JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2021
·Vol. 168
·期 7
·071513
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IF 4.316
Xiayu Lu,Li Liu,Yu Cui,Fuhui Wang
TiO2 p-n heterojunctions modified with zeolitic imidazolate framework-67 (ZIF-67), a metal-organic framework, were successfully fabricated by a solution self-assembly method, and their photoelectrochemical and photocathodic performance was investigated. The presence of the organic ligands in ZIF-67 enabled ZIF-67-TiO2 photoanodes to exhibit excellent stable cathodic protection performance under simulated sunlight illumination compared with traditional organic or inorganic cocatalysts. ZIF-67-TiO2 photoanodes could provide 12 h of effective and stable photocathodic protection for 304 stainless steel (304SS) in 3.5 wt% NaCl solution. Experimental results revealed that the morphology of ZIF-67 cocatalysts affected the photoelectrochemical performance of ZIF-67-TiO2 photoanodes. Compared with large (∼900 nm) ZIF-67-modified TiO2, small (∼115 nm) ZIF-67-modified TiO2 demonstrated an upwardly shifted conduction band (CB) and faster separation and migration of photogenerated carriers. Furthermore, a photoanode made from small ZIF-67-modified TiO2 exhibited a lower photogenerated potential (−0.37 V) than the photoanodes made from large ZIF-67-modified TiO2 and TiO2, this photoanode could provide more effective photocathodic protection for 304SS.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Yangqin Gao,Guoqing Yang,Yanjie Dai,Xuli Li,Jianfeng Gao,Ning Li,Ping Qiu,Lei Ge
Co-substituted LaFeO3 was electrodeposited on the surface of BiVO4 as a co-catalyst to enhance the water splitting performance. Compared to bare BiVO4, the BiVO4/Co-LaFeO3 composite photoanode shows a water oxidation photocurrent of 3.4 mA/cm2 at 1.23 V versus reverse hydrogen electrode, accompanied by a notable cathodic shift in the onset potential for 300 mV. Combined optical and electrochemical characterizations show that the solid/electrolyte charge transfer efficiency of BiVO4 are dramatically improved by the incorporation of Co-substituted LaFeO3. From the surface kinetic study of charge carriers by intensity-modulated photocurrent spectroscopy, a suppressed surface recombination rate constant is observed and the enhanced photoelectrochemical water splitting performance observed in the BiVO4/Co-LaFeO3 photoanode is attributed to the surface passivation effect of Co-substituted LaFeO3.
研究领域:
材料科学
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电化学
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可再生能源
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DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 22
·11830-11837
·
IF 7.443
Houlei Cui,Guilian Zhu,Yian Xie,Wei Zhao,Chongyin Yang,Tianquan Lin,Hui Gu,Fuqiang Huang
Black TiO2, with increased solar light absorption and enhanced photocatalytic and photoelectrochemical (PEC) performance, has attracted enormous attention, stimulating us to explore the blackening of other oxide semiconductors for enhanced properties. Here, we report the fabrication of black nanostructured Nb2O5 and its enhanced PEC properties for the first time. We successfully prepared oxygen-deficient black Nb2O5 nanochannels, which contain a considerable amount of oxygen vacancies (Nb4+ sites) serving as shallow donors. Black Nb2O5 exhibits strong visible and infrared light absorption, which can absorb 75.5% solar energy, which is superior to 5.7% for pristine Nb2O5. The PEC performance of black Nb2O5 photoanodes is significantly enhanced with a relatively large photocurrent of 1.02 mA cm−2 and a high applied bias photon-to-current efficiency (ABPE) of 0.345%, in comparison with the poor performance of pristine Nb2O5 (0.084 mA cm−2 photocurrent and 0.056% ABPE). These results indicate that black Nb2O5 is a promising material for PEC application and solar energy utilization.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Yinguo Zhou,Lei Zhang,Kai Zhou
The halide perovskite/TiO 2 materials have been extensively employed for solar cells; however, they suffer from limited optoelectronic performance and stability in aqueous solution. In this manuscript, we employ a commercially available perylene dye, namely perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA), between the halide perovskite layer and the TiO 2 layer, to improve the photoelectrochemical properties of the prototypical CH 3 NH 3 PbI 3 /TiO 2 film in the aqueous solution. The incorporation of the perylene dye into the perovskite photoanode induces a photocurrent value twice as much as that offered by the bare perovskite-based film in the aqueous solution. The first-principles calculations suggest that the adsorption of the perylene dye molecule on the halide perovskite substrate is stable and the dye/perovskite interfacial structure depends on the perovskite surface terminations: for the PbI 2 -terminated perovskite surface, the perylene dye molecule interacts with the perovskite surface via the O⋯Pb contact; for the CH 3 NH 3 I-terminated perovskite surface, the perylene dye molecule interacts with the perovskite surface via the H⋯N contact. This study facilitates the fundamental understanding of the dye-sensitized halide perovskite materials for optoelectronic applications.
研究领域:
材料科学
·
物理化学
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DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2019
·Vol. 23
·期 5
·1621-1630
·
IF 2.531
Zhao Liu-Dan,Zhang Qian,Fan Jin-Bin,Yin Li-Qiang,Qi Peng-Wei,Yao Hong-Chang,Li Zhong-Jun
The search for efficient and powerful photoanode materials remains one of the toughest challenges in photoelectrochemical (PEC) water splitting because the oxygen evolution reaction on the photoanode is a rate-limiting process. On the other hand, the semiconductor/liquid interface is a key factor governing the water splitting efficiency due to its influence on charge separation and collection. Herein, we synthesized vertically aligned WO 3 nanosheet array (NS) films on fluorine-doped tin oxide (FTO), and followed by electroreduction for tuning the surface structure of WO 3 NSs. A disordered layer is formed on the surface of WO 3 NSs by controlling the external bias voltage and reduction time of electroreduction, and its thickness of the disordered layer varies with reduction time. The optimal WO 3 NSs with a 1.2 nm disorder layer thickness exhibit a remarkable photocurrent density of 1.07 mA cm −2 at 1.23 V vs reversible hydrogen electrode (RHE) under AM 1.5G illumination, which is 1.43 times of pristine WO 3 NSs. The results indicate that the electroreduction voltage and reduction time exert great influence on the formation of the surface disordered layer, and the optimized reduction conditions can enhance charge transfer and charge separation efficiency, substantially improving the PEC performance of WO 3 photoanode.
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
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Xue Li,Jinquan Wan,Yongwen Ma,Yan Wang,Xitong Li
The serious recombination of photogenerated carriers and the photochemical corrosion of the electrode extremely restricted its photoelectrochemical (PEC) performance, which could not reach the theoretical photocurrent intensity. However, so far, there are few comprehensive reports on the mechanism of corrosion inhibition and stability improvement of electrodes in photocatalytic degradation. In this paper, BiVO 4 /Cu 2 O heterojunction modified by Cobalt-phosphate (Co-Pi) co-catalyst was successfully prepared to address the aforementioned issues. Co-Pi completed the holes capture and release process through the change of its own chemical state (Co 2+/3+ →Co 4+ →Co 2+/3+ ), and also affected the energy band bending of the BiVO 4 /Cu 2 O heterojunction. In addition, the effect mechanism of the Co-Pi film thickness on the PEC performance of the photoanode was systematically discussed in this report. When the deposition amount was 0.05C∙cm −2 , the photocurrent density reached 2.22 mA∙cm −2 at 1.23 V (vs. RHE), which was 2.8 times that of bare BiVO 4 . The LSV curves, EIS and UV–vis absorption spectra reveal the enhanced PEC performance and light stability of the prepared electrode materials. When it is applied to photocatalytic degradation of organic pollutants, BiVO 4 /Cu 2 O/0.05Co-Pi shows high activity and potential for MB and CIP degradation, and is expected to be stably applied to the field of photocatalytic degradation of refractory organic pollutants in water.
研究领域:
材料科学
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环境科学
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电化学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Haipeng Wang,Shuyun Wang,May Thawda Oo,Yuewen Yang,Jiasheng Zhou,Miaoyan Huang,Rui-Qin Zhang
The photoelectrochemical (PEC) performance of bismuth vanadate (BiVO 4 ) suffers from sluggish charge mobility and substantial charge recombination losses due to its intrinsic defect. To rectify the problem, we developed a novel approach to prepare an n - n + type II BVO ac -BVO al homojunction with staggered band alignment. This architecture involves a built-in electric field that facilitating the electron-hole separation at the BVO ac /BVO al interface. As a result, the BVO ac -BVO al homojunction shows superior photocurrent density up to 3.6 mA/cm 2 at 1.23 V vs. reversible hydrogen electrode (RHE) with 0.1 M sodium sulfite as the hole scavenger, which is 3 times higher than that of the single-layer BiVO 4 photoanode. Unlike the previous efforts that modifying the PEC performance of BiVO 4 photoanodes through incorporating heteroatoms, the highly-efficient BVO ac -BVO al homojunction was achieved without incorporating any heteroatoms in this work. The remarkable PEC activity of the BVO ac -BVO al homojunction highlights the tremendous importance of reducing the charge recombination rate at the interface by constructing the homojunction and offers an effective strategy to form the heteroatoms-free BiVO 4 thin film as an efficient photoanode material for practical PEC applications.
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
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Jingkun Wang,Jidong Sun,Yuliang Liu,Xun Zhang,Kai Cheng,Yupeng Chen,Fangzhou Zhou,Jujie Luo,Tianbao Li,Junjie Guo,Bingshe Xu
Modification of oxygen evolution co-catalyst (OEC) on the surface of bismuth vanadate (BiVO 4 ) can effectively improve the kinetics of water oxidation, but it is still limited by the small hole extraction driving force at the BiVO 4 /OEC interface. Modulating the BiVO 4 /OEC interface with a hole transfer layer (HTL) is expected to facilitate hole transport from BiVO 4 to the OEC surface. Herein, a copper(I) thiocyanate (CuSCN) HTL is inserted between BiVO 4 and NiFeO x OEC to create BiVO 4 /CuSCN/NiFeO x photoanode, resulting in a significant enhancement of photoelectrochemical (PEC) water splitting performance. From electrochemical analyses and density functional theory (DFT) simulations, the markedly enhanced PEC performance is attributed to the insertion of CuSCN as an HTL, which promotes the extraction of holes from BiVO 4 surface and boosts the water oxidation kinetics. The optimal photoanode achieves a photocurrent density of 5.6 mA cm −2 at 1.23 V versus the reversible hydrogen electrode (vs. RHE) and an impressive charge separation efficiency of 96.2 %. This work offers valuable insights into the development of advanced photoanodes for solar energy conversion and emphasizes the importance of selecting an appropriate HTL to mitigate recombination at the BiVO 4 /OEC interface.
研究领域:
材料科学
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能源转换
·
界面工程
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 53
·47813-47819
·
IF 3.289
Yuyu Bu,Zhiwei Chen,Tian Xie,Weibing Li,Jin-Ping Ao
In this paper, we prepared a large-sized multilayer C3N4 ultrathin flake photocatalyst with an approximately 90% yield rate by a facile wet mechanical grinding method. The blue shift phenomenon of the UV-Vis diffuse reflectance spectrum and photoluminescence spectrum indicated that a quantum effect was formed with the thickness of g-C3N4 (g-CN) when decreased to ultrathin flakes. The photocatalysis water reduction for hydrogen evolution performance of ultrathin flake C3N4 (UF-CN) was approximate 3.2 times higher than that of g-CN. In addition, the photoelectrochemical (PEC) property of UF-CN was increased more dramatically than that of g-CN. There are two possible reasons for photocatalysis and PEC performances of UF-CN promotion. First, the valence band (VB) potential of UF-CN was 1.59 eV, which was 0.25 eV more positive than that of g-CN, thus the oxidation capacity of UF-CN photogenerated holes would be stronger than the bulk counterpart. Secondly, the electrons transfer capacity on the horizontal plane of UF-CN was increased with the layered structure of the g-CN exfoliated to an ultrathin structure, thus prolonging the life time of the photogenerated electrons.
研究领域:
材料科学
·
光催化技术
·
纳米材料
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Youxu Yu,Jinwang Li,Yuxin Liu,Zhefei Pan,Xun Zhu,Dingding Ye,Yang Yang,Hong Wang,Liang An,Rong Chen,Qiang Liao
Mesoporous TiO 2 photoanode shows promising application in photoelectrochemical systems due to large specific surface area and regular mesoporous structure. The evaporation-induced self-assembly method is usually employed for the preparation of mesoporous TiO 2 photoanodes. However, the photoelectrochemical performance of such a mesoporous TiO 2 photoanode prepared by this method is still unable to meet the demand owing to low photocatalyst loading, because the in-plane tensile stress during calcination may destroy the mesoporous TiO 2 film. To address this issue, the micropillar arrays supported mesoporous TiO 2 photoanode is proposed by directly synthesizing mesoporous TiO 2 film on the micropillar arrays loaded substrate. It is shown that the micropillar arrays interspersed inside the mesoporous TiO 2 film can help release the in-plane tensile stress during calcination, keeping the mesoporous structure intact. As a result, the photoelectrochemical cell with the optimized micropillar arrays supported mesoporous TiO 2 photoanode exhibits superior performance than does the nanoparticles-packed TiO 2 photoanode. Remarkably, the proposed method allows for preparing the TiO 2 micropillar arrays, by which the formed TiO 2 micropillar arrays supported mesoporous TiO 2 photoanode yields the optimal performance. As compared to the nanoparticles-packed TiO 2 photoanode, the short circuit current density and maximum power density increase by 63.6 % and 18.8 %, respectively.
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
Journal of Energy Chemistry
·
2025
·
IF 14.9
Jing Gao,Qitao Liu,Haotian Wang,Muhammad Bilal Akbar,Zhihua Wu,Jiabo Le,Jianming Li,Qinglu Liu,Yongbo Kuang
CuBi 2 O 4 (CBO) photocathodes hold significant promise for efficient photoelectrochemical (PEC) water splitting due to their favorable band gap and theoretical onset potential. However, their practical application is hindered by poor charge separation efficiency. Herein, we introduce a characteristic in-situ solution Fe-doping strategy that markedly improves photoelectrochemical performance of CBO, doubling the photocurrent density and achieving an unprecedented 190 mV anodic shift in the onset potential. By integrating with an electrochemical oxidation post-treatment, a record incident photon-to-current efficiency (IPCE) exceeding 40% at 0.6 V vs. RHE under visible light illumination is achieved. The versatility of the doping strategy is demonstrated across CBO photocathodes synthesized by different methods with various morphologies, grain sizes, and crystallinities. Mechanistic studies reveal that the gradient distribution of Fe 3+ ions generates an internal electric field that facilitates efficient charge separation and increases acceptor density. The strong Fe–O bonding also enhances structural stability against photo-induced corrosion. Notably, our investigation uncovers the non-temperature-dependent nature of CBO photocurrent, indicating that PEC performance enhancement primarily depends on reducing carrier recombination rather than improving bulk conductivity. This work lays the groundwork for future advancements in water splitting performance of CBO photocathodes, offering a complementary strategy to conventional methods for enhancing charge separation efficiency.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Huifang Wang,Jun Zhang,Qichong Zhang,Hao Wu,Xiaohong Xu
The p-n heterojunctions with the built-in electric field are often adopted to promote the separation of photoexcited electron-hole pairs and enhance the photoelectrochemical (PEC) performance. However, the interface states often affect the band alignment of ZnO/Cu 2 O heterointerface and cause the decline of PEC performance. In this study, the ultrathin insulating Al 2 O 3 layer was introduced to modify the interface between n-type ZnO nanorod arrays (NRA) and p-type Cu 2 O. Compared to that of ZnO NRA/Cu 2 O, the photocurrent density is significantly improved and onset potential shifts negatively for ZnO NRA-Al 2 O 3 /Cu 2 O. The Al 2 O 3 ultrathin layer is deemed to suppress the photoexcited carriers trapped by the heavy interface defect states via improving the interface quality and block the recombination between electrons in the conduction band of ZnO NRA and holes in the valence band of Cu 2 O. This work broadens the interface modification method of p-n heterojunction and its results are favorable for photovoltaic devices, photodetection and PEC water splitting applications.
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
危险品化学品经营许可证（带存储）