Galvanic hydrogenation reaction in metal oxide
JunHwa Kwon, Soonsung So, Ki-Yeop Cho, Seung Min Lee, Kiyeon Sim, Subin Kim, Seunghyun Jo, Byeol Kang, Younki Lee, Hee‐Young Park, Jung Tae Lee, Joo‐Hyoung Lee, KwangSup Eom, Thomas F. Fuller
Abstract
Rational reforming of metal oxide has a potential importance to modulate their inherent properties toward appealing characteristics for various applications. Here, we present a detailed fundamental study of the proton migration phenomena between mediums and propose the methodology for controllable metal oxide hydrogenation through galvanic reactions with metallic cation under ambient atmosphere. As a proof of concept for hydrogenation, we study the role of proton adoption on the structural properties of molybdenum trioxide, as a representative, and its impact on redox characteristics in Li-ion battery (LiB) systems using electrochemical experiments and first-principles calculation. The proton adoption contributes to a lattice rearrangement facilitating the faster Li-ion diffusion along the selected layered and mediates the diffusion pathway that promote the enhancements of high-rate performance and cyclic stability. Our work provides physicochemical insights of hydrogenations and underscores the viable approach for improving the redox characteristics of layered oxide materials. Controllable hydrogenation of metal oxides provides a route to tune their electronic and redox properties for desired applications. Here, authors study proton movement into molybdenum trioxide and propose a solution treatment method for controllable metal oxide hydrogenation using metallic cations.