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; Jun ji 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
, Jun ji Cao

School of Human Settlements and Civil Engineering

Research output: Contribution to journal › Article › peer-review

46 Scopus citations

Abstract

Photo-oxidative NO_x removal often encountered with sluggish charge carrier separation kinetics and poor selectivity. Herein, Pd/ferroelectric Bi₄Ti₃O₁₂ nanoflakes (Pd/BTO NF) were constructed to investigate the photo-excited charge separation, O₂ 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/TiO₂. Revealed by electronic paramagnetic resonance and radical scavenging tests, it is observed that the primary O₂ 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 O₂ 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
State	Published - Mar 2022

Keywords

Air pollution
Ferroelectric polarization
O activation
Perovskite nanomaterials
Photocatalysis

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10.1016/j.apcatb.2021.120876

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@article{58b7ea94382d4e8fa3aabafd7fd3c329,

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

abstract = "Photo-oxidative NOx removal often encountered with sluggish charge carrier separation kinetics and poor selectivity. Herein, Pd/ferroelectric Bi4Ti3O12 nanoflakes (Pd/BTO NF) were constructed to investigate the photo-excited charge separation, O2 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/TiO2. Revealed by electronic paramagnetic resonance and radical scavenging tests, it is observed that the primary O2 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 O2 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 Cao, \{Jun ji\}",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

year = "2022",

month = mar,

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

language = "英语",

volume = "302",

journal = "Applied Catalysis B: Environmental",

issn = "0926-3373",

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TY - JOUR

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, Jun ji

PY - 2022/3

Y1 - 2022/3

N2 - Photo-oxidative NOx removal often encountered with sluggish charge carrier separation kinetics and poor selectivity. Herein, Pd/ferroelectric Bi4Ti3O12 nanoflakes (Pd/BTO NF) were constructed to investigate the photo-excited charge separation, O2 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/TiO2. Revealed by electronic paramagnetic resonance and radical scavenging tests, it is observed that the primary O2 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 O2 activation species, and notable selectivity changes in photocatalysis mediated environmental remediation reactions.

AB - Photo-oxidative NOx removal often encountered with sluggish charge carrier separation kinetics and poor selectivity. Herein, Pd/ferroelectric Bi4Ti3O12 nanoflakes (Pd/BTO NF) were constructed to investigate the photo-excited charge separation, O2 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/TiO2. Revealed by electronic paramagnetic resonance and radical scavenging tests, it is observed that the primary O2 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 O2 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

UR - https://www.scopus.com/pages/publications/85118902482

U2 - 10.1016/j.apcatb.2021.120876

DO - 10.1016/j.apcatb.2021.120876

M3 - 文章

AN - SCOPUS:85118902482

SN - 0926-3373

VL - 302

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

M1 - 120876

ER -

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

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Keywords

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