Boosting Alkaline Seawater Oxidation of CoFe‐layered Double Hydroxide Nanosheet Array by Cr Doping

Small, Journal Year: 2023, Volume and Issue: 20(13)

Published: Nov. 14, 2023

The pursuit of stable and efficient electrocatalysts toward seawater oxidation is great interest, yet it poses considerable challenges. Herein, the utilization Cr-doped CoFe-layered double hydroxide nanosheet array reported on nickel-foam (Cr-CoFe-LDH/NF) as an electrocatalyst for oxygen evolution reaction in alkaline seawater. Cr-CoFe-LDH/NF catalyst can achieve current densities 500 1000 mA cm

Language: Английский

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Recent advances in iron-based sulfides electrocatalysts for oxygen and hydrogen evolution reaction

Chinese Chemical Letters, Journal Year: 2023, Volume and Issue: 35(1), P. 108900 - 108900

Published: Aug. 9, 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, Journal Year: 2023, Volume and Issue: 136(1)

Published: Nov. 23, 2023

Abstract Seawater electrolysis is an attractive way of making H 2 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 1 A cm −2 . Moreover, with protective surface CO 3 2− 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‐H conversion systems.

Language: Английский

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Progress in Manipulating Dynamic Surface Reconstruction via Anion Modulation for Electrocatalytic Water Oxidation

Advanced Science, Journal Year: 2023, Volume and Issue: 10(29)

Published: Aug. 8, 2023

Abstract The development of efficient and economical electrocatalysts for oxygen evolution reaction (OER) is paramount importance the sustainable production renewable fuels energy storage systems; however, sluggish OER kinetics involving multistep four proton‐coupled electron transfer hampers progress in these systems. Fortunately, surface reconstruction offers promising potential to improve catalyst design. Anion modulation plays a crucial role controlling extent positively persuading reconstructed species' performances. This review starts by providing general explanation how various types anions can trigger dynamic create different combinations with pre‐catalysts. Next, influences anion on manipulating process are discussed based situ advanced characterization techniques. Furthermore, effects survived anionic groups species water oxidation activity further discussed. Finally, challenges prospects future directions redirecting construct highly practical catalysts proposed.

Language: Английский

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An amorphous FeMoO4 nanorod array enabled high-efficiency oxygen evolution electrocatalysis in alkaline seawater

Nano Research, Journal Year: 2023, Volume and Issue: 17(4), P. 2270 - 2275

Published: Aug. 31, 2023

Language: Английский

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