Atomic Layer Deposition of the Metal Pyrites FeS2, CoS2, and NiS2

Guo, Zheng; Wang, Xinwei

doi:10.1002/ange.201803092

Cited by 11 publications

(4 citation statements)

References 43 publications

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“…Platinum-based cathode catalysts are most efficient for the HER because of their high electroactivity and remarkable current density in acidic and alkaline solutions. However, the high cost and rare abundance of noble metals hamper their practical application in the industrial scale. − Until now, various alternatives, such as dichalcogenides of transition metals (WS 2 , MoS 2 , MoSe 2 , WSe 2 ), − pyrites of transition metals (FeS 2 , CoSe 2 ), metal organic frameworks (MOFs), , phosphides of transition metals (CoP, FeP), and carbonaceous materials (carbon nanofibers with Fe–N4, porous carbon with Ni–N x , and many other porous carbon nanosheets) have been demonstrated as efficient catalysts for the HER in acid and alkaline media. − However, the catalytic efficiency and durability still remain unresolved.…”

Section: Introductionmentioning

confidence: 99%

Bioinspired Precious-Metal-Free N4 Macrocycle as an Electrocatalyst for the Hydrogen Evolution Reaction

Hadimane

Aralekallu

Prabhu

et al. 2021

ACS Appl. Energy Mater.

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The design and development of strategies and catalysts are essential for sustainable energy production, particularly for the hydrogen evolution reaction (HER). Precious Pt/C catalyst is known to demonstrate high efficiency in the electrochemical HER and suffers from commercialization issues. Therefore, precious-metal-free and organic-based catalysts are of importance for a future perspective. In this work, cobalt tetra [4-[2-(1H-benzimidazol-2-yl)phenoxy]]phthalocyanine (CoTBImPc) is synthesized for the first time and characterized by physicochemical and electrochemical techniques. 1 H NMR and mass spectral data reveal the successful formation of the ligand and complex, whereas the thermogravimetry (TG) study confirms the thermal stability of the complex up to 400 °C. The electroactivity of CoTBImPc is compared with the hybrid composite of a carbon nanotube (CNT-CoTBImPc) and benchmark Pt/C catalyst for the HER. Linear sweep voltammetry (LSV) shows that an onset potential for the HER for CoTBImPc-CNT/GCE is shifted to a higher potential than that of CoTBImPc/ GCE, suggesting that the HER is more feasible at the surface of CoTBImPc-CNT. Higher activity for CoTBImPc-CNT/GCE in comparison with that of CoTBImPc/GCE in 0.5 M H 2 SO 4 (pH = 0.3) may be ascribed to the enhanced conductivity, a greater number of active sites, and a larger surface area. The hybrid composite yields a current density of −10 mA•cm −2 and demonstrates HER activity at a lower overpotential (63 mV). The benchmark Pt/C catalyst and the as-synthesized pristine phthalocyanine molecule exhibit the HER at overpotentials of 3 and 160 mV, respectively, at a current density of −10 mA•cm −2 . A lower Tafel slope value of 43.2 mV•dec −1 and a higher double-layer capacitance value of 44 mF•cm −2 confirm that the hybrid composite is one of the superior catalyst candidates for the HER compared to the bare glassy carbon electrode (GCE) and pristine metal phthalocyanine. Further, CoTBImPc-CNT/GCE also exhibits an excellent stability during the HER.

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Section: Introductionmentioning

confidence: 99%

Bioinspired Precious-Metal-Free N4 Macrocycle as an Electrocatalyst for the Hydrogen Evolution Reaction

Hadimane

Aralekallu

Prabhu

et al. 2021

ACS Appl. Energy Mater.

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“…Atomic layer deposition (ALD) is one of the effective methods to deposit highquality thin films by self-limiting growth mechanism. [19][20][21] ALD is a saturated selflimiting surface chemistry achieving layer-by-layer growth of target films. It is also capable of producing highly uniform films on a large scale through precise atomic control of film composition and thickness.…”

Section: Introductionmentioning

confidence: 99%

Constructing Conductive MoO_x Thin Films by Plasma‐Enhanced Atomic Layer Deposition

Zhou,

Guan,

Yang

et al. 2024

Adv Eng Mater

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Herein, we construct amorphous molybdenum oxide films by thermal atomic layer deposition (T‐ALD) and plasma enhanced atomic layer deposition (PE‐ALD). The physical and chemical properties of molybdenum oxide films prepared by the two methods were systematically compared by means of film growth law, atomic force microscope and scanning electron microscope etc. The results show that the amorphous molybdenum oxide physical phase prepared by both atomic layer deposition methods is MoO3. Compared with T‐ALD MoO3, the growth rate of MoO3 thin films prepared by PE‐ALD is higher. Compared to PE‐ALD MoO3, the MoO3 films prepared by T‐ALD did not have nucleation delayed to a laminar growth mode, resulting in smoother deposited films and contained less impurity carbon. The MoO3 prepared by PE‐ALD contains 7.4% impurity carbon. This carbon‐doped film significantly improves the conductivity of the MoO3 film and shows good electrochemical activity. As expected, the MoO3 films prepared by PE‐ALD show good electrocatalytic oxygen evolution reaction. The overpotential was only 259 mV at 10 mA cm‐2 and continued to evolution oxygen for 60 h with almost no attenuation, indicating that carbon doping significantly improves the catalytic intrinsic activity and stability of MoO3.This article is protected by copyright. All rights reserved.

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“…Guo et al reported a universal ALD process to deposit pyrite-type metal disulfides (FeS 2 , CoS 2 , and NiS 2 ). [11] The well-crystallized films prepared with optimized ALD recipes could be uniformly deposited even into deep, narrow trenches with high aspect ratios.…”

mentioning

confidence: 99%

Atomic Layer Deposition of Cobalt Phosphide for Efficient Water Splitting

Zhang

Hagen

et al. 2020

Angew Chem Int Ed

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Transition‐metal phosphides (TMP) prepared by atomic layer deposition (ALD) are reported for the first time. Ultrathin Co‐P films were deposited by using PH3 plasma as the phosphorus source and an extra H2 plasma step to remove excess P in the growing films. The optimized ALD process proceeded by self‐limited layer‐by‐layer growth, and the deposited Co‐P films were highly pure and smooth. The Co‐P films deposited via ALD exhibited better electrochemical and photoelectrochemical hydrogen evolution reaction (HER) activities than similar Co‐P films prepared by the traditional post‐phosphorization method. Moreover, the deposition of ultrathin Co‐P films on periodic trenches was demonstrated, which highlights the broad and promising potential application of this ALD process for a conformal coating of TMP films on complex three‐dimensional (3D) architectures.

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Atomic Layer Deposition of the Metal Pyrites FeS₂, CoS₂, and NiS₂

Cited by 11 publications

References 43 publications

Bioinspired Precious-Metal-Free N4 Macrocycle as an Electrocatalyst for the Hydrogen Evolution Reaction

Bioinspired Precious-Metal-Free N4 Macrocycle as an Electrocatalyst for the Hydrogen Evolution Reaction

Constructing Conductive MoO_x Thin Films by Plasma‐Enhanced Atomic Layer Deposition

Atomic Layer Deposition of Cobalt Phosphide for Efficient Water Splitting

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Atomic Layer Deposition of the Metal Pyrites FeS2, CoS2, and NiS2

Cited by 11 publications

References 43 publications

Bioinspired Precious-Metal-Free N4 Macrocycle as an Electrocatalyst for the Hydrogen Evolution Reaction

Bioinspired Precious-Metal-Free N4 Macrocycle as an Electrocatalyst for the Hydrogen Evolution Reaction

Constructing Conductive MoOx Thin Films by Plasma‐Enhanced Atomic Layer Deposition

Atomic Layer Deposition of Cobalt Phosphide for Efficient Water Splitting

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Atomic Layer Deposition of the Metal Pyrites FeS₂, CoS₂, and NiS₂

Constructing Conductive MoO_x Thin Films by Plasma‐Enhanced Atomic Layer Deposition