Self-regenerative noble metal catalysts supported on high-entropy oxides

Chemical Communications : Chem Comm
Hao ChenSheng Dai

Abstract

Discovery of anti-sintering noble metal catalysts is challenging, as supported noble metal species tend to aggregate at high temperatures, leading to severely deteriorated catalytic performances. Here we show that 1 wt% of noble metal species including Au, Pd and Ru can be incorporated into high-entropy oxides (HEOs) through entropy stabilization at 900 °C in air. A reversible temperature-dependent dissolution-exsolution process is observed for Au-HEO. Further correlation with distinct CO oxidation capabilities demonstrates the potential to utilize the entropy effect to access self-regenerative catalysts for catalytic reactions.

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Citations

May 14, 2021·Science Advances·Yifan Sun, Sheng Dai

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Methods Mentioned

BETA
X-ray
transmission

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