Single transition metal anchored C9N4 sheets as an efficient catalyst for CO oxidation: a first-principles study
Literature Information
Junchao Huang, Chun Zhou, Zhaoqin Chu, Xu Liu
Single-atom catalysts (SACs) often exhibit superb catalytic activity due to their high atom utilization. By comparing the adsorption energies of O2 and CO adsorbed on TM@C9N4, we expect that Co and Ni anchored at the cavity of C9N4 exhibit a higher catalytic activity for CO oxidation. For the entire reaction, the Eley–Rideal, New Eley–Rideal, Ter-molecular Eley–Rideal and Langmuir–Hinshelwood mechanisms are all taken into account. Depending on the reaction mechanisms, the catalysts Co@C9N4 and Ni@C9N4 show excellent activity, with a kinetic energy barrier ranging from 0.19 eV to 0.54 eV for the former, while the corresponding energy barrier is 0.26 eV to 0.44 eV for the latter. The superior stability and activity of Co/Ni@C9N4 can efficiently oxidize the large amounts of CO caused by inadequate combustion of coal and natural gas resources.
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