H2020Индивидуална стипендия2015–2017

RotaxHEC · Click to Lock: Mechanically Interlocked Architectures as Hydrogen Evolving Catalysts

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2015-10-03 → 2017-10-02
Финансиране от ЕС: 183 455 €
Участници: 1
Схема: MSCA-IF-EF-RI

Линиите свързват координатора с партньорите.

Накратко на български

Механично свързани молекули се изследват като по-стабилни катализатори за разделяне на водата до водород и кислород. Това помага за разработването на устойчиви и зелени източници на енергия, за да се задоволи нарастващото глобално търсене.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Click to Lock: Mechanically Interlocked Architectures as Hydrogen Evolving Catalysts

Context With the world population predicted to reach 11.2 billion by 2100, the global energy demand will inevitably likewise increase. The need for new sustainable and “green” sources of energy are as such an urgent requirement. Photocatalytic water splitting is an attractive solution for a number of reasons. To begin with solar power is an abundant resource and entirely renewable. Secondly, water is an abundant feed stock for this process, generating storable hydrogen and oxygen gas. The hydrogen evolution side of water splitting involves the reduction of protons to hydrogen gas. A number of catalysts have been developed for this purpose; combining these with a photosensitiser unit can generate photocatalytic systems. However, effective electron transfer is diffusion limited; attempts to enforce the proximity of these two species through connective coordination bonds have failed to produce especially more efficient catalysts. Dissociation of the photosensitisers and degradation of the hydrogen evolving catalysts (HECs) are the chief explanations for this. Mechanically interlocked molecules (MIMs) have recently emerged as novel ligands for coordination to metal ions. Early work by Sauvage and co-workers revealed that coordination complexes of catenane ligands can have quite different properties to their non-interlocked analogues, including increased stability due to the inability of the constituent ligand components to dissociate from one another. We propose that metal ion complexes of MIMs could thus be utilised as more stable HECs, due to both the enforced proximity of the ligand components, and protection of the metal centre from nucleophilic attack. Objectives My objective was to investigate MIM complexes as the HEC component of water splitting. To achieve my objectives I developed new chemistry to synthesise suitable MIMs and investigated their properties when combined with metal ions.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

Research towards the development of sustainable energy sources focusses on minimising our negative impact on the Earth. Towards this end investigations into the exploitation of solar power as a clean source of energy are active across multiple scientific disciplines. One approach is to utilise water splitting catalysts to generate oxygen and combustible hydrogen gas from water. This task is often split into the two halves of the problem: the oxygen evolving and hydrogen evolving sides.This project aims at the development of a new class of hydrogen evolving catalysts based on mechanically interlocked rotaxane architectures. The advantages of the proposed catalysts include mechanical protection of the catalytic centre, prevention of ligand dissociation by virtue of mechanical bonding, and assembly of the multi-component architecture in a single, rapid, high-yielding step.Initially rotaxane ligands will be synthesised using the synthetically flexible, convergent, active template (AT) methodology followed by examination of their coordination chemistry with abundant and cheap cobalt. Subsequently these structures will be assessed for their catalytic behaviour using electrochemical techniques, with structural optimisation utilised to improve their activity. We will then append photosensitising units to imbue these systems with photocatalytic activity.This MSCA would allow me to develop my skills as an independent scientist, both in terms of capitalising on the skill set during my studies in New Zealand, combined with gaining new knowledge and practical abilities, as well as enhancing my supervisory, teaching, and project management skills. Furthermore, having obtained my tertiary education (including Ph.D.) overseas, the action would facilitate my reintegration into the European scientific community and provide Europe with a highly skilled, independent scientist ready to take up the challenge of an independent research position.

Оригинален текст от CORDIS (на английски).

Участници

UNIVERSITY OF SOUTHAMPTON · SOUTHAMPTONКоординаторОбединеното кралство