Sulfur promotes hydrogen evolution on molybdenum carbide catalysts

Abstract

We report that sulfur-doping of molybdenum carbide catalysts produces a good hydrogen evolution electrocatalyst. The doped sulfur atoms weaken the hydrogen bonding energy, enhancing the catalyst's activity in hydrogen evolution.

Synergistic Catalyst Design for Enhanced Electrochemical Hydrogen Evolution: Fe2O3/MoS2/Ti3C2Tx MXene Ternary Composite

“…Further study of Fe 2 O 3 /MoS 2 (mixed phase of MoS 2 and Fe 2 O 3 ) shows that sites 1 and 2 have Δ G H values of 0.17 and 0.21 eV, respectively (site 3 shows poisoning for H adsorption in Fe 2 O 3 , so it is not studied in Fe 2 O 3 /MoS 2 ). This result is consistent with the previously suggested reports that the introduction of Fe or S systems may help tune the catalytic activity. , …”

Anion-exchange synthesis of an MnCo2S4 electrocatalyst towards facilitated ultralong hydrogen evolution reaction in acidic and alkaline media

“…[23][24][25][26] Among these, sulfide formation is facile and could be more promising because the lone pair electrons in 3p and untenanted 3d orbital of sulfur are believed to facilitate the surface charge of the MnCo 2 S 4 catalyst, thereby enhancing HER activity. 27,28 Besides, the direct growth of the catalyst material on the three-dimensional (3D) nickel foam (NF) architecture could show better conductive and stable network for the efficient electron/ion transport. 29 Based on above mentioned key concept and consideration, we demonstrate the direct growth of non-precious 2D MnCo 2 -O 4 nanosheets on NF substrate and effectively transformed into hierarchical MnCo 2 S 4 nanosheets via the anion-exchange process.…”

“…23–26 Among these, sulfide formation is facile and could be more promising because the lone pair electrons in 3p and untenanted 3d orbital of sulfur are believed to facilitate the surface charge of the MnCo 2 S 4 catalyst, thereby enhancing HER activity. 27,28 Besides, the direct growth of the catalyst material on the three-dimensional (3D) nickel foam (NF) architecture could show better conductive and stable network for the efficient electron/ion transport. 29…”