Molecular level iridium catalyst modified wo3 composite photoanode and its application

A molecular-level, catalyst technology, applied in electrodes, photosensitive devices, photovoltaic power generation, etc., can solve the problems of long cycle, fossil fuel pollution, and high cost, to improve charge separation efficiency, speed up charge transfer, and improve transfer and separation efficiency. Effect

Active Publication Date: 2019-01-01
LIAONING UNIVERSITY
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Problems solved by technology

How to increase its conversion efficiency and solve the problem of fossil fuels polluting the environment is a major challenge for the effective use of solar energy
②Using plants and crop by-products produced by plant photosynthesis to synthesize biofuels, such as converting corn into ethanol, is economical and environmentally friendly, but the cycle is long and the cost is high

Method used

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  • Molecular level iridium catalyst modified wo3 composite photoanode and its application
  • Molecular level iridium catalyst modified wo3 composite photoanode and its application
  • Molecular level iridium catalyst modified wo3 composite photoanode and its application

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Embodiment Construction

[0057] Example Molecular Level Iridium Catalyst Ir-PO 3 h 2 Modified WO 3composite photoanode

[0058] (1) Molecular level iridium catalyst Ir-PO 3 h 2 ([(H 4 dphbpy)Ir III Preparation of (Cp*)Cl]Cl)

[0059] 1. Preparation of 2,2'-bipyridine-4,4'-diethyl diphosphate

[0060] Under nitrogen protection, 4,4'-dibromo-2,2'-bipyridine (Br 2 bpy) (0.7850g, 0.5 mmol), Pd (pph 3 ) 4 (0.2500g, 0.5mmol), Et 3 N (0.7mL), diethyl phosphite (0.7mL), in 15.0mL of toluene, heated to reflux at 85°C for 4h, after the reaction was complete, cooled to room temperature, added diethyl ether to the reaction liquid, vacuum filtered, The precipitate was filtered off, the filtrate was concentrated by rotary evaporation, and then plated, and finally the product 2,2'-bipyridine-4,4'-bisphosphate diethyl was collected by silica gel column chromatography.

[0061] 1 H NMR (CH 3 OD, 295K, δ / ppm, J / Hz): 8.89 (m, 2H, H 3,3′ , J=2.0); 8.66 (d, 2H, H 6,6′ , J=9.0); 7.95 (ddd, 2H, H 5,5′ , J=1...

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Abstract

The invention relates to a WO3 composite photo-anode modified by a molecular-level iridium catalyst and an application thereof. According to the WO3 composite photo-anode, the inorganic semiconductor material, namely tungsten trioxide with visible-light response is served as photosensitizer, the molecular-level iridium catalyst [(H4dphbpy)Ir<III>(Cp*)Cl] Cl with stable structure is served as the catalyst, the single-layer catalyst is loaded on the substrate of tungsten trioxide by means of chemical adsorption, and the inorganic semiconductor / molecular catalyst (FTO / WO3 / Ir-PO3H2) composite photo-anode catalytic system is formed; and therefore the electron-hole recombination is effectively prevented, the charge transmission between an electrode / electrolyte interface is greatly accelerated, the charge separation efficiency and the interface reaction dynamics are improved, and the composite photo-anode catalyzes water oxidation to produce oxygen under the driving of visible light (lamda>400nm, 100mW / cm<2>).

Description

technical field [0001] The invention relates to a novel composite photoanode constructed by introducing a phosphoric acid group into a catalyst structure for group modification, and utilizing chemical adsorption to load an iridium catalyst on a semiconductor tungsten trioxide electrode as a photoanode. Background technique [0002] With the rapid development of society and economy, human's demand for energy is increasing day by day, and the influence and pollution of natural environment are gradually increasing. Energy crisis and environmental pollution have become a huge challenge for human survival and development. For a long time, the energy for industry and life has mainly come from fossil fuels, which are the foundation and driving force supporting the economic development of various countries. This increase in energy consumption can be met by a solar energy conversion: the sun irradiates about 10 22 J. From this, it can be concluded that the energy provided by the su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/04C25B11/06H01G9/20H01G9/042
CPCC25B1/04C25B1/55C25B11/051C25B11/075H01G9/2054Y02E10/542Y02E60/36
Inventor 夏立新童海丽姜毅张谦
Owner LIAONING UNIVERSITY
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