MoSe2-GO/rGO Composite Catalyst for Hydrogen Evolution Reaction

Abstract

There has been considerable research to engineer composites of transition metal dichalcogenides with other materials to improve their catalytic performance. In this work, we present a modified solution-processed method for the formation of molybdenum selenide (MoSe2) nanosheets and a facile method of structuring composites with graphene oxide (GO) or reduced graphene oxide (rGO) at different ratios to prevent aggregation of the MoSe2 nanosheets and hence improve their electrocatalytic hydrogen evolution reaction performance. The prepared GO, rGO, and MoSe2 nanosheets were characterized by X-ray powder diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, and scanning electron microscopy. The electrocatalytic performance results showed that the pure MoSe2 nanosheets exhibited a somewhat high Tafel slope of 80 mV/dec, whereas the MoSe2-GO and MoSe2-rGO composites showed lower Tafel slopes of 57 and 67 mV/dec at ratios of 6:4 and 4:6, respectively. We attribute the improved catalytic effects to the better contact and faster carrier transfer between the edge of MoSe2 and the electrode due to the addition of GO or rGO.

Direct electrodeposition of Ni‐Co‐S on carbon paper as an efficient cathode for anion exchange membrane water electrolysers

“…All electrodes demonstrated a small semicircle diameter, whereas the one deposited for 1800 seconds displayed a minimum R ct of 1.9 Ω. The small R ct of the Ni‐Co‐S demonstrated the fast charge transfer at the electrode/electrolyte interface as well as the high conductivity of the electrodeposits 56‐59 …”

“…The small R ct of the Ni-Co-S demonstrated the fast charge transfer at the electrode/electrolyte interface as well as the high conductivity of the electrodeposits. [56][57][58][59]…”

Facile synthesis of Ni-incorporated and nitrogen-doped reduced graphene oxide as an effective electrode material for tri(ammonium) phosphate electro-oxidation

“…Of course, water is the optimum source of hydrogen especially from the environmental point of view, but the water splitting technology stills far from the wide commercial scale due to the high required cost of the required electrical energy 7 . On the other hand, the reported photocatalyst for the water photo-splitting process did not satisfy all the requirements 8 .…”

Novel Architecture Titanium Carbide (Ti3C2Tx) MXene Cocatalysts toward Photocatalytic Hydrogen Production: A Mini-Review

“…To date, sustainable solar hydrogen (H 2 ) production, which directly produces by utilizing semiconductor photocatalysts, could provide a promising and environmental-friendly approach to solve the worldwide energy issues and reduce the dependence on fossil fuels [1,2]. Particularly, enormous progress has been made in developing a new system of photocatalysts such as transition metal dichalcogenides [3][4][5][6][7][8][9][10][11][12][13][14][15], transition metal oxide (TMOs) [16,17], transient metal sulfides (TMSs), graphitic carbon nitride (g-C 3 N 4 ) [18][19][20][21][22], metal-organic framework (MOFs) [23][24][25], transition metal nitride (TMNs) [26], and transition metal carbide (TMCs) [27][28][29][30] that could efficiently enhance the H 2 production, and readily scale up for commercialization [2].…”