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(a) FTIR spectra from bare Pd/C catalyst (black line), free phenylacetylene (purple), and phenylacetylene preadsorbed on Pd/C (grey). (b) FTIR spectra equivalent to (a), but with styrene (blue). (c) and (d) analogue FTIR spectra with the PdIn-QT catalyst (green) and preadsorbed molecules (dark green).
