Molybdenum carbide on hierarchical porous carbon synthesized from Cu-MoO2 as efficient electrocatalysts for electrochemical hydrogen generation

Porous Molybdenum Carbide Nanostructures Synthesized on Carbon Cloth by CVD for Efficient Hydrogen Production

“…For comparison, we plotted h 10 as af unction of growth temperature (Figure 6c). As the growth temperature increased from 700 to 850 8C, h 10 was decreased from 177 mV to 72 mV.T he improved activity of Mo 2 C-850(50) was attributed to the increased amounto fM o 2 Ca th igh growth temperature, which hasb etter activity than MoO 2 [11] and large surfacea rea due to the porous nanostructure. When furtheri ncreasingg rowth temperature, h 10 was increased to 95 and 100 mV for Mo 2 C-900 and Mo 2 C-950, respectively.T he de-creasedH ER activities of Mo 2 C-900 and Mo 2 C-950c ould be attributed to the loss of porous nanostructure by aggregation of Mo 2 Ca th igh growth temperature (see SEM images of Figure 4k and m), which decreaseds urfacea rea.…”

“…As the growth temperature increased from 700 to 850 °C, η 10 was decreased from 177 mV to 72 mV. The improved activity of Mo 2 C‐850(50) was attributed to the increased amount of Mo 2 C at high growth temperature, which has better activity than MoO 2 and large surface area due to the porous nanostructure. When further increasing growth temperature, η 10 was increased to 95 and 100 mV for Mo 2 C‐900 and Mo 2 C‐950, respectively.…”

“…Recently, remarkable advances have been made regarding the use of transition metals and their carbides, borides, phosphides, nitrides and chalcogenides, due to their high activity, outstanding stability and earth abundance . Among these transition metal compounds, molybdenum carbide (Mo 2 C) has distinctive merits of noble‐metal‐like electronic configuration, high electronic conductivity, wide pH applicability, more importantly outstanding HER activity and stability .…”

“…This work provides an ovel strategy for synthesizingM o 2 Ca nd other efficient carbide electrocatalysts for HER and other applications,s uch as supercapacitors and lithium-ion batteries. Recently,r emarkable advances have been made regarding the use of transitionm etals [8,9] and their carbides, [10][11][12][13] borides, [14,15] phosphides, [16,17] nitrides [18,19] and chalcogenides, [20,21] due to their high activity,o utstandings tabilitya nd earth abundance. [22][23][24][25] Amongt hese transition metal compounds, molybdenumc arbide( Mo 2 C) has distinctive merits of noble-metallike electronic configuration, high electronic conductivity,w ide pH applicability, more importantly outstanding HER activity and stability.…”

Designing Metallic MoO2 Nanostructures on Rigid Substrates for Electrochemical Water Activation

“…Thus, H-MoO 2 powder with the lowest R ct among the variouss amples shows the highest HER activity.T he electrochemicalsurfacearea determined from the double-layercapacitance measurement ( Figure S23) is higher for the H-MoO 2 powder, leadingt ofaster reactionkinetics. [39] We have tried to understand the drastic improvementi nt he HER activity after hydrogen annealing. It has been reported that during hydrogen annealing of MoO 3 ,h ydrogen intercalates into the layerstoform H x MoO 3 ,which slowly decomposes into MoO 2 .…”