Spinel mixed oxides as a cation reservoir for the growth of the canonical (MgCoNiCuZn)O high-entropy oxide: a combined XAS/PXRD study

High-entropy oxides (HEOs) constitute a new paradigm in materials design, with a large variety of compositions and structures provided by the entropy mediated phase stabilization concept. This class of compounds offer new opportunities to achieve tunable properties that are often unique because they are driven by synergetic effects between the combined elements. For instance, recent studies have emphasized prospective applications in the field of electrochemical energy storage and catalysis. In this proposal, we intend to monitor the formation and the demixion of the canonical (Mg0.2Co0.2Ni0.2Cu0.2Zn0.2)O entropy-stabilized oxide from combined and quantitative XAFS/XRD studies as a function of temperature.