Construction of Pt<sup>δ+</sup>–O(H)–Ti<sup>3+</sup> Species for Efficient Catalytic Production of Hydrogen
Hai Wang, Hui Yu, Yiming Niu, Kai He, Evgeny I. Vovk, Xiaohong Zhou, Yong Yang, Yucai Qin, Bingsen Zhang, Lijuan Song, Liang Wang, Feng‐Shou Xiao
Abstract
Hydrogen is an attractive energy carrier because of its high energy density and clean emission. Herein, we report the construction of Pt δ+ –O(H)–Ti 3+ species on titania-supported Pt nanoparticles with strong metal–support interaction (SMSI), which boost the catalytic production of hydrogen from methanol steam reforming and water-gas shift at low temperatures. Characterizations of in-situ FTIR spectroscopy confirmed the formation of Pt δ+ –O(H)–Ti 3+ species, which resulted from the reduction of titania and dissociation of water at the Pt–titania interfaces. Compared with the general titania-supported Pt NPs without SMSI, the Pt/TiO 2 with SMSI exhibited an improved hydrogen production rate by 9 times, and the CO concentration in the effluent was lower than 200 ppm. These findings gave a model for exploring the structure-performance interplay and provided an efficient strategy to optimize the catalysts to accelerate the production of hydrogen.