Reactivity of formic acid (HCOOD and DCOOH) at uranium and UO2.0 surfaces

The structures of physisorbed and chemisorbed formic acid on Si(111)-7×7

“…Formic acid is the simplest carboxylic acid and can serve as a model system for other organic acids with more complicated chemical structures [4]. The adsorption of formic acid on many metals {Ag(1 1 1) [5], Mo(1 1 0) [6], Rh(1 1 1) [7], Cu(1 1 0) [8], Cu(1 0 0) [9], Ni(1 1 0) [10], Uranium [11], Fe(1 0 0) [12], Mo(1 0 0) [13], Pt(1 1 1) [14]} was extensively investigated with X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS), electron energy loss spectroscopy (EELS), thermal desorption spectroscopy (TDS) and reflection absorption infrared spectroscopy (RAIRS) techniques. These previous experiments showed that on most metal surfaces formic acid dissociates to form formate species, which then decomposes to CO 2 and H 2 by dehydrogenation or CO and H 2 O by dehydration at a raised temperature.…”