Advances in ammonia electrosynthesis from ambient nitrate/nitrite reduction

Chem, Год журнала: 2023, Номер 9(7), С. 1768 - 1827

Опубликована: Июнь 21, 2023

Язык: Английский

---

Electrochemical Nitrate Reduction: Ammonia Synthesis and the Beyond

Advanced Materials, Год журнала: 2023, Номер 36(17)

Опубликована: Июнь 9, 2023

Natural nitrogen cycle has been severely disrupted by anthropogenic activities. The overuse of N-containing fertilizers induces the increase nitrate level in surface and ground waters, substantial emission oxides causes heavy air pollution. Nitrogen gas, as main component air, used for mass ammonia production over a century, providing enough nutrition agriculture to support world population increase. In last decade, researchers have made great efforts develop processes under ambient conditions combat intensive energy consumption high carbon associated with Haber-Bosch process. Among different techniques, electrochemical reduction reaction (NO

Язык: Английский

---

Regulating active hydrogen adsorbed on grain boundary defects of nano-nickel for boosting ammonia electrosynthesis from nitrate

Energy & Environmental Science, Год журнала: 2023, Номер 16(6), С. 2611 - 2620

Опубликована: Янв. 1, 2023

The grain boundary defect engineered Ni nanoparticles has been explored for boosting selective nitrate electroreduction to ammonia, and its NH 3 generation rate is much higher than those of the reported copper or noble metal-based catalysts.

Язык: Английский

---

Enabled Efficient Ammonia Synthesis and Energy Supply in a Zinc–Nitrate Battery System by Separating Nitrate Reduction Process into Two Stages

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(13)

Опубликована: Фев. 2, 2023

The aqueous electrocatalytic reduction of NO3- into NH3 (NitrRR) presents a sustainable route applicable to production and potentially energy storage. However, the NitrRR involves directly eight-electron transfer process generally required large overpotential (<-0.2 V versus reversible hydrogen electrode (vs. RHE)) reach optimal efficiency. Here, inspired by biological nitrate respiration, was separated two stages along [2+6]-electron pathway alleviate kinetic barrier. system employed Cu nanowire catalyst produces NO2- with current efficiencies 91.5 % 100 %, respectively at lower overpotentials (>+0.1 vs. RHE). high efficiency for such further explored in zinc-nitrate battery. This battery could be specified output voltage 0.70 V, an average density 566.7 Wh L-1 10 mA cm-2 power 14.1 mW , which is well beyond all previously reported similar concepts.

Язык: Английский

---

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

Nature Communications, Год журнала: 2023, Номер 14(1)

Опубликована: Дек. 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.

Язык: Английский

---

Atomic coordination environment engineering of bimetallic alloy nanostructures for efficient ammonia electrosynthesis from nitrate

Proceedings of the National Academy of Sciences, Год журнала: 2023, Номер 120(32)

Опубликована: Июль 31, 2023

Electrochemical nitrate reduction reaction (NO 3 RR) to ammonia has been regarded as a promising strategy balance the global nitrogen cycle. However, it still suffers from poor Faradaic efficiency (FE) and limited yield rate for production on heterogeneous electrocatalysts, especially in neutral solutions. Herein, we report one-pot synthesis of ultrathin nanosheet-assembled RuFe nanoflowers with low-coordinated Ru sites enhance NO RR performances electrolyte. Significantly, exhibit outstanding FE 92.9% 38.68 mg h −1 cat (64.47 ) at −0.30 −0.65 V (vs. reversible hydrogen electrode), respectively. Experimental studies theoretical calculations reveal that are highly electroactive an increased d-band center guarantee efficient electron transfer, leading low energy barriers reduction. The demonstration rechargeable zinc-nitrate batteries large-specific capacity using indicates their great potential next-generation electrochemical systems.

Язык: Английский

---

Weakened d–p orbital hybridization inin situreconstructed Ru/β-Co(OH)₂heterointerfaces for accelerated ammonia electrosynthesis from nitrates

Energy & Environmental Science, Год журнала: 2023, Номер 16(6), С. 2483 - 2493

Опубликована: Янв. 1, 2023

Electron-deficient Ru sites at Ru/Co(OH) 2 heterointerfaces weaken the d–p orbital hybridization ability and further facilitate desorption of ammonia intermediates, thereby achieving ultrahigh nitrate electroreduction activity towards ammonia.

Язык: Английский

---

Iron‐Based Nanocatalysts for Electrochemical Nitrate Reduction

Small Methods, Год журнала: 2022, Номер 6(10)

Опубликована: Сен. 14, 2022

Abstract Nitrate has a high level of stability and persistence in water, endangering human health aquatic ecosystems. Due to its reliability efficiency, the electrochemical nitrate reduction reaction (NO 3 RR) is regarded as best available option for mitigating excess water wastewater, especially removal trace levels nitrate. One most critical factors are catalysts, which directly affect efficiency removal. Iron‐based nanocatalysts, have advantages nontoxicity, wide availability, low cost, emerged promising NO RR material recent years. This review covers major aspects iron‐based nanocatalysts RR, including synthetic methods, structural design, performance enhancement, electrocatalytic test, mechanism. The progress mechanism functional modified structures reviewed from perspectives loading, doping, assembly strategies, order realize conversion pollutant harmless nitrogen or ammonia other sustainable products. Finally, challenges future directions development low‐cost highly‐efficient explored.

Язык: Английский

---

Zn-based batteries for sustainable energy storage: strategies and mechanisms

Chemical Society Reviews, Год журнала: 2024, Номер 53(10), С. 4877 - 4925

Опубликована: Янв. 1, 2024

This review systematically summarizes various redox mechanisms in Zn-based batteries and design strategies to improve their electrochemical performance, which provides a reference for future development of high-performance batteries.

Язык: Английский

---

High-efficiency electrocatalytic nitrite reduction toward ammonia synthesis on CoP@TiO2 nanoribbon array

iScience, Год журнала: 2023, Номер 26(7), С. 107100 - 107100

Опубликована: Июнь 16, 2023

Electrochemical reduction of nitrite (NO2-) can satisfy the necessity for NO2- contaminant removal and deliver a sustainable pathway ammonia (NH3) generation. Its practical application yet requires highly efficient electrocatalysts to boost NH3 yield Faradaic efficiency (FE). In this study, CoP nanoparticle-decorated TiO2 nanoribbon array on Ti plate (CoP@TiO2/TP) is verified as high-efficiency electrocatalyst selective NH3. When measured in 0.1 M NaOH with NO2-, freestanding CoP@TiO2/TP electrode delivers large 849.57 μmol h-1 cm-2 high FE 97.01% good stability. Remarkably, subsequently fabricated Zn-NO2- battery achieves power density 1.24 mW while delivering 714.40 μg cm-2.

Язык: Английский

---