Hybrid CoMoS - polyaniline nanowires catalysts for hydrodesulfurisation applications

Catalytic performances of promoted CoMoS catalysts were greatly improved via a synthesis strategy based on the structuration of the active phase using self-assembled PANI (Polyaniline) nanowires followed by an addition step of cobalt acetylacetonate on oxidic or sulfided Mo-based hybrids. Taking into account the different promotion levels, slabs lengths determined by XPS and TEM, the highest rate constants normalized by mol of (MoS2)(edges+corner) in the hydrodesulfurization of 3-methylthiophene were obtained when Co(acac)(2) is deposited on a MoS3/PANI hybrid precursor. The normalized HDS rate constants for the different samples followed the increase in Co/Moedges+corner atomic ratios whereas an optimum for HDS/HYD selectivity in the same ratio was observed.

Automated summary

The catalytic performances of promoted CoMoS catalysts were greatly improved by structuring the active phase using self-assembled PANI nanowires, followed by the addition of cobalt acetylacetonate on oxidic or sulfided Mo-based hybrids. The highest rate constants normalized by mol of (MoS2)(edges+corner) in the hydrodesulfurization of 3-methylthiophene were obtained when Co(acac)(2) was deposited on a MoS3/PANI hybrid precursor. The normalized HDS rate constants for the different samples increased with the Co/Moedges+corner atomic ratios, with an optimum observed for HDS/HYD selectivity in the same ratio.