Enhanced performance of IrOx decorated NiOx/TiO₂ nanocatalyst for low-temperature CO₂ methanation

Mingxing Cheng^1,2,1*, Xin Tu¹, Tsan-Yao Chen^2,3

¹Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool, UK
²Department of Engineering and System Science, National Tsing Hua University, Hsinchu, Taiwan
³Institute of Nuclear Engineering and Science, National Tsing Hua University, Hsinchu, Taiwan

* Presenter:Mingxing Cheng, email:Mingxing.Cheng@liverpool.ac.uk

Currently, there are two major global issues that have been haunting our society for a very long time. One is global warming, and the other is the energy crisis. These two big problems are severely challenging our own lives as well as the survival of our next generation. In order to solve our problems, we need to utilize CO₂ to produce useful and valuable fuels and chemicals that can provide energy for our society. This is leading us to one well-studied strategy, the conversion of CO₂, which can effectively kill two birds with one stone. At present, thermal catalysis is the most practical method to utilize carbon dioxide. However, due to the high-temperature requirement, thermal catalysis does not perfectly meet environmental needs. Therefore, converting carbon dioxide under mild conditions is what most researchers are pursuing at the moment.

Herein, a series of novel NiIr/TiO₂ catalysts were successfully designed and prepared by the wet chemical method in this work. In the mixed gas atmosphere, both CO and CH₄ production were observed from 423K for all of the NiIr/TiO₂ samples. The NiIr/TiO2_3wt% exhibited the best performance with the highest CH₄ yield and selectivity.

Keywords: Nanocatalyst, Carbon dioxide reduction reaction, Low-temperature methanation