Abstract
There has been much interest recently in the discovery of new, non-oxide materials for photoelectrochemical applications. The copper hydroxyphosphate mineral libethenite, Cu2(OH)PO4 (CHP), which has a Jahn-Teller distorted structure and d9 electron configuration, has recently been reported to display photocatalytic activity. To better understand the properties of this material, a detailed investigation of the relevant fundamental characteristics such as the flatband potential, conduction type, and band diagram was performed using electrochemical and photoelectrochemical methods on CHP thin films deposited onto fluorine-doped tin oxide (FTO) substrates. Density functional theory was used to calculate the band structure, effective mass of electrons and holes, and vacancy formation energies in CHP. CHP was found to be active for electrochemical water oxidation, as confirmed by quantitative O2 measurements. Possible factors behind the low photocurrents observed in linear scanning voltammetry are discussed. Better understanding of this material may lead to the development of improved catalysts and photocatalysts from natural mineral sources.
| Original language | English |
|---|---|
| Pages (from-to) | 663-672 |
| Number of pages | 10 |
| Journal | ChemElectroChem |
| Volume | 1 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Mar 1 2014 |
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Keywords
- Copper hydroxyphosphate
- Photocatalysis
- Photoelectrochemistry
- Thin films
- Water oxidation
ASJC Scopus subject areas
- Electrochemistry
- Catalysis
Cite this
Electrochemical and Photoelectrochemical Properties of the Copper Hydroxyphosphate Mineral Libethenite. / Li, Man; Cheng, Qian; Wittman, Reed M.; Peng, Xihong; Chan, Candace.
In: ChemElectroChem, Vol. 1, No. 3, 01.03.2014, p. 663-672.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electrochemical and Photoelectrochemical Properties of the Copper Hydroxyphosphate Mineral Libethenite
AU - Li, Man
AU - Cheng, Qian
AU - Wittman, Reed M.
AU - Peng, Xihong
AU - Chan, Candace
PY - 2014/3/1
Y1 - 2014/3/1
N2 - There has been much interest recently in the discovery of new, non-oxide materials for photoelectrochemical applications. The copper hydroxyphosphate mineral libethenite, Cu2(OH)PO4 (CHP), which has a Jahn-Teller distorted structure and d9 electron configuration, has recently been reported to display photocatalytic activity. To better understand the properties of this material, a detailed investigation of the relevant fundamental characteristics such as the flatband potential, conduction type, and band diagram was performed using electrochemical and photoelectrochemical methods on CHP thin films deposited onto fluorine-doped tin oxide (FTO) substrates. Density functional theory was used to calculate the band structure, effective mass of electrons and holes, and vacancy formation energies in CHP. CHP was found to be active for electrochemical water oxidation, as confirmed by quantitative O2 measurements. Possible factors behind the low photocurrents observed in linear scanning voltammetry are discussed. Better understanding of this material may lead to the development of improved catalysts and photocatalysts from natural mineral sources.
AB - There has been much interest recently in the discovery of new, non-oxide materials for photoelectrochemical applications. The copper hydroxyphosphate mineral libethenite, Cu2(OH)PO4 (CHP), which has a Jahn-Teller distorted structure and d9 electron configuration, has recently been reported to display photocatalytic activity. To better understand the properties of this material, a detailed investigation of the relevant fundamental characteristics such as the flatband potential, conduction type, and band diagram was performed using electrochemical and photoelectrochemical methods on CHP thin films deposited onto fluorine-doped tin oxide (FTO) substrates. Density functional theory was used to calculate the band structure, effective mass of electrons and holes, and vacancy formation energies in CHP. CHP was found to be active for electrochemical water oxidation, as confirmed by quantitative O2 measurements. Possible factors behind the low photocurrents observed in linear scanning voltammetry are discussed. Better understanding of this material may lead to the development of improved catalysts and photocatalysts from natural mineral sources.
KW - Copper hydroxyphosphate
KW - Photocatalysis
KW - Photoelectrochemistry
KW - Thin films
KW - Water oxidation
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U2 - 10.1002/celc.201300046
DO - 10.1002/celc.201300046
M3 - Article
VL - 1
SP - 663
EP - 672
JO - ChemElectroChem
JF - ChemElectroChem
SN - 2196-0216
IS - 3
ER -