Sulfur stabilizing metal nanoclusters on carbon at high temperatures

Peng Yin, Xiao Luo, Yanfu Ma, Sheng-Qi Chu, Si Chen, Xusheng Zheng, Junling Lu (), Xiao-Jun Wu () and Hai-Wei Liang ()
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Peng Yin: Hefei National Laboratory for Physical Sciences at the Microscale, School of Chemistry and Materials Sciences, University of Science and Technology of China
Xiao Luo: Hefei National Laboratory for Physical Sciences at the Microscale, School of Chemistry and Materials Sciences, University of Science and Technology of China
Yanfu Ma: Hefei National Laboratory for Physical Sciences at the Microscale, School of Chemistry and Materials Sciences, University of Science and Technology of China
Sheng-Qi Chu: Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences
Si Chen: Hefei National Laboratory for Physical Sciences at the Microscale, School of Chemistry and Materials Sciences, University of Science and Technology of China
Xusheng Zheng: National Synchrotron Radiation Laboratory, University of Science and Technology of China
Junling Lu: Hefei National Laboratory for Physical Sciences at the Microscale, School of Chemistry and Materials Sciences, University of Science and Technology of China
Xiao-Jun Wu: Hefei National Laboratory for Physical Sciences at the Microscale, School of Chemistry and Materials Sciences, University of Science and Technology of China
Hai-Wei Liang: Hefei National Laboratory for Physical Sciences at the Microscale, School of Chemistry and Materials Sciences, University of Science and Technology of China

Nature Communications, 2021, vol. 12, issue 1, 1-10

Abstract: Abstract Supported metal nanoclusters consisting of several dozen atoms are highly attractive for heterogeneous catalysis with unique catalytic properties. However, the metal nanocluster catalysts face the challenges of thermal sintering and consequent deactivation owing to the loss of metal surface areas particularly in the applications of high-temperature reactions. Here, we report that sulfur—a documented poison reagent for metal catalysts—when doped in a carbon matrix can stabilize ~1 nanometer metal nanoclusters (Pt, Ru, Rh, Os, and Ir) at high temperatures up to 700 °C. We find that the enhanced adhesion strength between metal nanoclusters and the sulfur-doped carbon support, which arises from the interfacial metal-sulfur bonding, greatly retards both metal atom diffusion and nanocluster migration. In catalyzing propane dehydrogenation at 550 °C, the sulfur-doped carbon supported Pt nanocluster catalyst with interfacial electronic effects exhibits higher selectivity to propene as well as more stable durability than sulfur-free carbon supported catalysts.

Date: 2021
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DOI: 10.1038/s41467-021-23426-z

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