Wafer-scale transferable molybdenum disulfide thin-film catalysts for photoelectrochemical hydrogen production

Kwon, Ki Chang; Choi, Seokhoon; Hong, Kootak; Moon, Cheon Woo; Shim, Young Seok; Kim, Do Hong; Kim, Taemin; Sohn, Woonbae; Jeon, Jong-June; Lee, Chul‐Ho; Nam, Ki Tae; Han, Seungwu; Kim, Soo Young; Jang, Ho Won

doi:10.1039/c6ee00144k

Cited by 184 publications

(153 citation statements)

References 47 publications

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“…[11] Water splitting over other films such as CdTe [47] and CuO/CdS heterojunction [48] thin films hasb een performed to exhibit about 10 mmol h À1 and < 1 mmol h À1 ,r e- www.chemnanomat.org spectively,u nder simulated solar light irradiation in PEC system.T he hydrogen evaluation rates presented here are beyondt hose of expensive wafer-based materials and nanoparticle-based photocatalysts. [49] Based on this observation, schematic diagrams for the band alignment for the two conditions of Aa nd B( indicated in Figure 5) are proposed in Figure 6. Without appliedb ias between SnS and Pt, all the E F sa re aligned with each other at equilibrium.…”

Section: Resultsmentioning

confidence: 97%

Facile Formation of Nanodisk‐Shaped Orthorhombic SnS Layers from SnS₂ Particles for Photoelectrocatalytic Hydrogen Production

Patel

Kim

et al. 2017

ChemNanoMat

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SnS has a great potential for use as a photocatalyst for the production of chemical fuels out of sunlight. For the use of it as a photocatalyst, a fast and reliable method of fabricating pure layered crystalline SnS is required. Here, we present a simple and efficient method of fabricating high‐quality SnS layers as a thin film on various substrates such as Si, quartz, glass and FTO. The nanodisk‐shaped p‐type SnS films are obtained starting from SnS2 via a one‐step process involving phase dissociation and sulfur reduction. The prepared SnS films show interesting thickness‐dependent physical properties such as optical band gap, absorption coefficient and flat band potential, which suggest the possibility of tuning its property by controlling the thickness. Especially, the SnS films with the thickness of 20 nm or less show an enhanced absorption above the band gap and an increased free carrier concentration. With such advantageous photoresponsive properties, we observed a good hydrogen production activity (order of 100 μmol h−1 cm−2) from the thin SnS films under photoelectrocatalytic reaction conditions. The measured efficiency in hydrogen evolution is explained from a favorable band alignment as well as the good photoresponse of the film. Combined with the facile fabrication of high‐quality thin SnS films, our analysis shows that nanodisk‐shaped SnS is a promising material for a future development of photocatalytic production of hydrogen as a chemical fuel.

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Section: Resultsmentioning

confidence: 97%

Facile Formation of Nanodisk‐Shaped Orthorhombic SnS Layers from SnS₂ Particles for Photoelectrocatalytic Hydrogen Production

Patel

Kim

et al. 2017

ChemNanoMat

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“…[ 157 ] Kwon et al have improved the HER catalytic performance of MoS 2 through the formation of n‐TMD/p‐TMD heterojunctions to use the high electric fields in the p–n junction. [ 158 ] Although the fabrication of these materials is not simple enough, the concept of the adhesion energy and charge injection can be well employed in building the hybrid structure that we have discussed above.…”

Section: Progress On Strategies To Improve the Her Catalytic Activitymentioning

confidence: 99%

“…Another powerful aspect of TMD catalysis that can be used in complement to the techniques we have discussed is the fabrication of chemically functionalized TMDs, these functionalities can include noble metals as we have discussed above, and also the metal organic frameworks, layered perovskites, hybrid structures or organic group functionalization. [ 156–158,192–196 ] This is an emerging a powerful field as it opens a whole new set of possibilities to active the catalytically active sites of TMDs and add catalytic activity, via the functional moiety, to inactive sites on the pristine TMD for both acidic and alkaline HER. Since heterostructuring is hugely flexible owing to van der Waals stacking, unique electronic band structures (e.g., tune the Δ G H* and enable improved charge injection between interfaces) can be fabricated and tested in an extremely simple and controllable manner.…”

Section: Conclusion and Prospectmentioning

confidence: 99%

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Engineered 2D Transition Metal Dichalcogenides—A Vision of Viable Hydrogen Evolution Reaction Catalysis

Lin

Sherrell

Liu

et al. 2020

Advanced Energy Materials

213

174

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Tackling global climate change and the energy crisis requires novel approaches in clean energy generation and efficient manufacturing. [1] Hydrogen (H 2 ) is one of the most popular clean energy sources, providing the highest energy outputThe hydrogen evolution reaction (HER) is an emerging key technology to provide clean, renewable energy. Current state-of-the-art catalysts still rely on expensive and rare noble metals, however, the relatively cheap and abundant transition metal dichalcogenides (TMDs) have emerged as exceptionally promising alternatives. Early studies in developing TMD-based catalysts laid the groundwork in understanding the fundamental catalytically active sites of different TMD phases, enabling a toolbox of physical, chemical, and electronic engineering strategies to improve the HER catalytic activity of TMDs. This report focuses on recent progress in improving the catalytic properties of TMDs toward highly efficient production of H 2 . Combining theoretical and experimental considerations, a summary of the progress to date is provided and a pathway forward for viable hydrogen evolution from TMD driven catalysis is concluded.

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“…[1][2][3][4][5][6][7][8] Because they suffer from inferior charge transport and broad band gap energies, photoanodes have low efficiency compared to that of photocathodes. Therefore, it is crucial to develop an efficient and practical anode system for the construction of high-performance PEC cells.…”

Section: Introductionmentioning

confidence: 99%

Full Parametric Impedance Analysis of Photoelectrochemical Cells: Case of a TiO2 Photoanode

Nguyen¹,

Tran²,

Nguyen³

et al. 2018

J. Korean Ceram. Soc

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Ferric oxide (α-Fe 2 O 3 , hematite) is an n-type semiconductor; due to its narrow band gap (E g = 2.1 eV), it is a highly attractive and desirable material for use in solar hydrogenation by water oxidation. However, the actual conversion efficiency achieved with Fe 2 O 3 is considerably lower than the theoretical values because the considerably short diffusion length (2-4 nm) of holes in Fe 2 O 3 induces excessive charge recombination and low absorption. This is a significant hurdle that must be overcome in order to obtain high solar-to-hydrogen conversion efficiency. In consideration of this, it is thought that elemental doping, which may make it possible to enhance the charge transfer at the interface, will have a marked effect in terms of improving the photoactivities of α-Fe 2 O 3 photoanodes. Herein, we report on the synthesis by pulsed electrodeposition of α-Fe 2 O 3 -based anodes; we also report on the resulting photoelectrochemical (PEC) properties. We attempted Ti-doping to enhance the PEC properties of α-Fe 2 O 3 anodes. It is revealed that the photocurrent density of a bare α-Fe 2 O 3 anode can be dramatically changed by controlling the condition of the electrodeposition and the concentration of TiCl 3 . Under optimum conditions, a modified α-Fe 2 O 3 anode exhibits a maximum photocurrent density of 0.4 mA/cm 2 at 1.23 V vs. reversible hydrogen electrode (RHE) under 1.5 G simulated sunlight illumination;this photocurrent density value is about 3 times greater than that of unmodified α-Fe 2 O 3 anodes.

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Wafer-scale transferable molybdenum disulfide thin-film catalysts for photoelectrochemical hydrogen production

Abstract: Wafer-scale n-MoS2/p-Si photocathodes with high hydrogen evolution reaction activities are demonstrated.

Cited by 184 publications

References 47 publications

Facile Formation of Nanodisk‐Shaped Orthorhombic SnS Layers from SnS₂ Particles for Photoelectrocatalytic Hydrogen Production

Facile Formation of Nanodisk‐Shaped Orthorhombic SnS Layers from SnS₂ Particles for Photoelectrocatalytic Hydrogen Production

Engineered 2D Transition Metal Dichalcogenides—A Vision of Viable Hydrogen Evolution Reaction Catalysis

Full Parametric Impedance Analysis of Photoelectrochemical Cells: Case of a TiO2 Photoanode

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Wafer-scale transferable molybdenum disulfide thin-film catalysts for photoelectrochemical hydrogen production

Abstract: Wafer-scale n-MoS2/p-Si photocathodes with high hydrogen evolution reaction activities are demonstrated.

Cited by 184 publications

References 47 publications

Facile Formation of Nanodisk‐Shaped Orthorhombic SnS Layers from SnS2 Particles for Photoelectrocatalytic Hydrogen Production

Facile Formation of Nanodisk‐Shaped Orthorhombic SnS Layers from SnS2 Particles for Photoelectrocatalytic Hydrogen Production

Engineered 2D Transition Metal Dichalcogenides—A Vision of Viable Hydrogen Evolution Reaction Catalysis

Full Parametric Impedance Analysis of Photoelectrochemical Cells: Case of a TiO2 Photoanode

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Facile Formation of Nanodisk‐Shaped Orthorhombic SnS Layers from SnS₂ Particles for Photoelectrocatalytic Hydrogen Production

Facile Formation of Nanodisk‐Shaped Orthorhombic SnS Layers from SnS₂ Particles for Photoelectrocatalytic Hydrogen Production