Stable and Highly Efficient Hydrogen Evolution from Seawater Enabled by an Unsaturated Nickel Surface Nitride

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(13)

Published: Feb. 24, 2021

Abstract Electrocatalytic production of hydrogen from seawater provides a route to low‐cost and clean energy conversion. However, the evolution reaction (HER) using is greatly hindered by lack active stable catalysts. Herein, an unsaturated nickel surface nitride (Ni‐SN@C) catalyst that for HER in alkaline prepared. It achieves low overpotential 23 mV at current density 10 mA cm −2 electrolyte, which superior Pt/C. Compared conventional transition metal nitrides or metal/metal heterostructures, Ni‐SN@C has no detectable bulk phase. Instead, NiN bonding on present. In situ Raman measurements show performs like Pt with ability generate hydronium ions high‐pH electrolyte. The operation then demonstrated two‐electrode electrolyzer system, coupling hydrazine oxidation anode. Using this cell voltage only 0.7 V required achieve 1 A .

Language: Английский

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Self‐Supported Electrocatalysts for Practical Water Electrolysis

Advanced Energy Materials, Journal Year: 2021, Volume and Issue: 11(39)

Published: Sept. 1, 2021

Abstract Over the years, significant advances have been made to boost efficiency of water splitting by carefully designing economic electrocatalysts with augmented conductivity, more accessible active sites, and high intrinsic activity in laboratory test conditions. However, it remains a challenge develop earth‐abundant catalysts that can satisfy demands practical electrolysis, is, outstanding all‐pH electrolyte capacity, direct seawater ability, exceptional performance for overall splitting, superior large‐current‐density activity, robust long‐term durability. In this context, considering features increased species loading, rapid charge, mass transfer, strong affinity between catalytic components substrates, easily‐controlled wettability, as well as, enhanced bifunctional performance, self‐supported are presently projected be most suitable contenders massive scale hydrogen generation. review, comprehensive introduction design fabrication an emphasis on deposited nanostructured catalysts, selection various methods provided. Thereafter, recent development promising applications is reviewed from aforementioned aspects. Finally, brief conclusion delivered challenges perspectives relating promotion sustainable large‐scale production discussed.

Language: Английский

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Direct seawater electrolysis by adjusting the local reaction environment of a catalyst

Nature Energy, Journal Year: 2023, Volume and Issue: unknown

Published: Jan. 30, 2023

Language: Английский

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Nanostructured metal phosphides: from controllable synthesis to sustainable catalysis

Chemical Society Reviews, Journal Year: 2021, Volume and Issue: 50(13), P. 7539 - 7586

Published: Jan. 1, 2021

Metal phosphides (MPs) with unique and desirable physicochemical properties provide promising potential in implementable sustainable catalytic fields including electrocatalysis, photocatalysis, mild thermocatalysis, interdisciplinary hybrid systems.

Language: Английский

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Heterogeneous bimetallic sulfides based seawater electrolysis towards stable industrial-level large current density

Applied Catalysis B Environment and Energy, Journal Year: 2021, Volume and Issue: 291, P. 120071 - 120071

Published: Feb. 27, 2021

Language: Английский

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The rapid self-reconstruction of Fe-modified Ni hydroxysulfide for efficient and stable large-current-density water/seawater oxidation

Energy & Environmental Science, Journal Year: 2022, Volume and Issue: 15(11), P. 4647 - 4658

Published: Jan. 1, 2022

S leaching induces rapid self-reconstruction and the ready formation of Ni 4+ in an Fe–NiSOH electrode, supporting high-efficiency stable alkaline large-current-density water/seawater oxidation.

Language: Английский

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Recent advances in electrocatalysts for seawater splitting

Nano Materials Science, Journal Year: 2020, Volume and Issue: 5(1), P. 101 - 116

Published: Dec. 19, 2020

Water splitting is an effective strategy to produce renewable and sustainable hydrogen energy. Especially, seawater splitting, avoiding use of the limited freshwater resource, more intriguing. Nowadays, electrocatalysts explored for evolution reaction (HER) oxygen (OER) using natural or saline electrolyte have been increasingly reported. To better understand current status challenges HER OER from seawater, we comprehensively review recent advances in splitting. The fundamentals, possible strategies are firstly presented. Then, recently reported that summarized discussed. Finally, perspectives development high-efficient also proposed.

Language: Английский

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Modulating Interfacial Charge Density of NiP₂–FeP₂ via Coupling with Metallic Cu for Accelerating Alkaline Hydrogen Evolution

ACS Energy Letters, Journal Year: 2021, Volume and Issue: 6(2), P. 354 - 363

Published: Jan. 4, 2021

Exploring earth-abundant electrocatalysts with Pt-like performance toward alkaline hydrogen evolution reaction (HER) is extremely desirable for the economy but remains challenging. Herein, density functional theory (DFT) predictions reveal that electronic structure and localized charge at heterointerface of NiP2–FeP2 can be significantly modulated upon coupling metallic Cu, resulting in optimized proton adsorption energy reduced barrier water dissociation, synergistically boosting HER. Motivated by theoretical predictions, we developed a facile strategy to fabricate interface-rich coupled Cu nanowires (CuNW) grown on foam (NiP2–FeP2/CuNW/Cuf). Benefiting from superior intrinsic activity, conductivity, copious active sites, obtained catalyst exhibited exceptional HER activity requiring low overpotential 23.6 mV −10 mA/cm2, surpassing state-of-the-art Pt. Additionally, full electrolyzer required cell voltage 1.42/1.4 V 10 mA/cm2 water/seawater promising stability. This work highlights design principle advanced catalysts beyond.

Language: Английский

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Interfacial Engineering of Ni₃N/Mo₂N Heterojunctions for Urea-Assisted Hydrogen Evolution Reaction

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(7), P. 4091 - 4100

Published: March 9, 2023

The urea oxidation reaction (UOR) is considered as an alternative to the oxygen evolution for high-efficiency hydrogen production. However, molecule relatively complex, containing both electron-donating amino (−NH2) and electron-withdrawing carbonyl (C═O) groups, understanding influence of different functional groups on adsorption behavior conducive rational design preparation high-performance UOR catalysts. Herein, we report a simple synthesis Ni3N/Mo2N heterostructure systematic investigation urea-assisted electrolytic Both temperature-programmed desorption theoretical calculations decipher that −NH2 C═O are more easily adsorbed Ni3N Mo2N, respectively. Meanwhile, could combine enhance advantages individual components, optimizing urea. Besides, this also beneficial improving performance. As expected, in two-electrode water electrolyzer utilizing bifunctional catalysts, production can readily occur at evidently lower voltage (1.36 V@10 mA cm–2), which much than traditional electrolysis, well 7 times higher rate achieved.

Language: Английский

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Seawater electrocatalysis: activity and selectivity

Journal of Materials Chemistry A, Journal Year: 2020, Volume and Issue: 9(1), P. 74 - 86

Published: Nov. 14, 2020

Seawater electrolysis can be considered the solution to global energy demand. The current review discusses recent advancements and limitations related its practical application for providing clean hydrogen gas.

Language: Английский

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