Boron‐Doped Ti₃C₂T_x MXene for Effective and Durable High‐Current‐Density Ammonia Synthesis

Small, Journal Year: 2024, Volume and Issue: 20(45)

Published: July 24, 2024

Abstract Ammonia (NH 3 ) synthesis via the nitrate reduction reaction (NO RR) offers a competitive strategy for nitrogen cycling and carbon neutrality; however, this is hindered by poor NO RR performance under high current density. Herein, it shown that boron‐doped Ti C 2 T x MXene nanosheets can highly efficiently catalyze conversion of RR‐to‐NH at ambient conditions, showing maximal NH Faradic efficiency 91% with peak yield rate 26.2 mgh −1 mg cat. , robust durability over ten consecutive cycles, all them are comparable to best‐reported results exceed those pristine MXene. More importantly, when tested in flow cell, designed catalyst delivers density ‒1000 mA cm −2 low potential ‒1.18 V versus reversible hydrogen electrode maintains selectivity wide range. Besides, Zn–nitrate battery as cathode assembled, which achieves power 5.24 mW 1.15 . Theoretical simulations further demonstrate boron dopants optimize adsorption activation intermediates, reduce potential‐determining step barrier, thus leading an enhanced selectivity.

Language: Английский

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Nickel Nanoparticles Protruding from Molybdenum Carbide Micropillars with Carbon Layer-Protected Biphasic 0D/1D Heterostructures for Efficient Water Splitting

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(2), P. 2330 - 2340

Published: Jan. 2, 2024

It remains a tremendous challenge to achieve high-efficiency bifunctional electrocatalysts for both the hydrogen evolution reaction (HER) and oxygen (OER) production by water splitting. Herein, novel hybrid of 0D nickel nanoparticles dispersed on one-dimensional (1D) molybdenum carbide micropillars embedded in carbon layers (Ni/Mo2C@C) was successfully prepared foam facile pyrolysis strategy. During synthesis process, were simultaneously generated under H2 C2H2 mixed atmospheres conformally encapsulated layers. Benefiting from distinctive 0D/1D heterostructure synergistic effect biphasic Mo2C Ni together with protective layer, reduced activation energy barriers fast catalytic kinetics can be achieved, resulting small overpotential 96 mV HER 266 OER at current density 10 mA cm–2 excellent durability 1.0 M KOH electrolyte. In addition, using developed Ni/Mo2C@C as cathode anode, constructed electrolyzer exhibits voltage 1.55 V overall The designed may give inspiration development efficient catalysts low-cost transition metal elements

Language: Английский

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Construction of rod-like cobalt-pyridinedicarboxylic acid/MXene nanosheets composites for hydrogen evolution reaction and supercapacitor

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 661, P. 139 - 149

Published: Jan. 24, 2024

Language: Английский

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Synthesis and electrochemical properties of Mo4/3B2Tx MBene as an anode material for lithium-ion batteries

Journal of Applied Electrochemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 19, 2025

Language: Английский

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MXene-based materials: Synthesis, structure and their application for advanced lithium-sulfur batteries

Journal of Energy Storage, Journal Year: 2023, Volume and Issue: 75, P. 109555 - 109555

Published: Nov. 16, 2023

Language: Английский

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