Low temperature plasma-assisted synthesis and modification of water splitting electrocatalysts

Qin, Chu; Tian, Shijun; Jiang, Zengjie; Maiyalagan, T.; Jiang, Zhongqing

doi:10.1016/j.electacta.2023.142179

Cited by 10 publications

(3 citation statements)

References 196 publications

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“…According to Figure 3d, N1s peak positions and intensities were consistent across all samples, suggesting that their electrochemical contributions and chemical state might be equivalent. The benefit of the N-plasma source is that it can generate vacancy oxygen to enhance electrochemical properties and produce nitrogen as a N-doped building [26]. Despite an increase in the abundance of oxygen vacancies with increasing time, an optimal time of 90 s was identified for maintaining the catalyst's structure and electronic configuration to achieve the best activity.…”

Section: Structural Characterizationsmentioning

confidence: 99%

“…PBA template materials can produce catalysts with a large surface area that can improve the OER. Two post processes have been found to play essential roles in enhancing the electrocatalytic efficiency by generating more surface oxygen vacancies and N-doping effects [25,26]. Moreover, direct growth of the PBA sample on NF does not need any polymer binders, which could improve the conductivity and stability of prepared samples in OERs under alkaline environments.…”

Section: Introductionmentioning

confidence: 99%

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Plasma-Induced Oxygen Vacancies in N-Doped Hollow NiCoPBA Nanocages Derived from Prussian Blue Analogue for Efficient OER in Alkaline Media

Lee

Yun

et al. 2023

IJMS

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Although water splitting is a promising method to produce clean hydrogen energy, it requires efficient and low-cost catalysts for the oxygen evolution reaction (OER). This study focused on plasma treatment’s significance of surface oxygen vacancies in improving OER electrocatalytic activity. For this, we directly grew hollow NiCoPBA nanocages using a Prussian blue analogue (PBA) on nickel foam (NF). The material was treated with N plasma, followed by a thermal reduction process for inducing oxygen vacancies and N doping on the structure of NiCoPBA. These oxygen defects were found to play an essential role as a catalyst center for the OER in enhancing the charge transfer efficiency of NiCoPBA. The N-doped hollow NiCoPBA/NF showed excellent OER performance in an alkaline medium, with a low overpotential of 289 mV at 10 mA cm−2 and a high stability for 24 h. The catalyst also outperformed a commercial RuO2 (350 mV). We believe that using plasma-induced oxygen vacancies with simultaneous N doping will provide a novel insight into the design of low-priced NiCoPBA electrocatalysts.

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Section: Structural Characterizationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Plasma-Induced Oxygen Vacancies in N-Doped Hollow NiCoPBA Nanocages Derived from Prussian Blue Analogue for Efficient OER in Alkaline Media

Lee

Yun

et al. 2023

IJMS

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“…This is largely due to the sluggish kinetics of the overall electrolysis. Recently, notable innovative noble-metal-based (Pt/C, IrO 2 , and RuO 2 ) materials have been investigated as efficient electrocatalysts [10][11][12]. However, their scarcity, high material cost, and persistent lack of durability in alkaline conditions make them unsuitable for widespread commercial applications [13].…”

Section: Introductionmentioning

confidence: 99%

Iron-Doped Nickel Hydroxide Nanosheets as Efficient Electrocatalysts in Electrochemical Water Splitting

et al. 2023

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The development of non-noble-metal-based electrocatalysts for water electrolysis is essential to produce sustainable green hydrogen. Highly active and stable non-noble-metal-based electrocatalysts are greatly needed for the replacement of the benchmark electrocatalysts of iridium, ruthenium, and platinum oxides. Herein, we synthesized non-noble-metal-based, Fe-doped, β-Ni(OH)2 interconnected hierarchical nanosheets on nickel foam via a conventional hydrothermal reaction. Iron doping significantly modified the electronic structure of β-Ni(OH)2 due to the electron transfer of iron to nickel hydroxide. Fe-doped β-Ni(OH)2 was investigated both as a cathode and anode electrode for hydrogen and oxygen evolution reactions (OERs and HERs). It facilitated significant improvements in electrochemical performance due to its huge intrinsic active sites and high electrical conductivity. As a result, the electrocatalytic activity of Fe-doped Ni(OH)2 exhibited a lesser overpotential of 189 and 112 mV at a current density of 10 mA cm−2 and a Tafel slope of 85 and 89 mV dec−1 for the OER and HER, respectively. The Fe-doped β-Ni(OH)2 displayed excellent durability for 48 h and a cell voltage of 1.61 V @ 10 mA cm−2. This work demonstrates that Fe-doped β-Ni(OH)2 is an efficient electrocatalyst with superior electrocatalytic performance towards overall water splitting that can be useful at the industrial scale.

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Ar/NH₃ Radio‐Frequency Plasma Etching and N‐doping to Stabilize Metallic Phase 1T‐MoS₂ for Fast and Durable Sodium‐Ion Storage

Tian,

Chen,

Wang

et al. 2024

Adv Funct Materials

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Metallic phase 1T‐MoS2 is considered a prospective anode material for sodium‐ion batteries (SIBs) due to its remarkable electrical conductivity and unique layered structure. However, 1T‐MoS2 is thermodynamically unstable and prone to phase transition to the 2H‐MoS2 phase. Herein, self‐supporting nitrogen‐doped and carbon‐coated 1T/2H mixed‐phase MoS2 nanosheets with rich sulfur vacancies on carbon cloth (C@N‐MoS2‐p/CC) are synthesized through a hydrothermal method and Ar/NH3 radio‐frequency (RF) plasma treatment process. Density‐functional‐theory (DFT) calculations demonstrate that after Ar/NH3 RF plasma treatment, nitrogen‐doping and etching effects are realized, which combine with carbon‐coating significantly reduce the phase transition energy of 1T‐MoS2, thus triggering the phase transition and enabling the stable existence of the highly active 1T‐MoS2. As a result, the C@N‐MoS2‐p/CC exhibits outstanding sodium storage performance, with initial charge–discharge capacities of 701.0/797.0 mAh g−1 at 1 A g−1, respectively. It also demonstrates exceptional rate capabilities and ultra‐high cyclic stability, maintaining a discharge capacity of 404.2 mAh g−1 after 910 cycles at a high rate of 2 A g−1. In a full cell with Na3V2(PO4)3/CC cathode, it exhibits excellent initial charge–discharge capacities of 102.3/102.9 mAh g−1 and maintains satisfactory cycling stability after 350 cycles (86.7 mAh g−1) at 0.1 C.

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Low temperature plasma-assisted synthesis and modification of water splitting electrocatalysts

Cited by 10 publications

References 196 publications

Plasma-Induced Oxygen Vacancies in N-Doped Hollow NiCoPBA Nanocages Derived from Prussian Blue Analogue for Efficient OER in Alkaline Media

Plasma-Induced Oxygen Vacancies in N-Doped Hollow NiCoPBA Nanocages Derived from Prussian Blue Analogue for Efficient OER in Alkaline Media

Iron-Doped Nickel Hydroxide Nanosheets as Efficient Electrocatalysts in Electrochemical Water Splitting

Ar/NH₃ Radio‐Frequency Plasma Etching and N‐doping to Stabilize Metallic Phase 1T‐MoS₂ for Fast and Durable Sodium‐Ion Storage

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Low temperature plasma-assisted synthesis and modification of water splitting electrocatalysts

Cited by 10 publications

References 196 publications

Plasma-Induced Oxygen Vacancies in N-Doped Hollow NiCoPBA Nanocages Derived from Prussian Blue Analogue for Efficient OER in Alkaline Media

Plasma-Induced Oxygen Vacancies in N-Doped Hollow NiCoPBA Nanocages Derived from Prussian Blue Analogue for Efficient OER in Alkaline Media

Iron-Doped Nickel Hydroxide Nanosheets as Efficient Electrocatalysts in Electrochemical Water Splitting

Ar/NH3 Radio‐Frequency Plasma Etching and N‐doping to Stabilize Metallic Phase 1T‐MoS2 for Fast and Durable Sodium‐Ion Storage

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Ar/NH₃ Radio‐Frequency Plasma Etching and N‐doping to Stabilize Metallic Phase 1T‐MoS₂ for Fast and Durable Sodium‐Ion Storage