Hole scavenger redox potentials determine quantum efficiency and stability of Pt-decorated CdS nanorods for photocatalytic hydrogen generation

Maximilian J. Berr; Peter Wagner; Stefan Fischbach; Aleksandar Vaneski; Julian Schneider; Andrei S. Susha; Andrey L. Rogach; Frank Jäckel; Jochen Feldmann

doi:10.1063/1.4723575

Hole scavenger redox potentials determine quantum efficiency and stability of Pt-decorated CdS nanorods for photocatalytic hydrogen generation

Maximilian J. Berr, Peter Wagner, Stefan Fischbach, Aleksandar Vaneski, Julian Schneider, Andrei S. Susha, Andrey L. Rogach, Frank Jäckel, Jochen Feldmann

Centre for Functional Photonics

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

212 Citations (Scopus)

Abstract

We use Pt-decorated CdS nanorods for photocatalytic hydrogen generation in the presence of sacrificial hole scavengers. Both the quantum efficiency for hydrogen generation and the stability of the colloidal nanocrystals in solution improve with increasing redox potential of the hole scavenger. The higher redox potential leads to faster hole scavenging, which increases quantum efficiency and stability since electron hole recombination and oxidation of the CdS become less important. The quantum efficiencies can be tuned over more than an order of magnitude. This finding is important for choosing hole scavengers and for comparing efficiencies and stabilities for different photocatalytic nanosystems. © 2012 American Institute of Physics.

Original language	English
Article number	223903
Journal	Applied Physics Letters
Volume	100
Issue number	22
DOIs	https://doi.org/10.1063/1.4723575
Publication status	Published - 28 May 2012

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@article{e5380f05726e4a9889854598021a1488,

title = "Hole scavenger redox potentials determine quantum efficiency and stability of Pt-decorated CdS nanorods for photocatalytic hydrogen generation",

abstract = "We use Pt-decorated CdS nanorods for photocatalytic hydrogen generation in the presence of sacrificial hole scavengers. Both the quantum efficiency for hydrogen generation and the stability of the colloidal nanocrystals in solution improve with increasing redox potential of the hole scavenger. The higher redox potential leads to faster hole scavenging, which increases quantum efficiency and stability since electron hole recombination and oxidation of the CdS become less important. The quantum efficiencies can be tuned over more than an order of magnitude. This finding is important for choosing hole scavengers and for comparing efficiencies and stabilities for different photocatalytic nanosystems. {\textcopyright} 2012 American Institute of Physics.",

author = "Berr, {Maximilian J.} and Peter Wagner and Stefan Fischbach and Aleksandar Vaneski and Julian Schneider and Susha, {Andrei S.} and Rogach, {Andrey L.} and Frank J{\"a}ckel and Jochen Feldmann",

year = "2012",

month = may,

day = "28",

doi = "10.1063/1.4723575",

language = "English",

volume = "100",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

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}

Hole scavenger redox potentials determine quantum efficiency and stability of Pt-decorated CdS nanorods for photocatalytic hydrogen generation. / Berr, Maximilian J.; Wagner, Peter; Fischbach, Stefan et al.
In: Applied Physics Letters, Vol. 100, No. 22, 223903, 28.05.2012.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

TY - JOUR

T1 - Hole scavenger redox potentials determine quantum efficiency and stability of Pt-decorated CdS nanorods for photocatalytic hydrogen generation

AU - Berr, Maximilian J.

AU - Wagner, Peter

AU - Fischbach, Stefan

AU - Vaneski, Aleksandar

AU - Schneider, Julian

AU - Susha, Andrei S.

AU - Rogach, Andrey L.

AU - Jäckel, Frank

AU - Feldmann, Jochen

PY - 2012/5/28

Y1 - 2012/5/28

N2 - We use Pt-decorated CdS nanorods for photocatalytic hydrogen generation in the presence of sacrificial hole scavengers. Both the quantum efficiency for hydrogen generation and the stability of the colloidal nanocrystals in solution improve with increasing redox potential of the hole scavenger. The higher redox potential leads to faster hole scavenging, which increases quantum efficiency and stability since electron hole recombination and oxidation of the CdS become less important. The quantum efficiencies can be tuned over more than an order of magnitude. This finding is important for choosing hole scavengers and for comparing efficiencies and stabilities for different photocatalytic nanosystems. © 2012 American Institute of Physics.

AB - We use Pt-decorated CdS nanorods for photocatalytic hydrogen generation in the presence of sacrificial hole scavengers. Both the quantum efficiency for hydrogen generation and the stability of the colloidal nanocrystals in solution improve with increasing redox potential of the hole scavenger. The higher redox potential leads to faster hole scavenging, which increases quantum efficiency and stability since electron hole recombination and oxidation of the CdS become less important. The quantum efficiencies can be tuned over more than an order of magnitude. This finding is important for choosing hole scavengers and for comparing efficiencies and stabilities for different photocatalytic nanosystems. © 2012 American Institute of Physics.

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U2 - 10.1063/1.4723575

DO - 10.1063/1.4723575

M3 - RGC 21 - Publication in refereed journal

SN - 0003-6951

VL - 100

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 22

M1 - 223903

ER -

Hole scavenger redox potentials determine quantum efficiency and stability of Pt-decorated CdS nanorods for photocatalytic hydrogen generation

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