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Room-Temperature Electrocatalytic Synthesis of NH3 from H2O and N-2 in a Gas-Liquid-Solid Three-Phase Reactor
Chen, Shiming1,2,3,4; Perathoner, Siglinda1,2,3; Ampelli, Claudio1,2,3; Mebrahtu, Chalachew1,2,3,4; Su, Dangsheng5; Centi, Gabriele1,2,3
关键词N-2 Activation Nh3 Synthesis Electrocatalysis Fe/cnt Electrocatalytic Reactor
刊名ACS SUSTAINABLE CHEMISTRY & ENGINEERING
2017-08-01
DOI10.1021/acssuschemeng.7b01742
5期:8页:7393-7400
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Multidisciplinary ; Engineering, Chemical
研究领域[WOS]Chemistry ; Engineering
关键词[WOS]ELECTROCHEMICAL SYNTHESIS ; ATMOSPHERIC-PRESSURE ; AMMONIA
英文摘要Fe2O3-CNT samples are studied for the room temperature electrocatalytic synthesis of NH3 from H2O and N-2 in a gas-liquid-solid three-phase reactor. A 30 wt % iron-oxide loading was found to be optimal. The performances greatly depend on the cell design, where the possibility of ammonia crossover through the membrane has to be inhibited. The reaction conditions also play a significant role. The effect of electrolyte (type, pH, concentration) was investigated in terms of current density, rate of ammonia formation, and Faradaic efficiency in continuous tests up to 24 h of time on stream. A complex effect of the applied voltage was observed. An excellent stability was found for an applied voltage of -1.0 V vs Ag/AgCl. At higher negative applied voltages, the ammonia formation rate and Faradaic selectivity are higher, but with a change of the catalytic performances, although the current densities remain constant for at least 24 h. This effect is interpreted in terms of reduction of the iron-oxide species above a negative voltage threshold, which enhances the side reaction of H+/e(-) recombination to generate H-2 rather than their use to reduce activated N-2 species, possibly located at the interface between iron-oxide and functionalized CNTs.
语种英语
WOS记录号WOS:000407410900114
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文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/149984
专题中国科学院大连化学物理研究所
作者单位1.Univ Messina, Dept MIFT, ERIC Aisbl, Vle F Stagno DAlcontres 31, I-98166 Messina, Italy
2.Univ Messina, Dept ChiBioFarAM Ind Chem, ERIC Aisbl, Vle F Stagno DAlcontres 31, I-98166 Messina, Italy
3.INSTM CASPE, Vle F Stagno DAlcontres 31, I-98166 Messina, Italy
4.Rhein Westfal TH Aachen, ITMC, Lehrstuhl Heterogene Katalyse & Tech Chem, Worringerweg 2, D-52074 Aachen, Germany
5.Chinese Acad Sci, Dalian Inst Chem Phys, 457 Zhongshan Rd, Dalian 116023, Peoples R China
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Chen, Shiming,Perathoner, Siglinda,Ampelli, Claudio,et al. Room-Temperature Electrocatalytic Synthesis of NH3 from H2O and N-2 in a Gas-Liquid-Solid Three-Phase Reactor[J]. ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2017,5(8):7393-7400.
APA Chen, Shiming,Perathoner, Siglinda,Ampelli, Claudio,Mebrahtu, Chalachew,Su, Dangsheng,&Centi, Gabriele.(2017).Room-Temperature Electrocatalytic Synthesis of NH3 from H2O and N-2 in a Gas-Liquid-Solid Three-Phase Reactor.ACS SUSTAINABLE CHEMISTRY & ENGINEERING,5(8),7393-7400.
MLA Chen, Shiming,et al."Room-Temperature Electrocatalytic Synthesis of NH3 from H2O and N-2 in a Gas-Liquid-Solid Three-Phase Reactor".ACS SUSTAINABLE CHEMISTRY & ENGINEERING 5.8(2017):7393-7400.
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