Journal ArticleDOI
Single-atom catalysis of CO oxidation using Pt1/FeOx
Botao Qiao,Aiqin Wang,Xiaofeng Yang,Lawrence F. Allard,Zheng Jiang,Yi-Tao Cui,Jingyue Liu,Jingyue Liu,Jun Li,Tao Zhang +9 more
TLDR
Density functional theory calculations show that the high catalytic activity correlates with the partially vacant 5d orbitals of the positively charged, high-valent Pt atoms, which help to reduce both the CO adsorption energy and the activation barriers for CO oxidation.Abstract:
Platinum-based heterogeneous catalysts are critical to many important commercial chemical processes, but their efficiency is extremely low on a per metal atom basis, because only the surface active-site atoms are used. Catalysts with single-atom dispersions are thus highly desirable to maximize atom efficiency, but making them is challenging. Here we report the synthesis of a single-atom catalyst that consists of only isolated single Pt atoms anchored to the surfaces of iron oxide nanocrystallites. This single-atom catalyst has extremely high atom efficiency and shows excellent stability and high activity for both CO oxidation and preferential oxidation of CO in H-2. Density functional theory calculations show that the high catalytic activity correlates with the partially vacant 5d orbitals of the positively charged, high-valent Pt atoms, which help to reduce both the CO adsorption energy and the activation barriers for CO oxidation.read more
Citations
More filters
Journal ArticleDOI
Single-atom catalysts: a new frontier in heterogeneous catalysis.
TL;DR: Recent advances in preparation, characterization, and catalytic performance of SACs are highlighted, with a focus on single atoms anchored to metal oxides, metal surfaces, and graphene, offering the potential for applications in a variety of industrial chemical reactions.
Journal ArticleDOI
Metal Catalysts for Heterogeneous Catalysis: From Single Atoms to Nanoclusters and Nanoparticles.
Lichen Liu,Avelino Corma +1 more
TL;DR: This Review will compare the results obtained from different systems and try to give a picture on how different types of metal species work in different reactions and give perspectives on the future directions toward better understanding of the catalytic behavior of different metal entities in a unifying manner.
Journal ArticleDOI
Heterogeneous single-atom catalysis
TL;DR: A review of single-atom catalysts can be found in this paper, where the authors discuss the utility of SACs in a broad scope of industrially important reactions and highlight the advantages these catalysts have over those presently used.
Journal ArticleDOI
Single Cobalt Atoms with Precise N-Coordination as Superior Oxygen Reduction Reaction Catalysts
Peiqun Yin,Tao Yao,Yuen Wu,Yuen Wu,Lirong Zheng,Yue Lin,Wei Liu,Huanxin Ju,Junfa Zhu,Xun Hong,Xun Hong,Zhaoxiang Deng,Gang Zhou,Shiqiang Wei,Yadong Li,Yadong Li +15 more
TL;DR: Durability tests revealed that the Co single atoms exhibit outstanding chemical stability during electrocatalysis and thermal stability that resists sintering at 900 °C, which could facilitate new discoveries at the atomic scale in condensed materials.
Journal ArticleDOI
Isolated Single Iron Atoms Anchored on N-Doped Porous Carbon as an Efficient Electrocatalyst for the Oxygen Reduction Reaction
Yuanjun Chen,Shufang Ji,Yang-Gang Wang,Juncai Dong,Wenxing Chen,Zhi Li,Rongan Shen,Lirong Zheng,Zhongbin Zhuang,Dingsheng Wang,Yadong Li +10 more
TL;DR: Experiments demonstrated that maintaining the Fe as isolated atoms and incorporating nitrogen was essential to deliver the high performance, and the high reactivity to the high efficiency of the single Fe atoms in transporting electrons to the adsorbed OH species.
References
More filters
Journal ArticleDOI
Size- and support-dependency in the catalysis of gold
TL;DR: In this article, the adsorption properties and reactivities of gold are summarized in terms of their size dependency from bulk to fine particles, clusters and atoms, and the catalytic performances of gold markedly depend on dispersion, supports, and preparation methods.
Journal ArticleDOI
Gold catalysts prepared by coprecipitation for low-temperature oxidation of hydrogen and of carbon monoxide
TL;DR: In this paper, gold catalysts were prepared by coprecipitation from an aqueous solution of HAuCl4 and the nitrates of various transition metals, including Auα-Fe2O3, AuCo3O4, and AuNiO.
Journal ArticleDOI
Active Nonmetallic Au and Pt Species on Ceria-Based Water-Gas Shift Catalysts
TL;DR: It is reported here that for the class of nanostructured gold– or platinum–cerium oxide catalysts, which are active for the water-gas shift reaction, metal nanoparticles do not participate in the reaction.
Journal ArticleDOI
Low-temperature oxidation of CO catalysed by Co 3 O 4 nanorods
TL;DR: Tricobalt tetraoxide nanorods not only catalyse CO oxidation at temperatures as low as –77 °C but also remain stable in a moist stream of normal feed gas, showing the importance of morphology control in the preparation of base transition-metal oxides as highly efficient oxidation catalysts.
Journal ArticleDOI
The Structure of Catalytically Active Gold on Titania
Mingshu Chen,D. W. Goodman +1 more
TL;DR: Kinetic measurements for the catalytic oxidation of carbon monoxide show that the gold bilayer structure is significantly more active than the monolayer, thus eliminating particle shape and direct support effects.