A5010796078- Ammonia Synthesis and Nitrogen Reduction
- Hydrogen Storage and Materials
- Chemical Synthesis and Characterization
- Caching and Content Delivery
- Advanced Photocatalysis Techniques
- Electrocatalysts for Energy Conversion
- Catalytic Processes in Materials Science
- Environmental DNA in Biodiversity Studies
- Muon and positron interactions and applications
- Carbon Dioxide Capture Technologies
- Advanced Battery Materials and Technologies
- CO2 Reduction Techniques and Catalysts
- Advancements in Battery Materials
- Machine Learning in Materials Science
- Fuel Cells and Related Materials
- Chemical Reactions and Isotopes
- Advanced battery technologies research
Technical University of Denmark
2023-2025
Ammonia is a critical component in fertilizers, pharmaceuticals, and fine chemicals an ideal, carbon-free fuel. Recently, lithium-mediated nitrogen reduction has proven to be promising route for electrochemical ammonia synthesis at ambient conditions. In this work, we report continuous-flow electrolyzer equipped with 25-square centimeter-effective area gas diffusion electrodes wherein coupled hydrogen oxidation. We show that the classical catalyst platinum not stable oxidation organic...
Abstract Ammonia is a crucial component in the production of fertilizers and various nitrogen-based compounds. Now, lithium-mediated nitrogen reduction reaction (Li-NRR) has emerged as promising approach for ammonia synthesis at ambient conditions. The proton shuttle plays critical role transfer process during Li-NRR. However, structure-activity relationship design principles effective shuttles have not yet been established practical Li-NRR systems. Here, we propose general procedure...
Ammonia electrosynthesis through the lithium-mediated approach has recently reached promising results towards high activity and selectivity in aprotic media, reaching Faradaic efficiency (FE) values NH3 production rates. To fasten comprehension optimization of complex nitrogen reduction system, for first time a multivariate is proposed as powerful tool to reduce number experiments comparison with classical one-factor-at-a-time approach. Doehlert design surface response methodology are...
Ammonia electrosynthesis through the lithium‐mediated approach has recently reached promising results towards high activity and selectivity in aprotic media, reaching Faradaic efficiency (FE) values NH3 production rates. To fasten comprehension optimization of complex nitrogen reduction system, for first time a multivariate is proposed as powerful tool to reduce number experiments comparison with classical one‐factor‐at‐a‐time approach. Doehlert design surface response methodology are...
Operando GI-WAXS showed that the SEI layer formed by LiBF 4 enhances Li-NRR performance limiting proton transport to electrode. Intermediate LiN x H y species give insight into mechanism of Li-NRR.
Recently, the lithium-mediated nitrogen reduction reaction (Li-NRR) has emerged as a promising approach for electrochemical ammonia synthesis, facilitating more localized production. However, systematic investigation of lithium salts in this process, especially when coupled with hydrogen oxidation (HOR) at anode side continuous-flow reactor, remains largely underexplored. This study systematically investigates effects various on Li-NRR selectivity and efficiency reactor HOR anode. Among...
The lithium-mediated nitrogen reduction reaction (Li-NRR) is a promising method for decentralized ammonia synthesis using renewable energy. An organic electrolyte utilized to combat the competing hydrogen evolution reaction, and lithium plated activate inert N2 molecule. Ethanol commonly used as proton shuttle provide activated nitrogen. In this study, we investigate role of ethanol in an containing tetrahydrofuran 0.2 M perchlorate. Particularly designed electrochemical experiments show...
Electrified interfaces are critical to the performance of energy systems and often demonstrate substantial complexity under operating conditions. A nanoscale understanding interfacial microenvironment, i.e., solid-electrolyte interphase (SEI), in lithium-mediated nitrogen reduction (Li-N2R) is key for realizing efficient ammonia (NH3) production. Herein, we used time-resolved neutron reflectometry (NR) observe SEI formation Li-N2R We found that LiBF4-based electrolyte provided a...
Electrified interfaces are critical to the performance of energy systems and often demonstrate substantial complexity under operating conditions. Nanoscale understanding interfacial microenvironment, i.e., solid electrolyte interphase (SEI), in lithium-mediated nitrogen reduction (Li-N2R) is key for realizing efficient ammonia production. Using situ neutron reflectometry, we found Li-N2R SEI comprises a thick, diffuse outer layer thin, compact inner at low current cycling. Increasing density...
The lithium-mediated nitrogen reduction reaction (Li-NRR) represents a promising approach for electrochemical activation, in which the solid electrolyte interphase (SEI) layer formed on electrochemically plated lithium plays key role. Herein, we used time-resolved, operando, grazing incidence wide-angle X-ray scattering (GI WAXS) to identify SEI species and intermediates Li-NRR, comparing LiBF4 LiClO4 as salts. We demonstrated how composition influences Li-NRR performance by regulating...
Electrified interfaces are critical to the performance of energy systems and often demonstrate substantial complexity under operating conditions. Nanoscale understanding interfacial microenvironment, i.e., solid electrolyte interphase (SEI), in lithium-mediated nitrogen reduction (Li-N2R) is key for realizing efficient ammonia (NH3) production. Herein, we have used time-resolved neutron reflectometry (NR) observe SEI formation Li-N2R We found that LiBF4-based provided a substantially more...
Abstract Ammonia is a crucial component in the production of fertilizers and various nitrogen-based compounds. Now, lithium-mediated nitrogen reduction reaction (Li-NRR) has emerged as promising approach for ammonia synthesis at ambient conditions. The proton shuttle plays critical role transfer process during Li-NRR. However, structure-activity relationship design principles effective shuttles have not yet been established practical Li-NRR systems. Here, we propose general procedure...
Ammonia, a fundamental building-block for fertilizers and other many commodities, is responsible, through the Haber-Bosh (HB) process, of around 1.4% global greenhouse gas emissions. Indeed, HB operates in severe conditions (200 atm), fossil fuel dependent, since few huge, centralized plants are combined with steam reforming H 2 production. To find renewable-driven delocalized electrochemical process NH 3 production, complementary to HB, could be key solution our society that facing climate...
CO 2 electrolysis (CO2E) coupled with renewable energy is an important strategy to mitigate the effects of green house gas in atmosphere. By effectively transforming into higher value chemicals and fuels, carbon cycle can be closed. [1] In order produce C2+ products, most studies have been done aqueous electrolytes, using Cu based catalysts. Nevertheless, these systems show different critical problems. First, low temperature CO2E, carbonation water primary source losses. [2] Moreover, rely...
Ammonia is used extensively as a fertilizer in agriculture and the chemical industry. It also has potential to store carbon-neutral fuel (hydrogen) future. To help meet future demand for ammonia, electrochemical nitrogen reduction reaction (NRR) received much attention. would serve decentralized method of synthesizing ammonia at low temperature pressure. [1] this day, most promising NRR results have been shown via lithium-mediated approach, which lithium metal electroplated an organic...
Abstract Ammonia is essential to the fertilizer and chemical industries seen as a carbon-free fuel 1 . The ammonia electrosynthesis from nitrogen under ambient conditions an attractive alternative centralized Haber-Bosch process 2,3 lithium-mediated reduction (Li-NRR) has been demonstrated promising approach for continuous-flow electrosynthesis, where coupled with hydrogen oxidation 4 This provides genuine pathway converting into ammonia, but long-term production impeded by polymerization...
Due to its important role in the production of fertilizers ammonia is one most produced chemicals worldwide. In recent years there has been increasing interest electrochemical lithium mediated nitrogen reduction reaction (LMNRR), as a possible alternative Haber-Bosch process. The LMNRR advantageous it can be carried out under ambient temperatures and pressures [1]. process involves plating metallic Li from an organic electrolyte. This plated reacts with elemental forming intermediate nitride...
The industrial synthesis of ammonia (NH 3 ) via the Haber-Bosch process has enabled mass production fertilizer and human population growth to 8 billion. 1 NH also shows promise as a long-term, energy-dense fuel amenable widespread distribution. 2 However, operates at high temperatures pressures in centralized facilities accounts for 1.3% global carbon emissions. 1,2 To ensure food-secure future realize truly carbon-free fuel, we must develop an alternative that ambient conditions can be...