High-Areal Density Single-Atoms/Metal Oxide Nanosheets: A Micro-Gas Blasting Synthesis and Superior Catalytic Properties

Long Kuai; Li Liu; Qingmei Tao; Nan Yu; Erjie Kan; Na Sun; Shoujie Liu; Baoyou Geng

doi:10.1002/anie.202212338

High-Areal Density Single-Atoms/Metal Oxide Nanosheets: A Micro-Gas Blasting Synthesis and Superior Catalytic Properties

Angew Chem Int Ed Engl. 2022 Nov 7;61(45):e202212338. doi: 10.1002/anie.202212338. Epub 2022 Oct 7.

Authors

Long Kuai^{1

2}, Li Liu², Qingmei Tao², Nan Yu¹, Erjie Kan², Na Sun², Shoujie Liu³, Baoyou Geng^{1

4}

Affiliations

¹ College of Chemistry and Materials Science, The Key Laboratory of Electrochemical Clean Energy of An-hui Higher Education Institutes, Anhui Provincial Engineering Laboratory for New-Energy Vehicle Battery Energy-Storage Materials, Anhui Normal University, Jiuhua South Road, Wuhu, 241002, China.
² School of Chemical and Environmental Engineering, Anhui Laboratory of Clean Catalytic Engineering, Anhui Polytechnic University, Beijing Middle Road, Wuhu, 241000, China.
³ Chemistry and Chemical Engineering of Guangdong Laboratory, Shantou, 515063, China.
⁴ Institute of Energy, Hefei Comprehensive National Science Center, Anhui, Hefei, 230031, China.

PMID: 36102497
DOI: 10.1002/anie.202212338

Abstract

The two-dimensional nanosheets are conducive to not only endow opened surfaces for loading active metal atoms but also boost the mass transfer for the heterogeneous reactions. The challenge is how to load and stabilize single-atoms on nanosheets in high-areal densities. This work reports an efficient micro-gas blasting (MGB) strategy to access versatile noble metal single-atoms/metal oxide nanosheets, including Ir₁ /CoO_x , Pd₁ /CeO₂ , etc. Especially for Pt/CeO₂ nanosheets (Pt₁ /CeO₂ -S), the Pt loading is increased to 15 at%. The Pt₁ /CeO₂ -S catalysts from MGB are revealed to possess superior reactivity and tolerance in the model reaction of water-gas shift (WGS). The Pt₁ /CeO₂ -S catalyst exhibit 2-3 times reactivity that of their thicker counterpart, single-atom Pt₁ /CeO₂ microspheric catalyst. Moreover, the single-atom sites in Pt₁ /CeO₂ -S (1-10 %) catalysts are stable in a harsh WGS reaction condition of 10 % CO. This work thus paves a way to access the practical single-atom catalysts.

Keywords: High-Areal Density; Micro-Gas Blasting Synthesis; Nanosheets; Single-Atom Catalysts; Water-Gas Shift Reaction.

Abstract

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