Synthesis, testing and characterisation of silica-supported nickel phosphide reverse water-gas shift catalysts with varying Ni/P atomic ratios: supplementary materials
Silica-supported nickel phosphide catalysts with varying Ni/P atomic ratios (12/5, 2, 1, and 0.5) and 15 wt.% Ni-loading are synthesized. The synthesized catalysts are calcined and subjected to Temperature Programmed Reduction (TPR) analysis to evaluate Hydrogen consumption. Pre-reaction X-ray diffraction (XRD) analysis is performed on all calcined samples after reduction and passivation. The reduced catalysts are tested for the reverse water-gas shift reaction and post-reaction XRD analysis is performed on them. Stability tests are conducted on catalysts with Ni/P atomic ratios of 12/5 and 2, followed by XRD analysis of post-stability samples. The elemental composition of the catalysts at each stage is evaluated via inductively coupled plasma mass spectroscopy (ICP-MS) analysis. All experimental data is made available for re-use through this platform.
Steps to reproduce
The datasets presented were obtained through the following experimental steps. These steps can also be used to reproduce the data, although some variations may be observed due to the inherent variability of experimental results: 1) Catalysts were synthesized using the wet impregnation method. 2) Some of the calcined catalysts were subjected to TPR characterization (results available in the file '1 - TPR'), while others were reduced and passivated. 3) XRD analysis was performed on the reduced and passivated catalysts (results presented in the file '2 - Pre-reduction-reduced-sample-XRD'). 4) The reduced catalysts were then tested for their reverse water-gas shift activity (results recorded in '3 - Activity Testing'). XRD analysis was performed again on these catalysts (results presented in '4 - Post-activity XRD'). 5) Catalysts with the best activity results underwent stability testing (results compiled in '5 - Stability Testing'), and XRD was performed on these samples (results recorded in '6 - Post-stability XRD'). 6) Finally, the elemental composition of the catalysts was analyzed using ICP-MS (results presented in the file '7 - ICP-MS analysis'). 7) Reference PDFs for the phases detected in XRD are provided in the file '8 - Reference PDFs for the Phases detected in XRD'.
Royal Society of Chemistry