Bi1‐CuCo2O4 Hollow Carbon Nanofibers Boosts NH3 Production from Electrocatalytic Nitrate Reduction DOI

Hexing Lin,

Jinshan Wei, Ying Guo

и другие.

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Авг. 6, 2024

Abstract Ammonia, as a high‐energy‐density carrier for hydrogen storage, is in great demand worldwide. Electrocatalytic nitrate reduction reaction (NO 3 RR) provides green NH production process. However, the complex pathways NO RR to and difficulty controlling intermediate products limit Herein, by incorporating atomic‐level bismuth (Bi) into CuCo 2 O 4 hollow carbon nanofibers, catalytic activity of electrocatalyst enhanced. The maximum Faradaic efficiency Bi 1 ‐CuCo 95.53%, with an yield 448.74 µmol h −1 cm −2 at −0.8 V versus RHE. Density Functional Theory calculations show that presence lowers barrier hydrogenation step from *NO H, while promoting mass transfer on release *NH reactivation surface‐active sites. Differential charge density also after doping, supplied catalyst − increases 0.62 0.72 e ‐ , thus reasoned enhanced activity. established nitrate‐Zn battery shows energy 2.81 mW implying potential application.

Язык: Английский

Electrochemical nitrate reduction in acid enables high-efficiency ammonia synthesis and high-voltage pollutes-based fuel cells DOI Creative Commons
Rong Zhang, Chuan Li, Huilin Cui

и другие.

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

Процитировано

125
Crystal Phase Engineering of Ultrathin Alloy Nanostructures for Highly Efficient Electroreduction of Nitrate to Ammonia DOI Creative Commons
Yunhao Wang,

Fengkun Hao,

Mingzi Sun

и другие.

Advanced Materials, Год журнала: 2024, Номер 36(14)

Опубликована: Янв. 26, 2024

Abstract Electrocatalytic nitrate reduction reaction (NO 3 RR) toward ammonia synthesis is recognized as a sustainable strategy to balance the global nitrogen cycle. However, it still remains great challenge achieve highly efficient production due complex proton‐coupled electron transfer process in NO RR. Here, controlled of RuMo alloy nanoflowers (NFs) with unconventional face‐centered cubic (fcc) phase and hexagonal close‐packed/fcc heterophase for RR reported. Significantly, fcc NFs demonstrate high Faradaic efficiency 95.2% large yield rate 32.7 mg h −1 cat at 0 −0.1 V (vs reversible hydrogen electrode), respectively. In situ characterizations theoretical calculations have unraveled that possess highest d‐band center superior electroactivity, which originates from strong Ru─Mo interactions intrinsic activity phase. The optimal electronic structures supply adsorption key intermediates suppression competitive evolution, further determines remarkable performance. successful demonstration high‐performance zinc‐nitrate batteries suggests their substantial application potential electrochemical energy systems.

Язык: Английский

Процитировано

78
Electrocatalytic nitrate-to-ammonia conversion on CoO/CuO nanoarrays using Zn–nitrate batteries DOI
Shanshan Chen, Gaocan Qi,

Ruilian Yin

и другие.

Nanoscale, Год журнала: 2023, Номер 15(48), С. 19577 - 19585

Опубликована: Янв. 1, 2023

Zn-NO3- batteries can generate electricity while producing NH3 in an environmentally friendly manner, making them a very promising device. However, the conversion of NO3- to involves proton-assisted 8-electron (8e-) transfer process with high kinetic barrier, requiring high-performance catalysts realize potential applications this technology. Herein, we propose heterostructured CoO/CuO nanoarray electrocatalyst prepared on copper foam (CoO/CuO-NA/CF) that electrocatalytically and efficiently convert at low achieves maximum yield 296.9 μmol h-1 cm-2 Faraday efficiency (FE) 92.9% -0.2 V vs. reversible hydrogen electrode (RHE). Impressively, battery based monolithic CoO/CuO-NA/CF delivers 60.3 cm-2, FENH3 82.0%, power density 4.3 mW cm-2. This study provides paradigm for catalyst preparation energy-efficient production simultaneously generating electrical energy.

Язык: Английский

Процитировано

64
Strategies and applications of electrocatalytic nitrate reduction towards ammonia DOI
Huijie Zhang,

K. Fang,

Jian Yang

и другие.

Coordination Chemistry Reviews, Год журнала: 2024, Номер 506, С. 215723 - 215723

Опубликована: Фев. 26, 2024

Язык: Английский

Процитировано

53
Boosting Nitrate to Ammonia via the Optimization of Key Intermediate Processes by Low‐Coordinated Cu–Cu Sites DOI
Kun Huang, Kun Tang, Mohan Wang

и другие.

Advanced Functional Materials, Год журнала: 2024, Номер 34(24)

Опубликована: Янв. 17, 2024

Abstract The electrochemical reduction of nitrate to ammonia (NO 3 RR) has emerged as a promising but challenging orientation in sustainable development. Cu is one the most effective NO RR catalysts. However, accumulation 2 − on their surface erected bars further improvement efficiency. Herein, Cu‐based electrocatalyst with low‐coordinated atoms (Cu‐LC) synthesized via instantaneous ablation and rapid cooling target by pulse laser proposed new electrocatalyst, which exhibits enhanced activity NH selectivity 97.01%, yield rate 0.624 mmol h −1 cm −2 at −0.8 V versus RHE long‐term durability, superior reported introduction sites upshifts d‐band center near Fermi Level, enhancing adsorption key intermediates ( * , NO) RR, also effectively regulating generation hydrogenation process, inhibiting Cu‐LC surface, thus achieving efficient production. Furthermore, when evaluated cathode material Zn–NO battery, an open circuit voltage 1.3 power density 3.1 mW are achieved Cu‐LC‐based highlighting multifunctional system for production energy supply.

Язык: Английский

Процитировано

50
Regulating the d-Band Center of Metal–Organic Frameworks for Efficient Nitrate Reduction Reaction and Zinc-Nitrate Battery DOI

Yuanhui Yao,

Xiaofei Wei,

Haiqiao Zhou

и другие.

ACS Catalysis, Год журнала: 2024, Номер 14(21), С. 16205 - 16213

Опубликована: Окт. 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.

Язык: Английский

Процитировано

48
Atomic reconstruction for realizing stable solar-driven reversible hydrogen storage of magnesium hydride DOI Creative Commons
Xiaoyue Zhang, Shunlong Ju,

Chaoqun Li

и другие.

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Апрель 1, 2024

Abstract Reversible solid-state hydrogen storage of magnesium hydride, traditionally driven by external heating, is constrained massive energy input and low systematic density. Herein, a single phase Mg 2 Ni(Cu) alloy designed via atomic reconstruction to achieve the ideal integration photothermal catalytic effects for stable solar-driven MgH . With intra/inter-band transitions its hydrogenated state, over 85% absorption in entire spectrum achieved, resulting temperature up 261.8 °C under 2.6 W cm −2 Moreover, reaction thermodynamically kinetically favored, imbalanced distribution light-induced hot electrons within CuNi facilitates weakening Mg-H bonds , enhancing “hydrogen pump” effect Ni(Cu)/Mg Ni(Cu)H 4 The reversible generation upon repeated dehydrogenation process enables continuous roles stably, ensuring direct action localized heat on sites without any loss, thereby achieving 6.1 wt.% H capacity with 95% retention 3.5

Язык: Английский

Процитировано

44
Molten salts etching strategy construct alloy/MXene heterostructures for efficient ammonia synthesis and energy supply via Zn-nitrite battery DOI

Zhijie Cui,

Pengwei Zhao,

Honghai Wang

и другие.

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер 348, С. 123862 - 123862

Опубликована: Апрель 24, 2024

Язык: Английский

Процитировано

40
Ambient Electrochemical Ammonia Synthesis: From Theoretical Guidance to Catalyst Design DOI Creative Commons

Jianjia Mu,

Xuan‐Wen Gao,

Tong Yu

и другие.

Advanced Science, Год журнала: 2024, Номер 11(15)

Опубликована: Фев. 12, 2024

Abstract Ammonia, a vital component in the synthesis of fertilizers, plastics, and explosives, is traditionally produced via energy‐intensive environmentally detrimental Haber–Bosch process. Given its considerable energy consumption significant greenhouse gas emissions, there growing shift toward electrocatalytic ammonia as an eco‐friendly alternative. However, developing efficient electrocatalysts capable achieving high selectivity, Faraday efficiency, yield under ambient conditions remains challenge. This review delves into decades‐long research synthesis, highlighting evolution fundamental principles, theoretical descriptors, reaction mechanisms. An in‐depth analysis nitrogen reduction (NRR) nitrate (NitRR) provided, with focus on their electrocatalysts. Additionally, theories behind electrocatalyst design for are examined, including Gibbs free approach, Sabatier principle, d ‐band center theory, orbital spin states. The culminates comprehensive overview current challenges prospective future directions development NRR NitRR, paving way more sustainable methods production.

Язык: Английский

Процитировано

36
Synergistic Effect of Ni/Ni(OH)2 Core‐Shell Catalyst Boosts Tandem Nitrate Reduction for Ampere‐Level Ammonia Production DOI

Xinyue Shi,

Minghui Xie,

Kaiwen Yang

и другие.

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(27)

Опубликована: Апрель 23, 2024

Electrocatalytic reduction of nitrate to ammonia provides a green alternate the Haber-Bosch method, yet it suffers from sluggish kinetics and low yield rate. The follows tandem reaction nitrite subsequent hydrogenation generate ammonia, Faraday efficiency (FE) is limited by competitive hydrogen evolution reaction. Herein, we design heterostructure catalyst remedy above issues, which consists Ni nanosphere core Ni(OH)

Язык: Английский

Процитировано

36