A strong bimetal-support interaction in ethanol steam reforming
Hao Meng, Yusen Yang, Tianyao Shen, Wei Liu, Lei Wang, Pan Yin, Zhen Ren, Yiming Niu, Bingsen Zhang, Lirong Zheng, Hong Yan, Jian Zhang, Feng‐Shou Xiao, Min Wei, Xue Duan
Abstract
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 2 catalysts with tunable RhNi-TiO 2 strong bimetal-support interaction (SBMSI) derived from structure topological transformation of RhNiTi-layered double hydroxides (RhNiTi-LDHs) precursors. The resulting 0.5RhNi/TiO 2 catalyst (with 0.5 wt .% Rh) exhibits extraordinary catalytic performance toward ethanol steam reforming (ESR) reaction with a H 2 yield of 61.7%, a H 2 production rate of 12.2 L h −1 g cat −1 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 δ − -O v -Ti 3+ ; O v denotes oxygen vacancy), the generation of formate intermediate (the rate-determining step in ESR reaction) from steam reforming of CO and CH x is significantly promoted on 0.5RhNi/TiO 2 catalyst, accounting for its ultra-high H 2 production.