Fabrication of a porous Co0.85Se/rGO composite for efficient hydrazine oxidation

The development of efficient and earth-abundant catalysts for hydrazine oxidation (HzOR) is of great significance for direct hydrazine fuel cell. In the present study, we report Co 0.85 Se/rGO electrocatalyst with nanoporous structure on rGO surface via electrodeposition. In comparison with Co 0.85...

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Veröffentlicht in:Ionics 2023-11, Vol.29 (11), p.4817-4824
Hauptverfasser: Ren, Lili, Xie, Erwei, Qiao, Yonglian, Liu, Chen, Zhang, Xuefeng, Zhou, Shilei, Feng, Zhongbao
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Sprache:eng
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Zusammenfassung:The development of efficient and earth-abundant catalysts for hydrazine oxidation (HzOR) is of great significance for direct hydrazine fuel cell. In the present study, we report Co 0.85 Se/rGO electrocatalyst with nanoporous structure on rGO surface via electrodeposition. In comparison with Co 0.85 Se and nickel foam, Co 0.85 Se/rGO exhibits good hydrazine oxidation performance. A large current density of 981 mA cm −2 at 0.6 V vs reversible hydrogen electrode, a low Tafel slope of 56.2 mV dec −1 , almost 100% selectivity toward the complete hydrazine oxidation, and a high retention rate of 92.5% at a large current density of 50 mA cm −2 during 24 h measurement can be observed, which is among the best values for Co-based HzOR catalysts that recently reported. Furthermore, the enhanced electrochemical mechanism of Co 0.85 Se/rGO toward HzOR was investigated, mainly contributed to its well-maintained nanoporous structure, larger electrochemically active surface area, high electrical conductivity, and superaerophobic nature of nanoporous surface.
ISSN:0947-7047
1862-0760
DOI:10.1007/s11581-023-05211-8