In situ embedding Co9S8 into nitrogen and sulfur codoped hollow porous carbon as a bifunctional electrocatalyst for oxygen reduction and hydrogen evolution reactions

Unveiling the Origin of the High Catalytic Activity of Ultrathin 1T/2H MoSe2 Nanosheets for the Hydrogen Evolution Reaction: A Combined Experimental and Theoretical Study

“…The micromorphology of the obtaineds amples was then examined by SEM.T he SEM images of different samples synthesized using different amounts of NaBH 4 Figure S2). The reduced thickness of af ew-layer MoSe 2 could significantly increase the number of exposed active sites.…”

“…[1][2][3][4][5][6] However,t he benchmark hydrogen evolution reaction( HER) suffers from sluggish reactionk inetics owing to additional water dissociation.M any efforts have been devoted to exploring different catalytic systems and the synthesis of high-performance catalysts for improvingt he HER. 2H 2 + O 2 )i se nvisioned to satisfy the globald emandf or clean and renewable energy,a ttracting significant attentionb ecause of its potential to replace fossil fuels.…”

“…2H 2 + O 2 )i se nvisioned to satisfy the globald emandf or clean and renewable energy,a ttracting significant attentionb ecause of its potential to replace fossil fuels. [1][2][3][4][5][6] However,t he benchmark hydrogen evolution reaction( HER) suffers from sluggish reactionk inetics owing to additional water dissociation.M any efforts have been devoted to exploring different catalytic systems and the synthesis of high-performance catalysts for improvingt he HER. [7][8][9][10] Notably,t he use of transition metal dichalcogenides has been intensively investigated by Rao and co-workers.…”

Nitrogen‐Doped Cobalt Pyrite Yolk–Shell Hollow Spheres for Long‐Life Rechargeable Zn–Air Batteries

“…When compared with the sulfide-based ORR electrocatalysts reported recently (Figure 4f and Table S2, Supporting Information), the as-obtained N-CoS 2 YSSs also show strong competition in terms of activity (E 1/2 ) and kinetics (Tafel slope), such as CoS 2 NPs (0.71 V, 73.4 mV dec −1 ), [37] CoS 2 (400)/N,S-GO (0.79 V, 30 mV dec −1 ), [23] N-GQDs/NiCo 2 S 4 /CC (0.86 V, 65.8 mV dec −1 ), [17] and Co 9 S 8 @N-S-HPC (0.85 mV, 75 mV dec −1 ). [38] To understand the promotion of the yolk-shell structure and nitrogen doping on the oxygen electrocatalysis performance, the electrochemically active surface area is evaluated through the electrochemical double-layer capacitance by measuring the cyclic voltammetry (CV) curves at different scan rates ( Figure S12, Supporting Information). [39,40] As shown in Figure 4g, the N-CoS 2 YSSs show a much higher value (209.8 mF cm −2 ) than that of CoS 2 SSs (108.5 mF cm −2 ), in line with the BET results, indicating more active sites are exposed in the former.…”

Isolated Single‐Atom Ruthenium Anchored on Beta Zeolite as an Efficient Heterogeneous Catalyst for Styrene Epoxidation

“…However, it is still a grand challenge to prepare single‐atom catalysts and to prevent migration and agglomeration during catalytic process. Zeolites, a kind of aluminosilicate materials with highly uniform microporous structures, [17] is hydroxyl rich and can anchor metal atoms to resist metal sintering, making it an ideal support for single‐atom catalysts [18–22] . Moreover, the introduction of metal ions into zeolites can modify their physicochemical properties, opening many opportunities for new applications in heterogeneous catalytic field [23,24] .…”