TY - JOUR
T1 - Unitized Regenerative Alkaline Microfluidic Cell Based on Platinum Group Metal-Free Electrode Materials
AU - Campos-Roldán, Carlos A.
AU - Zhong, Haihong
AU - Unni, Sreekuttan M.
AU - González-Huerta, Rosa De Guadalupe
AU - Feng, Yongjun
AU - Alonso-Vante, Nicolas
N1 - Publisher Copyright:
© 2020 American Chemical Society.
PY - 2020/8/24
Y1 - 2020/8/24
N2 - 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 NiFeOx-CoNy (NiFeOx-CoNy/NCNH) served as oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) catalysts. The system NiO-Ni/CNT||NiFeOx-CoNy/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%.
AB - 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 NiFeOx-CoNy (NiFeOx-CoNy/NCNH) served as oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) catalysts. The system NiO-Ni/CNT||NiFeOx-CoNy/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%.
KW - PGM-free
KW - bifunctional catalysts
KW - hydrogen electrocatalyst
KW - layered double hydroxides
KW - nanostructure
KW - nickel/nickel oxide
KW - oxygen electrocatalyst
UR - http://www.scopus.com/inward/record.url?scp=85091057743&partnerID=8YFLogxK
U2 - 10.1021/acsaem.0c00788
DO - 10.1021/acsaem.0c00788
M3 - Artículo
AN - SCOPUS:85091057743
SN - 2574-0962
VL - 3
SP - 7397
EP - 7403
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
IS - 8
ER -