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Lu X, Ma Z, Chang Y, Wang S, Li X, Xu D, Bao J, Liu Y. Mott-Schottky Construction Boosted Plasmon Thermal and Electronic Effects on the Ag/CoV-LDH Nanohybrids for Highly-Efficient Water Oxidation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2313057. [PMID: 38768957 DOI: 10.1002/adma.202313057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 04/23/2024] [Indexed: 05/22/2024]
Abstract
Mott-Schottky construction and plasmon excitation represent two highly-efficient and closely-linked coping strategies to the high energy loss of oxygen evolution reaction (OER), but the combined effect has rarely been investigated. Herein, with Ag nanoparticles as electronic structure regulator and plasmon exciter, Ag/CoV-LDH@G nanohybrids (NHs) with Mott-Schottky heterojunction and notable plasmon effect are well-designed. Combining theoretical calculations with experiments, it is found that the Mott-Schottky construction modulates the Fermi level/energy band structure of CoV-LDH, which in turn leads to lowered d-band center (from -0.89 to -0.93), OER energy barrier (from 6.78 to 1.31 eV), and preeminent plasmon thermal/electronic effects. The thermal effect can offset the endothermic enthalpy change of OER, promote the deprotonation of *OOH, and accelerate electron transfer kinetics. Whereas the electronic effect can increase the density of charge carriers (from 0.70 × 1020 to 1.64 × 1020 cm-3), lower the activation energy of OER (from 30.3 to 17.7 kJ mol-1). Benefiting from these favorable factors, the Ag/CoV-LDH@G NHs show remarkable electrocatalytic performances, with an overpotential of 178 and 263 mV to afford 10 and 100 mA cm-2 for OER, respectively, and a low cell voltage of 1.42 V to drive 10 mA cm-2 for overall water splitting under near-infrared light irradiation.
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Affiliation(s)
- Xuyun Lu
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, P. R. China
| | - Zhangyu Ma
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, P. R. China
| | - Yanan Chang
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, P. R. China
| | - Shasha Wang
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, P. R. China
| | - Xiaoxuan Li
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, P. R. China
| | - Dongdong Xu
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, P. R. China
| | - Jianchun Bao
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, P. R. China
| | - Ying Liu
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, P. R. China
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Yang Y, Li X, Liu G, Liu H, Shi Y, Ye C, Fang Z, Ye M, Shen J. Hierarchical Ohmic Contact Interface Engineering for Efficient Hydrazine-Assisted Hydrogen Evolution Reaction. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2307979. [PMID: 37879754 DOI: 10.1002/adma.202307979] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 10/24/2023] [Indexed: 10/27/2023]
Abstract
Hydrazine oxidation reaction coupled with hydrogen evolution reaction (HER) is an effective strategy to achieve low energy water splitting for hydrogen production. In order to realize the application of hydrazine-assisted HER system, researchers have been focusing on the development of electrocatalysts with integrated dual active sites, while the performance under high current density is still unsatisfying. In this work, hierarchical Ohmic contact interface engineering is designed and used as a bridge between the NiMo and Ni2 P heterojunction toward industrial current density applications, with the charge transfer impedance greatly eliminated via such a pathway with low energy barrier. As a proof-of-concept, the importance of charge redistribution and energy barrier at the Ohmic contact interface is investigated by significantly reducing the voltage of overall hydrazine splitting (OHzS) at high current density. Intriguingly, the NiMo/Ni2 P hierarchical Ohmic contact heterojunction can drive current densities of 100 and 500 mA cm-2 with only 181 and 343 mV cell voltage in the OHzS electrolyzer with high electrocatalytic stability. The proposed hierarchical Ohmic contact interface engineering paves new avenue for hydrogen production with low energy consumption.
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Affiliation(s)
- Yifan Yang
- Institute of Special Materials and Technology, Fudan University, Shanghai, 200433, P. R. China
- Department of Materials Science, Fudan University, Shanghai, 200433, P. R. China
| | - Xuanyang Li
- Institute of Special Materials and Technology, Fudan University, Shanghai, 200433, P. R. China
- Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China
| | - Guanglei Liu
- Institute of Special Materials and Technology, Fudan University, Shanghai, 200433, P. R. China
- Department of Materials Science, Fudan University, Shanghai, 200433, P. R. China
| | - Huixiang Liu
- Institute of Special Materials and Technology, Fudan University, Shanghai, 200433, P. R. China
- Department of Materials Science, Fudan University, Shanghai, 200433, P. R. China
| | - Yuehao Shi
- Institute of Special Materials and Technology, Fudan University, Shanghai, 200433, P. R. China
- Department of Materials Science, Fudan University, Shanghai, 200433, P. R. China
| | - Chuming Ye
- Institute of Special Materials and Technology, Fudan University, Shanghai, 200433, P. R. China
- Department of Materials Science, Fudan University, Shanghai, 200433, P. R. China
| | - Zhan Fang
- Institute of Special Materials and Technology, Fudan University, Shanghai, 200433, P. R. China
- Department of Materials Science, Fudan University, Shanghai, 200433, P. R. China
| | - Mingxin Ye
- Institute of Special Materials and Technology, Fudan University, Shanghai, 200433, P. R. China
| | - Jianfeng Shen
- Institute of Special Materials and Technology, Fudan University, Shanghai, 200433, P. R. China
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Chang JN, Shi JW, Li Q, Li S, Wang YR, Chen Y, Yu F, Li SL, Lan YQ. Regulation of Redox Molecular Junctions in Covalent Organic Frameworks for H 2 O 2 Photosynthesis Coupled with Biomass Valorization. Angew Chem Int Ed Engl 2023; 62:e202303606. [PMID: 37277319 DOI: 10.1002/anie.202303606] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 05/15/2023] [Accepted: 06/05/2023] [Indexed: 06/07/2023]
Abstract
H2 O2 photosynthesis coupled with biomass valorization can not only maximize the energy utilization but also realize the production of value-added products. Here, a series of COFs (i.e. Cu3 -BT-COF, Cu3 -pT-COF and TFP-BT-COF) with regulated redox molecular junctions have been prepared to study H2 O2 photosynthesis coupled with furfuryl alcohol (FFA) photo-oxidation to furoic acid (FA). The FA generation efficiency of Cu3 -BT-COF was found to be 575 mM g-1 (conversion ≈100 % and selectivity >99 %) and the H2 O2 production rate can reach up to 187 000 μM g-1 , which is much higher than Cu3 -pT-COF, TFP-BT-COF and its monomers. As shown by theoretical calculations, the covalent coupling of the Cu cluster and the thiazole group can promote charge transfer, substrate activation and FFA dehydrogenation, thus boosting both the kinetics of H2 O2 production and FFA photo-oxidation to increase the efficiency. This is the first report about COFs for H2 O2 photosynthesis coupled with biomass valorization, which might facilitate the exploration of porous-crystalline catalysts in this field.
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Affiliation(s)
- Jia-Nan Chang
- Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, Jiangsu Key Laboratory of New Power Batteries, School of Chemistry and Materials Science, Nanjing Normal University, 210023, Nanjing, P. R. China
| | - Jing-Wen Shi
- Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, Jiangsu Key Laboratory of New Power Batteries, School of Chemistry and Materials Science, Nanjing Normal University, 210023, Nanjing, P. R. China
| | - Qi Li
- Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, Jiangsu Key Laboratory of New Power Batteries, School of Chemistry and Materials Science, Nanjing Normal University, 210023, Nanjing, P. R. China
| | - Shan Li
- Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, Jiangsu Key Laboratory of New Power Batteries, School of Chemistry and Materials Science, Nanjing Normal University, 210023, Nanjing, P. R. China
| | - Yi-Rong Wang
- School of Chemistry, South China Normal University, 510006, Guangzhou, P. R. China
| | - Yifa Chen
- School of Chemistry, South China Normal University, 510006, Guangzhou, P. R. China
| | - Fei Yu
- Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, Jiangsu Key Laboratory of New Power Batteries, School of Chemistry and Materials Science, Nanjing Normal University, 210023, Nanjing, P. R. China
| | - Shun-Li Li
- School of Chemistry, South China Normal University, 510006, Guangzhou, P. R. China
| | - Ya-Qian Lan
- School of Chemistry, South China Normal University, 510006, Guangzhou, P. R. China
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Chen Z, Yu S, Liu J, Zhang Y, Wang Y, Yu J, Yuan M, Zhang P, Liu W, Zhang J. C, F co-doping Ag/TiO 2 with visible light photocatalytic performance toward degrading Rhodamine B. ENVIRONMENTAL RESEARCH 2023:116311. [PMID: 37290622 DOI: 10.1016/j.envres.2023.116311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 05/29/2023] [Accepted: 05/31/2023] [Indexed: 06/10/2023]
Abstract
The organic pollutants in industrial wastewater continuously endanger human health. Therefore, effective treatment of organic pollutants is very urgent. Photocatalytic degradation technology is an excellent solution to remove it. TiO2 photocatalysts are easy to prepare and have high catalytic activity, unfortunately, TiO2 only absorbs ultraviolet light limiting its utilization of visible light. In this study, a facile environmentally friendly synthesis of Ag-coated on micro-wrinkled TiO2-based catalysts in order to extend the absorption of Visible light. Firstly, a fluorinated titanium dioxide precursor was prepared by a one-step solvothermal method, and the precursor was calcined at high temperature in a nitrogen atmosphere to form a carbon dopant, and then a surface silver-deposited carbon/fluorine co-doped TiO2 photocatalyst C/F-Ag-TiO2 was prepared by a hydrothermal method The results showed that the Ag was coated on the wrinkled TiO2 layer and C/F-Ag-TiO2 photocatalyst was synthetized successfully. Benefit from the synergistic effect of doped carbon and fluorine atoms in combination with the quantum size effect of the surface silver nanoparticles, the band gap energy of C/F-Ag-TiO2 (2.56 eV) is obviously lower than anatase (3.2eV). The photocatalyst achieved an impressive degradation rate of 84.2% for Rhodamine B in 4 h, with a degradation rate constant of 0.367 h-1, which was 17 times higher than that of P25 under visible light. Therefore, the C/F-Ag-TiO2 composite is a promising candidate as a highly efficient photocatalyst for environmental remediation.
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Affiliation(s)
- Zhengyang Chen
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China
| | - Shui Yu
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China
| | - Jianping Liu
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China
| | - Yamei Zhang
- School of Science, Jiangsu University of Science and Technology, Zhenjiang, 212003, China.
| | - Yuchen Wang
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China
| | - Jiangyi Yu
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China
| | - Ming Yuan
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China
| | - Pengchao Zhang
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China
| | - Wen Liu
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China.
| | - Jiaoxia Zhang
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China.
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