An amorphous WC thin film enabled high-efficiency N2 reduction electrocatalysis at ambient conditions

2021 ◽  
Author(s):  
Shaoxiong Li ◽  
Yonglan Luo ◽  
Luchao Yue ◽  
Ting Shuai Li ◽  
Yan Wang ◽  
...  
Keyword(s):  
Thin Film ◽  
High Efficiency ◽  
Aqueous Media ◽  
Reduction Reaction ◽  
Ambient Conditions ◽  
Promising Alternative ◽  
Bosch Process

Ambient electrochemical N2 reduction offers a promising alternative for the energy-intensive Haber-Bosch process toward renewable NH3 synthesis in aqueous media but needs efficient electrocatalysts to enable the N2 reduction reaction...

scholarly journals Communication—Partial Oxidation of MnS for Synergistic Electrocatalysis of N2-to-NH3 Fixation at Ambient Conditions

2021 ◽  
Author(s):  
Peiei Li ◽  
Dan Cheng ◽  
Xiaohua Zhu ◽  
Meiling Liu ◽  
Youyu Zhang
Keyword(s):  
Partial Oxidation ◽  
Reduction Reaction ◽  
Ambient Conditions ◽  
Faradaic Efficiency ◽  
Bosch Process ◽  
Ambient Nh3 ◽  
Reaction Performance ◽  
Excellent Selectivity

Abstract Compared with the traditional Haber-Bosch process, electrochemical N2-to-NH3 reduction affords an eco-friendly and sustainable alternative to ambient NH3 synthesis with the aid of efficient electrocatalysts. In this work, partial oxidation of MnS to obtain the MnS-Mn3O4 is proved as a promising noble-free electrocatalysts of N2to NH3 fixation at ambient conditions. When tested in 0.1 M Na2SO4, the electrochemical N2 reduction reaction performance of MnS-Mn3O4 is improved comparing with the MnS, which achieves large NH3 yield of 16.74 μg h–1 mgcat.–1 and a high Faradaic efficiency of 5.72%. It also exhibits excellent selectivity of N2-to-NH3 and strong long-term electrochemical stabil

Boosting Electrochemical Nitrogen Reduction to Ammonia with High Efficiency using LiNb3O8 Electrocatalyst in Neutral Media

2022 ◽  
Author(s):  
Qi Wang ◽  
Shuhui Fan ◽  
Leran Liu ◽  
Xiaojiang Wen ◽  
Yun Wu ◽  
...  
Keyword(s):  
High Efficiency ◽  
Ammonia Synthesis ◽  
Reduction Reaction ◽  
Nitrogen Reduction ◽  
Bosch Process ◽  
Neutral Media

Nitrogen reduction reaction (NRR) has great research prospects as a method to replace the industrial Haber-Bosch process for ammonia synthesis. Nevertheless, the efficiency of NRR is mainly depended on the...

scholarly journals Transition Metal Oxynitrides Catalysts for Electrochemical Reduction of Nitrogen to Ammonia

2021 ◽  
Author(s):  
Damilola Ologunagba ◽  
Shyam Kattel
Keyword(s):  
Density Functional Theory ◽  
Transition Metal ◽  
Dft Calculations ◽  
Electrochemical Reduction ◽  
Density Functional ◽  
Reduction Reaction ◽  
Ambient Conditions ◽  
Functional Theory ◽  
Nitrogen Reduction ◽  
Bosch Process

Electrochemical nitrogen reduction reaction (ENRR) at ambient conditions is beneficial compared to energy intensive thermochemical Haber-Bosch process for NH3 production. Here, periodic density functional theory (DFT) calculations are carried out...

scholarly journals Assessment of Direct Injected Liquefied Petroleum Gas-Diesel Blends for Ultra-Low Soot Combustion Engine Application

2020 ◽  
Vol 10 (14) ◽  
pp. 4949
Author(s):  
Roberto Ianniello ◽  
Gabriele Di Blasio ◽  
Renato Marialto ◽  
Carlo Beatrice ◽  
Massimo Cardone
Keyword(s):  
Internal Combustion Engines ◽  
Fossil Fuels ◽  
High Efficiency ◽  
Combustion Engine ◽  
Combustion Process ◽  
Experimental Tests ◽  
Liquefied Petroleum Gas ◽  
Ambient Conditions ◽  
Promising Alternative ◽  
Compression Ignition Engines

Technological and economic concerns correlated to fulfilling future emissions and CO2 standards require great research efforts to define an alternative solution for low emissions and highly efficient propulsion systems. Alternative fuel formulation could contribute to this aim. Liquefied petroleum gas (LPG) with lower carbon content than other fossil fuels and which is easily vaporized at ambient conditions has the advantage of lowering CO2 emissions and optimizing the combustion process. Liquefied petroleum gas characteristics and availability makes the fuel a promising alternative for internal combustion engines. The possible combination of using it in high-efficiency compression ignition engines makes it worth analyzing the innovative method of using LPG as a blend component in diesel. Few relevant studies are detectable in literature in this regard. In this study, two blends containing diesel and LPG, in volume ratios 20/80 and 35/65, respectively, were formulated and utilized. Their effects on combustion and emissions performance were assessed by performing proper experimental tests on a modern light-duty single-cylinder engine test rig. Reference operating points at conventional engine calibration settings were examined. A specific exhaust gas recirculation (EGR) parametrization was performed evaluating the LPG blends’ potential in reducing the smoke emissions at standard engine-out NOx levels. The results confirm excellent NOx-smoke trade-off improvements with smoke reductions up to 95% at similar NOx and efficiency. Unburnt emissions slightly increase, and to acceptable levels. Improvements, in terms of indicated specific fuel consumption (ISFC), are detected in the range of 1–3%, as well as the CO2 decrease proportionally to the mixing ratio.

Graphene supported non-precious metal-macrocycle catalysts for oxygen reduction reaction in fuel cells

Nanoscale ◽  
2015 ◽  
Vol 7 (16) ◽  
pp. 6991-6998 ◽  
Author(s):  
Hyun-Jung Choi ◽  
Nanjundan Ashok Kumar ◽  
Jong-Beom Baek
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Precious Metal ◽  
Alternative Energy ◽  
High Efficiency ◽  
Reduction Reaction ◽  
Promising Alternative ◽  
Energy Devices

Fuel cells are promising alternative energy devices owing to their high efficiency and eco-friendliness.

scholarly journals A Tuned Lewis Acidic Catalyst Guided by Hard-soft Acid-base Theory to Promote N2 Electroreduction

2021 ◽  
Author(s):  
Yongwen Ren ◽  
Chang Yu ◽  
Xuedan Song ◽  
Fengyi Zhou ◽  
Xinyi Tan ◽  
...  
Keyword(s):  
Reduction Reaction ◽  
Ambient Conditions ◽  
Renewable Electricity ◽  
Acid Base ◽  
Acidic Catalyst ◽  
Bosch Process ◽  
Base Theory ◽  
Soft Acid

Electrocatalytic N2 reduction reaction (NRR) to ammonia (NH3) driven by intermittent renewable electricity under ambient conditions offers an alternative to the energy-intensive Haber−Bosch process. However, as a distinct core of...

High-efficiency electrochemical conversion of nitric oxide into ammonia on Ni2P nanoarray at ambient conditions

2021 ◽  
Author(s):  
Ting Mou ◽  
Jie Liang ◽  
Ziyu Ma ◽  
Longcheng Zhang ◽  
Yiting Lin ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Nitrogen Cycle ◽  
High Efficiency ◽  
Ambient Conditions ◽  
Electrochemical Conversion ◽  
Bosch Process

Electroreduction of NO to NH3 at ambient conditions mitigates the human-caused unbalance of globe nitrogen cycle and represents a sustainable and on-site alternative to the industrial Haber–Bosch process, while its...

Biomass Juncus derived carbon decorated with cobalt nanoparticles for high-efficiency ammonia electrosynthesis by nitrite reduction

2022 ◽  
Author(s):  
Jiaqian Wang ◽  
Jie Liang ◽  
Peng-Yu Liu ◽  
Zhe Yan ◽  
Linxia Cui ◽  
...  
Keyword(s):  
High Efficiency ◽  
Reduction Reaction ◽  
Cobalt Nanoparticles ◽  
Nitrite Reduction ◽  
Attractive Alternative ◽  
Bosch Process ◽  
Promising Strategy ◽  
No2 Reduction

Electrochemical nitrite (NO2–) reduction reaction (NO2RR) is not only a promising strategy to degrade harmful NO2– contaminant in the environment but an attractive alternative to the Haber-Bosch process for sustainable...

High-efficiency electrochemical nitrite reduction to NH3 by Cu3P nanowire array under ambient conditions

2021 ◽  
Author(s):  
Jie Liang ◽  
Biao Deng ◽  
Qin Liu ◽  
Guilai Wen ◽  
Qian Liu ◽  
...  
Keyword(s):  
Significant Role ◽  
Large Scale ◽  
High Efficiency ◽  
Nanowire Array ◽  
Nitrite Reduction ◽  
Ambient Conditions ◽  
Nitrogen Reduction ◽  
Bosch Process

Ammonia (NH3) plays a significant role in agriculture and industry. Industrially, large-scale NH3 production mainly depends on the energy-intensive and environmentally unfriendly Haber-Bosch process. Electrochemical nitrogen reduction is regarded as...

scholarly journals Carbon nitride-based light-driven microswimmers with intrinsic photocharging ability

2020 ◽  
Vol 117 (40) ◽  
pp. 24748-24756
Author(s):  
Varun Sridhar ◽  
Filip Podjaski ◽  
Julia Kröger ◽  
Alberto Jiménez-Solano ◽  
Byung-Wook Park ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Solar Energy ◽  
Environmental Remediation ◽  
Carbon Nitride ◽  
Uv Light ◽  
Aqueous Media ◽  
Reduction Reaction ◽  
Ambient Conditions ◽  
Earth Abundant ◽  
Major Surface

Controlling autonomous propulsion of microswimmers is essential for targeted drug delivery and applications of micro/nanomachines in environmental remediation and beyond. Herein, we report two-dimensional (2D) carbon nitride-based Janus particles as highly efficient, light-driven microswimmers in aqueous media. Due to the superior photocatalytic properties of poly(heptazine imide) (PHI), the microswimmers are activated by both visible and ultraviolet (UV) light in conjunction with different capping materials (Au, Pt, and SiO2) and fuels (H2O2 and alcohols). Assisted by photoelectrochemical analysis of the PHI surface photoreactions, we elucidate the dominantly diffusiophoretic propulsion mechanism and establish the oxygen reduction reaction (ORR) as the major surface reaction in ambient conditions on metal-capped PHI and even with TiO2-based systems, rather than the hydrogen evolution reaction (HER), which is generally invoked as the source of propulsion under ambient conditions with alcohols as fuels. Making use of the intrinsic solar energy storage ability of PHI, we establish the concept of photocapacitive Janus microswimmers that can be charged by solar energy, thus enabling persistent light-induced propulsion even in the absence of illumination—a process we call “solar battery swimming”—lasting half an hour and possibly beyond. We anticipate that this propulsion scheme significantly extends the capabilities in targeted cargo/drug delivery, environmental remediation, and other potential applications of micro/nanomachines, where the use of versatile earth-abundant materials is a key prerequisite.

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