Low temperature surface oxygen activation in crystalline MnO2 triggered by lattice confined Pd single atoms

被引：21

作者：

Liao, Xuemei ^{[1
]}

Zhao, Yonghui ^{[2
]}

Liu, Changwen ^{[1
]}

Li, Xiaopeng ^{[3
]}

Sun, Yu ^{[4
,5
]}

Kato, Kenichi ^{[6
]}

Yamauchi, Miho ^{[7
,8
]}

Jiang, Zheng ^{[9
,10
]}

机构：

[1] Xihua Univ, Coll Food & Biol Engn, Chengdu 610039, Sichuan, Peoples R China

[2] Chinese Acad Sci, Shanghai Adv Res Inst SARI, CAS Key Lab Low Carbon Convers Sci & Engn, 100 Haike Rd, Shanghai 201210, Peoples R China

[3] Donghua Univ, Coll Mat Sci & Engn, State Key Lab Modificat Chem Fibers & Polymer Mat, 2999 North Renmin Rd, Shanghai 201620, Peoples R China

[4] Hokkaido Univ, Inst Adv Higher Educ, Sapporo, Hokkaido 0600817, Japan

[5] Hokkaido Univ, Fac Sci, Dept Chem, Kita Ku, N10W8, Sapporo, Hokkaido 0600810, Japan

[6] SPring 8 Ctr, RIKEN, 1-1-1 Kouto, Sayo, Hyogo 6795148, Japan

[7] Kyushu Univ, Int Inst Carbon Neutral Energy Res WPI I2CNER, Nishi Ku, Motooka 744, Fukuoka 8190395, Japan

[8] Tohoku Univ, Adv Inst Mat Res AIMR, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan

[9] Chinese Acad Sci, Shanghai Adv Res Inst SARI, Zhangjiang Lab, Shanghai Synchrotron Radiat Facil, 239 Zhangheng Rd, Shanghai 201203, Peoples R China

[10] Chinese Acad Sci, Shanghai Inst Appl Phys, 2019 Jia Luo Rd, Shanghai 201800, Peoples R China

来源：

JOURNAL OF ENERGY CHEMISTRY | 2021年 / 62卷

基金：

中国国家自然科学基金;

关键词：

Single atom catalysts (SACs); Lattice confinement; Oxygen activation; Manganese oxide nanofiber; ATOMICALLY DISPERSED PALLADIUM; CO OXIDATION; PREFERENTIAL OXIDATION; CATALYTIC PERFORMANCE; ACTIVE-SITES; CERIUM OXIDE; GOLD; SUPPORT; CH4; NANOPARTICLES;

D O I：

10.1016/j.jechem.2021.03.012

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Tuning the coordination environment is the research axis of single atom catalysts (SACs). SACs are commonly stabilized by various defects from support. Here, we report a lattice confined Pd SAC using MnO2 as support. Compared with the Pd clusters anchored on the surface, the lattice confined Pd single atoms allows spontaneous exaction of surrounding lattice oxygen at room temperature when employed in CO oxidation. The MnO2 supported Pd SAC exhibited a high turnover frequency of 0.203 s(-1) at low reaction temperature, which is higher than that of recently reported Pd SACs. Theoretical calculations also confirmed the confined monatomic Pd activate lattice oxygen with an ultralow energy barrier. Our results illustrate that the unique coordination environment of single atom provided by lattice confinement is promising to boost the activity of SACs. (C) 2021 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.

引用

页码：136 / 144

页数：9

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