Offshore green ammonia synthesis

Salmon, Nicholas; Bañares‐Alcántara, René

doi:10.1038/s44160-023-00309-3

“…To achieve industrial production of urea synthesis through electrocatalysis, high stability of the catalyst is required [28] . Therefore, we explored the reproducibility and durability of CuSiO x toward urea electrosynthesis.…”

Section: Resultsmentioning

confidence: 99%

“…To achieve industrial production of urea synthesis through electrocatalysis, high stability of the catalyst is required. [28] Therefore, we explored the reproducibility and durability of CuSiO x toward urea electrosynthesis. The CuSiO x electrode maintained a relatively stable potentiostatic operation current density of approximately 1.2 mA cm À 2 for 80 h at À 0.2 V vs. RHE with a urea FE of 60 % (Figure 2g).…”

Section: Methodsmentioning

confidence: 99%

Overcoming Electrostatic Interaction via Pulsed Electroreduction for Boosting the Electrocatalytic Urea Synthesis

Qiu,

Qin,

Li

et al. 2024

Angew Chem Int Ed

19

0

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Electrocatalytic urea synthesis under ambient conditions offers a promising alternative strategy to the traditional energy‐intensive urea industry protocol. Limited by the electrostatic interaction, the reduction reaction of anions at the cathode in the electrocatalytic system is not easily achievable. Here, we propose a novel strategy to overcome electrostatic interaction via pulsed electroreduction. We found that the reconstruction‐resistant CuSiOx nanotube, with abundant atomic Cu‐O‐Si interfacial sites, exhibits ultrastability in the electrosynthesis of urea from nitrate and CO2. Under a pulsed potential approach with optimal operating conditions, the Cu‐O‐Si interfaces achieve a superior urea production rate (1606.1 μg h‐1 mgcat.‐1) with high selectivity (79.01%) and stability (the Faradaic efficiency is retained at 80% even after 80 h of testing), outperforming most reported electrocatalytic synthesis urea catalysts. We believe our strategy will incite further investigation into pulsed electroreduction increasing substrate transport, which may guide the design of ambient urea electrosynthesis and other energy conversion systems.

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“…Ammonia holds great promise as a renewable energy carrier owing to its exceptionally high energy density and ease of storage and transportation. [ 1–3 ] However, our society's continued reliance on industrial nitrogen fixation, specifically the energy‐intensive Haber–Bosch process, casts a shadow on this promise. This well‐established method demands soaring temperatures (300–500 °C) and high pressure (150–300 atm) to churn out ammonia.…”

Section: Introductionmentioning

confidence: 99%

Photoexcitation Altered Reaction Pathway Greatly Facilitate Ammonia Synthesis Over Isolated Ru Sites

Feng,

Raziq,

Hu

et al. 2024

Advanced Energy Materials

2

0

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Ammonia, poised as a carbon‐neutral energy carrier, holds immense promise in reshaping the future energy landscape. Despite the enduring importance of the Haber–Bosch process in ammonia production, its substantial carbon emissions and energy demands necessitate more sustainable pathways. Here, an advanced ammonia synthesis route, enhanced by photoexcitation is demonstrated, which fundamentally modifies the activation pathways of N2 molecules. This alteration significantly lowers the reaction activation energy, resulting in remarkably improved reaction efficiency. The impact of light excitation culminates in an unprecedented ammonia synthesis rate of 18 mmol g−1 h−1, surpassing the traditional thermal catalytic process by 2.57‐fold. More importantly, light assistance reduces the thermal energy input by ≈16%, making it comparable to thermal catalysis while substantially improving energy utilization. This work introduces a greener strategy for ammonia synthesis, pushing the century‐old fossil‐fueled Haber–Bosch process to a new frontier.

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Overcoming Electrostatic Interaction via Pulsed Electroreduction for Boosting the Electrocatalytic Urea Synthesis

Qiu,

Qin,

Li

et al. 2024

Angewandte Chemie

0

View full text Add to dashboard Cite

Electrocatalytic urea synthesis under ambient conditions offers a promising alternative strategy to the traditional energy‐intensive urea industry protocol. Limited by the electrostatic interaction, the reduction reaction of anions at the cathode in the electrocatalytic system is not easily achievable. Here, we propose a novel strategy to overcome electrostatic interaction via pulsed electroreduction. We found that the reconstruction‐resistant CuSiOx nanotube, with abundant atomic Cu‐O‐Si interfacial sites, exhibits ultrastability in the electrosynthesis of urea from nitrate and CO2. Under a pulsed potential approach with optimal operating conditions, the Cu‐O‐Si interfaces achieve a superior urea production rate (1606.1 μg h‐1 mgcat.‐1) with high selectivity (79.01%) and stability (the Faradaic efficiency is retained at 80% even after 80 h of testing), outperforming most reported electrocatalytic synthesis urea catalysts. We believe our strategy will incite further investigation into pulsed electroreduction increasing substrate transport, which may guide the design of ambient urea electrosynthesis and other energy conversion systems.

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Offshore green ammonia synthesis

Cited by 10 publications

References 41 publications

Overcoming Electrostatic Interaction via Pulsed Electroreduction for Boosting the Electrocatalytic Urea Synthesis

Overcoming Electrostatic Interaction via Pulsed Electroreduction for Boosting the Electrocatalytic Urea Synthesis

Photoexcitation Altered Reaction Pathway Greatly Facilitate Ammonia Synthesis Over Isolated Ru Sites

Overcoming Electrostatic Interaction via Pulsed Electroreduction for Boosting the Electrocatalytic Urea Synthesis

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