Angewandte Chemie International Edition · 2022 · 198 citations · 42 references
Ruthenium (Ru) has been theoretically considered a viable alkaline hydrogen evolution reaction electrocatalyst due to its fast water dissociation kinetics. However, its strong affinity to the adsorbed hydroxyl (OH<sub>ad</sub> ) blocks the active sites, resulting in unsatisfactory performance during the practical HER process. Here, we first reported a competitive adsorption strategy for the construction of SnO<sub>2</sub> nanoparticles doped with Ru single-atoms supported on carbon (Ru SAs-SnO<sub>2</sub> /C) via atomic galvanic replacement. SnO<sub>2</sub> was introduced to regulate the strong interaction between Ru and OH<sub>ad</sub> by the competitive adsorption of OH<sub>ad</sub> between Ru and SnO<sub>2</sub> , which alleviated the poisoning of Ru sites. As a consequence, the Ru SAs-SnO<sub>2</sub> /C exhibited a low overpotential at 10 mA cm<sup>-2</sup> (10 mV) and a low Tafel slope of 25 mV dec<sup>-1</sup> . This approach provides a new avenue to modulate the adsorption strength of active sites and intermediates, which paves the way for the development of highly active electrocatalysts.
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Single-atom catalysis of CO oxidation using Pt1/FeOx
Botao Qiao, Aiqin Wang, Xiaofeng Yang et al. · Nature Chemistry · 2011 · 7K citations
Heterogeneous Catalysis, Single-atom Catalyst, Single-atom Catalysis +2