安徽师范大学耿保友团队开发出高面积密度单原子/金属氧化物纳米片：一种微气爆破合成及优越的催化性能。相关研究成果于2022年9月14日发表于国际一流学术期刊《德国应用化学》。

二维纳米片不仅有助于为负载活性金属原子提供开放的表面，而且有助于促进非均相反应的传质。挑战在于如何在高面密度的纳米片上加载和稳定单个原子。

该工作报告了一种有效的微气体喷砂（MGB）策略，以获得多功能贵金属单原子/金属氧化物纳米片，包括Ir1/CoOx、Pd1/CeO₂等。特别是对于Pt/CeO₂纳米片（Pt1/CeO₂-S），Pt负载量增加到15at%。在水煤气变换（WGS）模型反应中，来自MGB的Pt1/CeO₂-S催化剂具有优异的反应性和耐受性。Pt 1/CeO₂-S催化剂的活性是其较厚的对应单原子Pt1/CeO₂微球催化剂的2-3倍。此外，Pt1/CeO²-S（1-10%）催化剂中的单原子位点在10%CO的苛刻WGS反应条件下是稳定的。

该项工作为获得实用的单原子催化剂铺平了道路。

附：英文原文

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

Author: Long Kuai, Li Liu, Qingmei Tao, Nan Yu, Erjie Kan, Na Sun, Shoujie Liu, Baoyou Geng

Issue&Volume: 2022-09-14

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 Ir  1  /CoO  x  , Pd  1  /CeO  2  ,  etc  . Especially for Pt/CeO  2  nanosheets (Pt  1  /CeO  2  -S), the Pt loading is increased to 15 at%. The Pt  1  /CeO  2  -S catalysts from MGB are revealed to possess superior reactivity and tolerance in the model reaction of water-gas shift (WGS). The Pt  1  /CeO  2  -S catalyst exhibit 2-3 times reactivity that of their thicker counterpart, single-atom Pt  1  /CeO  2  microspheric catalyst. Moreover, the single-atom sites in Pt  1  /CeO  2  -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.

DOI: 10.1002/anie.202212338

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202212338