Boosting the Water Gas Shift Reaction Rate on Au Nanocatalysts through Collaborative Synthesis of Warm and Cold Plasmas
Ye-Cheng Li, Xiaosong Li, Jinglin Liu, Bin Zhu, Guanghui Zhang, Dongdong Liu, Wei Liu, Xinwen Guo, Ai‐Min Zhu
Abstract
TiO 2 -supported Au nanocatalysts are highly attractive for the water gas shift (WGS) reaction due to their high catalytic activity at low temperatures. Herein, the (Au/TiO 2– x ) OP catalyst synthesized by the combination of warm and cold plasmas exhibits a high WGS reaction rate of 1.63 mol·g Au –1 ·h –1 at 120 °C, being one of the highest WGS rates among Au/TiO 2 catalysts. The warm plasma generates a large amount of oxygen vacancies, while the cold plasma treatment generates small Au nanoparticles and interfacial sites. The (Au/TiO 2– x ) OP catalyst features two kinds of abundant active sites including Au δ+ -O δ− -Ti 4+ and Au 0 -O v -Ti 3+, which accelerate the WGS reaction simultaneously along the intermediate and redox reaction pathways, respectively.