Publication

Heptacoordinate Co-II Complex: A New Architecture for Photochemical Hydrogen Production

Euro Solari, Albert Ruggi
2017
Journal Articles

Abstract

The first heptacoordinate cobalt catalyst for light-driven hydrogen production in water has been synthesized and characterized. Photochemical experiments using Ru(bpy)(3) as photosensitizer gave a turnover number (TON) of 16300molH(2)(molcat.)(-1) achieved in 2hours of irradiation with visible (475nm) light. This promising result provides a path forward in the development of new structures to improve the efficiency of the catalysis.

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https://infoscience.epfl.ch/entities/publication/a7428adb-efb3-448d-b7a7-fbe43a2fe856

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Euro Solari, Albert Ruggi
2017
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/a7428adb-efb3-448d-b7a7-fbe43a2fe856

About this result

Related concepts (18)

Photocatalytic water splitting

Photocatalytic water splitting is a process that uses photocatalysis for the dissociation of water (H2O) into hydrogen (H2) and oxygen (O2). Only light energy (photons), water, and a catalyst(s) are needed, since this is what naturally occurs in natural photosynthetic oxygen production and CO2 fixation. Photocatalytic water splitting is done by dispersing photocatalyst particles in water or depositing them on a substrate, unlike Photoelectrochemical cell, which are assembled into a cell with a photoelectrode.

Photochemistry

Photochemistry is the branch of chemistry concerned with the chemical effects of light. Generally, this term is used to describe a chemical reaction caused by absorption of ultraviolet (wavelength from 100 to 400 nm), visible light (400–750 nm) or infrared radiation (750–2500 nm). In nature, photochemistry is of immense importance as it is the basis of photosynthesis, vision, and the formation of vitamin D with sunlight. It is also responsible for the appearance of DNA mutations leading to skin cancers.

Green hydrogen

Green hydrogen (GH2 or GH2) is hydrogen generated by renewable energy or from low-carbon power. Green hydrogen has significantly lower carbon emissions than grey hydrogen, which is derived from fossil fuels without carbon capture. Green hydrogen may be used to decarbonize sectors that are hard to electrify, such as cement and iron production. Green hydrogen can be used to produce green ammonia, the main constituent of synthetic fertilizer. It can also be used for long-duration grid energy storage, and for long-duration seasonal energy storage.

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Heptacoordinate Co-II Complex: A New Architecture for Photochemical Hydrogen Production

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