Rhodium/silicon quantum dot/carbon quantum dot composites as highly efficient electrocatalysts for hydrogen evolution reaction with Pt-like performance

Carbon Quantum Dots Modulated NiMoP Hollow Nanopetals as Efficient Electrocatalysts for Hydrogen Evolution

“…As schematically shown in Scheme , the preparations of solid NiMoP nanoflowers and hollow NiMoP@CDs nanopetals were carried out by a facile hydrothermal method in the absence and presence of CDs, respectively. First, the nanosheets were formed under hydrothermal condition, subsequently, amounts of CDs were adhered on the surface of the NiMoP nanosheets because the abundant of −OH and -NH 2 groups that distributed on the surface of CDs could firmly fix Mo 6+ and Ni 2+ . , And the adhered −OH and -NH 2 groups could hindered the further accumulation of nanosheets, leading to the generation of hollow NiMoP@CDs nanohybrids. Conversely, the solid MoNiP nanoflowers were formed via self-assembled by lots of NiMoP nanosheets without CDs under the same reaction conditions.…”

Contribution of Carbon Dot Nanoparticles in Electrocatalysis: Development in Energy Conversion Process

“…From the experimental data, they proposed Volmer-Heyrovsky mechanism for HER. A rhodium (Rh)/silicon quantum dot/CQD nanocomposite was reported by Dang et al for HER [42]. The silicon quantum dots limited the size of Rh and prevented the aggregation and the CQDs greatly increased the electron transportation during the catalytic process.…”

Clean rhodium nanoparticles prepared by laser ablation in liquid for high performance electrocatalysis of the hydrogen evolution reaction

“…Higher overpotentials were observed for Rh nanoparticles onto silicon wires (h comprised between À84 and À129 mV at J geom ¼ À10 mA cm À2 ), 11 while h up to À36 mV (J geom ¼ À10 mA cm À2 ) were obtained with Rh/silicon quantum dot/carbon quantum dot composites. 6 The current benchmark for Rh HER electrocatalysis is constituted by Rh-Rh 2 O 3 nanoparticles supported onto nitrogen doped carbon, showing performance comparable to Pt/C (h ¼ À13 mV and À24 mV for Rh-Rh 2 O 3 and for Pt/C, respectively, at J geom ¼ À10 mA cm À2 , see Table S1 † and Fig. 3).…”

“…[1][2][3][4] The development of Rh-based nano-catalysts has thus received increasing interest, also by virtue of their compelling properties towards electrocatalysis for energy applications, in particular for the hydrogen evolution reaction (HER). [5][6][7][8][9] To this purpose, Rh nanocrystals are oen obtained by solution-based routes, either one-pot or multi-step, in environments containing salts, carbohydrates, oil, hydrouoric acid or organic solvent, [6][7][8]10,11 by various procedures such as microwave heating, 1 solvothermal, 8 sonochemical 7 or electrochemical synthesis. 1 These methods allow the achievement of the conditions required for the conversion of Rh precursor (e.g., RhCl 3 , Na 3 RhCl 6 or Rh acetate) into metal nanocrystals, typically in the presence of stabilizing agents (oleylamine), strong reducing agents (NaBH 4 ) or high temperature.…”

“…S7 and S8 in ESI †), in line with previous examples showing high robustness of Rh materials towards corrosion. 6,7 Tafel analysis on E-Rh/C and W-Rh/C materials was performed by LSV at low scan rate with rotating disk electrode (Fig. 3C).…”