Unveiling Cutting‐Edge Developments in Electrocatalytic Nitrate‐to‐Ammonia Conversion

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(16)

Published: Jan. 11, 2024

The excessive enrichment of nitrate in the environment can be converted into ammonia (NH

Language: Английский

---

Electrochemical nitrate reduction in acid enables high-efficiency ammonia synthesis and high-voltage pollutes-based fuel cells

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Dec. 5, 2023

Abstract Most current research is devoted to electrochemical nitrate reduction reaction for ammonia synthesis under alkaline/neutral media while the investigation of acidic conditions rarely reported. In this work, we demonstrate potential TiO 2 nanosheet with intrinsically poor hydrogen-evolution activity selective and rapid conditions. Hybridized iron phthalocyanine, resulting catalyst displays remarkably improved efficiency toward formation owing enhanced adsorption, suppressed hydrogen evolution lowered energy barrier rate-determining step. Then, an alkaline-acid hybrid Zn-nitrate battery was developed high open-circuit voltage 1.99 V power density 91.4 mW cm –2 . Further, environmental sulfur recovery can be powered by above hydrazine-nitrate fuel cell simultaneously hydrazine/nitrate conversion electricity generation. This work demonstrates attractive electrosynthesis broadens field conversion.

Language: Английский

---

Relay Catalysis of Fe and Co with Multi‐Active Sites for Specialized Division of Labor in Electrocatalytic Nitrate Reduction Reaction

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: April 8, 2024

Abstract Electrocatalytic nitrate reduction reaction (NO 3 RR) driven by renewable energy is a promising technology for the removal of nitrate‐containing wastewater. However, sluggish kinetics resulted from complex proton‐coupled electron transfer and various intermediates remain key barriers large‐scale application NO RR. Herein, tactic reported to raise rate RR increase selectivity N 2 using bimetal catalyst: Co inclined act on steps needed in process, rate‐determining step (RDS: *NO , asterisk means intermediates) subsequent *N hydrogenation as well Fe exhibits efficient activity selectivity‐ determining (SDS: then ) via relay catalysis mechanism. A efficiency 78.5% an ultra‐long cycle stability 60 cycles (12 h per cycle) are achieved FeCo alloy confined with nitrogen‐doped porous carbon nanofibers (FeCo‐NPCNFs). DFT calculations unveil that introduction active site not only regulates d‐band center alloy, optimizes adsorption intermediates, but also has strong capacity supply hydrogen species. Clearly, this study elucidates effects bimetallic performance electrocatalytic offers avenues designing Fe‐based catalysts realize nitrogen‐neutral cycle.

Language: Английский

---

Regulating the d-Band Center of Metal–Organic Frameworks for Efficient Nitrate Reduction Reaction and Zinc-Nitrate Battery

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(21), P. 16205 - 16213

Published: Oct. 18, 2024

The electrochemical reduction of nitrate ions to valuable ammonia enables the recovery pollutants from industrial wastewater, thereby synchronously balancing nitrogen cycle and achieving NH3 production. However, currently reported electrocatalysts still suffer low yield rate, Faradaic inefficiency, partial current density. Herein, a strategy based on regulation d-band center by Ru doping is presented boost Theoretical calculations unravel that dopant in Ni metal–organic framework shifts neighboring sites upward, optimizing adsorption strength N-intermediates, resulting greatly enhanced reaction performance. synthesized Ru-doped rod array electrode delivers rate 1.31 mmol h–1 cm–2 efficiency 91.5% at −0.6 V versus reversible hydrogen electrode, as well good cycling stability. In view multielectron transfer electrocatalytic activity, Zn-NO3– battery assembled this Zn anode, which high open-circuit voltage 1.421 maximum output power density 4.99 mW cm–2, demonstrating potential application value.

Language: Английский

---

RhNi Bimetallenes with Lattice‐Compressed Rh Skin towards Ultrastable Acidic Nitrate Electroreduction

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(23)

Published: Feb. 26, 2024

Harvesting recyclable ammonia (NH

Language: Английский

---

Red Carbon Mediated Formation of Cu₂O Clusters Dispersed on the Oxocarbon Framework by Fehling's Route and their Use for the Nitrate Electroreduction in Acidic Conditions

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(25)

Published: March 26, 2024

Abstract The oligomers of carbon suboxide, known as red carbon, exhibit a highly conjugated structure and semiconducting properties. Upon mild heat treatment, it transforms into carbonaceous framework rich in oxygen surface terminations, called oxocarbon. In this study, the abundant functionalities are harnessed anchors to create oxocarbon‐supported nanohybrid electrocatalysts. Starting with single atomic Cu (II) strongly coordinated atoms on Fehling reaction leads formation 2 O clusters. Simultaneously, covalent oxocarbon emerges via cross‐linking, providing robust support for Notably, effectively stabilizes clusters very small size, ensuring their high durability acidic conditions presence ammonia. synthesized material exhibits superior electrocatalytic activity nitrate reduction under electrolyte conditions, yield rate ammonium (NH 4 + ) at 3.31 mmol h −1 mg cat Faradaic efficiency 92.5% potential −0.4 V (vs RHE).

Language: Английский

---

Recent Progress and Perspectives on Transition Metal-Based Electrocatalysts for Efficient Nitrate Reduction

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(8), P. 6701 - 6722

Published: April 8, 2024

Electrochemical nitrate reduction is the process of converting into ammonia or nitrogen using electric energy. This saves energy, protects environment, and an important technology for resource recovery water purification. paper examines recent advances in electrochemical research analyzes reaction mechanism path as well influence various factors on through thermodynamic kinetic principles. Second, catalytic performances transition metal electrocatalysts form single metals, alloys, oxides, composites are analyzed detail, which lays foundation rational development new, efficient, stable electrocatalysts. Finally, future directions prospects envisioned.

Language: Английский

---

Earth-abundant electrocatalysts for acidic oxygen evolution

Nature Catalysis, Journal Year: 2024, Volume and Issue: 7(12), P. 1288 - 1304

Published: Dec. 17, 2024

Language: Английский

---

Self-enhanced localized alkalinity at the encapsulated Cu catalyst for superb electrocatalytic nitrate/nitrite reduction to NH ₃ in neutral electrolyte

Science Advances, Journal Year: 2024, Volume and Issue: 10(28)

Published: July 10, 2024

The electrocatalytic nitrate/nitrite reduction reaction (eNO

Language: Английский

---

Synergy between Fe and Mo single atom catalysts for ammonia electrosynthesis

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 347, P. 123816 - 123816

Published: April 24, 2024

Language: Английский

---