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Three-Site Catalysis of In1-MoB2 to Boost Urea Electrosynthesis
Fuzhou Wang1,2, Jiahang Li1, Xuezi Xing2
1Anhui Provincial Collaborative Innovation Center of Advanced Functional Composite Materials, School of Physics and Electronic Information, Huaibei Normal University, Huaibei 235000, Anhui, China.
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We develop single-atom In on MoB2 (In1-MoB2) as an efficient catalyst for urea synthesis from coelectrolysis of NO3- and CO2. Mechanistic studies reveal a three-site synergistic catalysis mechanism of In1-MoB2, where In1/B sites enable the formation of *CO/*NH2 intermediates and their C-N coupling, while the Mo site facilitates H2O dissociation to provide the ample protons required for the protonation of C/N intermediates toward urea generation. Moreover, by employing a plasma-electrocatalytic route with integrating plasma-driven air oxidation and electrocatalysis, In1-MoB2 exhibits the exceptional Faradaic efficiency of 80.4% and urea yield rate of 116.5 mmol h-1 g-1, ranking in the top performance level.
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