Spin effects in regulating the adsorption characteristics of metal ions.

ABSTRACT: Understanding the adsorption behavior of intermediates at interfaces is crucial for various heterogeneous systems, but less attention has been paid to metal species. This study investigates the manipulation of Co³⁺ spin states in ZnCo₂O₄ spinel oxides and establishes their impact on metal ion adsorption. Using electrochemical sensing as a metric, we reveal a quasi-linear relationship between the adsorption affinity of metal ions and the high-spin state fraction of Co³⁺ sites. Increasing the high-spin state of Co³⁺ shifts its d-band center downward relative to the Fermi level, thereby weakening metal ion adsorption and enhancing sensing performance. These findings demonstrate a spin-state-dependent mechanism for optimizing interactions

SUBMITTER: Gao C 

PROVIDER: S-EPMC11708777 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature