Boosting reactivity of water-gas shift reaction by synergistic function over CeO2-x/CoO1-x/Co dual interfacial structures

被引：44

作者：

Fu, Xin-Pu ^{[1
]}

Wu, Cui-Ping ^{[1
]}

Wang, Wei-Wei ^{[1
]}

Jin, Zhao ^{[1
]}

Liu, Jin-Cheng ^{[2
,3
]}

Ma, Chao ^{[4
]}

Jia, Chun-Jiang ^{[1
]}

机构：

[1] Shandong Univ, Sch Chem & Chem Engn, Key Lab Special Aggregated Mat, Key Lab Colloid & Interface Chem, Jinan 250100, Peoples R China

[2] Nankai Univ, Sch Mat Sci & Engn, Ctr Rare Earth & Inorgan Funct Mat, Tianjin 300350, Peoples R China

[3] Nankai Univ, Natl Inst Adv Mat, Tianjin 300350, Peoples R China

[4] Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Peoples R China

来源：

NATURE COMMUNICATIONS | 2023年 / 14卷 / 01期

基金：

美国国家科学基金会;

关键词：

METAL-SUPPORT INTERACTIONS; RAMAN-SPECTROSCOPY; CATALYST; CO; SITES; GOLD; OPTIMIZATION; CO/CEO2; ALKALI; CEOX;

D O I：

10.1038/s41467-023-42577-9

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Dual-interfacial structure within catalysts is capable of mitigating the detrimentally completive adsorption during the catalysis process, but its construction strategy and mechanism understanding remain vastly lacking. Here, a highly active dual-interfaces of CeO2-x/CoO1-x/Co is constructed using the pronounced interfacial interaction from surrounding small CeO2-x islets, which shows high activity in catalyzing the water-gas shift reaction. Kinetic evidence and in-situ characterization results revealed that CeO2-x modulates the oxidized state of Co species and consequently generates the dual active CeO2-x/CoO1-x/Co interface during the WGS reaction. A synergistic redox mechanism comprised of independent contribution from dual functional interfaces, including CeO2-x/CoO1-x and CoO1-x/Co, is authenticated by experimental and theoretical results, where the CeO2-x/CoO1-x interface alleviates the CO poison effect, and the CoO1-x/Co interface promotes the H-2 formation. The results may provide guidance for fabricating dual-interfacial structures within catalysts and shed light on the mechanism over multi-component catalyst systems.

引用

页数：11

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