Induction of a piezo-potential improves photocatalytic hydrogen production over ZnO/ZnS/MoS2 Heterostructures

Lee, Guan-Chi; Lyu, Lian‐Ming; Hsiao, Kai‐Yuan; Huang, Yu‐Sheng; Perng, Tsong‐Pyng; Lu, Ming-Yen; Chen, Lih‐Juann

doi:10.1016/j.nanoen.2021.106867

Cited by 58 publications

(23 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The blue shifts after Zn doping are ascribed to the formation of ZnS, of which the bandgap is larger than that of SnS with a value of 3.68 eV. 53…”

Section: Resultsmentioning

confidence: 97%

“…The blue shifts after Zn doping are ascribed to the formation of ZnS, of which the bandgap is larger than that of SnS with a value of 3.68 eV. 53 Mott-Schottky (M-S) measurements were used to assess the flat-band potential of the thin film electrodes fabricated from all SnS samples, by drawing a plot with 1/C 2 (capacitance) versus V (voltage). By extending the longest straight part of the curve to zero of the vertical coordinate, the flat-band potentials are shown in Fig.…”

Section: Optical and Electronic Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Zn-doped SnS with sulfur vacancies for enhanced photocatalytic hydrogen evolution from water

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The blue shifts after Zn doping are ascribed to the formation of ZnS, of which the bandgap is larger than that of SnS with a value of 3.68 eV. 53…”

Section: Resultsmentioning

confidence: 97%

Section: Optical and Electronic Propertiesmentioning

confidence: 99%

Zn-doped SnS with sulfur vacancies for enhanced photocatalytic hydrogen evolution from water

et al. 2022

View full text Add to dashboard Cite

show abstract

“…In the comparison between HCNs and HCNs@HD-CoNi-LDH, we found that in the composite material, sound waves were transmitted to HCNs through HD-CoNi-LDH, and the double-layer hollow material had the highest sound wave energy; this was attributed to the ability of the outer HD-CoNi-LDH nanosheets to absorb the sound waves when they were transmitted (similar to a honeycomb porous material). [35][36][37] The sound waves were then transmitted to the HCNs for multiple reections. A photocatalytic cycling test was performed (Fig.…”

Section: Analysis Of Sono-photocatalytic Activitymentioning

confidence: 99%

CdS nanocages@defective-CoNi-LDH with bilayer porous hollow frameworks toward optimized sono-photocatalytic performance

Fang

Xing

et al. 2022

J. Mater. Chem. A

View full text Add to dashboard Cite

show abstract

“…What's more, ZnO as the hydrogen evolution site interacts rather strongly with water molecules and prefers the water molecular adsorption (the water-binding energy at ZnO surface is about 0.8 eV), [28,38] which is also widely reported as the hydrogen evolution active site. [28,38,39] The mechanism of the weakened photocorrosion and hydrogen evolution mechanism is illustrated in Figure S7 (Supporting Information).…”

Section: Photoelectrochemical Analysismentioning

confidence: 99%

Design and In Situ Growth of Cu₂O‐Blended Heterojunction Directed by Energy‐Band Engineering: Toward High Photoelectrochemical Performance

Zheng

Diao

Zhang

et al. 2022

Adv Materials Inter

View full text Add to dashboard Cite

environmental problems. Hydrogen gas (H 2 ) is a clean and storable energy with a higher gravimetric energy density than gasoline (120 vs 44 MJ kg −1 ). Among various hydrogen production strategies, photoelectrochemical (PEC) water splitting has attracted much attention due to its high abundance of water, high purity of generated H 2 , and great reduction of CO 2 emission. [1][2][3][4][5] As the core of the PEC cell, the photoelectrode is composed of a photoanode and a photo cathode, which drives the oxygen evolution reaction (OER, +1.23 V vs reversible hydrogen electrode (RHE)) and hydrogen evolution reaction (HER, 0 V vs RHE), respectively. [1][2][3] At present, both photoanode and photo cathode are facing severe challenges. Among them, photocathode is mainly restricted by the few types of ptype semiconductors (SCs), which need to be improved. Cuprous oxide (Cu 2 O) is one of the most important photocathode materials and has many advantages, such as nontoxicity, element abundant, and high activity. [6,7] It has a narrow direct bandgap of ≈2.0 eV that favors visible light absorption. Its conduction band edge is more negative than −0.7 V versus RHE, providing a large driving force for HER. [6][7][8][9] The theoretical value of photocurrent density is as high as In the field of photoelectrochemical (PEC) water splitting, cuprous oxide (Cu 2 O) is one of the most promising photocathode materials, but its performance is restricted by poor carrier separation ability and low photovoltage. In order to overcome these limitations, a new kind of Cu 2 O-ZnO blended heterojunction photocathode is designed and prepared by novel one-step thermal oxidation method. ZnO granules are uniformly distributed in Cu 2 O film matrix, forming a granular structure, which enhances the band bending of Cu 2 O in the electrolyte and improves the photovoltage. In addition, the formed ladder type band alignment of Cu 2 O-ZnO facilitates the spatial separation of photoexcited carriers. Different from the conventional layered heterojunction, the granular structured heterojunction proposed in this work extends the built-in electric field region and further promotes the transmission of photoexcited carriers from the photoelectrode to the electrolyte. At 0 V vs reversible hydrogen electrode (RHE), the photocurrent density of Cu 2 O-ZnO film is as high as −8.7 mA cm −2 , which is over 6 times that of bare Cu 2 O (−1.3 mA cm −2 ). The onset potential positively shifts from 0.57 V vs RHE to 0.78 V vs RHE. This work provides an effective strategy for improving the PEC performance from the perspective of band alignment and material structure.

show abstract

Induction of a piezo-potential improves photocatalytic hydrogen production over ZnO/ZnS/MoS2 Heterostructures

Cited by 58 publications

References 41 publications

Zn-doped SnS with sulfur vacancies for enhanced photocatalytic hydrogen evolution from water

Zn-doped SnS with sulfur vacancies for enhanced photocatalytic hydrogen evolution from water

CdS nanocages@defective-CoNi-LDH with bilayer porous hollow frameworks toward optimized sono-photocatalytic performance

Design and In Situ Growth of Cu₂O‐Blended Heterojunction Directed by Energy‐Band Engineering: Toward High Photoelectrochemical Performance

Contact Info

Product

Resources

About

Induction of a piezo-potential improves photocatalytic hydrogen production over ZnO/ZnS/MoS2 Heterostructures

Cited by 58 publications

References 41 publications

Zn-doped SnS with sulfur vacancies for enhanced photocatalytic hydrogen evolution from water

Zn-doped SnS with sulfur vacancies for enhanced photocatalytic hydrogen evolution from water

CdS nanocages@defective-CoNi-LDH with bilayer porous hollow frameworks toward optimized sono-photocatalytic performance

Design and In Situ Growth of Cu2O‐Blended Heterojunction Directed by Energy‐Band Engineering: Toward High Photoelectrochemical Performance

Contact Info

Product

Resources

About

Design and In Situ Growth of Cu₂O‐Blended Heterojunction Directed by Energy‐Band Engineering: Toward High Photoelectrochemical Performance