学術雑誌論文

学術雑誌論文

Physical Chemistry Chemical Physics. 2024, 26, p. 28525-28532

Effects of oxide platforms on the dynamics and reduction characteristics of hydrogen spillover

Royal Society of Chemistry

英語

2024-11-05

https://doi.org/10.1039/d4cp03093a

Shun K., Fujimoto A., Mori K., et al. Effects of oxide platforms on the dynamics and reduction characteristics of hydrogen spillover. Physical Chemistry Chemical Physics 26, 28525 (2024); https://doi.org/10.1039/d4cp03093a.

The characteristics of hydrogen spillover on various metal oxides, involving the concurrent diffusion of protons (H⁺) and electrons (e⁻), were systematically studied by combining in situ analytical techniques with kinetic analyses. H₂-temperature programmed reduction and in situ X-ray absorption fine structure data showed that hydrogen spillover from Pt onto TiO₂ and WO₃ greatly decreased the temperatures at which Zn²⁺ ions deposited on these remote metal oxides were reduced. In contrast, hydrogen spillover on MgO and CeO₂ did not significantly affect the reduction of remote Zn²⁺. Mechanisms explaining the effects of spilled hydrogen on reduction for each oxide substrate were proposed based on the dynamic behaviors of H⁺ and e⁻ as ascertained by means of in situ spectroscopic characterizations and kinetic analyses. The results of this work indicate that e⁻ diffusion rather than H⁺ diffusion promotes the reduction of deposited metal ions and that interparticle hydrogen spillover can be facilitated over TiO₂ and WO₃ as a consequence of the interfacial diffusion of H⁺ and e⁻ pairs. These findings provide an improved understanding of the hydrogen spillover phenomenon.

98566

Effects of oxide platforms on the dynamics and reduction characteristics of hydrogen spillover

Royal Society of Chemistry

英語

2024-11-05

Physical Chemistry Chemical Physics

26

28525

28532

https://doi.org/10.1039/d4cp03093a

https://hdl.handle.net/11094/98566