Characterization of methylidyne on Pt(111) with infrared spectroscopy

Spectroscopic characterization of C2Hx intermediates in the dissociation of vinyl iodide on Pt(111)

“…Further annealing to temperatures around 500 K should cause ethylidyne to dehydrogenate to ethynyl (CCH) as revealed by a weak C-H stretch at 3047 cm −1 in previous studies [14,44]. However, we did not observe the presence of ethynyl here, presumably due to the overall lower ethylidyne coverage, and hence lower ethynyl coverage, compared to the earlier cases [14,44].…”

Structure and reactions of carbon and hydrogen on Ru(0001): A scanning tunneling microscopy study

“…These species adsorbed on various metal surfaces have been studied using, for example, high resolution electron energy loss spectroscopy (HREELS) [7][8][9][11][12][13][14][15], reflection adsorption infrared spectroscopy (RAIRS) [16] and temperature programmed desorption (TPD) [7][8][9]13]. Although CH, CH 2 and/or CH 3 were observed after dissociative adsorption or thermal decomposition of larger hydrocarbons [7][8][9][14][15][16], only CH could be formed by the reaction of atomic carbon and hydrogen [11][12][13]16], suggesting the high stability of CH. Because CH was also theoretically found to be most stable among the CH x species on Ru [5,6], which exhibits the highest catalytic activity in Fischer-Tropsch synthesis, hydrocarbon chain-growth using CH as a primary monomer unit has been proposed [10].…”

Single‐Crystal Adsorption Calorimetry on Well‐Defined Surfaces: From Single Crystals to Supported Nanoparticles

“…The hydrocarbon fragments CH 3,ad , CH 2,ad , and CH ad have been observed on both Pt‐supported catalysts and Pt(111) single‐crystal surfaces under UHV conditions . Alkyl halides are known to undergo facile dissociation of the carbon–halide bond on metal single‐crystal surfaces, and have therefore been used in numerous studies to investigate the binding of adsorbed hydrocarbon fragments .…”