Tandem Electrocatalytic Nitrate Reduction to Ammonia on MBenes

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(13)

Published: Feb. 3, 2023

We demonstrate the great feasibility of MBenes as a new class tandem catalysts for electrocatalytic nitrate reduction to ammonia (NO3 RR). As proof concept, FeB2 is first employed model MBene catalyst NO3 RR, showing maximum NH3 -Faradaic efficiency 96.8 % with corresponding yield 25.5 mg h-1 cm-2 at -0.6 V vs. RHE. Mechanistic studies reveal that exceptional RR activity arises from catalysis mechanism, is, B sites activate NO3- form intermediates, while Fe dissociate H2 O and increase *H supply on promote intermediate hydrogenation enhance -to-NH3 conversion.

Language: Английский

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Single‐Atom Bi Alloyed Pd Metallene for Nitrate Electroreduction to Ammonia

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(12)

Published: Jan. 15, 2023

Abstract Electrochemical reduction of nitrate to ammonia (NO 3 RR) holds a great promise for attaining both NH electrosynthesis and wastewater purification. Herein, single‐atom Bi alloyed Pd metallene (Bi 1 Pd) is reported as highly effective NO RR catalyst, showing near 100% ‐Faradaic efficiency with the corresponding yield 33.8 mg h −1 cm −2 at −0.6 V versus RHE, surpassing those almost all ever catalysts. In‐depth theoretical operando spectroscopic investigations unveil that electronically couples its neighboring atoms synergistically activate − destabilize *NO on Pd, leading reduced energy barrier potential‐determining step (*NO→*NOH) enhanced protonation energetics ‐to‐NH pathway.

Language: Английский

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High-efficiency overall alkaline seawater splitting: using a nickel–iron sulfide nanosheet array as a bifunctional electrocatalyst

Journal of Materials Chemistry A, Journal Year: 2022, Volume and Issue: 11(3), P. 1116 - 1122

Published: Dec. 22, 2022

NiFeS nanosheet array on Ni foam (NiFeS/NF) behaves as a superb bifunctional electrocatalyst for overall seawater splitting, attaining commercially demanded current density of 500 mA cm −2 at low cell voltage 1.85 V with robust stability.

Language: Английский

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Multidiscipline Applications of Triboelectric Nanogenerators for the Intelligent Era of Internet of Things

Nano-Micro Letters, Journal Year: 2022, Volume and Issue: 15(1)

Published: Dec. 20, 2022

In the era of 5G and Internet things (IoTs), various human-computer interaction systems based on integration triboelectric nanogenerators (TENGs) IoTs technologies demonstrate feasibility sustainable self-powered functional systems. The rapid development intelligent applications TENGs mainly relies supplying harvested mechanical energy from surroundings implementing active sensing, which have greatly changed way human production daily life. This review introduced TENG in multidiscipline scenarios IoTs, including smart agriculture, industry, city, emergency monitoring, machine learning-assisted artificial intelligence applications. challenges future research directions toward also been proposed. extensive developments will push forward into an autonomy fashion.

Language: Английский

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Lewis Acid Fe‐V Pairs Promote Nitrate Electroreduction to Ammonia

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(13)

Published: Jan. 18, 2023

Abstract Electrochemical reduction of nitrate to ammonia (NO 3 RR) has been recognized as an appealing approach realize both sustainable NH production and waste removal. Herein, from the perspective Lewis acid‐base interaction, a single‐atom Fe‐doped V 2 O 5 (Fe‐V ) catalyst enriched is designed with acid sites, which present maximum ‐Faradaic efficiency 97.1% corresponding yield 12.5 mg h −1 cm −2 at –0.7 versus RHE. Mechanistic studies based on theoretical calculations operando spectroscopic characterizations identify creation Fe‐V pairs , can synergetically activate NO − promote hydrogenation energetics, restrain hydrogen evolution, leading enhanced RR activity selectivity.

Language: Английский

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Electrocatalytic seawater splitting: Nice designs, advanced strategies, challenges and perspectives

Materials Today, Journal Year: 2023, Volume and Issue: 69, P. 193 - 235

Published: Sept. 19, 2023

Language: Английский

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Carbon Oxyanion Self‐Transformation on NiFe Oxalates Enables Long‐Term Ampere‐Level Current Density Seawater Oxidation

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 63(1)

Published: Nov. 23, 2023

Seawater electrolysis is an attractive way of making H2 in coastal areas, and NiFe-based materials are among the top options for alkaline seawater oxidation (ASO). However, ample Cl- can severely corrode catalytic sites lead to limited lifespans. Herein, we report that situ carbon oxyanion self-transformation (COST) from oxalate carbonate on a monolithic NiFe micropillar electrode allows safeguard high-valence metal reaction ASO. In situ/ex studies show spontaneous, timely, appropriate COST safeguards active against attack during ASO even at ampere-level current density (j). Our catalyst shows efficient stable performance, which requires overpotential as low 349 mV attain j 1 A cm-2 . Moreover, with protective surface CO32- exhibits slight activity degradation after 600 h under seawater. This work reports effective design concepts level self-transformation, acting momentous step toward defending seawater-to-H2 conversion systems.

Language: Английский

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Iridium single-atom catalyst for highly efficient NO electroreduction to NH3

Nano Research, Journal Year: 2023, Volume and Issue: 16(7), P. 8737 - 8742

Published: March 8, 2023

Language: Английский

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p-Block Antimony Single-Atom Catalysts for Nitric Oxide Electroreduction to Ammonia

ACS Energy Letters, Journal Year: 2023, Volume and Issue: 8(3), P. 1281 - 1288

Published: Feb. 3, 2023

Electrocatalytic NO reduction to NH3 (NORR) offers a prospective approach attain both harmful removal and efficient electrosynthesis. Main-group p-block metals are promising NORR candidates but still lack adequate exploration. Herein, Sb single atoms confined in amorphous MoO3 (Sb1/a-MoO3) designed as an catalyst, exhibiting the highest yield rate of 273.5 μmol h–1 cm–2 NO-to-NH3 Faradaic efficiency 91.7% at −0.6 V vs RHE. In situ spectroscopic characterizations theoretical computations reason that outstanding performance Sb1/a-MoO3 arises from isolated Sb1 sites, which can optimize adsorption *NO/*NHO lower reaction energy barriers simultaneously exhibit higher affinity than H2O/H species. Moreover, our strategy be extended prepare Bi1/a-MoO3, showing high property, demonstrating immense potential metal single-atom catalysts toward high-performing electrocatalysis.

Language: Английский

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N, O-doped carbon foam as metal-free electrocatalyst for efficient hydrogen production from seawater

Nano Research, Journal Year: 2022, Volume and Issue: 15(10), P. 8922 - 8927

Published: Aug. 19, 2022

Language: Английский

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