Fig. 4: Hydrogenolysis results from L-ZrO2@mSiO2 and control catalysts.
From: Ultrasmall amorphous zirconia nanoparticles catalyse polyolefin hydrogenolysis
a, Time-dependent conversion of polyethylene (Mn = 20 kDa; Mw = 90 kDa; Ð = 4.8), liquid yield and volatile yield, in mass percentage, catalysed by L-ZrO2@mSiO2 under H2 at 300 °C. The data are presented as H2 quantification (means ± 1σ), as determined from three or more gas chromatography measurements. b, Carbon number distribution of liquid products from the hydrogenolysis of polyethylene catalysed by L-ZrO2@mSiO2 after 2, 4, 6, 8, 12 and 20 h. c, Comparison of C–C bond cleavage activity (left axis, hashed bars, mean ± 1σ, as determined from three H2 quantification measurements and the mass of metal loading) and conversion of polyethylene (PE; right axis, open bars, mean ± 1σ, as determined from two experiments of isolated material) at 300 °C for 6 h. d, Comparison of C–C bond cleavage reactivity for short, long, and ultra-high-molecular-weight high-density polyethylene (UHMWPE), as well as linear and branched polymers in L-ZrO2@mSiO2-catalysed hydrogenolysisσ (mean ± 1σ). e, Carbon number distribution of liquid products catalysed by L-ZrO2@mSiO2, ZrO2-30, Imp-ZrO2/mSiO2 and ZrO2-6/mSiO2, obtained from reactions that consumed similar moles of H2.
