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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Transition metal-based metal-organic frameworks for oxygen evolution reaction

Coordination Chemistry Reviews, Journal Year: 2020, Volume and Issue: 424, P. 213488 - 213488

Published: Aug. 11, 2020

Language: Английский

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Electrocatalytic Hydrogen Evolution of Ultrathin Co‐Mo₅N₆ Heterojunction with Interfacial Electron Redistribution

Advanced Energy Materials, Journal Year: 2020, Volume and Issue: 10(42)

Published: Sept. 27, 2020

Abstract Modulating nitrogen‐rich nitrides with favorable electron structure to enhance hydrogen production activity is challenging due thermodynamically unfavorable characteristics. Herein, an ultrathin heterojunction of metallic Co and nitride (Co‐Mo 5 N 6 ) prepared through the ammonia annealing process as a robust electrocatalyst for evolution reaction (HER). Density functional theory simulations experiments reveal that obtained Co‐Mo enables redistribution between phase more negative H 2 O adsorption energy, decreasing subsequent energetic barrier dissociation (0.05 eV) optimizing H* absorption (Δ G = 0.1 eV). The connected by nanosheet ( ≈ 1.2 nm) building blocks abundant interstitial spaces, open connective channels, strong capillary forces, which accelerate mass transfer electrical conductivity. exhibits excellent HER extremely low overpotential 19 mV at 10 mA cm −2 Tafel slope 29.0 dec −1 . Notably, required only 280 achieve high current density 1000 better than commercial Pt/C. This work not improves understanding catalytic nitrides, but also presents new strategy design other metal (such W 3 , Ta ).

Language: Английский

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A general approach to the synthesis of transition metal phosphide nanoarrays on MXene nanosheets for pH-universal hydrogen evolution and alkaline overall water splitting

Journal of Materials Chemistry A, Journal Year: 2020, Volume and Issue: 8(28), P. 14234 - 14242

Published: Jan. 1, 2020

Exploring highly efficient, stable, and non-noble-metal bifunctional electrocatalysts for overall water splitting is greatly desired but still remains an ongoing challenge.

Language: Английский

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Interfacial engineering of heterogeneous catalysts for electrocatalysis

Materials Today, Journal Year: 2021, Volume and Issue: 48, P. 115 - 134

Published: March 18, 2021

Language: Английский

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