Unitized Regenerative Alkaline Microfluidic Cell Based on Platinum Group Metal-Free Electrode Materials,ACS Applied Energy Materials

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Unitized Regenerative Alkaline Microfluidic Cell Based on Platinum Group Metal-Free Electrode Materials
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-07-07 00:00:00 , DOI: 10.1021/acsaem.0c00788
Carlos A. Campos-Roldán _{1,

2} , Haihong Zhong _{1,

3} , Sreekuttan M. Unni ₄ , Rosa de Guadalupe González-Huerta ₂ , Yongjun Feng ₃ , Nicolas Alonso-Vante ₁

Affiliation

The performance of platinum group metal (PGM)-free bifunctional electrodes, in a regenerative H₂/O₂ microfluidic cell, is examined. The system is operated in an alkaline environment at 25 °C. Multiwalled carbon nanotube (CNT)-supported Ni-based nanostructures, NiO–Ni/CNT, were used to catalyze the hydrogen evolution reaction (HER) and the hydrogen oxidation reaction (HOR), whereas N-doped carbon nanohorn-supported NiFeO_x–CoN_y (NiFeO_x–CoN_y/NCNH) served as oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) catalysts. The system NiO–Ni/CNT||NiFeO_x–CoN_y/NCNH, at 25 °C, showed an interesting performance in fuel cell mode (ca. 15 mW cm^–2 at the maximum peak) and in electrolyzer mode (ca. 102 mW cm^–2 at 50 mA cm^–2). The round-trip efficiency, after five consecutive operating cycles, decreased from 44.76 to 39.52%.

中文翻译：

基于铂族无金属电极材料的单元再生碱性微流控电池

在再生的H ₂ / O ₂微流电池中，检查了无铂族金属（PGM）的双功能电极的性能。该系统在25°C的碱性环境中运行。碳纳米管（CNT）负载的镍基纳米结构NiO–Ni / CNT被用来催化氢析出反应（HER）和氢氧化反应（HOR），而氮掺杂的碳纳米角负载的NiFeO _x –的CoN _ÿ（NiFeO _X -CON _ý / NCNH）用作析氧反应（OER）和氧还原反应（ORR）催化剂。NiO–Ni / CNT || NiFeO _x –CoN _y系统/ NCNH在25°C时在燃料电池模式（最大峰值约15 mW cm ^–2）和电解模式（在50 mA cm ^–2约102 mW cm ^–2）下表现出有趣的性能。经过五个连续的操作循环后，往返效率从44.76％下降至39.52％。

更新日期：2020-07-07

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