Activation of subnanometric Pt on Cu-modified CeO2 via redox-coupled atomic layer deposition for CO oxidation

被引：149

作者：

Liu, Xiao ^{[1
,2
]}

Jia, Shuangfeng ^{[3
,4
]}

Yang, Ming ^{[5
,7
]}

Tang, Yuanting ^{[2
]}

Wen, Yanwei ^{[2
]}

Chu, Shengqi ^{[6
]}

Wang, Jianbo ^{[3
,4
]}

Shan, Bin ^{[2
]}

Chen, Rong ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Mech Sci & Engn, State Key Lab Digital Mfg Equipment & Technol, Wuhan 430074, Hubei, Peoples R China

[2] Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China

[3] Wuhan Univ, Ctr Electron Microscopy, Sch Phys & Technol, MOE Key Lab Artificial Micro & Nanostruct, Wuhan 430072, Hubei, Peoples R China

[4] Wuhan Univ, Inst Adv Studies, Wuhan 430072, Hubei, Peoples R China

[5] Gen Motors Global Res & Dev, Chem Sci & Mat Syst Lab, 3500 Mound Rd, Warren, MI 48090 USA

[6] Chinese Acad Sci, Nstitute High Energy Phys, Beijing 100049, Peoples R China

[7] Clemson Univ, Dept Chem & Biomol Engn, Clemson, SC 29634 USA

来源：

NATURE COMMUNICATIONS | 2020年 / 11卷 / 01期

基金：

中国国家自然科学基金;

关键词：

INITIO MOLECULAR-DYNAMICS; OXYGEN VACANCIES; IN-SITU; CATALYSTS; CERIA; SUPPORT; GAS; NANOCLUSTERS; PERFORMANCE; EFFICIENCY;

D O I：

10.1038/s41467-020-18076-6

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：

Improving the low-temperature activity (below 100 degrees C) and noble-metal efficiency of automotive exhaust catalysts has been a continuous effort to eliminate cold-start emissions, yet great challenges remain. Here we report a strategy to activate the low-temperature performance of Pt catalysts on Cu-modified CeO2 supports based on redox-coupled atomic layer deposition. The interfacial reducibility and structure of composite catalysts have been precisely tuned by oxide doping and accurate control of Pt size. Cu-modified CeO2-supported Pt sub-nanoclusters demonstrate a remarkable performance with an onset of CO oxidation reactivity below room temperature, which is one order of magnitude more active than atomically-dispersed Pt catalysts. The Cu-O-Ce site with activated lattice oxygen anchors deposited Pt sub-nanoclusters, leading to a moderate CO adsorption strength at the interface that facilitates the low-temperature CO oxidation performance.

引用

页数：8

共 57 条

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