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用于尿素/氧燃料电池中氧还原的石墨烯气凝胶负载的锰铁氧化物的合成与评价

Synthesis and Evaluation of Graphene Aerogel-Supported MnFeO for Oxygen Reduction in Urea/O Fuel Cells.

作者信息

Bejigo Keyru Serbara, Park Bang Ju, Kim Ji Hyeon, Yoon Hyon Hee

机构信息

Department of Chemical and Biological Engineering Gachon University 1342 Seongnam-daro Seongnam S. Korea.

Department of Electronic Engineering Gachon University 1342 Seongnam-daro Seongnam S. Korea.

出版信息

ChemistryOpen. 2019 May 14;8(5):615-620. doi: 10.1002/open.201900105. eCollection 2019 May.

DOI:10.1002/open.201900105
PMID:31114747
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6515475/
Abstract

Graphene aerogel-supported manganese ferrite (MnFeO/GAs) and reduced-graphene oxide/manganese ferrite composite (MnFeO/rGO) were synthesized and studied as cathode catalysts for oxygen reduction reactions in urea/O fuel cells. MnFeO/GAs exhibited a 3D framework with a continuous macroporous structure. Among the investigated Fe/Mn ratios, the more positive oxygen reduction onset potential was observed with Fe/Mn=2/1. The half-wave potential of MnFeO/GAs was considerably more positive than that of MnFeO/rGO and comparable with that of Pt/C, while the stability of MnFeO/GAs significantly higher than that of Pt/C. The best urea/O fuel cell performance was also observed with the MnFeO/GAs. The MnFeO/GAs exhibited an OCV of 0.713 V and a maximum power density of 1.7 mW cm at 60 °C. Thus, this work shows that 3D structured graphene aerogel-supported MnFeO catalysts can be used as an efficient cathode material for alkaline fuel cells.

摘要

合成了石墨烯气凝胶负载的锰铁氧体（MnFeO/GAs）和还原氧化石墨烯/锰铁氧体复合材料（MnFeO/rGO），并将其作为尿素/O燃料电池中氧还原反应的阴极催化剂进行了研究。MnFeO/GAs呈现出具有连续大孔结构的三维框架。在所研究的铁/锰比例中，当铁/锰 = 2/1时，观察到更正向的氧还原起始电位。MnFeO/GAs的半波电位比MnFeO/rGO的半波电位明显更正，且与Pt/C的半波电位相当，而MnFeO/GAs的稳定性显著高于Pt/C。使用MnFeO/GAs时也观察到了最佳的尿素/O燃料电池性能。在60°C时，MnFeO/GAs的开路电压为0.713 V，最大功率密度为1.7 mW cm²。因此，这项工作表明，三维结构化的石墨烯气凝胶负载的MnFeO催化剂可用作碱性燃料电池的高效阴极材料。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08dc/6515475/98a27537462b/OPEN-8-615-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08dc/6515475/701f2715eb4c/OPEN-8-615-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08dc/6515475/8768cab463b9/OPEN-8-615-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08dc/6515475/eb97f3f35e8a/OPEN-8-615-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08dc/6515475/6d493f0831a7/OPEN-8-615-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08dc/6515475/ed27e61a1a68/OPEN-8-615-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08dc/6515475/a67718ff2eab/OPEN-8-615-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08dc/6515475/98a27537462b/OPEN-8-615-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08dc/6515475/701f2715eb4c/OPEN-8-615-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08dc/6515475/8768cab463b9/OPEN-8-615-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08dc/6515475/eb97f3f35e8a/OPEN-8-615-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08dc/6515475/6d493f0831a7/OPEN-8-615-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08dc/6515475/ed27e61a1a68/OPEN-8-615-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08dc/6515475/a67718ff2eab/OPEN-8-615-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08dc/6515475/98a27537462b/OPEN-8-615-g007.jpg

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