Plasma‐Assisted Synthesis of Monodispersed and Robust Ruthenium Ultrafine Nanocatalysts for Organosilane Oxidation and Oxygen Evolution Reactions

Abstract

We report a facile and general approach for preparing ultrafine ruthenium nanocatalysts by using a plasma‐assisted synthesis at <100 °C. The resulting Ru nanoparticles are monodispersed (typical size 2 nm) and remain that way upon loading onto carbon and TiO2 supports. This gives robust catalysts with excellent activities in both organosilane oxidation and the oxygen evolution reaction.

Selective surface functionalization generating site-isolated Ir on a MnOx/N-doped carbon composite for robust electrocatalytic water oxidation

“…This material thus substantially outperforms all conventional supported noble metal OER catalysts reported to date in terms of mass activity. 41,42 A detailed performance comparison with other Ir-containing OER catalysts under both alkaline and acidic conditions can be found in Table S2. † It can be noted that the Ir-MnO x /N-C catalyst shows the lowest overpotential while demonstrating the highest mass activity at the benchmark of 10 mA cm À2 .…”

Catalyst Preparation with Plasmas: How Does It Work?

“…44,46,95−103 It can be operated near ambient conditions for some cases. 104 The DBD-decomposed Ni and Co catalysts usually show higher activity with smaller size (higher dispersion) for Ni catalysts, 44,46,97−103 in comparison to those made by thermal decomposition. An enhanced coke resistance has been achieved with DBD-made Ni catalysts for methanation, CO 2 re-forming, and steam re-forming.…”

Ruthenium Nanoparticles for Catalytic Water Splitting

“…RuO 2 NPs reported as catalysts for the OER have been prepared through diverses ynthetic methodologies that exploit the rich redox chemistryo fR u. As main preparation methods, one can cite (hydro)thermal [29][30][31][32][33] and plasma-assisted [34,35] methods, both starting from RuCl 3 ;t he decomposition of molecular precursors under oxidative (usually electrocatalytic) conditions; [12] magnetron sputtering; [8] thermal/ [36][37][38][39][40] air/ [41] electro-chemical [31] oxidationo fp reformed metallicR uN Ps;a nd chemical, [42] electrochemical, [43] or photochemical [44] reduction of RuO 4 À species. Making use of the benchmarking parameters discussed in Section 2, the electrocatalyticp erformance of the most relevant Ru-containing NP systems for the OER under acidic and basic conditions are summarized in Tables 1a nd 2, respectively.G raphical representations of h 10 /b (in which b is the slope of the Tafel plot;F igure 2) and TOF ( Figure 3) fort he same set of OER electrocatalysts are also provided and discussed in this section.…”