TY - JOUR
T1 - Atomic and Electronic Structure of Pt/TiO2 Catalysts and Their Relationship to Catalytic Activity
AU - Hojo, Hajime
AU - Gondo, Miki
AU - Yoshizaki, Satoru
AU - Einaga, Hisahiro
N1 - Funding Information:
This study was supported by the JAPAN Science and Technology Agency (JST) FOREST project (Grant Number JPMJFR201UA; JSPS KAKENHI (Grant No. 20H02824); Asahi Glass Foundation. A part of this work was supported by Nanotechnology Platform Program “Molecule and Material Synthesis” (Grant No. JPMXP09 S21KU0047) of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan.
Publisher Copyright:
© 2021 American Chemical Society
PY - 2022/1/12
Y1 - 2022/1/12
N2 - Understanding the nature of the interaction between a metal and support, which is known as the metal–support interaction, in supported metal catalysts is crucial to design catalysts with desired properties. Here, we have developed model Pt/TiO2 catalysts based on the deposition of colloidal Pt nanoparticles and studied their atomic and electronic structures before and after a postdeposition treatment that induces catalytic activity using aberration-corrected scanning transmission electron microscopy, electron energy loss spectroscopy, and first-principles calculations. Direct contact between Pt nanoparticles and TiO2 is realized after the postdeposition treatment, which is accompanied by the formation of a Ti3+ state on the TiO2 surface close to the Pt nanoparticles and a Ptδ+ state on the Pt nanoparticles. The origin of these two states and their effect on the catalytic properties are discussed. These findings pave the way for a comprehensive understanding of metal–support interactions in supported metal catalysts.
AB - Understanding the nature of the interaction between a metal and support, which is known as the metal–support interaction, in supported metal catalysts is crucial to design catalysts with desired properties. Here, we have developed model Pt/TiO2 catalysts based on the deposition of colloidal Pt nanoparticles and studied their atomic and electronic structures before and after a postdeposition treatment that induces catalytic activity using aberration-corrected scanning transmission electron microscopy, electron energy loss spectroscopy, and first-principles calculations. Direct contact between Pt nanoparticles and TiO2 is realized after the postdeposition treatment, which is accompanied by the formation of a Ti3+ state on the TiO2 surface close to the Pt nanoparticles and a Ptδ+ state on the Pt nanoparticles. The origin of these two states and their effect on the catalytic properties are discussed. These findings pave the way for a comprehensive understanding of metal–support interactions in supported metal catalysts.
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U2 - 10.1021/acs.nanolett.1c03485
DO - 10.1021/acs.nanolett.1c03485
M3 - Article
C2 - 34958224
AN - SCOPUS:85122313750
VL - 22
SP - 145
EP - 150
JO - Nano Letters
JF - Nano Letters
SN - 1530-6984
IS - 1
ER -