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A strong bimetal-support interaction in ethanol steam reforming.

Authors :: Meng H
Yang Y
Shen T
Liu W
Wang L
Yin P
Ren Z
Niu Y
Zhang B
Zheng L
Yan H
Zhang J
Xiao FS
Wei M
Duan X
Source :: Nature communications [Nat Commun] 2023 Jun 02; Vol. 14 (1), pp. 3189. Date of Electronic Publication: 2023 Jun 02.
Publication Year :: 2023
Abstract: The metal-support interaction (MSI) in heterogeneous catalysts plays a crucial role in reforming reaction to produce renewable hydrogen, but conventional objects are limited to single metal and support. Herein, we report a type of RhNi/TiO <subscript>2</subscript> catalysts with tunable RhNi-TiO <subscript>2</subscript> strong bimetal-support interaction (SBMSI) derived from structure topological transformation of RhNiTi-layered double hydroxides (RhNiTi-LDHs) precursors. The resulting 0.5RhNi/TiO <subscript>2</subscript> catalyst (with 0.5 wt.% Rh) exhibits extraordinary catalytic performance toward ethanol steam reforming (ESR) reaction with a H <subscript>2</subscript> yield of 61.7%, a H <subscript>2</subscript> production rate of 12.2 L h <superscript>-1</superscript> g <subscript>cat</subscript> <superscript>-1</superscript> and a high operational stability (300 h), which is preponderant to the state-of-the-art catalysts. By virtue of synergistic catalysis of multifunctional interface structure (Rh-Ni <superscript>δ-</superscript> -O <subscript>v</subscript> -Ti <superscript>3+</superscript> ; O <subscript>v</subscript> denotes oxygen vacancy), the generation of formate intermediate (the rate-determining step in ESR reaction) from steam reforming of CO and CH <subscript>x</subscript> is significantly promoted on 0.5RhNi/TiO <subscript>2</subscript> catalyst, accounting for its ultra-high H <subscript>2</subscript> production.<br /> (© 2023. The Author(s).)