Study on the crystallographic orientation dependent electrochemical corrosion rates of platinum.

<title>Abstract</title> <p>This paper provides a study for crystallographic orientation-dependent corrosion rate of platinum employing an ab initio model with inputs from first-principles calculations. Results showed that the sequence of corrosion rate is in the order of (111) &lt; (221) &lt; (211) &lt; (110) &lt; (100) &lt; (210) &lt; (321) &lt; (311) &lt; (401).. The predicted corrosion current densities for (111), (110), and (100) surfaces are in general agreement with the experimental results. This study elucidates the intrinsic relationship among crystallographic orientation, surface thermodynamic stability, hydrogen adsorption behavior, and electrochemical corrosion kinetics, providing a theoretical basis for predicting the corrosion resistance of noble metal electrodes and guiding crystallographic orientation engineering.</p>