Presentation Information
[3H10]Steady-State Analysis of CO2 Hydrogenation over CuZn-Based Single-Crystal and Powder Model Catalysts
*Tetta Takeuchi1, Ryusei Kojima2, Ayumu Sakurai2, Bang Lu3, Tadahiro Fujitani6, Takahiro Kondo4, Junji Nakamura5, Satoru Takakusagi3, Kotaro Takeyasu3 (1. Graduate School of Environmental Science, Hokkaido University, 2. Graduate School of Science and Technology, University of Tsukuba, 3. Institute for Catalysis, Hokkaido University, 4. Institute of Pure and Applied Sciences, University of Tsukuba, 5. International Institute for Carbon-Neutral Energy Research, Kyushu University, 6. National Institute of Advanced Industrial Science and Technology)
In this study, the influence of Zn addition on formate decomposition was quantitatively investigated using both a powder catalyst and a Zn/Cu(111) model catalyst. Formate stabilization was observed on both catalysts, with estimated activation energies of 133 ± 12 kJ/mol for the powder catalyst and 124 kJ/mol for the model catalyst. This agreement suggests that Zn in the powder behaves in a metallic manner and contributes to formate stabilization. Using the obtained activation energies, the formate surface coverage under reaction steady-state conditions was analyzed, successfully reproducing its temperature dependence.