A low-content CeOx dually promoted Ni3Fe@CNT electrocatalyst for overall water splitting

Sun, Mengtao; Zhang, Shuai; Chen, Yang; Guo, Ying; Liu, Yang; Xu, Sailong

doi:10.1039/d3dt00709j

Dalton Trans.

2023

DOI: 10.1039/d3dt00709j

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A low-content CeO_x dually promoted Ni₃Fe@CNT electrocatalyst for overall water splitting

Mengtao Sun

Shuai Zhang

Yang Chen

et al.

Abstract: Rational construction of low-cost and high-performance electrocatalysts for water splitting is crucial to advance the renewable hydrogen fuel. Hybridizing heterojunctions or noble metals is one typical strategy used to boost...

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2024

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Cited by 4 publications

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Robust and Corrosion‐Resistant Overall Water Splitting Electrode Enabled by Additive Manufacturing

Guo,

Lin,

et al. 2024

Small

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Electrolysis of water has emerged as a prominent area of research in recent years. As a promising catalyst support, copper foam is widely investigated for electrolytic water, yet the insufficient mechanical strength and corrosion resistance render it less suitable for harsh working conditions. To exploit high‐performance catalyst supports, various metal supports are comprehensively evaluated, and Ti6Al4V (Ti64) support exhibited outstanding compression and corrosion resistance. With this in mind, a 3D porous Ti64 catalyst support is fabricated using the selective laser sintering (SLM) 3D printing technology, and a conductive layer of nickel (Ni) is coated to increase the electrical conductivity and facilitate the deposition of catalysts. Subsequently, Co0.8Ni0.2(CO3)0.5(OH)·0.11H2O (CoNiCH) nanoneedles are deposited. The resulting porous Ti64/Ni/CoNiCH electrode displayed an impressive performance in the oxygen evolution reaction (OER) and reached 30 mA cm−2 at an overpotential of only 200 mV. Remarkably, even after being compressed at 15.04 MPa, no obvious structural deformation is observed, and the attenuation of its catalytic efficiency is negligible. Based on the computational analysis, the CoNiCH catalyst demonstrated superior catalytic activity at the Ni site in comparison to the Co site. Furthermore, the electrode reached 30 mA cm−2 at 1.75 V in full water splitting conditions and showed no significant performance degradation even after 60 h of continuous operation. This study presents an innovative approach to robust and corrosion‐resistant catalyst design.

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Robust and Corrosion‐Resistant Overall Water Splitting Electrode Enabled by Additive Manufacturing

Guo,

Lin,

et al. 2024

Small

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Interface Engineering of Network‐Like 1D/2D (NHCNT/Ni─MOF) Hybrid Nanoarchitecture for Electrocatalytic Water Splitting

Bhosale,

Murugan,

Kim

et al. 2024

Small Methods

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Here, integrated functional components into a hybrid heterostructure via highly stabilized network‐like interconnected electronic nanoarchitecture of 1D N‐doped holey‐carbon nanotube (NHCNT) with 2D nickel─metal–organic framework (Ni─MOF) nanosheets are developed as high‐performance electrocatalyst for overall water splitting. The NHCNT promoting electron transport pathways in electrocatalyst, and formation of holes in nanotubes further enables excellent diffusion of ions for promoting the overall reaction rate. An excellent combination of 1D/2D structure of NHCNT/Ni─MOF‐4 electrocatalyst exhibits excellent oxygen evolution reaction (η10 = 207.8 mV, and Tafel = 62.6 mV dec−1) and reasonable hydrogen evolution reaction (η10 = 159.8 mV, and Tafel = 107.69 mV dec−1) activity with consistent and stable performance in a 1 m KOH. The highly interconnected network structure contains Ni2+ and Ni3+ species in the NHCNT/Ni─MOF‐4 electrocatalyst, which possesses high specific surface area (SSA) (235.53 m2 g−1), electrochemically active surface area (ECSA) (796.2 cm2), mass activity (4.76 mA mg−1), and turnover frequency (3.99 × 10−2 s−1), which provide remarkable electrocatalytic performance via generating synergy between the NHCNT and Ni─MOF. For overall water splitting, NHCNT/Ni─MOF‐4 attains a low cell voltage (1.77 V@10 mA cm−2).

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Study on effect of surface engineering by In doped CeCu2O4 for enhanced super capacitive properties as energy storage solution

Ahmad,

Shah,

Naz

et al. 2024

Journal of Energy Storage

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A low-content CeO_x dually promoted Ni₃Fe@CNT electrocatalyst for overall water splitting

Abstract: Rational construction of low-cost and high-performance electrocatalysts for water splitting is crucial to advance the renewable hydrogen fuel. Hybridizing heterojunctions or noble metals is one typical strategy used to boost...

Cited by 4 publications

References 35 publications

Robust and Corrosion‐Resistant Overall Water Splitting Electrode Enabled by Additive Manufacturing

Robust and Corrosion‐Resistant Overall Water Splitting Electrode Enabled by Additive Manufacturing

Interface Engineering of Network‐Like 1D/2D (NHCNT/Ni─MOF) Hybrid Nanoarchitecture for Electrocatalytic Water Splitting

Study on effect of surface engineering by In doped CeCu2O4 for enhanced super capacitive properties as energy storage solution

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