Synergism of Hydrogen-Induced Interstitial Effect and Gold-Induced Alloying Effect in PdAuH Metallene for Urea Electrosynthesis from Nitrate and Carbon Dioxide

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 8, 2025

Urea is a common agricultural fertilizer and industrial raw material, but at present, the traditional production of urea energy-and pollution-intensive. Electrocatalytic coupling CO2 ubiquitous nitrogen sources to synthesize considered as promising alternative method requiring high-performance catalysts boost C–N electrocatalysis process. Herein, hydrogen-intercalated Pd–Au bimetallene (PdAuHene) was prepared by three-step used for electrosynthesis from NO3– CO2, deriving an optimum Faradaic efficiency 33.88% yield rate 6.68 mmol g–1 h–1 applied potential −0.6 V vs RHE. Detailed material characterizations electrochemical studies reveal that metallene structure with ultrathin thickness could improve atomic utilization precious metal atoms, introduction Au H atoms adjust electronic Pd regulate evolution pathway key N-/C-intermediates, promote form urea.

Language: Английский

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FeIr Alloy Optimizes the Trade‐Off Between Nitrate Reduction and Active Hydrogen Generation for Efficient Electro‐Synthesis of Ammonia in Neutral Media

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 10, 2025

Abstract Electrochemically promoted nitrate reduction reaction (NITRR) holds great potential for the “green” synthesis of ammonia (NH 3 ). However, NITRR in neutral media, though close to practical scenario, is often limited by an insufficient supply active hydrogen (*H) due sluggish water cleavage. In this work, it demonstrated that a bimetallic alloy FeIr can optimize trade‐off between and *H formation media. As result, exhibits excellent catalytic performance toward with Faradaic efficiency NH up 97.3% high yield rate 11.67 mg h −1 cm −2 at low working −0.6 V (versus reversible electrode (RHE)), surpassing monometallic catalysts as well majority Fe‐based state‐of‐the‐art. It also found displays remarkable electron rearrangement hetero‐atoms their significant orbital hybridization, which benefits not only but process. Moreover, coupling FeIr‐based methanol oxidation (MOR) results sustainable productions formate combined FE nearly 200% cell‐voltage 2 V. This work thus demonstrates promising strategy designing efficient NITRR.

Language: Английский

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CeO2-based functional materials: Advancing photo and electro-driven catalysis for environmental remediation and energy conversion

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 527, P. 216395 - 216395

Published: Dec. 13, 2024

Language: Английский

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Polyoxometalate-Intercalated Tremella-Like CoNi-LDH Nanocomposites for Electrocatalytic Nitrite–Ammonia Conversion

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(15), P. 6787 - 6797

Published: April 1, 2024

The electrocatalytic reduction of NO2– (NO2RR) holds promise as a sustainable pathway to both promoting the development emerging NH3 economies and allowing closing NOx loop. Highly efficient electrocatalysts that could facilitate this complex six-electron transfer process are urgently desired. Herein, tremella-like CoNi-LDH intercalated by cyclic polyoxometalate (POM) anion P8W48 (P8W48/CoNi-LDH) prepared simple two-step hydrothermal–exfoliation assembly method is proposed an effective electrocatalyst for conversion. introduction POM with excellent redox ability tremendously increased performance in NO2RR process, causing P8W48/CoNi-LDH exhibit large yield 0.369 mmol h–1 mgcat–1 exceptionally high Faradic efficiency 97.0% at −1.3 V vs Ag/AgCl reference electrode 0.1 M phosphate buffer saline (PBS, pH = 7) containing NO2–. Furthermore, demonstrated durability during electrolysis. This work provides new application POM-based nanocomposites electrochemical obtain value-added NH3.

Language: Английский

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Efficient electrocatalytic reduction of nitrate to ammonia using Cu–CeO2 solid solution

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 73, P. 257 - 264

Published: June 8, 2024

Language: Английский

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Research progress of Ce-based electrocatalysts in hydrogen evolution reaction

Journal of Rare Earths, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

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Sulfur Defect Tuning of CuS/BiVO₄ and Understanding the Function of Hydrogen Radicals for Photoelectrochemical Ammonia Production

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 21, 2025

Photoelectrochemical nitrate reduction has been a promising method for ammonia (NH3) production under normal temperatures and neutral conditions. However, hydrogenation is key process in the selective of NH3 during reduction; therefore, inducing active hydrogen inhibiting are noteworthy problem. In this study, BiVO4/CuS (BVO/CS) heterostructure constructed photoelectrochemical reaction (PEC NIRR). The introduction CuS optimizes electron-transfer ability enhances surface catalytic kinetics BVO/CS. At same time, presence sulfur vacancies on promotes adsorption activation nitrate, realizes splitting H2O, successfully generates abundant radicals (H*). generated H* effectively utilized NIRR. yield selectivity optimal BVO/CS reach 30.55 μg h-1 cm-2 43.8%, respectively, which 2.65 2.39 times that bare BVO. Therefore, work determines role hydrogenation, providing novel strategy boosting PEC CuS/BiVO4 was fabricated reduction. Sulfur defects enabled generation radicals, promoted production.

Language: Английский

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Chloroperoxidase Immobilized on Pd₂Ag Nanoparticles for the Electrocatalytic Reduction of Nitrate to Ammonia

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 26, 2025

Language: Английский

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Bimetallic PdCo and PdNi Nanoparticles Supported on Covalent Organic Frameworks as Catalysts for the Hydrogenation of 4-Nitrophenol

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(11), P. 13147 - 13155

Published: May 31, 2024

To obtain a recyclable and environmentally friendly solid catalyst with excellent catalytic properties selectivity for 4-nitrophenol (4-NP) hydrogenation, herein, covalent organic frameworks (COFs) are used as the support. Tiny PdCo alloy particles confined in pores of COFs to acquire PdCo/COFs, an extremely narrow PtCo size distribution (6.28 ± 2.85 nm). The effect Pd+Co loading Pd/Co atomic ratio on behaviors PdCo/COFs 4-NP hydrogenation is explored. as-gained (Pd─1.72, Co─1.23 wt %) exhibits good (conversion─90.5%, 4-aminophenol (4-AP) > 99.0%, conversion─11.0%, TOF─turnover frequency─44.2 min–1) under quite moderate reaction conditions (40 °C, 3.0 MPa hydrogen pressure), have superior stability. Additionally, property better than that monometallic supported catalysts (Pd/COFs or Co/COFs) PdNi/COFs. It can be considered formation beneficial activation 4-NP. analyzed by XRD, XPS, ICP-OES, SEM-EDX, BET, TEM, HRTEM, STEM-EDX elemental analysis, aberration-corrected STEM (AC-STEM), confirming tiny uniformly loaded COFs. samples advantages outstanding stability thus their own desired industrial application potential.

Language: Английский

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Rapid Fabrication of N-, Cu-, and Co-Doped Electrodes with Strong Electronic Coupling by Cold Plasma for Electrocatalytic Reduction of Nitrate to Ammonia

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(42), P. 19809 - 19818

Published: Oct. 9, 2024

Electrochemical NO

Language: Английский

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