TY - JOUR
T1 - Eliciting the contribution of TiN to photoelectrochemical performance enhancement of Imma-LaTiO2N at neutral pH
AU - Hojamberdiev, Mirabbos
AU - Mora-Hernandez, Juan Manuel
AU - Vargas, Ronald
AU - Heppke, Eva Maria
AU - Yubuta, Kunio
AU - Yamakata, Akira
AU - Kadirova, Zukhra
AU - Torres-Martínez, Leticia
AU - Teshima, Katsuya
AU - Lerch, Martin
N1 - Funding Information:
The authors would like to thank Dr. Stefan Berendts, Dr. Ina Remy-Speckmann, and Ms. Christina Eichenauer from Institut für Chemie, TU Berlin, Dipl. Phys. Christoph Fahrenson and Jan Simke from ZELMI, TU Berlin, Dr. Kosaku Kato from Toyota Technological Institute, and Ms. Reiko Shiozawa from Shinshu University for O/N, X-ray diffraction, N2 physisorption, SEM-EDX, TEM, TAS, and XPS analyses, respectively. This project has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement no. 793882.
Funding Information:
The authors would like to thank Dr. Stefan Berendts, Dr. Ina Remy-Speckmann, and Ms. Christina Eichenauer from Institut für Chemie, TU Berlin, Dipl. Phys. Christoph Fahrenson and Jan Simke from ZELMI, TU Berlin, Dr. Kosaku Kato from Toyota Technological Institute, and Ms. Reiko Shiozawa from Shinshu University for O/N, X-ray diffraction, N 2 physisorption, SEM-EDX, TEM, TAS, and XPS analyses, respectively. This project has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement no. 793882.
Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/7
Y1 - 2022/7
N2 - The presence of defects, which act as the recombination hubs for photogenerated charge carriers, hinders the improvement of photocatalytic activity for oxygen evolution reaction of LaTiO2N under visible light irradiation via a four-electron-transfer reaction pathway. Here, we involve titanium nitride (TiN) in a varying content (0–17.8%) to improve the efficiency of charge separation and transport, influencing the photoelectrochemical performance of LaTiO2N. The characterization results confirm the formation of a strong contact between orthorhombic-LaTiO2N and cubic-TiN particles. The photoelectrochemical (PEC) measurements reveal the inverse dependence between electron transfer phenomena and charge carrier recombination, which allows to understand the trend when modifying LaTiO2N with TiN. In fact, the incorporation of 17.8% TiN in the LaTiO2N:TiN material results in a higher photocurrent. Open-circuit potential (OCP) decay and transient absorption spectroscopy (TAS) studies confirm longer lifetimes of charge carriers for increasing amounts of TiN in the synthesized materials. Thus, the main role of TiN is to improve the properties of the semiconductor-electrolyte interface, having verified its impact on the separation and transport of photogenerated charge carriers. Furthermore, computational studies predict that the adsorption of water molecules is favored at the LaTiO2N:TiN surface compared to the individual TiN and LaTiO2N surfaces.
AB - The presence of defects, which act as the recombination hubs for photogenerated charge carriers, hinders the improvement of photocatalytic activity for oxygen evolution reaction of LaTiO2N under visible light irradiation via a four-electron-transfer reaction pathway. Here, we involve titanium nitride (TiN) in a varying content (0–17.8%) to improve the efficiency of charge separation and transport, influencing the photoelectrochemical performance of LaTiO2N. The characterization results confirm the formation of a strong contact between orthorhombic-LaTiO2N and cubic-TiN particles. The photoelectrochemical (PEC) measurements reveal the inverse dependence between electron transfer phenomena and charge carrier recombination, which allows to understand the trend when modifying LaTiO2N with TiN. In fact, the incorporation of 17.8% TiN in the LaTiO2N:TiN material results in a higher photocurrent. Open-circuit potential (OCP) decay and transient absorption spectroscopy (TAS) studies confirm longer lifetimes of charge carriers for increasing amounts of TiN in the synthesized materials. Thus, the main role of TiN is to improve the properties of the semiconductor-electrolyte interface, having verified its impact on the separation and transport of photogenerated charge carriers. Furthermore, computational studies predict that the adsorption of water molecules is favored at the LaTiO2N:TiN surface compared to the individual TiN and LaTiO2N surfaces.
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U2 - 10.1016/j.mtener.2022.101053
DO - 10.1016/j.mtener.2022.101053
M3 - Article
AN - SCOPUS:85132418468
SN - 2468-6069
VL - 27
JO - Materials Today Energy
JF - Materials Today Energy
M1 - 101053
ER -
