, while yielding also excellent durability and tolerance to methanol crossover under acidic conditions. These results demonstrate that the USP method reported herein is a good candidate for its use in the preparation of ORR catalysts in commercial applications.
中文翻译：
连续碳在多孔碳中连续流动合成耐久和耐甲醇的氧还原反应催化剂
尽管直接甲醇燃料电池（DMFC）在能量密度和能量转换效率方面具有优势，但直接甲醇燃料电池（DMFC）作为能量转换设备的开发和商业化仍面临挑战。DMFC发展的瓶颈主要是由于燃料电池阴极处的氧还原反应（ORR）动力学缓慢，以及所谓的甲醇交叉作用对最新技术Pt / C的影响。电催化剂。本文中，我们首次报道了一种基于超喷雾热解（USP）的易于扩展的连续流方法，用于制备直接嵌入高度多孔碳球中的Pt纳米颗粒。描述了对合成后处理程序对石墨化水平和催化性能的影响的研究。与典型的Pt / C电催化剂相比，USP的使用导致最终Pt含量的大幅降低，同时在酸性条件下还具有出色的耐久性和对甲醇穿透的耐受性。这些结果证明，本文报道的USP方法是其在商业应用中制备ORR催化剂中使用的良好候选者。
更新日期：2017-11-03
中文翻译：
连续碳在多孔碳中连续流动合成耐久和耐甲醇的氧还原反应催化剂
尽管直接甲醇燃料电池（DMFC）在能量密度和能量转换效率方面具有优势，但直接甲醇燃料电池（DMFC）作为能量转换设备的开发和商业化仍面临挑战。DMFC发展的瓶颈主要是由于燃料电池阴极处的氧还原反应（ORR）动力学缓慢，以及所谓的甲醇交叉作用对最新技术Pt / C的影响。电催化剂。本文中，我们首次报道了一种基于超喷雾热解（USP）的易于扩展的连续流方法，用于制备直接嵌入高度多孔碳球中的Pt纳米颗粒。描述了对合成后处理程序对石墨化水平和催化性能的影响的研究。与典型的Pt / C电催化剂相比，USP的使用导致最终Pt含量的大幅降低，同时在酸性条件下还具有出色的耐久性和对甲醇穿透的耐受性。这些结果证明，本文报道的USP方法是其在商业应用中制备ORR催化剂中使用的良好候选者。
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