Toward an effective control of the H₂ to CO ratio in the electroreduction of CO₂ over Titanate Nanosheets incorporating Au Nanoparticles = Toward an effective control of the H₂ to CO ratio in the electroreduction of CO₂ over Titanate Nanosheets incorporating Au Nanoparticles

다국어 초록 (Multilingual Abstract)

The electroreduction of CO₂ has emerged as a rational answer to uprising CO₂ emissions and a strategy to incorporate renewable electricity into the global energy supply. In particular, CO₂RR to CO has been highlighted in the industrial conversion of syngas (H₂ and CO) to fuels through subsequent technologies. Here we report for the first time a strategy to tune the H₂ to CO ratio by facile composition control of the components of a rationally designed binary nanostructure. By adjusting the loading of Au nanoparticles immobilized on ultra-thin titanate nanosheets in a 0 to 93 wt.% range, the CO Faradaic efficiency balanced by exclusive H₂ formation could be effectively varied in a 3 to 80% range. A variation of the electronic properties of these nanostructures, corroborated by XPS characterization, was proposed to dictate the stabilization of formed reaction intermediates and subsequent product selectivity.