Pulsed laser ablation and deposition of ZnS:Cr

Nematollahi, Mohammadreza; Yang, Xiaodong; Gibson, Ursula J.; Reenaas, Turid Worren

doi:10.1016/j.tsf.2015.07.046

Cited by 13 publications

(7 citation statements)

References 18 publications

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“…Pulsed laser ablation (PLA) in liquid, a technique that emits photonic energy, has also been adopted by some researchers to prepare NPs with unique morphology and chemical compositions. [ 66 ] In a typical PLA setup, Feng et al employed a 20‐min nanosecond pulsed Nd:YAG laser with 10 Hz and 300 mJ to the metal targets of Cu, Zn, and CuZn alloy with different Cu:Zn ratios. [ 67 ] Homogeneous CuZnO NPs were reduced to the CuZn state via electroreduction and used as the catalyst for selective CO 2 RR.…”

Section: Synthesis Of Cu‐based Catalystsmentioning

confidence: 99%

Potential Link between Cu Surface and Selective CO₂ Electroreduction: Perspective on Future Electrocatalyst Designs

et al. 2020

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Electrochemical reduction of carbon dioxide (CO2RR) product distribution has been identified to be dependent on various surface factors, including the Cu facet, morphology, chemical states, doping, etc., which can alter the binding strength of key intermediates such as *CO and *OCCO during reduction. Therefore, in‐depth knowledge of the Cu catalyst surface and identification of the active species under reaction conditions aid in designing efficient Cu‐based electrocatalysts. This progress report categorizes various Cu‐based electrocatalysts into four main groups, namely metallic Cu, Cu alloys, Cu compounds (Cu + non‐metal), and supported Cu‐based catalysts (Cu supported by carbon, metal oxides, or polymers). The detailed mechanisms for the selective CO2RR are presented, followed by recent relevant developments on the synthetic procedures for preparing Cu and Cu‐based nanoparticles. Herein, the potential link between the Cu surface and CO2RR performance is highlighted, especially in terms of the chemical states, but other significant factors such as defective sites and roughened morphology of catalysts are equally considered during the discussion of current studies of CO2RR with Cu‐based electrocatalysts to fully understand the origin of the significant enhancement toward C2 formation. This report concludes by providing suggestions for future designs of highly selective and stable Cu‐based electrocatalysts for CO2RR.

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Section: Synthesis Of Cu‐based Catalystsmentioning

confidence: 99%

Potential Link between Cu Surface and Selective CO₂ Electroreduction: Perspective on Future Electrocatalyst Designs

et al. 2020

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“…[27], the Cr/Zn ratio in the depositing flux is dependent on the ablation parameters, such as laser fluence, and the target surface morphology.…”

Section: Film Compositionmentioning

confidence: 99%

Molecular beam and pulsed laser deposition of ZnS:Cr for intermediate band solar cells

Nematollahi

Yang

Sandvik

et al. 2015

Solar Energy Materials and Solar Cells

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We present the properties of Cr-doped zinc sulfide (ZnS:Cr) films deposited on Si(100) by pulsed laser deposition (PLD). The films are studied for solar cell application, and to have a high absorption a high Cr content (2.0-5.0 at.%) was intended. It is determined by energy-dispersive X-ray spectroscopy that Cr is relatively uniformely distributed, and Cr increase corresponds to Zn decrease.The results indicate that most Cr atoms substitute Zn sites. Consistently, electron energy loss and X-ray photoelectron spectroscopy (XPS) showed that the films contain mainly Cr increasing Cr content, and at a given Cr content, increases with increasing growth temperature.

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“…Although the synthetic formulation of composites of cobalt sulfides is incorporated with metal hydroxides, sulfides, and pure metallic sites using chemical methods, they resulted in the difficulty in nucleation and growth of the catalyst surface. Purely physical methods such as laser ablation can be used to achieve control over surface layers that will be resulting in enriched activities with new insights into the catalytic activity of the materials toward water splitting. , …”

Section: Introductionmentioning

confidence: 99%

“…The electrodeposited thin films of Co 7 Se 8 developed by Masud et al showed that to achieve a current density of 10 mA cm –2 , an overpotential of only 260 mV is required . Preparing thin films by the pulsed laser deposition (PLD) technique (bottom up approach) is a purely physical method that offers wide advantages in terms of forming few layers, increased activity, and stability with minimal loading. , Previously, cobalt oxide thin films were prepared and analyzed for electrocatalytic water oxidation with low loading (0.074 mg cm –2 ) and increased stability, while our group reported that the electrocatalytic activity of Co 3 O 4 thin films was found to vary with the oxygen partial pressure (pO 2 ) from 10 –6 to 10 –2 while deposition. In one of the works, Pt thin films were made with an effective thickness (continuous film approximation) of around 0.09–3.47 nm and the loading was approximately 0.18–7.44 μg cm –2 , which was applied in polymer electrolyte membrane fuel cells.…”

Section: Introductionmentioning

confidence: 99%

“…Purely physical methods such as laser ablation can be used to achieve control over surface layers that will be resulting in enriched activities with new insights into the catalytic activity of the materials toward water splitting. 42,43 Recently, thin-film-based catalysts have attracted researchers with their pioneering advantages particularly in electrocatalytic water splitting. In a work by Babar et al, a spray coating technique was used to explore the formation of transparent thin-film nickel oxide nanoflakes as a catalyst for OER.…”

Section: ■ Introductionmentioning

confidence: 99%

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In Situ Decorated Ni Metallic Layer with CoS₂-Layered Thin Films via a Layer-by-Layer Strategy Using Pulsed Laser Deposition for Enhanced Electrocatalytic OER

et al. 2021

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The catalytic activity of 3d-transition-metal-based electrocatalysts has exhibited considerable enhancements in electrocatalytic water splitting via pioneering modulations in the active sites. To overcome the energy loss because of the mechanic steps involved in a complex oxygen evolution reaction (OER), the electrode surface with only a few layers would be an advantage over multilayers for the ease of the electrolyte interaction and gas evolution. Here, for the first time, thin films of CoS2 are prepared on a carbon cloth via a pulsed laser deposition (PLD) technique via layer-by-layer deposition of Ni that tend to give Ni–CoS2 thin films. Based on varying the ablation of metallic Ni followed by CoS2 as a layer-by-layer assembly using PLD, three catalysts, namely, Ni5–CoS2, Ni10–CoS2, and Ni15–CoS2, were prepared. In OER, to achieve a benchmarking current density of 10 mA cm–2 in 1 M KOH, Ni10–CoS2 required a lesser overpotential of 304 mV, whereas others, namely, Ni5–CoS2, Ni15–CoS2, and CoS2, required overpotentials of 328, 336, and 373 mV, respectively, to attain the same current density. The charge transfer kinetics associated with all of the catalysts were analyzed, and the corresponding Tafel slope values for Ni5–CoS2 and Ni10–CoS2 were 75 and 98 mV/dec, respectively, ensuring the facile transfer of electrons at the interface. The assistance of metallic Ni sites also ensured stability for long-term applications. These findings will give a way for other earth-abundant catalysts for the increased electrocatalytic activity toward energy needs in future.

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Pulsed laser ablation and deposition of ZnS:Cr

Cited by 13 publications

References 18 publications

Potential Link between Cu Surface and Selective CO₂ Electroreduction: Perspective on Future Electrocatalyst Designs

Potential Link between Cu Surface and Selective CO₂ Electroreduction: Perspective on Future Electrocatalyst Designs

Molecular beam and pulsed laser deposition of ZnS:Cr for intermediate band solar cells

In Situ Decorated Ni Metallic Layer with CoS₂-Layered Thin Films via a Layer-by-Layer Strategy Using Pulsed Laser Deposition for Enhanced Electrocatalytic OER

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Pulsed laser ablation and deposition of ZnS:Cr

Cited by 13 publications

References 18 publications

Potential Link between Cu Surface and Selective CO2 Electroreduction: Perspective on Future Electrocatalyst Designs

Potential Link between Cu Surface and Selective CO2 Electroreduction: Perspective on Future Electrocatalyst Designs

Molecular beam and pulsed laser deposition of ZnS:Cr for intermediate band solar cells

In Situ Decorated Ni Metallic Layer with CoS2-Layered Thin Films via a Layer-by-Layer Strategy Using Pulsed Laser Deposition for Enhanced Electrocatalytic OER

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Potential Link between Cu Surface and Selective CO₂ Electroreduction: Perspective on Future Electrocatalyst Designs

Potential Link between Cu Surface and Selective CO₂ Electroreduction: Perspective on Future Electrocatalyst Designs

In Situ Decorated Ni Metallic Layer with CoS₂-Layered Thin Films via a Layer-by-Layer Strategy Using Pulsed Laser Deposition for Enhanced Electrocatalytic OER