Synergistic multisite CuPdP nanodendrites for efficient ambient neutral electrosynthesis of ammonia from nitrate

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 490, P. 151519 - 151519

Published: April 22, 2024

Language: Английский

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Electronic Metal–Support Interaction Triggering Interfacial Charge Polarization over CuPd/N‐Doped‐C Nanohybrids Drives Selectively Electrocatalytic Conversion of Nitrate to Ammonia

Small, Journal Year: 2022, Volume and Issue: 18(42)

Published: Sept. 16, 2022

Selective electrocatalytic nitrate-to-ammonia conversion holds significant potential in treatment of nitrate wastewater and simultaneously produces high-value-added ammonia. However, today's development technology remains hindered by the lack electrocatalysts with high activity selectivity. In this work, metal-organic framework-derived CuPd bimetallic nanoparticles/nitrogen-doped carbon (CuPd/CN) hybrid nanoarrays for efficient ammonia electrosynthesis from are designed synthesized. Systematic characterization reveals that electronic metal-support interaction between nanoparticles N-doped nanocarbon matrix could trigger interfacial charge polarization over CuPd/CN composite make Cu sites electron deficient, which is conducive to adsorption ions. Moreover, Pd atom separate atoms catalyze dissociation H2 O molecules form adsorbed H species, evolves into hydrogen radicals behaves as dominant reactive species accelerating electrocatalysis. These advantages endow faradaic efficiency (96.16%), selectivity (92.08%) well excellent catalytic stability electroreduction

Language: Английский

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Sulfur Vacancy-Rich Amorphous Rh Metallene Sulfide for Electrocatalytic Selective Synthesis of Aniline Coupled with Efficient Sulfion Degradation

ACS Nano, Journal Year: 2022, Volume and Issue: 17(1), P. 790 - 800

Published: Dec. 27, 2022

The construction of efficient and stable electrocatalysts is widespread research significance for electrocatalytic coupling reactions. Herein, an amorphous Rh metallene sulfide with sulfur-rich vacancies (a-RhS2–x metallene) synthesized the cathodic nitrobenzene (Ph-NO2) electroreduction reaction (ERR) to aniline (Ph-NH2) coupled anodic sulfur ion (S2–) oxidation (SOR) in a coelectrolysis system. On one hand, structure can provide enough reactive site. other amorphization introduced S generate rich defects ligand unsaturated sites improve intrinsic activity active sites. Due these advantages, a-RhS2–x exhibits superior performance Ph-NO2 ERR SOR. Inspiringly, assembled system, required overpotential only 0.442 V at 10 mA cm–2 drive SOR, which allows promising energy-efficient electrolysis high value-added chemicals.

Language: Английский

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Engineering Under‐Coordinated Active Sites with Tailored Chemical Microenvironments over Mosaic Bismuth Nanosheets for Selective CO₂ Electroreduction to Formate

Small, Journal Year: 2023, Volume and Issue: 19(16)

Published: Jan. 20, 2023

Selective electrochemical reduction of CO2 into fuels or chemical feedstocks is a promising avenue to achieve carbon-neutral goal, but its development severely limited by the lack highly efficient electrocatalysts. Herein, cation-exchange strategy combined with self-reconstruction successfully develop diethylenetriamine-functionalized mosaic Bi nanosheets (mBi-DETA NSs) for selective electrocatalytic formate, delivering superior formate Faradaic efficiency 96.87% at low potential -0.8 VRHE . Mosaic nanosheet morphology can sufficiently expose under-coordinated active sites and promote activation molecules form OCHO- * intermediate. Moreover, in situ attenuated total reflectance infrared spectra further corroborate that surface microenvironment modulation via DETA functionalization improve adsorption on catalyst stabilize key intermediate (OCHO- *) due presence amine groups, thus facilitate -to-HCOO- reaction kinetics formation.

Language: Английский

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Rare-earth La-doped VS_2−xfor electrochemical nitrate reduction to ammonia

Inorganic Chemistry Frontiers, Journal Year: 2023, Volume and Issue: 10(7), P. 2014 - 2021

Published: Jan. 1, 2023

A rare-earth La-doped VS 2−x is reported as an effective catalyst for electrocatalytic nitrate-to-ammonia conversion, which attributed to the synergy of La-dopants and S-vacancies promote NO 3 RR suppress hydrogen evolution.

Language: Английский

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