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DOI10.1039/c9ee03492g
A tailored oxide interface creates dense Pt single-atom catalysts with high catalytic activity
Yoo M.; Yu Y.-S.; Ha H.; Lee S.; Choi J.-S.; Oh S.; Kang E.; Choi H.; An H.; Lee K.-S.; Park J.Y.; Celestre R.; Marcus M.A.; Nowrouzi K.; Taube D.; Shapiro D.A.; Jung W.; Kim C.; Kim H.Y.
发表日期2020
ISSN1754-5692
起始页码1231
结束页码1239
卷号13期号:4
英文摘要Highly reactive dense Pt single-atoms stabilized on an oxide support can resolve a grand challenge in the economic use of Pt in catalysis. The maximized number density of reaction sites provided by dense Pt single-atoms guarantees the improved catalytic performance of Pt combined with high efficiency. By manipulating the chemical nature of multi-component interfaces, we synthesized CO-tolerant dense Pt single-atoms highly reactive for the CO oxidation reaction, which governs the key steps for chemical energy conversion and emission control. The addition of 1 wt% of Ce to TiO2 support particles creates a CeOx-TiO2 interface that stabilizes Pt single-atoms by strong electronic interactions. Dense Pt single-atoms formed on CeOx/TiO2 oxides exhibit 15.1 times greater specific mass activity toward CO oxidation at 140 °C compared with a bare Pt/TiO2 catalyst. We elaborate how the CeOx-TiO2 interfaces activate the interface-mediated Mars-van Krevelen mechanism of CO oxidation and protect Pt single-atoms from CO-poisoning. Through a comprehensive interpretation of the formation and activation of dense Pt single-atoms using operando X-ray absorption spectroscopy, density functional theory calculations, and experimental catalyst performance tests, we provide a key that enables the catalytic performance of noble metal single-atom catalysts to be optimized by atomic-scale tuning of the metal-support interface. © The Royal Society of Chemistry.
语种英语
scopus关键词Atoms; Catalyst activity; Density functional theory; Emission control; Energy conversion; Oxidation; Titanium dioxide; X ray absorption spectroscopy; Catalyst performance; Catalytic performance; Electronic interactions; Grand Challenge; High-efficiency; Mars-van krevelen mechanisms; Metal-support interfaces; Oxide interfaces; Platinum metals; absorption; catalysis; catalyst; chemical reaction; detection method; efficiency measurement; inorganic compound; oxidation; platinum
来源期刊Energy and Environmental Science
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/162894
作者单位Department of Materials Science and Engineering, Chungnam National University, Daejeon, 34134, South Korea; Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States; Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, South Korea; Kaist Analysis Center for Research Advancement, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, South Korea; Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon, 34141, South Korea; Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, South Korea; Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, 37673, South Korea
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Yoo M.,Yu Y.-S.,Ha H.,et al. A tailored oxide interface creates dense Pt single-atom catalysts with high catalytic activity[J],2020,13(4).
APA Yoo M..,Yu Y.-S..,Ha H..,Lee S..,Choi J.-S..,...&Kim H.Y..(2020).A tailored oxide interface creates dense Pt single-atom catalysts with high catalytic activity.Energy and Environmental Science,13(4).
MLA Yoo M.,et al."A tailored oxide interface creates dense Pt single-atom catalysts with high catalytic activity".Energy and Environmental Science 13.4(2020).
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