CATALYSIS LETTERS
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2020
·Vol. 151
·期 5
·1231-1238
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IF 2.482
Ge Jianhua,Ding Xiulong,Jiang Daochuan,Zhang Lei,Du Pingwu
Abstract Photoelectrochemical (PEC) water splitting using BiVO 4 semiconductor photoanodes have been appealed to plenty of attentions in the past few decades. In this study, FeP was used as an active precious-metal-free cocatalyst for the first time to enhance the performance of worm-like nanoporous BiVO 4 photoanodes for PEC water splitting. Characterization results demonstrate that FeP nanoparticles were successfully deposited on surface of the pritine BiVO 4 photoanodes, and served as an noble metal-free cocatalyst for solar-driven PEC water splitting. Furthermore, a maximum photocurrent density of ~ 3.05 mA/cm 2 at 1.23 V vs RHE could be achieved by loading moderate amount of FeP on the surface of BiVO 4 , which is about 1.6 times higher than that of the unmodified BiVO 4 . Meanwhile, the efficient suppression of surface recombination by FeP was also confirmed by the PEC measurements in Na 2 SO 3 solution. The maximum ABPE of FeP/BiVO 4 photoanodes was ~ 0.53% at 0.60 V vs RHE, indicating the potential application for overall solar-driven water splitting. Graphic Abstract
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Lanlan Zhang,Qi Wang,Yuhong He,Shihao Han,Xiaolu Wang,Yangfang Liao,Qingping Dai,Bing Lv,Wenzhong Wang
In this study, we present a promising CeO 2 /AgInS 2 heterostructure photoanode for photoelectrochemical (PEC) water decomposition. Mott-Schottky analysis is employed to confirm the formation of a type-II heterostructure between AgInS 2 nanoparticles and CeO 2 nanosheet arrays (NSAs) fabricated through electrochemical deposition and successive ionic layer adsorption and reaction. Electrochemical impedance spectroscopy, photoluminescence analysis, and Bode diagram spectroscopy confirm the effective charge carrier separation and significantly prolonged the charge lifetime of the CeO 2 /AgInS 2 heterojunction photoanode. Consequently, the maximum photocurrent density of the constructed CeO 2 /AgInS 2 photoanode relative to Ag/AgCl under zero bias test conditions is 69.8 times higher than the pure CeO 2 NSAs. Additionally, the charge transfer mechanism is further verified by the calculated work function and differential charge density of CeO 2 /AgInS 2 heterojunction. This study provides a valuable reference for the synthesis and preparation of heterojunction photoanode for efficient PEC water decomposition.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Ying Meng,Lin An,Xin Han,Yaogang Li,Chengyi Hou,Qinghong Zhang,Hongzhi Wang
(Ga 1−x Zn x )(N 1−x O x ) has attracted extensive attention in photoelectrochemical (PEC) water splitting for its narrow and controllable band gap recently. For optimizing PEC performance of (Ga 1−x Zn x )(N 1−x O x ) photoanodes, the key points are to tailor its band gap and improve the light harvesting. In this work, black silicon prepared by metal-assisted chemical etching (MACE) is selected as the substrate of photoanodes, owing to its excellent features such as porous structure and much lower reflective index compared to smooth Si wafer. Moreover, a rapid and effective synthesis method is developed to prepare (Ga 1−x Zn x )(N 1−x O x ) nanorods with ZnO content from 16 to 94% on black silicon. As prepared black silicon/(Ga 1−x Zn x )(N 1−x O x ) nanorods were characterized by XRD, FESEM, EDS, XPS, TEM and UV–Vis et al. The (Ga 1−x Zn x )(N 1−x O x ) nanorods with a diameter of 200 nm and an aspect ratio of 15 are directly grown on black silicon as photoanodes, which lead to much better light harvesting and better interface adherence. As a consequence, the photocurrent density of black silicon/(Ga 1−x Zn x )(N 1−x O x ) nanorods photoanode is 55 μA/cm 2 , almost 5.5 times higher than (Ga 1−x Zn x )(N 1−x O x ) nanorods on single-crystal silicon under the same conditions. The result indicates that the (Ga 1−x Zn x )(N 1−x O x ) nanorods grown on black silicon as photoanodes have great potential application in the PEC water splitting.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 17
·5760-5770
·
IF 4
Shouli Bai,Shiyu Jia,Yingying Zhao,Yongjun Feng,Ruixian Luo,Dianqing Li,Aifan Chen
Photoelectrochemical (PEC) water splitting has been recognized as the most promising approach for directly converting solar energy into chemical energy, and substantial efforts have been made to develop a highly efficient and low-cost photoanode for enhancement of PEC water splitting efficiency due to sluggish water oxidation reaction kinetics. A ternary NiFePB-modified ZnO/BiVO4 heterojunction photoanode was simply assembled by low-temperature hydrothermal, metal–organic decomposition and electrodeposition methods to improve the water splitting efficiency; its photocurrent density for water oxidation reached 1.66 mA cm−2 at 1.23 V (vs. RHE); in comparison, that of ZnO is only 0.4 mA cm−2. The onset potential manifests a cathodic shift of ∼283 mV compared to ZnO. The IPCE and the ABPE respectively are 3.1 and 6.4 times those of ZnO, respectively. This improvement is ascribed to the efficient separation of photogenerated electrons and holes by the formation of a heterojunction between ZnO and BiVO4 and the enhancement in the oxygen evolution reaction kinetics by the decoration of the co-catalyst NiFePB as a hole acceptor.
研究领域:
材料科学
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能源转换与储存
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Shiyu Jia,Ziyang Liu,Yuanpan Gao,Ruoran Zhang,Rui Zhu,Shanshan Gao,Peipei Guan,Xuanran Geng,Ke Tian,Shouli Bai
The design of photoanode materials to achieve efficient water splitting is a current research hotspot in photoelectrochemical (PEC). In this work, we designed and prepared an α-Fe 2 O 3 /BiVO 4 heterostructure modified by carbon quantum dots ((α-Fe 2 O 3 /BiVO 4 /CQDs)) as the photoanode. The modification of CQDs can broaden the sunlight absorption ability and dramatically enhance the water oxidation kinetics of α-Fe 2 O 3 /BiVO 4 /CQDs. The optimized photoanode demonstrated a photocurrent density of 1.32 mA·cm −2 at 1.23 V vs. RHE, which is 2.2 times than pristine α-Fe 2 O 3 (0.6 mA·cm −2 ) photoanode. The IPCE value above 29.4 % at 400 nm, and the onset potential is negatively shifted by 243 mV for α-Fe 2 O 3 /BiVO 4 /CQDs. The improved performance is mainly due to the α-Fe 2 O 3 /BiVO 4 heterojunction to achieve effective separation of photogenerated carriers in the bulk phase and CQDs to improve light utilisation and OER kinetics of the photoanode.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Mengyao Guo,Sikai Yao,Wenjie Zhang,Qichang Wang,Richen Lin,Daolun Liang,Dekui Shen
The separation and transfer efficiency of photogenerated electron-hole pairs in TiO 2 nanorod is crucial for its photoelectrochemical (PEC) water-splitting performance. A band-matched TiO 2 homojunction photoanode was synthesized through a two-step hydrothermal method, where the anatase TiO 2 shell was controllably grown over Co-doping rutile TiO 2 nanorod arrays. Oxygen vacancies of the rutile TiO 2 nanorods were prominently generated with the doping of Cobalt, regarding the positive shift of the energy bands. The conduction/valence band offsets between rutile and anatase TiO 2 were increased to 0.43 and 0.25 eV, increasing the driving force for the separation of photogenerated electron-hole pairs, effectively suppressing the recombination of carriers. The cobalt doped TiO 2 homojunction photoanode with the anatase shell thickness of 42 nm demonstrated an outstanding PEC performance, with a photocurrent density of 1.45 mA cm −2 at 1.23 V vs. RHE and a hydrogen production rate of 26.17 μmol cm −2 h −1 . The results provided an effective strategy for the development of TiO 2 homojunction with high PEC water splitting performance.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2017
·Vol. 44
·期 2
·1013-1024
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IF 1.369
Li Yan,Hu Yingfei,Fang Tao,Li Zhaosheng,Zou Zhigang
BiVO 4 has emerged as a promising material for solar water splitting. The poor ability of charge transport and separation always limits its performance for photoelectrochemical water splitting. Herein, we coupled n-type BiVO 4 with p-type LaFeO 3 and LaCoO 3 , achieving a photocurrent more than two times as high as bare BiVO 4 at 1.23 V versus a reversible hydrogen electrode. Also, the onset potential was negatively shifted about 260 mV. The promotion of performance is mainly because the space charge layer in BiVO 4 is broadened, and the band bend is enhanced, which facilitates the separation and transport of photo-generated charges.
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
高影响因子
Micromachines
·
2024
·Vol. 15
·期 3
·387
·
IF 3
Wenyao Zhang,Ya Zhang,Xiao Miao,Ling Zhao,Changqing Zhu
Hematite is one of the most promising photoanode materials for the study of photoelectrochemical (PEC) water splitting because of its ideal bandgap with sufficient visible light absorption and stability in alkaline electrolytes. However, owing to the intrinsically high electron-hole recombination, the PEC performance of hematite is still far below that expected. The efficient charge separation can be achieved via growth of FeOOH on hematite photoanode. In this study, hematite nanostructures were successfully grown on the surface of iron foil by the simple immersion deposition method and thermal oxidation treatment. Furthermore, cocatalyst FeOOH was successfully added to the hematite nanostructure surface to improve charge separation and charge transfer, and thus promote the photoelectrochemical water splitting. By utilizing the FeOOH overlayer as a cocatalyst, the photocurrent density of hematite exhibited a substantial 86% increase under 1.5 VRHE, while the onset potential showed an apparent shift towards the cathodic direction. This can be ascribed to the high reaction area for the nanostructured morphology and high electrocatalytic activity of FeOOH that enhanced the amount of photogenerated holes and accelerated the kinetics of water splitting.
研究领域:
材料科学
·
能源转换
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Yujie Huang,Binyao Liu,Yiwen Yang,Hao Xiao,Tao Han,Hanmei Jiang,Jiahe Li,Yong Zhou,Gaili Ke,Huichao He
Water oxidation is an endothermic and kinetics–sluggish reaction; the research of photoanodes with photothermal and cocatalytic properties is of great significance. Herein, BiVO4/CoAl2O4 film photoanodes were studied for solar water splitting through coupling spinel p-type CoAl2O4 nanoparticles on n-type BiVO4 films. Compared to the BiVO4 photoanode, better performance was observed on the BiVO4/CoAl2O4 photoanode during water oxidation. A photocurrent of 3.47 mA/cm2 was produced on the BiVO4/CoAl2O4 photoanode at 1.23 V vs RHE, which is two-fold to the BiVO4 photoanode (1.70 mA/cm2). Additionally, the BiVO4/CoAl2O4 photoanodes showed an acceptable stability for water oxidation. The BiVO4/CoAl2O4 photoanode being of higher water oxidation performance could be attributed to the presence of p–n heterojunction, cocatalytic, and photothermal effects. In specific, under the excitation of λ < 520 nm light, the holes produced in/on BiVO4 can be transferred to CoAl2O4 owing to the p–n heterojunctions of BiVO4/CoAl2O4. Meanwhile, the temperature on the BiVO4/CoAl2O4 photoanode rises quickly up to ∼53 °C under AM 1.5 G irradiation due to the photothermal property of CoAl2O4 through capturing the 520 < λ < 720 nm light. The temperature rising on the BiVO4/CoAl2O4 photoanode improves the cocatalytic activity of CoAl2O4 and modifies the wettability of BiVO4/CoAl2O4 for effective water oxidation.
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
高影响因子
Journal of Composites Science
·
2025
·Vol. 9
·期 5
·250
·
IF 3.7
Waheed Rehman,Faiq Saeed,Samia Arain,Muhammad Usman,Bushra Maryam,Xianhua Liu
NiFe2O4and TiO2are widely studied for photoelectrochemical (PEC) applications due to their unique properties. Nitrogen-doped graphene (NG) and metal–organic frameworks (MOFs), such as MIL-100(Fe) (where MIL stands for Materials of Lavoisier Institute), are commonly incorporated to enhance PEC performance by offering a high surface area and facilitating efficient charge transport. Composite systems are commonly employed to overcome the limitations of individual PEC catalysts. In this study, a highly efficient NiFe2O4/NG@MIL-100(Fe)/TiO2photoanode was developed to enhance photoelectrochemical water-splitting performance. The composite was synthesized via a hydrothermal method with a two-step heating process. X-ray diffraction confirmed the expected crystal structures, with peak broadening in NiFe2O4indicating reduced crystallite size and increased lattice strain. X-ray photoelectron spectroscopy of the Ni 2p and Fe 2p regions validated the successful integration of NiFe2O4into the composite. Electrochemical analysis demonstrated excellent performance, with linear sweep voltammetry achieving a peak photocurrent density of 3.5 mA cm−2at 1.23 V (vs RHE). Electrochemical impedance spectroscopy revealed a reduced charge-transfer resistance of 50 Ω, indicating improved charge transport. Optical and electronic properties were evaluated using UV-Vis spectroscopy and Tauc plots, revealing a direct bandgap of 2.1 eV. The composite exhibited stable photocurrent under amperometric J-t testing for 2000 s, demonstrating its durability. These findings underscore the potential of NiFe2O4/NG@MIL-100(Fe)/TiO2as a promising material for renewable energy applications, particularly in photoelectrochemical water splitting.
研究领域:
材料科学
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能源科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Xing Cao,Huanhui Chen,Ziqian Lu,Yubin Zhao,Shoujing Wei,Ya Liu,Junrong Zeng,Gaowei Zhang,Qing Ma,Liubiao Zhong,Lijuan Song,Yejun Qiu
The industrial development of BiVO 4 photoanode–based photoelectrochemical (PEC) water splitting is constrained by the poor stability of the BiVO 4 photoanode. However, the effect of phosphorus (P) in commonly used electrolytes on BiVO 4 photoanode stability and the associated mechanism are still scarce. Herein, we investigate the effects of different P-containing electrolytes on the PEC performance of BiVO 4 , as well as the changes in the composition, microstructure, light-absorption properties, and carrier transport and separation efficiencies of BiVO 4 between before and after the reaction. Results demonstrate that at 1.23 V versus reversible hydrogen electrode (V RHE ), the photocurrent decay of BiVO 4 in all P-containing electrolytes after 24 h is >95 %. In acidic environments, H + and PO 4 3− convert BiVO 4 into BiPO 4 , with a larger band gap, resulting in decrease in PEC activity and stability. Under alkaline conditions, P deposits as a phosphorus oxide onto the BiVO 4 surface, resulting in severe carrier recombination and slower water oxidation kinetics. The 24-h photocurrent attenuation is alleviated to 33.5 % via a strategy involving low applied potential (0.8 V RHE ), introduction of labile V ions (NaVO 3 ), and deposition of a cocatalyst layer (NiOOH/FeOOH). This study emphasizes the effect of electrolyte composition on the PEC stability of BiVO 4 and provides a reference for the modification of BiVO 4 .
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
PubMed
高影响因子
CRYSTAL GROWTH & DESIGN
·
2024
·
IF 3.2
Furong Ye,Wen Liu,Changcun Han,Yahao Zhao,Peng Liu,Hui Wang
This study introduces Au nanoparticles into ZnIn2S4 through electrodeposition to overcome the limitation of rapid charge carrier recombination on the photoelectrochemical efficiency. The strong coupling of Au nanoparticles with the FTO substrate not only serves as an electron acceptor but also exhibits a surface plasmon resonance (SPR) effect, significantly enhancing charge carrier separation efficiency. Experimental results demonstrate that the introduction of Au nanoparticles notably improves the light absorption capability of ZnIn2S4, enhancing its solar energy conversion efficiency and rendering it an effective photoelectrocatalytic catalyst. Electrochemical analysis shows that the modified sample achieves a photocurrent density of 0.52 mA/cm2 at 1.23 V (vs RHE), which is 2.15 times that of pure ZnIn2S4, validating the potential of this approach for photoelectrocatalytic applications.
研究领域:
材料科学
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）