2D-COF-WS · Designing and screening two dimensional covalent organic frameworks for effective water splitting
„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“
- Период
- 2017-04-01 → 2019-03-31
- Финансиране от ЕС
- 171 461 €
- Участници
- 2
- Схема
- MSCA-IF-EF-ST
Линиите свързват координатора с партньорите.
Накратко на български
Двуизмерните ковалентни органични рамки се изследват като материали за разцепване на водата до водород и кислород чрез слънчева светлина. Това помага за производството на водород като чист и възобновяем източник на енергия без вредни емисии.
Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.
Резултати накратко
Designing and screening two dimensional covalent organic frameworks for effective water splitting
Hydrogen fuel production has gained increased attention as oil and other nonrenewable fuels become increasingly depleted and expensive. Methods such as photocatalytic water splitting are being investigated to produce hydrogen, a clean-burning fuel. Water splitting holds particular promise since it utilizes water, an inexpensive renewable resource. Photocatalytic water splitting has the simplicity of using a powder in solution and sunlight to produce H2 and O2 from water and can provide a clean, renewable energy, without producing greenhouse gases or having many adverse effects on the atmosphere. Due to the high surface area and abundant active sites, 2D materials have shown high potentials for photocatalytic water splitting. A photocatalyst dedicated for water splitting requires some prerequisites for its electronic structure: the conduction band minimum (CBM) should be more positive than the potential of H2 evolution (H+/H2, -4.44 eV vs. vacuum) and the valence band maximum (VBM) more negative than the potential of O2 evolution (O2/H2O, -5.67 eV vs. vacuum) reaction, respectively. This condition has excluded most 2D semiconductors from being possible unassisted photocatalysts. Therefore, exploring stable 2D semiconductors with appropriate electronic and optical properties is demandable for developing effective photocatalytic water splitting. Among 2D structures, 2D covalent organic frameworks (COFs) are of specific promise for water splitting under solar irradiation. This is because 2D COFs possess porous structures with large surface area, high porosity and favourable open space for water oxidation and reduction and the ordered π systems can facilitate effective charge transports in the stacking direction. Meanwhile, the structural configurations and intrinsic properties of COFs can be experimentally controlled by using different organic building units and synthesizing approaches. However, many 2D COFs suffer from poor stabilities in aqueous solution. The structural, electronic and optical properties of 2D COFs can vary significantly with different compositions and lattices, which will determine the final photocatalytic performance of 2D COFs. Therefore, design and screen viable 2D COFs for effective water splitting requires in-depth fundamental research. The overall objective of this project is to design and screen potential 2D semiconductors that made of 2D COFs with extroadinary properties and utilize them for photocatalytic water splitting.
Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз
Цел на проекта
In order to mitigate the energy crisis and serious environmental pollution as well as global warming, the conversion of solar energy into chemical fuels including hydrogen has been extensively developed to flexibly and conveniently utilize this clean energy form. Generally, hydrogen can be produced via photocatalytic water splitting under sunlight irradiation. The efficiency of this solar driven process to synthesize hydrogen depends entirely on the selected semiconducting photocatalysts. Composed of light-weight elements and linked by strong covalent bonds, two dimensional (2D) covalent organic frameworks (COFs) are low-cost, low-toxic and promising catalytic materials that can facilitate the water splitting process under solar irradiation. However, the structural, electronic and optical properties of 2D COFs can vary significantly with different factors, which will determine the final photocatalytic performance of 2D COFs. Therefore, finding viable 2D COFs for effective water splitting requires extensive fundamental research. In this project, we will explore the feasibility of using 2D COFs for photocatalysis on the basis of comprehensive theoretical computations. Via collaborating with experimental researchers, deep insights will be generated for the design and synthesis of 2D COF photocatalysts. After understanding the intrinsic properties and photocatalytic properties of 2D COFs, we will effectively and significantly help to design and screen promising catalysts for water splitting and promote the development and application of green energy.
Оригинален текст от CORDIS (на английски).
Участници
Връзки
Данни: CORDIS, © Европейски съюз