Abstract
AbstractTransition metal oxides (TMOs) have been intensively investigated in varied electrochemical processes owing to their features of low cost, stability, and substantial activity, etc. The strain engineering of a TMO has been proposed as a promising method for enhanced electrochemical activities due to its strongly electron correlated nature. Generally this type of investigation is carried out by separated TMO thin films on various substrates with a different lattice constant. In this study, the oxygen evolution reaction (OER) activity of Van der Waals La2/3Sr1/3MnO3 (LSMO) membrane is studied as a function of continuous strain manipulation via curvature change. It is found that a total of ≈800% OER activity tunability can be achieved by only ≈0.4% in situ strain modulation. Then the variation of in‐plane interaction strength of the eg orbital is found to correspond to the sensitive OER tunability and 3dx2−y2 orbital occupancy is favored in an OER enhancement of LSMO.
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