Catalysis Science & Technology, Journal Year: 2024, Volume and Issue: 14(11), P. 3007 - 3011
Published: Jan. 1, 2024
As an efficient catalyst for NH 3 production via NO 2 − reduction, Co nanoparticles decorated radix cynanchi paniculati-derived carbon exhibits a high faradaic efficiency of 92.77% with yield 1235.62 μmol h −1 cm −2 at −0.8 V.
Language: Английский
ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(7), P. 2783 - 2789
Published: Feb. 2, 2024
Electrochemical nitrite-to-ammonia reduction (NO2RR) holds great promise for converting harmful NO2– into valuable NH3. Herein, we develop Co single atoms dispersed on a C3N4 substrate (Co1/C3N4) as an efficient catalyst toward the NO2RR. Experimental and theoretical investigations reveal that single-atom sites can effectively active optimize formation energy of key *NOH intermediate to promote → NH3 energetics. Remarkably, Co1/C3N4 equipped in flow cell delivers exceptional NH3–Faradaic efficiency 97.9% yield rate 1080.3 μmol h–1cm–2 at industrial-level current density 355 mA cm–2, along with long-term durability 100 h electrolysis, showing considerable potential practical electrosynthesis.
Language: Английский
Citations
31
Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 663, P. 405 - 412
Published: Feb. 23, 2024
Language: Английский
Citations
25
Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 348, P. 123810 - 123810
Published: April 24, 2024
Language: Английский
Citations
22
ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(28), P. 10313 - 10324
Published: June 28, 2024
The electrocatalytic nitrite reduction reaction (NO2–RR) occurs under mild conditions at ambient temperature and pressure can convert pollution into recycled ammonia. This method has great application potential in the purification of water environment field synthetic In this article, we present a to synthesize relatively uniformly dispersed gold nanoparticles on surface carbon cloth fibers (Au@CC) by hydrothermal self-assembly growth calcination without use adhesive process. We studied influence different surfactants distribution particle size mechanism study explored their effects NO2–RR performance. results showed that Au@CC with small (≈86.2 nm) could be obtained when sample was synthesized surfactant sodium dodecyl sulfate (SDS). is mainly due strong coordination between SDS precursor hydrophobic group interact cloth. When performed 0.1 M phosphate buffered saline (PBS) (with NaNO2) solution, Au@CC-SDS electrode gave high NH3 yield 1249.1 μg h–1 cm–2 faradaic efficiency 80.7%. density functional theory (DFT) calculations clarified Au active site. Thus, demonstrated beneficial formation supported fiber proved gold-based nanomaterials are promising catalyst for ammonia synthesis.
Language: Английский
Citations
22
Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 350, P. 123919 - 123919
Published: April 24, 2024
Language: Английский
Citations
18
Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: 147(9), P. 8012 - 8023
Published: Feb. 18, 2025
The electrocatalytic nitrite reduction (NO2RR) converts nitrogen-containing pollutants to high-value ammonia (NH3) under ambient conditions. However, its multiple intermediates and multielectron coupled proton transfer process lead low activity NH3 selectivity for the existing electrocatalysts. Herein, we synthesize a solid-solution copper-zinc cyanamide (Cu0.8Zn0.2NCN) with localized structure distortion tailored surface electrostatic potential, allowing asymmetric binding of NO2-. It exhibits outstanding NO2RR performance Faradaic efficiency ∼100% an yield 22 mg h-1 cm-2, among best such process. Theoretical calculations in situ spectroscopic measurements demonstrate that Cu-Zn sites coordinated linear polarized [NCN]2- could transform symmetric [Cu-O-N-O-Cu] CuNCN-NO2- [Cu-N-O-Zn] configuration Cu0.8Zn0.2NCN-NO2-, thus enhancing adsorption bond cleavage. A paired electro-refinery Cu0.8Zn0.2NCN cathode reaches 2000 mA cm-2 at 2.36 V remains fully operational industrial-level 400 >140 h production rate ∼30 mgNH3 cm-2. Our work opens new avenue tailoring potentials using strategy advanced electrocatalysis.
Language: Английский
Citations
3
Environmental Science & Technology, Journal Year: 2022, Volume and Issue: 56(23), P. 17298 - 17309
Published: Nov. 17, 2022
The presence of excessive concentrations nitrate in industrial wastewaters, agricultural runoff, and some groundwaters constitutes a serious issue for both environmental human health. As result, there is considerable interest the possibility converting to valuable product ammonia by electrochemical means. In this work, we demonstrate efficacy novel flow cathode system coupled with stripping effective removal generation recovery. A copper-loaded activated carbon slurry (Cu@AC), made simple, low-cost wet impregnation method, used as reactor. Use 3 wt % Cu@AC suspension at an applied current density 20 mA cm-2 resulted almost complete removal, 97% reduced 70% recovered acid-receiving chamber. mathematical kinetic model was developed that satisfactorily describes kinetics mechanism overall electroreduction process. Minimal loss Cu solution maintenance performance over extended use electrode augers well long-term technology. Overall, study sheds light on efficient, water treatment technology simultaneous
Language: Английский
Citations
49
Materials, Journal Year: 2023, Volume and Issue: 16(11), P. 4000 - 4000
Published: May 26, 2023
Ammonia (NH3) is a highly important industrial chemical used as fuel and fertilizer. The synthesis of NH3 relies heavily on the Haber–Bosch route, which accounts for roughly 1.2% global annual CO2 emissions. As an alternative electrosynthesis from nitrate anion (NO3−) reduction (NO3−RR) has drawn increasing attention, since NO3−RR wastewater to produce can not only recycle waste into treasure but also alleviate adverse effects excessive NO3− contamination in environment. This review presents contemporary views state art electrocatalytic over Cu-based nanostructured materials, discusses merits performance, summarizes current advances exploration this technology using different strategies nanostructured-material modification. mechanism reviewed here, especially with regard copper-based catalysts.
Language: Английский
Citations
25
Carbon Neutrality, Journal Year: 2023, Volume and Issue: 2(1)
Published: Aug. 1, 2023
Abstract Ammonia serves as an irreplaceable raw material for nitrogen fertilizers, which is essential global food production. In addition, it has been recently endowed with a new function carrier of renewable energy, demonstrating significant research prospects. However, the highly developed ammonia industry results in abundant nitrogenous wastes nature, thus causing severe pollution and disrupting cycle. The environmentally friendly electrocatalytic technologies upcycling to green represent valuable transformation strategy. this review, we present three effective pathways reduction ammonia, including nitrate reaction (NO 3 RR), nitrite 2 nitric oxide (NORR). Furthermore, achievements challenges associated electrocatalysts synthesis are discussed terms noble metal-based electrocatalysts, non-noble metal-free electrocatalysts. Moreover, review provides systematic perspective on mechanisms, catalyst design, future developments, offering insights prospects value-upgrading cycle substances. By exploring potential synthesis, aim contribute development sustainable
Language: Английский
Citations
23
ACS Nano, Journal Year: 2024, Volume and Issue: 18(36), P. 25316 - 25324
Published: Aug. 26, 2024
Urea electrosynthesis from coelectrolysis of NO
Language: Английский
Citations
16