The cooperative desorption of H₂O and CO with 100% selectivity from co-adsorbed cobalt oxide clusters Co_xO_yH₂OCO⁺ [(x,y) = (3,3), (5,7), (6,9), and (9,12)] upon photo excitation at 355 nm was identified by mass spectrometry. In contrast, sole desorption of CO dominated the mass spectra of Co₃O₃H₂OCO⁺ upon collisional excitation by Xe at a wide range of center-of-mass collisional energies. The experiments and further kinetic modeling proposed photo-catalytic coupling of H₂O and CO on the cobalt oxide clusters. Combined with theoretical studies, a mechanism for photo-catalytic coupling of dissociatively adsorbed H₂O and CO is proposed.

H ₂ O和CO以100％的选择性从共吸附的氧化钴簇Co _x O _y H ₂ OCO ⁺ [（x，y）=（3,3），（5,7），（6， 9）和（9,12）]通过质谱法鉴定了在355nm下的光激发。相反，在宽范围的质心碰撞能量范围内，当Xe碰撞激发时，CO的唯一脱附占Co ₃ O ₃ H ₂ OCO ⁺的质谱。实验和进一步的动力学建模提出了H _2的光催化偶合氧化钴簇上的O和CO。结合理论研究，提出了离解吸附的H ₂ O和CO的光催化偶合机理。