Chemistry

Three-dimensional strain dynamics govern the hysteresis in heterogeneous catalysis

A. R. Passos, A. Rochet, et al.

This study conducted by Aline R. Passos and colleagues unveils the groundbreaking in situ three-dimensional strain evolution of single gold nanocrystals during a catalytic CO oxidation reaction, revealing how anisotropic strain dynamics influence catalytic mechanisms at the nanoscale.

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Abstract

This study reveals the in situ three-dimensional strain evolution of single gold nanocrystals during a catalytic CO oxidation reaction using coherent X-ray diffractive imaging. Anisotropic strain dynamics at the nanoscale were observed, showing that identically oriented facets are affected differently by strain, leading to preferential active site formation. The single nanoparticle elastic energy landscape, mapped with attojoule precision, shows a dependence on heating versus cooling cycles, correlating with the observed catalytic hysteresis. This research provides insights into nanoscale catalytic mechanisms and deactivation processes.

Publisher

Nature Communications

Published On

Jul 20, 2020

Authors

Aline R. Passos, Amélie Rochet, Luiza M. Manente, Ana F. Suzana, Ross Harder, Wonsuk Cha, Florian Meneau

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