Room-Temperature Electrocatalytic Synthesis of NH3 from H2O and N-2 in a Gas-Liquid-Solid Three-Phase Reactor

	Room-Temperature Electrocatalytic Synthesis of NH3 from H2O and N-2 in a Gas-Liquid-Solid Three-Phase Reactor
	Chen, Shiming 1,3,4,5; Perathoner, Siglinda 1,4,5; Ampelli, Claudio 1,4,5; Mebrahtu, Chalachew 1,3,4,5; Su, Dangsheng 2; Centi, Gabriele 1,4,5
刊名	ACS SUSTAINABLE CHEMISTRY & ENGINEERING
	2017-08-01
卷号	5 期号:8 页码:7393-7400
关键词	N-2 activation NH3 synthesis Electrocatalysis Fe/CNT Electrocatalytic reactor
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.
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
收录类别	SCI
语种	英语
WOS记录号	WOS:000407410900114
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/149884]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Univ Messina, Dept ChiBioFarAM Ind Chem, ERIC Aisbl, Vle F Stagno DAlcontres 31, I-98166 Messina, Italy 2.Chinese Acad Sci, Dalian Inst Chem Phys, 457 Zhongshan Rd, Dalian 116023, Peoples R China 3.Rhein Westfal TH Aachen, ITMC, Lehrstuhl Heterogene Katalyse & Tech Chem, Worringerweg 2, D-52074 Aachen, Germany 4.Univ Messina, Dept MIFT, ERIC Aisbl, Vle F Stagno DAlcontres 31, I-98166 Messina, Italy 5.INSTM CASPE, Vle F Stagno DAlcontres 31, I-98166 Messina, Italy
推荐引用方式 GB/T 7714	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.