Ultrasound‐Triggered Surface Reconstruction with Improved Carriers Transfer Kinetics in CdIn2S4 for Solar Water Oxidation DOI

Linxing Meng,

Jinlu He, Shengnan Li

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(3)

Published: Oct. 6, 2023

Abstract The surface oxygen evolution reaction (OER) is severely restricted owing to the sluggish OER kinetics and limited number of reactive sites. Although reconstruction can introduce defects improve performance, they often function as recombination centers cause severe carrier recombination. With aid ultrasonication, CdIn2S4 photoanode reconstructed using Zn‐modified Cd without extreme chemical environment. Owing reconstruction, formed type‐II band structure beneficial for separating photogenerated carriers reduced bulk Additionally, are introduced in situ during ultrasound cavitation process, which facilitated transfer, recombination, increased active First‐principles calculations indicate that modified effectively lower electrochemical barrier promote by precisely regulating four‐electron reaction. Consequently, optimized exhibits a enhanced photocurrent 5.30 mA cm −2 at 1.23 V versus reversible hydrogen electrode. These results demonstrate an accurate design be achieved introducing modifying metal transfer transport behaviors carriers.

Language: Английский

Single-atomic-site platinum steers photogenerated charge carrier lifetime of hematite nanoflakes for photoelectrochemical water splitting DOI Creative Commons
Rui‐Ting Gao, Jiangwei Zhang, Tomohiko Nakajima

et al.

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: May 8, 2023

Although much effort has been devoted to improving photoelectrochemical water splitting of hematite (α-Fe2O3) due its high theoretical solar-to-hydrogen conversion efficiency 15.5%, the low applied bias photon-to-current remains a huge challenge for practical applications. Herein, we introduce single platinum atom sites coordination with oxygen (Pt-O/Pt-O-Fe) into crystalline α-Fe2O3 nanoflakes photoanodes (SAs Pt:Fe2O3-Ov). The single-atom Pt doping can induce few electron trapping sites, enhance carrier separation capability, and boost charge transfer lifetime in bulk structure as well improve injection at semiconductor/electrolyte interface. Further introduction surface vacancies suppress recombination promote reaction kinetics, especially potential. Accordingly, optimum SAs Pt:Fe2O3-Ov photoanode exhibits performance 3.65 5.30 mA cm-2 1.23 1.5 VRHE, respectively, an 0.68% hematite-based photoanodes. This study opens avenue designing highly efficient atomic-level engineering on semiconductors feasible

Language: Английский

Citations

137
All-perovskite-based unassisted photoelectrochemical water splitting system for efficient, stable and scalable solar hydrogen production DOI
Dharmesh Hansora,

Jin Wook Yoo,

Rashmi Mehrotra

et al.

Nature Energy, Journal Year: 2024, Volume and Issue: 9(3), P. 272 - 284

Published: Jan. 23, 2024

Language: Английский

Citations

68
CoMoP Hole Transfer Layer Functionally Enhances Efficiency and Stability of BiVO4 Based Photoanode for Solar Water Splitting DOI
Yingying Wang, Yuxuan Chen,

Yifei Yun

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 358, P. 124375 - 124375

Published: July 6, 2024

Language: Английский

Citations

51
Modulating built-in electric field via Bi-VO4-Fe interfacial bridges to enhance charge separation for efficient photoelectrochemical water splitting DOI
Yingying Wang, Jincheng Huang, Yuxuan Chen

et al.

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 672, P. 12 - 20

Published: May 31, 2024

Language: Английский

Citations

47
Improving Charge Transfer Beyond Conventional Heterojunction Photoelectrodes: Fundamentals, Strategies and Applications DOI
Jiaming Miao, Yilong Yang, Peng Cui

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(46)

Published: June 20, 2024

Abstract Photoelectrochemical (PEC) cells are regarded as a promising approach to convert sunlight chemical fuels, whereas the serious photo‐induced charge recombination of semiconductor photoelectrode hinders its solar conversion efficiency. Over past few decades, designing and constructing heterojunction photoelectrodes via thermodynamically favorable transfer have been proven be effective in boosting separation. However, conventional construction strategy generally introduces incompatible, nonconformal, or defective interfaces, leaving considerable room improve efficiency photoelectrodes. To compensate for unsatisfied efficiency, some novel strategies, such grain boundary engineering, band gap field‐effected etc., adopted provide additional driving force, which significantly improves In this review, these strategies discussed beyond construction, prospects development applications photoanodes also proposed.

Language: Английский

Citations

17
Enhanced Photocatalytic Efficiency Through Oxygen Vacancy‐Driven Molecular Epitaxial Growth of Metal–Organic Frameworks on BiVO4 DOI Open Access

Yan Xin,

Jian Tian, Xianqiang Xiong

et al.

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 19, 2025

Abstract Efficient charge separation at the semiconductor/cocatalyst interface is crucial for high‐performance photoelectrodes, as it directly influences availability of surface charges solar water oxidation. However, establishing strong molecular‐level connections between these interfaces to achieve superior interfacial quality presents significant challenges. This study introduces an innovative electrochemical etching method that generates a high concentration oxygen vacancy sites on BiVO 4 surfaces (Ov‐BiVO ), enabling interactions with oxygen‐rich ligands MIL‐101. reduces formation energy and promotes conformal growth . The Ov‐BiVO /MIL‐101 composite exhibits ideal interface, achieving impressive photocurrent density 5.91 mA cm −2 1.23 V RHE , along excellent stability. high‐performing photoanode enables unbiased tandem device /MIL‐101‐Si cell system, solar‐to‐hydrogen efficiency 4.33%. integration mitigates states enhances internal electric field, facilitating migration photogenerated holes into MIL‐101 overlayer. process activates highly efficient Fe catalytic sites, which effectively adsorb molecules, lowering barrier oxidation improving kinetics. Further studies confirm broad applicability vacancy‐induced molecular epitaxial in various MOFs, offering valuable insights defect engineering optimizing enhancing photocatalytic activity.

Language: Английский

Citations

4
2D Bismuthene as a Functional Interlayer between BiVO4 and NiFeOOH for Enhanced Oxygen‐Evolution Photoanodes DOI
Junyi Cui, Mátyás Dabóczi, Miriam Regue

et al.

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(44)

Published: Sept. 4, 2022

Abstract BiVO 4 has attracted wide attention for oxygen‐evolution photoanodes in water‐splitting photoelectrochemical devices. However, its performance is hampered by electron‐hole recombination at surface states. Herein, partially oxidized two‐dimensional (2D) bismuthene developed as an effective, stable, functional interlayer between and the archetypal NiFeOOH co‐catalyst. Comprehensive (photo)electrochemical photovoltage characterizations show that can effectively increase lifetime of photogenerated holes passivating hole trap states ; however, it limited influencing electron related to oxygen vacancies ( V O ). Loading on increases density are beneficial evolution reaction via formation oxy/hydroxyl‐based water oxidation intermediates surface. Moreover, interfacial band bending fills ‐related traps, leading more efficient charge extraction. With synergistic interaction , this composite photoanode achieves a 5.8‐fold photocurrent compared bare reaching stable 3.4 (±0.2) mA cm –2 low bias +0.8 RHE or 4.7(±0.2) +1.23 . The use 2D provides new strategy enhance photoanodes.

Language: Английский

Citations

56
Porphyrins‐Assisted Cocatalyst Engineering with CoOV Bond in BiVO4 Photoanode for Efficient Oxygen Evolution Reaction DOI Creative Commons

Linxing Meng,

Zunyan Lv,

Weiwei Xu

et al.

Advanced Science, Journal Year: 2023, Volume and Issue: 10(8)

Published: Jan. 16, 2023

Abstract The application of photoelectrochemical (PEC) water splitting is limited by the sluggish surface oxygen evolution reaction (OER) kinetics. OER kinetics can be effectively improved through cocatalyst engineering. However, tardy transfer process and serious recombination carriers are key factors restricting development. Taking BiVO 4 as an example, a Co‐modified heme film rich in large conjugated ring structures introduced onto photoanode using solvothermal method. This functions efficient cocatalyst. It considerably reduces overpotential, promotes photogenerated holes, boosts specifically affecting formation OOH*. Simultaneously, formed CoOV bonds induce strong interaction at photoanode/cocatalyst interfaces, reducing carriers. Consequently, onset potential optimized decreases from 0.45 to 0.07 V photocurrent density 1.23 versus reversible hydrogen electrode 5.3 mA cm −2 . work demonstrates facile strategy for designing cocatalysts obtain rapid hole capability reduced carrier PEC performance.

Language: Английский

Citations

34
Lead-Free Halide Perovskite Cs2AgBiBr6/Bismuthene Composites for Improved CH4 Production in Photocatalytic CO2 Reduction DOI Creative Commons
Michael Segundo Sena, Junyi Cui, Yasmine Baghdadi

et al.

ACS Applied Energy Materials, Journal Year: 2023, Volume and Issue: 6(20), P. 10193 - 10204

Published: Feb. 1, 2023

CO2 photocatalytic conversion into value-added fuels through solar energy is a promising way of storing renewable while simultaneously reducing the concentration in atmosphere. Lead-based halide perovskites have recently shown great potential various applications such as cells, optoelectronics, and photocatalysis. Even though they show high performance, toxicity Pb2+ along with poor stability under ambient conditions restrains application these materials In this respect, we developed an situ assembly strategy to fabricate lead-free double perovskite Cs2AgBiBr6 on 2D bismuthene nanosheet prepared by ligand-assisted reprecipitation method for liquid-phase reduction reaction. The composite improved production selectivity eight-electron CH4 pathway compared two-electron CO pathway, more light harvested photocatalyst. Cs2AgBiBr6/bismuthene shows activity 1.49(±0.16) μmol g–1 h–1 CH4, 0.67(±0.14) CO, 0.75(±0.20) H2, 81(±1)% electron basis 1 sun. performance attributed enhanced charge separation suppressed electron–hole recombination due good interfacial contact between promoted synthesis method.

Language: Английский

Citations

34
The Positive Versus Negative Effects of Defect Engineering for Solar Water Splitting: A Review DOI
Yulong Huang,

Linxing Meng,

Weiwei Xu

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(47)

Published: Sept. 3, 2023

Abstract Although defect design is an essential means of improving the performance photocatalytic materials, introduction not always beneficial. Current engineering focuses on avoiding or modifying introduced defects to mitigate their adverse effects solar water splitting performance. This review comprehensively summarizes strategies for and discusses crucial roles in splitting. Focusing dual defects, most basic schemes preparing favorable through pretreatment posttreatment methods are reviewed. In addition, overcoming mitigating detrimental improve photocatalysts. Finally, challenges prospects developing a defect‐based photocatalyst strategy outlined. provides reference photocatalysts conducting more in‐depth research defects. Additionally, it offers ideas utilizing unfavorable converting them into improvement.

Language: Английский

Citations

32