A robust and efficient visible light driven photocatalyst for hydrogen evolution based on ruthenium dye N3 covalently immobilized on reduced graphene oxide

Photocatalytic hydrogen (H2) production is a process that converts solar energy into chemical energy by means of a suitable photocatalyst. After the huge amount of systems that have been tested in the last forty years, the advent of nanotechnology and a careful design at molecular level, allow to obtain attractive activity, even using pure visible light. At the same time we are approaching reasonable photocatalyst stability in laboratory test, and the attention is paid to identify cost-effective photocatalysts that might find real applications. This Review provides a broad overview of the elementary steps of the heterogeneous photocatalytic H2 production, including an outline of the physico-chemical reactions occurring on semiconductors and cocatalysts. The use of different renewable oxygenates as sustainable sacrificial agent for the H2 production is outlined, in view of a transition from fossil fuels to pure water splitting. Finally, the recent advances in the development of photocatalyst are discussed focusing on the current progress in organic and hybrid organic/inorganic photocatalysts

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Photocatalytic Hydrogen Production: A Rift into the Future Energy Supply

Christoforidis

2017

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Photosynthetic‐Membrane‐Like Ion Translocation in Visible‐Light‐Harvesting Nanofluidic Channels

Nie,

Li,

Sun

et al. 2024

Small

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The selective uphill and downhill movement of protons in and out of photosynthetic membrane enabled by ion pumps and ion channels is key to photosynthesis. Reproducing the functions of photosynthetic membranes in artificial systems has been a persistent goal. Here, a visible‐light‐harvesting nanofluidic channels is reported which experimentally demonstrates the ion translocation functions of photosynthetic membranes. A molecular junction consisting of photosensitive ruthenium complexes linked to TiO2 electron acceptors forms the reaction centers in the nanofluidic channels. The visible‐light‐triggered vectorial electron injection into TiO2 establishes a difference in transmembrane potential across the channels, which enables uphill transport of ions against a 5‐fold concentration gradient. In addition, the asymmetric charge distribution across the channels enables the unidirectional downhill movement of ions, demonstrating an ion rectification effect with a ratio of 18:1. This work, for the first time, mimics both the uphill and downhill ion translocation functions of photosynthetic membranes, which lays a foundation for nanofluidic energy conversion.

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A D-π-A organic dye – Reduced graphene oxide covalent dyad as a new concept photosensitizer for light harvesting applications

Gatti

Manfredi

Boldrini

et al. 2017

Carbon

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A robust and efficient visible light driven photocatalyst for hydrogen evolution based on ruthenium dye N3 covalently immobilized on reduced graphene oxide

Abstract: A robust and efficient photocatalyst based on ruthenium dye N3 covalently immobilized on reduced graphene oxide was used for photocatalytic hydrogen evolution.

Cited by 7 publications

References 57 publications

Photocatalytic Hydrogen Production: A Rift into the Future Energy Supply

Photocatalytic Hydrogen Production: A Rift into the Future Energy Supply

Photosynthetic‐Membrane‐Like Ion Translocation in Visible‐Light‐Harvesting Nanofluidic Channels

A D-π-A organic dye – Reduced graphene oxide covalent dyad as a new concept photosensitizer for light harvesting applications

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