Hydrogenation of carbon monoxide on the Ru(OO1) surface has been investigated using high-resolution electron energy loss spectroscopy and temperature-programmed desorption. Exposing gas-phase atomic hydrogen to a saturated carbon monoxide overlayer at 100 K results in reaction (via Eley-Rideal kinetics) under ultrahigh vacuum conditions. Both ql-and q2-formyl are clearly identified as initial reaction products at low atomic exposures. At higher exposures the production of q2-formaldehyde is observed. Annealing to 180 K decomposes some of the vl-formyl, leading to adsorbed CO and hydrogen desorption, with the remainder of the 7'-formyl converting to $-formyl. Upon annealing to 220 K, the $-formaldehyde decomposes to adsorbed CO and hydrogen which desorbs. Further annealing to 250 K leads to complete decomposition of the q2-formyl, resulting in hydrogen desorption and regeneration of the original CO overlayer. These identifications represent the first spectroscopic observation of a carbonyl insertion channel operating during carbon monoxide hydrogenation on a well-characterized transition metal surface.

CsPbBr3 quantum dots were precipitated in phosphate glasses through heat treatment. Controlled formation of CsPbBr3 quantum dots was realized by adjustment of heat‐treatment conditions. Absorption and photoluminescence spectra of CsPbBr3 quantum dots were tuned from 432 to 521 nm. Upon ultraviolet or blue light excitation, efficient photoluminescence from these CsPbBr3 quantum dots doped phosphate glasses was observed.

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