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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Efficient bubble/precipitate traffic enables stable seawater reduction electrocatalysis at industrial-level current densities

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: April 5, 2024

Abstract Seawater electroreduction is attractive for future H 2 production and intermittent energy storage, which has been hindered by aggressive Mg 2+ /Ca precipitation at cathodes consequent poor stability. Here we present a vital microscopic bubble/precipitate traffic system (MBPTS) constructing honeycomb-type 3D robust anti-precipitation seawater reduction (SR), massively/uniformly release small-sized bubbles to almost every corner of the cathode repel precipitates without break. Noticeably, optimal with built-in MBPTS not only enables state-of-the-art alkaline SR performance (1000-h stable operation –1 A cm −2 ) but also highly specialized in catalytically splitting natural into greatest ability. Low amounts after prolonged tests under large current densities reflect genuine efficacy our MBPTS. Additionally, flow-type electrolyzer based on stably functions industrially-relevant 500 mA 150 h while unwaveringly sustaining near-100% Faradic efficiency. Note that estimated price (~1.8 US$/kg H2 even cheaper than US Department Energy’s goal (2 ).

Language: Английский

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Selenate promoted stability improvement of nickel selenide nanosheet array with an amorphous NiOOH layer for seawater oxidation

Materials Today Physics, Journal Year: 2023, Volume and Issue: 38, P. 101249 - 101249

Published: Oct. 5, 2023

Language: Английский

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Stabilizing NiFe sites by high-dispersity of nanosized and anionic Cr species toward durable seawater oxidation

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Aug. 5, 2024

Electrocatalytic H

Language: Английский

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Synergism of NiFe layered double hydroxides/phosphides and Co-NC nanorods array for efficient electrocatalytic water splitting

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 470, P. 144348 - 144348

Published: June 24, 2023

Language: Английский

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Work-function-induced electron rearrangement of in-plane FeP@CoP heterojunction enhances all pH range and alkaline seawater hydrogen evolution reaction

Nano Energy, Journal Year: 2023, Volume and Issue: 114, P. 108601 - 108601

Published: June 12, 2023

Language: Английский

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Fabrication of a hierarchical NiTe@NiFe-LDH core-shell array for high-efficiency alkaline seawater oxidation

iScience, Journal Year: 2023, Volume and Issue: 27(1), P. 108736 - 108736

Published: Dec. 15, 2023

Herein, a hierarchical NiTe@NiFe-LDH core-shell array on Ni foam (NiTe@NiFe-LDH/NF) demonstrates its effectiveness for oxygen evolution reaction (OER) in alkaline seawater electrolyte. This NiTe@NiFe-LDH/NF showcases remarkably low overpotentials of 277 mV and 359 achieving current densities 100 500 mA cm

Language: Английский

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Spinel‐Structured High‐Entropy Oxide Nanofibers as Electrocatalysts for Oxygen Evolution in Alkaline Solution: Effect of Metal Combination and Calcination Temperature

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(6)

Published: Oct. 22, 2023

Abstract Defect‐engineering is a viable strategy to improve the activity of nanocatalysts for oxygen evolution reaction (OER), whose slow kinetics still strongly limits broad market penetration electrochemical water splitting as sustainable technology large‐scale hydrogen production. High‐entropy spinel oxides (HESOs) are in focus due their great potential low‐cost OER electrocatalysts. In this work, electrospun HESO nanofibers (NFs), based on (Cr,Mn,Fe,Co,Ni), (Cr,Mn,Fe,Co,Zn) and (Cr,Mn,Fe,Ni,Zn) combinations, with granular architecture oxygen‐deficient surface produced by calcination at low temperature (600 or 500 °C), characterized combination benchtop analytical techniques evaluated electrocatalysts alkaline medium. The variation composition produces complex interdependent changes morphology fibers, crystallinity inversion degree oxide, concentration oxygen‐vacancies, cation distribution lattice, which mirror different properties fibers. best electrocatalytic performance (overpotential Tafel slope 10 mA cm −2 : 360 mV 41 dec −1 , respectively) pertains (Cr 1/5 Mn Fe Co Ni ) 3 O 4 NFs calcined °C results from lower outer 3d‐electron number, e g filling closer its optimal value higher occupation 16 d sites most redox‐active species.

Language: Английский

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Co-doped Ni3S2 nanosheet array: A high-efficiency electrocatalyst for alkaline seawater oxidation

Nano Research, Journal Year: 2023, Volume and Issue: 17(3), P. 1050 - 1055

Published: Aug. 1, 2023

Language: Английский

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