C-doped ZnS-ZnO/Rh nanosheets as multijunctioned photocatalysts for effective H2 generation from pure water under solar simulating light

Khan, Sovann; Je, Minyeong; Ton, Nhan Nu Thanh; Lei, Wenwei; Taniike, Toshiaki; Yanagida, Sayaka; Ogawa, Daisuke; Suzuki, Norihiro; Terashima, Chiaki; Fujishima, Akira; Choi, Heechae; Katsumata, Ken Ichi

doi:10.1016/j.apcatb.2021.120473

Cited by 49 publications

(20 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition to producing energy in combustion engines, H 2 can also be directly converted into electric power by fuel cells ( Figure 1 A). If H 2 can be produced via a photocatalytic water-splitting reaction [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 ], renewable energy can be produced from sunlight and water, which are abundant on Earth ( Figure 1 B). Therefore, water-splitting photocatalysts have attracted huge attention as a means to address energy and environmental problems.…”

Section: Introductionmentioning

confidence: 99%

Development and Functionalization of Visible-Light-Driven Water-Splitting Photocatalysts

et al. 2022

View full text Add to dashboard Cite

With global warming and the depletion of fossil resources, our fossil fuel-dependent society is expected to shift to one that instead uses hydrogen (H2) as a clean and renewable energy. To realize this, the photocatalytic water-splitting reaction, which produces H2 from water and solar energy through photocatalysis, has attracted much attention. However, for practical use, the functionality of water-splitting photocatalysts must be further improved to efficiently absorb visible (Vis) light, which accounts for the majority of sunlight. Considering the mechanism of water-splitting photocatalysis, researchers in the various fields must be employed in this type of study to achieve this. However, for researchers in fields other than catalytic chemistry, ceramic (semiconductor) materials chemistry, and electrochemistry to participate in this field, new reviews that summarize previous reports on water-splitting photocatalysis seem to be needed. Therefore, in this review, we summarize recent studies on the development and functionalization of Vis-light-driven water-splitting photocatalysts. Through this summary, we aim to share current technology and future challenges with readers in the various fields and help expedite the practical application of Vis-light-driven water-splitting photocatalysts.

show abstract

Section: Introductionmentioning

confidence: 99%

Development and Functionalization of Visible-Light-Driven Water-Splitting Photocatalysts

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Because PVA contained a large number of -OH groups [28], the intensity of O1s was the highest. S2p peaks were observed at ~161 and 163 eV, identified as S2p3/2 and 2p1/2 of the S 2-oxidation state of the sulfur lattice of ZnS [13,29,30]. XPS analysis confirmed that PVA-ZnOS contained both ZnS and ZnO, corresponding well to XRD spectra.…”

Section: Resultsmentioning

confidence: 65%

“…Reaction mechanisms of H 2 evolution from scavenger Na 2 S/Na 2 SO 3 solutions containing S 2− , SO 3 2−, or S 2 O 3 2− with PVA-ZnOS hydrogel are proposed in Figure 7. The valence band maximum (VBM) and conduction band minimum (CBM) of ZnO and ZnS were widely reported in the literature [7][8][9][10][11][12][13][14], where the VB of ZnO is lower than that of ZnS and the CB of ZnS is higher than that of ZnO, allowing maximum redox capability of the ZnO/ZnS interface. The presence of Na 2 S/Na 2 SO 3 solution stimulates the H 2 evolution by scavenging photogenerated holes, suppressing the formation of S 2 2− from Na 2 S by SO 3 2− from Na 2 SO 3 [31].…”

Section: Resultsmentioning

confidence: 99%

“…When UV light was radiated, ZnO/ZnS photocatalyst was activated by Z-scheme heterojunction, where excited electrons at the CB of ZnO recombined with holes at the VB of ZnS [8,11,14]. The accumulation of holes at the VB of ZnO and electrons at the CB of ZnS reduced the recombination between electrons and holes, enhancing the photocatalytic reaction [13,14]. Reactions of holes and electrons in scavenger solution to generate H 2 were performed as follows [31][32][33]:…”

Section: Resultsmentioning

confidence: 99%

“…ZnS-ZnO photocatalyst can oxidize water to produce oxygen gas and simultaneously reduce water to form hydrogen gas [11,12]. We successfully developed ZnS-ZnO nanostructures for high-performance H 2 -generation reaction and Cr(VI) reduction [13,14].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

ZnO/ZnS-Polyvinyl Alcohol Hydrogel for Photocatalytic H2-Generation

et al. 2022

Self Cite

View full text Add to dashboard Cite

The separation of nanoparticles from a solution-based photocatalytic reaction is a significant problem in practical applications. To address the issue, we developed a new photocatalyst composite based on ZnO-ZnS heterojunction (ZnOS) embedded in polyvinyl alcohol (PVA) hydrogel, which showed satisfactory results for photocatalyst recycling. PVA-ZnOS composite hydrogel was fabricated by freezing-induced gelation, which enabled the encapsulation of ZnOS nanoparticles into polymeric matrices. PVA hydrogel served as a promising candidate in photocatalytic applications due to its excellent properties such as high transparency, porosity, hydrophilicity, and stability under ultraviolet (UV) light. PVA-ZnOS hydrogel showed worthy activity in H2 generation from Na2S/Na2SO3 aqueous solution under UV radiation with a production rate of 18.8 µmol.h−1. PVA-ZnOS composite hydrogel is a separation-free photocatalyst, which is prospective in a solution-based photocatalytic reactor.

show abstract

Confining Zero‐Valent Platinum Single Atoms in α‐MoC₁₋_x for pH‐Universal Hydrogen Evolution Reaction

Wang

Lin

et al. 2021

Adv Funct Materials

View full text Add to dashboard Cite

Single-atom electrocatalysts (SACs) toward hydrogen evolution reaction (HER) have been extensively studied owing to their high mass activity and atom utilization. Although platinum (Pt) based SACs have been reported frequently, optimizing the metal-support interaction to achieve low valence state Pt species is still a challenge. Here, the carbon supported α-MoC 1−x nanoparticles are used to anchor zero-valent Pt single atoms (Pt SA /α-MoC 1−x @C) as electrocatalyst for pH-universal HER. The Pt SA /α-MoC 1−x @C with optimized Pt loading of 0.75 wt% shows a low overpotential (21, 12, and 36 mV at 10 mA cm -2 ) and high turnover frequencies (27.00, 31.98, and 21.39 H 2 s -1 at 100 mV) for HER under alkaline, acidic, and neutral electrolyte conditions. Experimental evidence combing density functional theory calculations confirm that the charge polarization leads to a zero-valence state of Pt single atom and further optimized the adsorption/desorption energy of intermediates, further accelerating the reaction dynamics for HER.

show abstract

C-doped ZnS-ZnO/Rh nanosheets as multijunctioned photocatalysts for effective H2 generation from pure water under solar simulating light

Cited by 49 publications

References 51 publications

Development and Functionalization of Visible-Light-Driven Water-Splitting Photocatalysts

Development and Functionalization of Visible-Light-Driven Water-Splitting Photocatalysts

ZnO/ZnS-Polyvinyl Alcohol Hydrogel for Photocatalytic H2-Generation

Confining Zero‐Valent Platinum Single Atoms in α‐MoC₁₋_x for pH‐Universal Hydrogen Evolution Reaction

Contact Info

Product

Resources

About

C-doped ZnS-ZnO/Rh nanosheets as multijunctioned photocatalysts for effective H2 generation from pure water under solar simulating light

Cited by 49 publications

References 51 publications

Development and Functionalization of Visible-Light-Driven Water-Splitting Photocatalysts

Development and Functionalization of Visible-Light-Driven Water-Splitting Photocatalysts

ZnO/ZnS-Polyvinyl Alcohol Hydrogel for Photocatalytic H2-Generation

Confining Zero‐Valent Platinum Single Atoms in α‐MoC1−x for pH‐Universal Hydrogen Evolution Reaction

Contact Info

Product

Resources

About

Confining Zero‐Valent Platinum Single Atoms in α‐MoC₁₋_x for pH‐Universal Hydrogen Evolution Reaction