ACS Applied Energy Materials, Год журнала: 2025, Номер unknown
Опубликована: Июнь 4, 2025
Язык: Английский
Advanced Functional Materials, Год журнала: 2024, Номер unknown
Опубликована: Сен. 16, 2024
Abstract The electrocatalytic nitrate reduction reaction (NO 3 − RR) presents a promising pathway for achieving both ammonia (NH ) electrosynthesis and water pollutant removal simultaneously. Among various electrocatalysts explored, 2D materials have emerged as candidates due to their ability regulate electronic states active sites through doping. However, the impact of doping effects in on mechanism NO RR remains relatively unexplored. Here, Ni‐doped MoS 2 (Ni‐MoS nanosheets are investigated model system, demonstrating enhanced performance compared undoped counterparts. By controlling concentration, Ni‐MoS achieve remarkable faradic efficiency (FE) 92.3% NH at −0.3 V RHE with excellent stability. mechanistic studies reveal that elevation performances originates from generation more hydrogen acceleration nitrite facilitated by Ni Combining experimental observations theoretical calculations it is revealed appropriate level can enhance *NO adsorption strength, thereby facilitating subsequent steps. Together demonstration Zn−NO battery devices, work provides new insights into design regulation material catalysts efficient RR.
Язык: Английский
Процитировано
13
Green Energy & Environment, Год журнала: 2025, Номер unknown
Опубликована: Янв. 1, 2025
Язык: Английский
Процитировано
1
International Journal of Molecular Sciences, Год журнала: 2025, Номер 26(4), С. 1650 - 1650
Опубликована: Фев. 14, 2025
A sustainable reaction of electrocatalytic nitrate conversion in ammonia production (NO3RR) occurring under ambient conditions is currently prime interest, as well urgent research due to the real potential replacement environmentally unfavorable Haber-Bosch process. Herein, a series electrocatalysts based on two-component cobalt alloys was synthesized using low-cost non-noble metals Co, Fe, Cr, and also Si. The samples were characterized studied by following methods: SEM, EDX, XRD (both transmission reflection), UV-VIS spectroscopy, optical microscopy, linear (and cyclic) voltammetry, chronoamperometry, electrochemical impedance spectroscopy. Beyond that, determination electrochemically active surface area carried out for all electrocatalysts. Unexpectedly, sample having an intermetallic compound (IMC) composition Co2Si turned be most highly effective. highest Faradaic efficiency (FE) 80.8% at E = -0.585 V (RHE) yield rate 22.3 µmol h-1 cm-2 -0.685 indicate progressive role IMC main component electrocatalyst. Thus, this study demonstrates promise enormous efficient NO3RR. This work can serve primarily starting point future studies reactions catalysts containing metals.
Язык: Английский
Процитировано
0
ACS Nano, Год журнала: 2025, Номер unknown
Опубликована: Март 9, 2025
The electrocatalytic nitrate reduction to hydroxylamine (NH2OH) is a challenging catalytic process that has gained significant attention. However, its performance hindered by the low selectivity of electrocatalysts. Here, intermetallic PtSn nanosheets with p–d orbital hybridization have been synthesized, which significantly enhances NH2OH. Faradaic efficiency NH2OH reaches maximum 82.83 ± 1.55% at −0.10 V versus reversible hydrogen electrode (vs RHE), and yield achieves 6.15 0.32 mmol h–1 mgcat–1 −0.25 vs RHE. Mechanistic studies reveal between p-block Sn d-block Pt effectively adsorption desorption boost electrochemical synthesis. Given their excellent in synthesis NH2OH, are utilized as cathode an alkaline-acid hybrid Zn–NO3– battery facilitate production achieving FE 80.42%.
Язык: Английский
Процитировано
0
Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 161855 - 161855
Опубликована: Март 1, 2025
Язык: Английский
Процитировано
0
Advanced Functional Materials, Год журнала: 2025, Номер unknown
Опубликована: Апрель 14, 2025
Abstract Electrocatalytic nitrate reduction (NO 3 RR) to ammonia (NH ) has great potential address the challenges caused by Habor‐Bosch process. However, sluggish kinetic, complex mechanisms and competitive reactions seriously reduce Faradaic efficiency (FE) yield of NH . Transition metal‐based compounds are promising catalysts for electrocatalytic NO RR, where anions can tune electronic structure metal cation sites. In this work, oxygen (O) phosphorus (P) introduced regulate nickel (Ni) reveal mechanism anion regulation in RR. The electrosynthesis performance is ranked as follows: Ni 2 P surpasses Ni, which turn outperforms NiO. Notably, nanosheets exhibit a maximum FE 97.4% 15.4 mg h − ¹ cm −2 Characterization theoretical calculation indicate that introduction moderately alters resulting reduced energy barriers rate‐limiting step RR improved H O decomposition generate active hydrogen, subsequently enhances production. This work highlights critical role
Язык: Английский
Процитировано
0
Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 180652 - 180652
Опубликована: Апрель 1, 2025
Язык: Английский
Процитировано
0
Energy & Environmental Science, Год журнала: 2025, Номер unknown
Опубликована: Янв. 1, 2025
This work highlights the potential of nitrate reduction as a viable and sustainable alternative for green ammonia production, bridging gap between fundamental research industrial application.
Язык: Английский
Процитировано
0
Advanced Functional Materials, Год журнала: 2025, Номер unknown
Опубликована: Май 15, 2025
Abstract The electrocatalytic reduction of nitrate (NO 3 RR) is essential for environmental remediation and the nitrogen cycle, yet effects local microenvironment at multiple‐level on catalysis remain largely unclear. This review focuses analyzing impact microenvironmental engineering NO RR from multiscopic. Four aspects are detailed understanding regulation in RR, that are, electronic/molecular interactions (theory simulations), catalysts/reactants (intrinsic activity modulation), solution (anion/cation effect) diffusion (electrocatalytic reactor design). Additionally, relevant situ characterization techniques various material systems (metals, compounds, carbon composites, organic composites) discussed detail can modulate reaction microenvironment. Given potential large‐scale applications, necessary designs also summarized industrial level optimized performance. concludes by outlining future research directions enhancing microenvironment, which will be crucial developing efficient catalysts expanding application microenvironments.
Язык: Английский
Процитировано
0
Small, Год журнала: 2025, Номер unknown
Опубликована: Май 16, 2025
Abstract Cu‐based catalysts have shown promising results for the electrocatalytic nitrate reduction reaction (NO 3 RR) owing to their favorable ability bind and activate NO ⁻ , whereas improvement in catalytic RR performance NH production is significantly limited by strong adsorption of *NO 2 which hinders subsequent hydrogenation steps. Herein, a facile situ exsolution strategy proposed prepare series La(OH) @CuCo alloy heterostructures. The optimal /CuCo heterostructures exhibit better than /Cu under neutral condition, with high yield rate 8.80 mg h −1 cat Faradaic efficiency 76.6% at −0.9 V. Ex x‐ray photoelectron spectroscopy electrochemical Fourier transform infrared combination theoretical calculation demonstrated that alloying Cu Co heterostructure construction can effectively modulate electronic structure optimize strength intermediates during process, promote form *NOH desorption *NH on catalyst surface, ultimately enhanced performance.
Язык: Английский
Процитировано
0