Infrared multiple photon dissociation spectroscopy (IR‐MPD) has been employed to determine the nature of CO₂ binding to size‐selected platinum cluster anions, Pt_n⁻ (n=4–7). Interpreted in conjunction with density functional theory simulations, the results illustrate that the degree of CO₂ activation can be controlled by the size of the metal cluster, with dissociative activation observed on all clusters n≥5. Of potential practical significance, in terms of the use of CO₂ as a useful C1 feedstock, CO₂ is observed molecularly‐bound, but highly activated, on the Pt₄⁻ cluster. It is trapped behind a barrier on the reactive potential energy surface which prevents dissociation.

中文翻译：

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小型铂簇阴离子Ptn-的尺寸选择性CO2活化的IR签名（n = 4-7）

红外多个光子解离光谱（IR-MPD）已被用来确定CO的性质₂结合大小选择的铂簇阴离子，铂_ñ ^- （Ñ = 4-7）。与密度泛函理论模拟相结合的解释，该结果说明，CO的程度₂活化可以通过将金属簇的大小，对所有集群观察解离活化来控制Ñ ≥5。的电位的实际意义，在使用CO的方面₂作为一个有用的C1原料，CO ₂中观察到的分子结合的，但高度活化的，在Pt ₄ ^-簇。它被束缚在无功势能表面的势垒后面，该势垒阻止了解离。