Unveiling Alkali-Induced Redox Modulation: In-Situ Spectroscopic Insights from RWGS on Alkali-Modified ZrO₂-Supported Cu Catalysts.

ABSTRACT: Alkali-modified solid catalysts represent a promising class of heterogeneous catalysts for various applications. Despite extensive research, the role of alkali metals remains debated. In this study, Na-modified ZrO₂-supported Cu catalysts are synthesized using different methods for the reverse water-gas shift (RWGS) reaction to elucidate the role of Na⁺. Catalytic results show that activity strongly depends on the preparation method, with the one-pot approach yielding three times higher activity than wet impregnation. The one-pot method significantly enhances Cu⁰ dispersion, preventing the loss of Cu sites due to agglomeration or coverage by Alkali. Although the prevailing view suggests that alkali metals favor the associative mechanism for CO formation. Co

SUBMITTER: Rabee AIM 

PROVIDER: S-EPMC12786349 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature