Refine your search:     
Report No.
 - 

Identification of hydrogen species on Pt/Al$$_{2}$$O$$_{3}$$ by ${it in situ}$ inelastic neutron scattering and their reactivity with ethylene

Yamazoe, Seiji*; Yamamoto, Akira*; Hosokawa, Saburo*; Fukuda, Ryoichi*; Hara, Kenji*; Nakamura, Mitsutaka  ; Kamazawa, Kazuya*; Tsukuda, Tatsuya*; Yoshida, Hisao*; Tanaka, Tsunehiro*

Hydrogen (H) species adsorbed on catalyst surfaces are key intermediates in catalytic hydrogenation reactions over supported metal catalysts. However, individual identification of H species on the metal catalysts has not been established to date. Here, we elucidated the H species on Pt/Al$$_{2}$$O$$_{3}$$ by the combination of ${it in situ}$ inelastic neutron scattering (INS) and density functional theory (DFT). Several H species in the presence of H$$_{2}$$ were successfully identified at different sites on the Pt surface and Al$$_{2}$$O$$_{3}$$ support. The ${it in situ}$ INS and FT-IR measurements revealed that the hydride/atop Pt-H, bridged perimeter/terrace Pt-H-Pt, and threefold Pt$$_{3}$$-H are active intermediates in the C$$_{2}$$H$$_{4}$$ hydrogenation reaction, whereas the edge Pt-H-Pt is a rather inert species. In addition, the ${it in situ}$ measurements indicate that the Al$$_{2}$$O$$_{3}$$ itself acts as hydrogen storage material by mediating AlO-H and Al-H-Al species, which serve H species in the C$$_{2}$$H$$_{4}$$ hydrogenation reaction.

Accesses

:

- Accesses

InCites™

:

Percentile:81.22

Category:Chemistry, Physical

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.