Electrochemical nitrate reduction in acid enables high-efficiency ammonia synthesis and high-voltage pollutes-based fuel cells

Most current research is devoted to electrochemical nitrate reduction reaction for ammonia synthesis under alkaline/neutral media while the investigation of nitrate reduction under acidic conditions is rarely reported. In this work, we demonstrate the potential of TiO 2 nanosheet with intrinsically...

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Vydáno v:Nature communications Ročník 14; číslo 1; s. 8036 - 11
Hlavní autoři: Zhang, Rong, Li, Chuan, Cui, Huilin, Wang, Yanbo, Zhang, Shaoce, Li, Pei, Hou, Yue, Guo, Ying, Liang, Guojin, Huang, Zhaodong, Peng, Chao, Zhi, Chunyi
Médium: Journal Article
Jazyk:angličtina
Vydáno: London Nature Publishing Group UK 05.12.2023
Nature Publishing Group
Nature Portfolio
Témata:
639/4077/4079/891
639/638/77/886
704/172/169/896
Ammonia
Catalysts
Chemical reduction
Chemical synthesis
Efficiency
Electrochemistry
Energy conversion
Fuel cells
Fuel technology
High voltages
Humanities and Social Sciences
Hydrazine
Hydrazines
Hydrogen evolution
Iron
Metal phthalocyanines
multidisciplinary
Nitrate reduction
Nitrates
Open circuit voltage
Science
Science (multidisciplinary)
Sulfur
Titanium dioxide
Voltage
ISSN:2041-1723, 2041-1723
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Shrnutí:Most current research is devoted to electrochemical nitrate reduction reaction for ammonia synthesis under alkaline/neutral media while the investigation of nitrate reduction under acidic conditions is rarely reported. In this work, we demonstrate the potential of TiO 2 nanosheet with intrinsically poor hydrogen-evolution activity for selective and rapid nitrate reduction to ammonia under acidic conditions. Hybridized with iron phthalocyanine, the resulting catalyst displays remarkably improved efficiency toward ammonia formation owing to the enhanced nitrate adsorption, suppressed hydrogen evolution and lowered energy barrier for the rate-determining step. Then, an alkaline-acid hybrid Zn-nitrate battery was developed with high open-circuit voltage of 1.99 V and power density of 91.4 mW cm –2 . Further, the environmental sulfur recovery can be powered by above hybrid battery and the hydrazine-nitrate fuel cell can be developed for simultaneously hydrazine/nitrate conversion and electricity generation. This work demonstrates the attractive potential of acidic nitrate reduction for ammonia electrosynthesis and broadens the field of energy conversion. Research on electrochemical nitrate reduction to ammonia in acidic conditions has been less extensive than that conducted in alkaline conditions. Here, the authors report a hybrid of iron phthalocyanine and TiO 2 catalyst with improved efficiency toward acidic nitrate reduction and its application in Zn-nitrate batteries and high-voltage pollutes-based fuel cell.
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ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-023-43897-6