Tailoring tin sulfide electrocatalyst with petroleum coke derived reduced graphene oxide for overall water splitting

Kumar, Chandan; Ibomcha Singh, Thangjam; Saharan, Pinky; Gupta, Ashish; Singh, Jogender; Singh, Mandeep; Dhakate, S.R.

doi:10.1016/j.flatc.2024.100689

Cited by 1 publication

(1 citation statement)

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“…The M-Ss can be made much more porous, conductive, and electrochemical active by hybridizing through porous and conductive nanomaterials such as carbon-based materials (reduced graphene oxide (rGO), carbon nanofibers, and carbon nanotubes) as well as enhancing the d-spacing. 12 In particular, in situ substitution of Co into SnS can create defects and sulfur deficiency due to the creation of cobalt sulfide over the SnS. 13,14 Moreover, ultrathin rGO nanosheets can promote the formation of protective layers and the electrical conductivity and improves the SSA of Co-substituted SnS.…”

Section: Introductionmentioning

confidence: 99%

Cobalt Substitution on SnS-rGO Composites for Efficient Oxygen and Hydrogen Evolution Reactions

Kumar,

Saharan,

Singh

et al. 2024

Energy Fuels

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To overcome the high cost of established electrocatalysts (viz., Pt/C and RuO2), there is a pressing need to replace them with highly efficient, cost-effective, and sustainable electrocatalysts. In this study, a series of Co-substituted orthorhombic tin sulfide-reduced graphene oxide (SnS-rGO) [CTSx-rGO, (x: 0.1 to 0.3)] catalysts were produced via a one-pot hydrothermal process. In potassium hydroxide (1.0 mol/L), CTSx-rGO acts as a highly competent and stable catalyst for both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) owing to the cumulative effect of Co and SnS-rGO composites. Co substitution improves the electrochemical active surface area (ECSA), reduces the R ct (charge-transfer resistance), and tunes the electronic configuration. The resulting CTS0.2-rGO composite exhibited exceptional performance toward the OER and HER activities by offering relatively small overpotentials of 323.0 and 233.1 mV at 20 mA/cm2, respectively, with long-term stability up to 50 h and high ECSA that is attributable to the improvement of the specific surface area and ample active sites resulting from the in situ structural and morphology change in SnS-rGO with Co substitution. This work facilitates and strengthens the development of an efficient Co-substituted SnS-rGO-based heterostructure electrocatalyst for overall water splitting.

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Section: Introductionmentioning

confidence: 99%