Hot-electron transfer from the semiconductor domain to the metal domain in CdSe@CdS{Au} nano-heterostructures

Herein, we investigated that sheet-like TiO2mesocrystals with controllable nanothorns on the {101} facet during the topotactic transformation exhibit facet-induced charge separation and anisotropic electron flow, realizing the superior facet-dependent photocatalysis in solar energy conversion.

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Ultrafast Electron Transfer from CdSe Quantum Dots to a [FeFe]-Hydrogenase Mimic

10.26434/chemrxiv.14333582.v1 ◽

2021 ◽

Author(s):

Alexander Schleusener ◽

Mathias Micheel ◽

Stefan Benndorf ◽

Markus Rettenmayr ◽

Wolfgang Weigand ◽

...

Keyword(s):

Quantum Dots ◽

Electron Transfer ◽

Charge Separation ◽

Hydrogen Generation ◽

Cdse Quantum Dots ◽

Hot Electron ◽

Time Resolved ◽

Transfer Processes ◽

Sacrificial Agent ◽

Hot Electron Transfer

The combination of CdSe nanoparticles as photosensitizers and [FeFe]-hydrogenase mimics is known to result in efficient systems for light-driven hydrogen generation. Nevertheless, little is known about the details of the light-induced charge-transfer processes. Here we investigate the timescale of light-induced electron transfer between CdSe quantum dots and a simple [FeFe]-hydrogenase mimic adsorbed on the surface of the quantum dot under non-catalytic conditions. Our time-resolved spectroscopic investigation shows that hot electron transfer on a sub-ps timescale and band-edge electron transfer on a sub-10-ps timescale occurs. Fast recombination is observed in the absence of a sacrificial agent or protons, which under real catalytic conditions would quench remaining holes or could stabilize the charge separation. <br>

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Ultrafast Electron Transfer from CdSe Quantum Dots to a [FeFe]-Hydrogenase Mimic

10.26434/chemrxiv.14333582 ◽

2021 ◽

Author(s):

Alexander Schleusener ◽

Mathias Micheel ◽

Stefan Benndorf ◽

Markus Rettenmayr ◽

Wolfgang Weigand ◽

...

Keyword(s):

Quantum Dots ◽

Electron Transfer ◽

Charge Separation ◽

Hydrogen Generation ◽

Cdse Quantum Dots ◽

Hot Electron ◽

Time Resolved ◽

Transfer Processes ◽

Sacrificial Agent ◽

Hot Electron Transfer

The combination of CdSe nanoparticles as photosensitizers and [FeFe]-hydrogenase mimics is known to result in efficient systems for light-driven hydrogen generation. Nevertheless, little is known about the details of the light-induced charge-transfer processes. Here we investigate the timescale of light-induced electron transfer between CdSe quantum dots and a simple [FeFe]-hydrogenase mimic adsorbed on the surface of the quantum dot under non-catalytic conditions. Our time-resolved spectroscopic investigation shows that hot electron transfer on a sub-ps timescale and band-edge electron transfer on a sub-10-ps timescale occurs. Fast recombination is observed in the absence of a sacrificial agent or protons, which under real catalytic conditions would quench remaining holes or could stabilize the charge separation. <br>

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Electron transfer and exciplex chemistry of functionalized nanocarbons: effects of electronic coupling and donor dimerization

Nanoscale Horizons ◽

10.1039/c8nh00024g ◽

2018 ◽

Vol 3 (4) ◽

pp. 352-366 ◽

Cited By ~ 13

Author(s):

Tomokazu Umeyama ◽

Hiroshi Imahori

Keyword(s):

Electron Transfer ◽

Solar Energy ◽

Energy Conversion ◽

Charge Separation ◽

Artificial Photosynthesis ◽

Solar Energy Conversion ◽

Electronic Coupling ◽

The Past ◽

Photoinduced Charge Separation ◽

Photoinduced Charge

In the past few decades, research on the construction of donor–bridge–acceptor linked systems capable of efficient photoinduced charge separation has fundamentally contributed to the fields of artificial photosynthesis and solar energy conversion.

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