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题名: Room-Temperature Electrocatalytic Synthesis of NH3 from H2O and N-2 in a Gas-Liquid-Solid Three-Phase Reactor
作者: 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
发表日期: 2017-08-01
DOI: 10.1021/acssuschemeng.7b01742
卷: 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
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.
关键词[WOS]: ELECTROCHEMICAL SYNTHESIS ;  ATMOSPHERIC-PRESSURE ;  AMMONIA
语种: 英语
WOS记录号: WOS:000407410900114
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/149984
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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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

Recommended Citation:
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.
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