Synergistic effects of dual-doping with Ce and Zr in CoP nanoneedle for highly-efficiency hydrogen evolution reaction and overall water splitting at high current density

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 180155 - 180155

Published: April 1, 2025

Language: Английский

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Recent trends and prospects in electrochemical nitrate reduction to ammonia with an emphasis on cobalt catalysts

Coordination Chemistry Reviews, Journal Year: 2025, Volume and Issue: 539, P. 216751 - 216751

Published: April 28, 2025

Language: Английский

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Ultrafast Reconstruction of Ni‐Based Alloy Precatalyst for Robust Seawater Oxidation

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

Published: May 19, 2025

Abstract NiOOH, typically generated through prolonged electrochemical reconstruction of precatalysts such as Ni‐based compounds, is highly active for seawater oxidation but suffers from limited durability. In this study, NiMo alloy precatalyst designed to rapidly reconstruct into NiOOH at industrial current densities with exceptional During anodic polarization, Mo in the as‐produced undergoes dealloying, creating a favorable microenvironment that accelerates conversion Ni within just two cyclic voltammetry cycles. Residual tunes electronic configuration enhancing its activity, while leached oxidized and forms MoO 4 2− , repelling corrosive Cl − sites. The reconstructed catalyst achieves density 500 mA cm −2 an overpotential 288 mV up 1000 h 1.0 m KOH alkalized seawater. When integrated anion exchange membrane electrolyzer, it delivers cell voltage only 1.78 V, power consumption 4.25 kWh −3 . obtained results demonstrate significant potential developed practical applications green hydrogen production

Language: Английский

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High entropy hydroxide with hollow nanocage structure promotes efficient and stable water/seawater electro-oxidation

Chemical Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

High-entropy hydroxides (HEHs) exhibit excellent performance in electrocatalytic reactions, but controlling the synthesis of HEHs with a high specific surface area and rapid mass transfer kinetics is challenging. Herein, series hollow nanocage HEH catalysts decorated nanosheet arrays were successfully synthesized by "coordinated etching precipitation" method. The rich edge structure not only promotes electrochemical transfer, also has exposed active sites, which combined entropy effect enhances performance. Theoretical calculations further confirm that FeCoNiCuCrMn-OH catalyst stronger adsorption capacity for OH- than Cl-, can jointly improve catalytic activity corrosion resistance effectively reducing oxygen evolution reaction energy barrier enhancing to Cl-. In alkaline seawater electrolytes, 275 292 mV overpotentials are needed reach 100 200 mA cm-2. addition, it stability resistance, work stably more 400 hours when operating at This study provides new ideas morphology control composition high-efficiency electrocatalysts.

Language: Английский

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Electron redistribution induced by p–d orbital hybridization in Co₂P/FeP nanosheets boosts water electrooxidation

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Co 2 P/FeP nanosheets prepared by an aerogel-assisted method showed high OER activity in alkaline media thanks to their 2D structure and Co–P/Fe–P charge bridges enhancing electronic interactions.

Language: Английский

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