Constructing Pd/ferroelectric Bi4Ti3O12 nanoflake interfaces for O2 activation and boosting NO photo-oxidation

Qian Zhang; Yuanyu Shi; Xianjin Shi; Tingting Huang; Shuncheng Lee; Yu Huang; Junji Cao

doi:10.1016/j.apcatb.2021.120876

Constructing Pd/ferroelectric Bi₄Ti₃O₁₂ nanoflake interfaces for O₂ activation and boosting NO photo-oxidation

Qian Zhang, Yuanyu Shi, Xianjin Shi, Tingting Huang, Shuncheng Lee, Yu Huang (Corresponding Author), Junji Cao (Corresponding Author)

Research output: Journal article publication › Journal article › Academic research › peer-review

34 Citations (Scopus)

Abstract

Photo-oxidative NO _x removal often encountered with sluggish charge carrier separation kinetics and poor selectivity. Herein, Pd/ferroelectric Bi ₄Ti ₃O ₁₂ nanoflakes (Pd/BTO NF) were constructed to investigate the photo-excited charge separation, O ₂ activation and the generated reactive oxygen species (ROS) in dictating NO removal. Results showed that the depolarization field of ferroelectric BTO NF significantly promoted bulk charge separation, leading to boosted NO removal reaction kinetics (10 times higher) for Pd/BTO NF comparing with Pd/TiO ₂. Revealed by electronic paramagnetic resonance and radical scavenging tests, it is observed that the primary O ₂ activation species differed among Pd, Ag and Pt supported BTO NF photocatalysts, which resulted in different selectivity. The underlying mechanism of NO photo-oxidative conversion pathway was studied by in situ diffuse reflectance infrared Fourier transform spectroscopy. This work illustrate that metal/ferroelectric interfaces can be tuned to obtain differing O ₂ activation species, and notable selectivity changes in photocatalysis mediated environmental remediation reactions.

Original language	English
Article number	120876
Journal	Applied Catalysis B: Environmental
Volume	302
DOIs	https://doi.org/10.1016/j.apcatb.2021.120876
Publication status	Published - Mar 2022

Keywords

Air pollution
Ferroelectric polarization
O activation
Perovskite nanomaterials
Photocatalysis

ASJC Scopus subject areas

Catalysis
General Environmental Science
Process Chemistry and Technology

More information

10.1016/j.apcatb.2021.120876

Cite this

@article{e50ff6f932714f0490407b65001aa60c,

title = "Constructing Pd/ferroelectric Bi4Ti3O12 nanoflake interfaces for O2 activation and boosting NO photo-oxidation",

abstract = "Photo-oxidative NO x removal often encountered with sluggish charge carrier separation kinetics and poor selectivity. Herein, Pd/ferroelectric Bi 4Ti 3O 12 nanoflakes (Pd/BTO NF) were constructed to investigate the photo-excited charge separation, O 2 activation and the generated reactive oxygen species (ROS) in dictating NO removal. Results showed that the depolarization field of ferroelectric BTO NF significantly promoted bulk charge separation, leading to boosted NO removal reaction kinetics (10 times higher) for Pd/BTO NF comparing with Pd/TiO 2. Revealed by electronic paramagnetic resonance and radical scavenging tests, it is observed that the primary O 2 activation species differed among Pd, Ag and Pt supported BTO NF photocatalysts, which resulted in different selectivity. The underlying mechanism of NO photo-oxidative conversion pathway was studied by in situ diffuse reflectance infrared Fourier transform spectroscopy. This work illustrate that metal/ferroelectric interfaces can be tuned to obtain differing O 2 activation species, and notable selectivity changes in photocatalysis mediated environmental remediation reactions.",

keywords = "Air pollution, Ferroelectric polarization, O activation, Perovskite nanomaterials, Photocatalysis",

author = "Qian Zhang and Yuanyu Shi and Xianjin Shi and Tingting Huang and Shuncheng Lee and Yu Huang and Junji Cao",

note = "Funding Information: Q. Zhang gratefully acknowledges the National Key Research and Development Program of China ( 2016YFA0203000 ), the funding from the National Natural Science Foundation of China (Grant No. 21707142 ), the Youth Innovation Promotion Association ( 2021413 ) and the West Light Foundation ( XAB2018B06 ) of the Chinese Academy of Sciences for the support. Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

year = "2022",

month = mar,

doi = "10.1016/j.apcatb.2021.120876",

language = "English",

volume = "302",

journal = "Applied Catalysis B: Environmental",

issn = "0926-3373",

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T1 - Constructing Pd/ferroelectric Bi4Ti3O12 nanoflake interfaces for O2 activation and boosting NO photo-oxidation

AU - Zhang, Qian

AU - Shi, Yuanyu

AU - Shi, Xianjin

AU - Huang, Tingting

AU - Lee, Shuncheng

AU - Huang, Yu

AU - Cao, Junji

N1 - Funding Information: Q. Zhang gratefully acknowledges the National Key Research and Development Program of China ( 2016YFA0203000 ), the funding from the National Natural Science Foundation of China (Grant No. 21707142 ), the Youth Innovation Promotion Association ( 2021413 ) and the West Light Foundation ( XAB2018B06 ) of the Chinese Academy of Sciences for the support. Publisher Copyright: © 2021 Elsevier B.V.

PY - 2022/3

Y1 - 2022/3

N2 - Photo-oxidative NO x removal often encountered with sluggish charge carrier separation kinetics and poor selectivity. Herein, Pd/ferroelectric Bi 4Ti 3O 12 nanoflakes (Pd/BTO NF) were constructed to investigate the photo-excited charge separation, O 2 activation and the generated reactive oxygen species (ROS) in dictating NO removal. Results showed that the depolarization field of ferroelectric BTO NF significantly promoted bulk charge separation, leading to boosted NO removal reaction kinetics (10 times higher) for Pd/BTO NF comparing with Pd/TiO 2. Revealed by electronic paramagnetic resonance and radical scavenging tests, it is observed that the primary O 2 activation species differed among Pd, Ag and Pt supported BTO NF photocatalysts, which resulted in different selectivity. The underlying mechanism of NO photo-oxidative conversion pathway was studied by in situ diffuse reflectance infrared Fourier transform spectroscopy. This work illustrate that metal/ferroelectric interfaces can be tuned to obtain differing O 2 activation species, and notable selectivity changes in photocatalysis mediated environmental remediation reactions.

AB - Photo-oxidative NO x removal often encountered with sluggish charge carrier separation kinetics and poor selectivity. Herein, Pd/ferroelectric Bi 4Ti 3O 12 nanoflakes (Pd/BTO NF) were constructed to investigate the photo-excited charge separation, O 2 activation and the generated reactive oxygen species (ROS) in dictating NO removal. Results showed that the depolarization field of ferroelectric BTO NF significantly promoted bulk charge separation, leading to boosted NO removal reaction kinetics (10 times higher) for Pd/BTO NF comparing with Pd/TiO 2. Revealed by electronic paramagnetic resonance and radical scavenging tests, it is observed that the primary O 2 activation species differed among Pd, Ag and Pt supported BTO NF photocatalysts, which resulted in different selectivity. The underlying mechanism of NO photo-oxidative conversion pathway was studied by in situ diffuse reflectance infrared Fourier transform spectroscopy. This work illustrate that metal/ferroelectric interfaces can be tuned to obtain differing O 2 activation species, and notable selectivity changes in photocatalysis mediated environmental remediation reactions.

KW - Air pollution

KW - Ferroelectric polarization

KW - O activation

KW - Perovskite nanomaterials

KW - Photocatalysis

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