Highly efficient electrochemical ammonia synthesis via nitrogen reduction reactions on a VN nanowire array under ambient conditions

2018 ◽  
Vol 54 (42) ◽  
pp. 5323-5325 ◽  
Author(s):  
Xiaoping Zhang ◽  
Rong-Mei Kong ◽  
Huitong Du ◽  
Lian Xia ◽  
Fengli Qu
Keyword(s):  
High Performance ◽  
Ammonia Synthesis ◽  
Nanowire Array ◽  
Reduction Reaction ◽  
Carbon Cloth ◽  
Ambient Conditions ◽  
Faradaic Efficiency ◽  
Nitrogen Reduction ◽  
Highly Efficient ◽  
High Ammonia

A VN nanowire array on carbon cloth (VN/CC) as a high-performance catalyst for the nitrogen reduction reaction (NRR) affords high ammonia yield (2.48 × 10−10 mol−1 s−1 cm−2) and faradaic efficiency (3.58%) at −0.3 V versus RHE in 0.1 M HCl.

Sb2S3 nanoparticles anchored on SnO2 nanofibers: a high-performance hybrid electrocatalyst toward ammonia synthesis under ambient conditions

2019 ◽  
Vol 55 (92) ◽  
pp. 13892-13895 ◽  
Author(s):  
Di Li Di Li ◽  
Xingxing Chen ◽  
Yi-Tao Liu ◽  
Jianyong Yu ◽  
Bin Ding
Keyword(s):  
High Performance ◽  
Ammonia Synthesis ◽  
Ambient Conditions ◽  
Faradaic Efficiency ◽  
High Ammonia

We report on a high-performance hybrid electrocatalyst, consisting of Sb2S3 nanoparticles anchored on SnO2 nanofibers, which exhibits high ammonia yield and faradaic efficiency.

Surface oxidized two-dimensional antimonene nanosheets for electrochemical ammonia synthesis under ambient conditions

2020 ◽  
Vol 8 (9) ◽  
pp. 4735-4739 ◽  
Author(s):  
Munkhjargal Bat-Erdene ◽  
Guangrui Xu ◽  
Munkhbayar Batmunkh ◽  
Abdulaziz S. R. Bati ◽  
Jessica J. White ◽  
...  
Keyword(s):  
Ammonia Synthesis ◽  
Surface Oxidation ◽  
Reduction Reaction ◽  
Two Dimensional ◽  
Ambient Conditions ◽  
Nitrogen Reduction

Few-layer antimonene nanosheets with surface oxidation have been used as an efficient nitrogen reduction reaction electrocatalyst for ammonia synthesis.

scholarly journals Boosting Electrochemical Nitrogen Reduction Performance over Binuclear Mo Atoms on N-Doped Nanoporous Graphene: A Theoretical Investigation

Molecules ◽  
2019 ◽  
Vol 24 (9) ◽  
pp. 1777 ◽  
Author(s):  
Ruijie Guo ◽  
Min Hu ◽  
Weiqing Zhang ◽  
Jia He
Keyword(s):  
Free Energy ◽  
Binding Free Energy ◽  
Product Yield ◽  
Reduction Reaction ◽  
Ambient Conditions ◽  
Present Contribution ◽  
Faradaic Efficiency ◽  
Nitrogen Reduction ◽  
Mo Catalyst ◽  
Nanoporous Graphene

Exploration of efficient catalysts is a priority for the electrochemical nitrogen reduction reaction (NRR) in order to receive a high product yield rate and faradaic efficiency of NH3, under ambient conditions. In the present contribution, the binding free energy of N2, NNH, and NH2 were used as descriptors to screen the potential NRR electrocatalyst among different single or binuclear transition metal atoms on N-doped nanoporous graphene. Results showed that the binuclear Mo catalyst might exhibit the highest catalytic activity. Further free energy profiles confirmed that binuclear Mo catalysts possess the lowest potential determining step (hydrogenation of NH2* to NH3). The improved activities could be ascribed to a down-shift of the density of states for Mo atoms. This investigation could contribute to the design of a highly active NRR electrocatalyst.

scholarly journals Mechanistic Insight into High Yield Electrochemical Nitrogen Reduction to Ammonia using Lithium Ions

2019 ◽  
Author(s):  
Anku Guha ◽  
Sreekanth Narayanru ◽  
Nisheal M. Kaley ◽  
D. Krishna Rao ◽  
Jagannath Mondal ◽  
...  
Keyword(s):  
Hydrogen Generation ◽  
Reduction Reaction ◽  
High Yield ◽  
Ambient Conditions ◽  
Faradaic Efficiency ◽  
Nitrogen Reduction ◽  
Mechanistic Insight ◽  
Working Electrode ◽  
Hydrogen Carrier ◽  
Scientific Attention

<p>Development of methods for economically feasible greener ammonia (NH<sub>3</sub>) production is gaining tremendous scientific attention. NH<sub>3</sub> has its importance in fertilizer industry and it is envisaged as a safer liquid hydrogen carrier for futuristic energy resources. Here, an aqueous electrolysis based NH<sub>3</sub> production in ambient conditions is reported, which yields high faradaic efficiency (~12%) NH<sub>3 </sub><i>via</i> nitrogen reduction reaction (NRR) at lower over potentials (~ -0.6V <i>vs.</i> RHE or -1.1V <i>vs.</i> Ag/AgCl). Polycrystalline copper (Cu) and gold (Au) are used as electrodes for electrochemical NRR, where the electrolyte which yields high amount of NH<sub>3 </sub>(~41 µmol/L) is 5M LiClO<sub>4</sub> in water with Cu as working electrode. A detailed study conducted here establishes the role of Li<sup>+</sup> in stabilizing nitrogen near to the working electrode - augmenting the NRR in comparison to its competitor - hydrogen evolution reaction, and a mechanistic insight in to the phenomenon is provided. <sup>15</sup>N<sub>2</sub> assisted labeling experiments are also conducted to confirm the formation of ammonia <i>via</i> NRR. This study opens up the possibilities of developing economically feasible electrodes for electrochemical NRR at lower energies with only transient modifications of electrodes during the electrolysis, unlike the studies reported on complex electrodes or electrolytes designed for NRR in aqueous medium to suppress the hydrogen generation. </p>

Fe nanodot-decorated MoS2 nanosheets on carbon cloth: an efficient and flexible electrode for ambient ammonia synthesis

2019 ◽  
Vol 7 (48) ◽  
pp. 27417-27422 ◽  
Author(s):  
Xinhui Zhao ◽  
Xu Zhang ◽  
Zhimin Xue ◽  
Wenjun Chen ◽  
Zhen Zhou ◽  
...  
Keyword(s):  
Ambient Temperature ◽  
Ammonia Synthesis ◽  
Reduction Reaction ◽  
Carbon Cloth ◽  
Mos2 Nanosheets ◽  
Flexible Electrode ◽  
Nitrogen Reduction

Fe nanodot-decorated MoS2 nanosheets on carbon cloth (Fe–MoS2/CC) was rationally designed as an efficient and flexible electrode for the electrochemical nitrogen reduction reaction at ambient temperature.

Mechanistic Insight into High Yield Electrochemical Nitrogen Reduction to Ammonia using Lithium Ions

2019 ◽  
Author(s):  
Anku Guha ◽  
Sreekanth Narayanru ◽  
Nisheal M. Kaley ◽  
D. Krishna Rao ◽  
Jagannath Mondal ◽  
...  
Keyword(s):  
Hydrogen Generation ◽  
Reduction Reaction ◽  
High Yield ◽  
Ambient Conditions ◽  
Faradaic Efficiency ◽  
Nitrogen Reduction ◽  
Mechanistic Insight ◽  
Working Electrode ◽  
Hydrogen Carrier ◽  
Scientific Attention

<p>Development of methods for economically feasible greener ammonia (NH<sub>3</sub>) production is gaining tremendous scientific attention. NH<sub>3</sub> has its importance in fertilizer industry and it is envisaged as a safer liquid hydrogen carrier for futuristic energy resources. Here, an aqueous electrolysis based NH<sub>3</sub> production in ambient conditions is reported, which yields high faradaic efficiency (~12%) NH<sub>3 </sub><i>via</i> nitrogen reduction reaction (NRR) at lower over potentials (~ -0.6V <i>vs.</i> RHE or -1.1V <i>vs.</i> Ag/AgCl). Polycrystalline copper (Cu) and gold (Au) are used as electrodes for electrochemical NRR, where the electrolyte which yields high amount of NH<sub>3 </sub>(~41 µmol/L) is 5M LiClO<sub>4</sub> in water with Cu as working electrode. A detailed study conducted here establishes the role of Li<sup>+</sup> in stabilizing nitrogen near to the working electrode - augmenting the NRR in comparison to its competitor - hydrogen evolution reaction, and a mechanistic insight in to the phenomenon is provided. <sup>15</sup>N<sub>2</sub> assisted labeling experiments are also conducted to confirm the formation of ammonia <i>via</i> NRR. This study opens up the possibilities of developing economically feasible electrodes for electrochemical NRR at lower energies with only transient modifications of electrodes during the electrolysis, unlike the studies reported on complex electrodes or electrolytes designed for NRR in aqueous medium to suppress the hydrogen generation. </p>

Excavated cubic platinum–iridium alloy nanocrystals with high-index facets as highly efficient electrocatalysts in N2 fixation to NH3

2019 ◽  
Vol 55 (63) ◽  
pp. 9335-9338 ◽  
Author(s):  
Yu-Jie Mao ◽  
Lu Wei ◽  
Xin-Sheng Zhao ◽  
Yong-Sheng Wei ◽  
Jian-Wei Li ◽  
...  
Keyword(s):  
N2 Fixation ◽  
Reduction Reaction ◽  
High Index ◽  
Faradaic Efficiency ◽  
Nitrogen Reduction ◽  
Electrocatalytic Properties ◽  
Alloy Nanocrystals ◽  
Highly Efficient

Excavated cubic Pt93Ir7 alloy nanocrystals enclosed by high-index {710} facets exhibit excellent electrocatalytic properties for the nitrogen reduction reaction (NRR) with high faradaic efficiency (40.8%) and NH3 yield (28 μg h−1 cm−2).

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