Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 9, Issue 1, Pages 216-223Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ee02879e
Keywords
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Funding
- Australian Research Council (ARC) through the ARC Centre of Excellence for Electromaterials Science
- ARC
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Efficiently and selectively converting CO2 to value-added carbon compounds remains a major challenge in sustainable energy research. In this paper, we report the synthesis of a cost-effective catalyst, i.e. amorphous molybdenum sulphide on a polyethylenimine modified reduced graphene oxide substrate, for electrocatalytically reducing CO2 into CO in CO2 saturated aqueous NaHCO3 medium with high efficiency and selectivity. The catalyst is capable of producing CO at overpotentials as low as 140 mV and reaches a maximum faradaic efficiency of 85.1% at an overpotential of 540 mV. At an overpotential of 290 mV with respect to the formation of CO, it catalyzes the formation of syngas with high stability. Detailed investigations reveal that PEI works as a co-catalyst by providing a synergetic effect with MoSx.
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