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Wang G, Tang T, Ye KH, Ding X, Chen J, Zou W, Xiao Y, Li J, Zhao L, Chen C, Ge S, Li L, Wei X, Chen C, Cao Y, Lin Z, Zhang S. Dual Hole Transport Layers Heterojunction and Band Alignment Engineered Mo:BiVO 4 Photoanodes for Efficient Water Splitting. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2403600. [PMID: 38949410 DOI: 10.1002/smll.202403600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2024] [Revised: 06/19/2024] [Indexed: 07/02/2024]
Abstract
BiVO4-based photoanode is one of the most promising photoanodes for photoelectrocatalytic water splitting. However, the serious problem of interface charge recombination limits its further development. Here, a Mo:BiVO4/NiOx/CPF-TCzB/NiCoBi photoanode is constructed with double hole transport layer and an energy level gradient to achieve an effective photo-generated holes extraction and accumulation at the surface electrocatalyst. The conjugated polycarbazole framework CPF-TCzB is used as hole transport layer to eliminate the charge recombination center between Mo:BiVO4 and NiCoBi electrocatalyst and realize the extraction and storage of photo-generated hole; NiOx nanoparticles are further inserted between Mo:BiVO4 and CPF-TCzB to form a gradient energy level, eliminating the energy level barrier and optimizing band alignment. As a result, Mo:BiVO4/NiOx/CPF-TCzB/NiCoBi achieves a much higher photocurrent densities of 3.14 mA cm-2 than that of Mo:BiVO4 (0.42 mA cm-2) at 0.6 V versus RHE. This work provides an specific way to adjust the band structure of BiVO4-based photoanodes and realize efficient hole extraction and storage for PEC water splitting.
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Affiliation(s)
- Guilin Wang
- Institute for Sustainable Transformation, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Tongxin Tang
- Institute for Sustainable Transformation, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Kai-Hang Ye
- Institute for Sustainable Transformation, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
- Chemical Engineering Guangdong Laboratory, Jieyang Branch of Chemistry, Jieyang, 515200, China
| | - Xin Ding
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Junwei Chen
- Institute for Sustainable Transformation, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - WenHao Zou
- Institute for Sustainable Transformation, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Yushen Xiao
- Institute for Sustainable Transformation, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - JieYu Li
- Institute for Sustainable Transformation, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Long Zhao
- Institute for Sustainable Transformation, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Chaojie Chen
- Institute for Sustainable Transformation, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Sitong Ge
- Institute for Sustainable Transformation, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Lei Li
- Institute for Sustainable Transformation, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Xiujuan Wei
- Institute for Sustainable Transformation, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Chao Chen
- Institute for Sustainable Transformation, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Yang Cao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Zhan Lin
- Institute for Sustainable Transformation, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
- Chemical Engineering Guangdong Laboratory, Jieyang Branch of Chemistry, Jieyang, 515200, China
| | - Shanqing Zhang
- Institute for Sustainable Transformation, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
- Chemical Engineering Guangdong Laboratory, Jieyang Branch of Chemistry, Jieyang, 515200, China
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Wang J, Sun J, Liu Y, Zhang X, Cheng K, Chen Y, Zhou F, Luo J, Li T, Guo J, Xu B. The CuSCN layer between BiVO 4 and NiFeO x for facilitating photogenerated carrier transfer and water oxidation kinetics. J Colloid Interface Sci 2024; 666:57-65. [PMID: 38583210 DOI: 10.1016/j.jcis.2024.04.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Revised: 04/02/2024] [Accepted: 04/02/2024] [Indexed: 04/09/2024]
Abstract
Modification of oxygen evolution co-catalyst (OEC) on the surface of bismuth vanadate (BiVO4) can effectively improve the kinetics of water oxidation, but it is still limited by the small hole extraction driving force at the BiVO4/OEC interface. Modulating the BiVO4/OEC interface with a hole transfer layer (HTL) is expected to facilitate hole transport from BiVO4 to the OEC surface. Herein, a copper(I) thiocyanate (CuSCN) HTL is inserted between BiVO4 and NiFeOx OEC to create BiVO4/CuSCN/NiFeOx 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 BiVO4 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 BiVO4/OEC interface.
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Affiliation(s)
- Jingkun Wang
- College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
| | - Jidong Sun
- College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
| | - Yuliang Liu
- College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
| | - Xun Zhang
- College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
| | - Kai Cheng
- College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
| | - Yupeng Chen
- College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
| | - Fangzhou Zhou
- College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
| | - Jujie Luo
- College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
| | - Tianbao Li
- College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China; Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030032, China.
| | - Junjie Guo
- Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China.
| | - Bingshe Xu
- Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030032, China
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Han Y, Chang M, Zhao Z, Niu F, Zhang Z, Sun Z, Zhang L, Hu K. Selective Valorization of Glycerol to Formic Acid on a BiVO 4 Photoanode through NiFe Phenolic Networks. ACS APPLIED MATERIALS & INTERFACES 2023; 15:11678-11690. [PMID: 36808942 DOI: 10.1021/acsami.2c20516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The integration of the glycerol oxidation reaction (GOR) with the hydrogen evolution reaction in photoelectrochemical (PEC) cells is a desirable alternative to PEC water splitting since a large quantity of glycerol is easily accessible as the byproduct from the biodiesel industry. However, the PEC valorization of glycerol to the value-added products suffers from low Faradaic efficiency and selectivity, especially in acidic conditions, which is beneficial for hydrogen production. Herein, by loading bismuth vanadate (BVO) with a robust catalyst composed of phenolic ligands (tannic acid) coordinated with Ni and Fe ions (TANF), we demonstrate a modified BVO/TANF photoanode for the GOR with a remarkable Faradaic efficiency of over 94% to value-added molecules in a 0.1 M Na2SO4/H2SO4 (pH = 2) electrolyte. The BVO/TANF photoanode achieved a high photocurrent of 5.26 mA·cm-2 at 1.23 V versus reversible hydrogen electrode under 100 mW/cm2 white light irradiation for formic acid production with 85% selectivity, equivalent to 573 mmol/(m2·h). Transient photocurrent and transient photovoltage techniques and electrochemical impedance spectroscopy along with intensity-modulated photocurrent spectroscopy indicated that the TANF catalyst could accelerate hole transfer kinetics and suppress charge recombination. Comprehensive mechanistic investigations reveal that the GOR is initiated by the photogenerated holes of BVO, while the high selectivity to formic acid is attributed to the selective adsorption of primary hydroxyl groups in glycerol on TANF. This study provides a promising avenue for highly efficient and selective formic acid generation from biomass in acid media via PEC cells.
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Affiliation(s)
- Yiming Han
- Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
| | - Mingwei Chang
- College of Mathematics and Physics, Shanghai University of Electric Power, Shanghai 201306, China
| | - Zijian Zhao
- Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
| | - Fushuang Niu
- Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
| | - Zhenghao Zhang
- Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
| | - Zehui Sun
- Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
| | - Liming Zhang
- Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
| | - Ke Hu
- Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
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