Operando Analyses of Solar Fuels Light Absorbers and Catalysts

Hans Joachim Lewerenz, Michael F. Lichterman, Matthias H. Richter, Ethan J. Crumlin, Shu Hu, Stephanus Axnanda, Marco Favaro, Walter Drisdell, Zahid Hussain, Bruce S. Brunschwig, Zhi Liu, Anders Nilsson, Alexis T. Bell, Nathan S Lewis, Daniel Friebel

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Operando synchrotron radiation photoelectron spectroscopy in the tender X-ray energy range has been used to obtain information on the energy-band relations of semiconductor and metal-covered semiconductor surfaces while in direct contact with aqueous electrolytes under potentiostatic control. The system that was investigated consists of highly doped Si substrates that were conformally coated with ∼70 nm titania films produced by atomic-layer deposition. TiO2/electrolyte and Si/TiO2/Ni/electrolyte interfaces were then analyzed by synchrotron radiation photoelectron spectroscopy. The PES data allows for determination of the flat-band position and identification of potential regions in which Fermi level pinning, depletion, or accumulation occurred. Operando X-ray absorption spectroscopy (XAS) techniques were additionally used to investigate the properties of heterogeneous electrocatalysts for the oxygen-evolution reaction. Operando XAS including the pre-edge, edge and EXAFS regions allowed the development of a detailed picture of the catalysts under operating conditions, and elucidated the changes in the physical and electronic structure of the catalyst that accompanied increases in the applied potential. Specifically, XAS data, combined with DFT studies, indicated that the activity of the electrocatalyst correlated with the formation of Fe dopant sites in γ-NiOOH.

Original languageEnglish
Pages (from-to)711-719
Number of pages9
JournalElectrochimica Acta
Volume211
DOIs
Publication statusPublished - Sep 1 2016

Fingerprint

X ray absorption spectroscopy
Electrolytes
Electrocatalysts
Photoelectron spectroscopy
Synchrotron radiation
Catalysts
Semiconductor materials
Atomic layer deposition
Fermi level
Discrete Fourier transforms
Band structure
Electronic structure
Titanium
Metals
Doping (additives)
Oxygen
X rays
Substrates

Keywords

  • artificial photosynthesis
  • Catalysis
  • operando spectroscopy
  • Protection
  • Semiconductors

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

Cite this

Lewerenz, H. J., Lichterman, M. F., Richter, M. H., Crumlin, E. J., Hu, S., Axnanda, S., ... Friebel, D. (2016). Operando Analyses of Solar Fuels Light Absorbers and Catalysts. Electrochimica Acta, 211, 711-719. https://doi.org/10.1016/j.electacta.2016.06.006

Operando Analyses of Solar Fuels Light Absorbers and Catalysts. / Lewerenz, Hans Joachim; Lichterman, Michael F.; Richter, Matthias H.; Crumlin, Ethan J.; Hu, Shu; Axnanda, Stephanus; Favaro, Marco; Drisdell, Walter; Hussain, Zahid; Brunschwig, Bruce S.; Liu, Zhi; Nilsson, Anders; Bell, Alexis T.; Lewis, Nathan S; Friebel, Daniel.

In: Electrochimica Acta, Vol. 211, 01.09.2016, p. 711-719.

Research output: Contribution to journalArticle

Lewerenz, HJ, Lichterman, MF, Richter, MH, Crumlin, EJ, Hu, S, Axnanda, S, Favaro, M, Drisdell, W, Hussain, Z, Brunschwig, BS, Liu, Z, Nilsson, A, Bell, AT, Lewis, NS & Friebel, D 2016, 'Operando Analyses of Solar Fuels Light Absorbers and Catalysts', Electrochimica Acta, vol. 211, pp. 711-719. https://doi.org/10.1016/j.electacta.2016.06.006
Lewerenz HJ, Lichterman MF, Richter MH, Crumlin EJ, Hu S, Axnanda S et al. Operando Analyses of Solar Fuels Light Absorbers and Catalysts. Electrochimica Acta. 2016 Sep 1;211:711-719. https://doi.org/10.1016/j.electacta.2016.06.006
Lewerenz, Hans Joachim ; Lichterman, Michael F. ; Richter, Matthias H. ; Crumlin, Ethan J. ; Hu, Shu ; Axnanda, Stephanus ; Favaro, Marco ; Drisdell, Walter ; Hussain, Zahid ; Brunschwig, Bruce S. ; Liu, Zhi ; Nilsson, Anders ; Bell, Alexis T. ; Lewis, Nathan S ; Friebel, Daniel. / Operando Analyses of Solar Fuels Light Absorbers and Catalysts. In: Electrochimica Acta. 2016 ; Vol. 211. pp. 711-719.
@article{166f81d583b548998c4bcc5e83f384e1,
title = "Operando Analyses of Solar Fuels Light Absorbers and Catalysts",
abstract = "Operando synchrotron radiation photoelectron spectroscopy in the tender X-ray energy range has been used to obtain information on the energy-band relations of semiconductor and metal-covered semiconductor surfaces while in direct contact with aqueous electrolytes under potentiostatic control. The system that was investigated consists of highly doped Si substrates that were conformally coated with ∼70 nm titania films produced by atomic-layer deposition. TiO2/electrolyte and Si/TiO2/Ni/electrolyte interfaces were then analyzed by synchrotron radiation photoelectron spectroscopy. The PES data allows for determination of the flat-band position and identification of potential regions in which Fermi level pinning, depletion, or accumulation occurred. Operando X-ray absorption spectroscopy (XAS) techniques were additionally used to investigate the properties of heterogeneous electrocatalysts for the oxygen-evolution reaction. Operando XAS including the pre-edge, edge and EXAFS regions allowed the development of a detailed picture of the catalysts under operating conditions, and elucidated the changes in the physical and electronic structure of the catalyst that accompanied increases in the applied potential. Specifically, XAS data, combined with DFT studies, indicated that the activity of the electrocatalyst correlated with the formation of Fe dopant sites in γ-NiOOH.",
keywords = "artificial photosynthesis, Catalysis, operando spectroscopy, Protection, Semiconductors",
author = "Lewerenz, {Hans Joachim} and Lichterman, {Michael F.} and Richter, {Matthias H.} and Crumlin, {Ethan J.} and Shu Hu and Stephanus Axnanda and Marco Favaro and Walter Drisdell and Zahid Hussain and Brunschwig, {Bruce S.} and Zhi Liu and Anders Nilsson and Bell, {Alexis T.} and Lewis, {Nathan S} and Daniel Friebel",
year = "2016",
month = "9",
day = "1",
doi = "10.1016/j.electacta.2016.06.006",
language = "English",
volume = "211",
pages = "711--719",
journal = "Electrochimica Acta",
issn = "0013-4686",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Operando Analyses of Solar Fuels Light Absorbers and Catalysts

AU - Lewerenz, Hans Joachim

AU - Lichterman, Michael F.

AU - Richter, Matthias H.

AU - Crumlin, Ethan J.

AU - Hu, Shu

AU - Axnanda, Stephanus

AU - Favaro, Marco

AU - Drisdell, Walter

AU - Hussain, Zahid

AU - Brunschwig, Bruce S.

AU - Liu, Zhi

AU - Nilsson, Anders

AU - Bell, Alexis T.

AU - Lewis, Nathan S

AU - Friebel, Daniel

PY - 2016/9/1

Y1 - 2016/9/1

N2 - Operando synchrotron radiation photoelectron spectroscopy in the tender X-ray energy range has been used to obtain information on the energy-band relations of semiconductor and metal-covered semiconductor surfaces while in direct contact with aqueous electrolytes under potentiostatic control. The system that was investigated consists of highly doped Si substrates that were conformally coated with ∼70 nm titania films produced by atomic-layer deposition. TiO2/electrolyte and Si/TiO2/Ni/electrolyte interfaces were then analyzed by synchrotron radiation photoelectron spectroscopy. The PES data allows for determination of the flat-band position and identification of potential regions in which Fermi level pinning, depletion, or accumulation occurred. Operando X-ray absorption spectroscopy (XAS) techniques were additionally used to investigate the properties of heterogeneous electrocatalysts for the oxygen-evolution reaction. Operando XAS including the pre-edge, edge and EXAFS regions allowed the development of a detailed picture of the catalysts under operating conditions, and elucidated the changes in the physical and electronic structure of the catalyst that accompanied increases in the applied potential. Specifically, XAS data, combined with DFT studies, indicated that the activity of the electrocatalyst correlated with the formation of Fe dopant sites in γ-NiOOH.

AB - Operando synchrotron radiation photoelectron spectroscopy in the tender X-ray energy range has been used to obtain information on the energy-band relations of semiconductor and metal-covered semiconductor surfaces while in direct contact with aqueous electrolytes under potentiostatic control. The system that was investigated consists of highly doped Si substrates that were conformally coated with ∼70 nm titania films produced by atomic-layer deposition. TiO2/electrolyte and Si/TiO2/Ni/electrolyte interfaces were then analyzed by synchrotron radiation photoelectron spectroscopy. The PES data allows for determination of the flat-band position and identification of potential regions in which Fermi level pinning, depletion, or accumulation occurred. Operando X-ray absorption spectroscopy (XAS) techniques were additionally used to investigate the properties of heterogeneous electrocatalysts for the oxygen-evolution reaction. Operando XAS including the pre-edge, edge and EXAFS regions allowed the development of a detailed picture of the catalysts under operating conditions, and elucidated the changes in the physical and electronic structure of the catalyst that accompanied increases in the applied potential. Specifically, XAS data, combined with DFT studies, indicated that the activity of the electrocatalyst correlated with the formation of Fe dopant sites in γ-NiOOH.

KW - artificial photosynthesis

KW - Catalysis

KW - operando spectroscopy

KW - Protection

KW - Semiconductors

UR - http://www.scopus.com/inward/record.url?scp=84976593919&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84976593919&partnerID=8YFLogxK

U2 - 10.1016/j.electacta.2016.06.006

DO - 10.1016/j.electacta.2016.06.006

M3 - Article

AN - SCOPUS:84976593919

VL - 211

SP - 711

EP - 719

JO - Electrochimica Acta

JF - Electrochimica Acta

SN - 0013-4686

ER -