Carbon Dioxide Hydrogenation on Ni(110)
Citations Over TimeTop 10% of 2008 papers
Abstract
We demonstrate that the key step for the reaction of CO 2 with hydrogen on Ni(110) is a change of the activated molecule coordination to the metal surface. At 90 K, CO 2 is negatively charged and chemically bonded via the carbon atom. When the temperature is increased and H approaches, the H-CO 2 complex flips and binds to the surface through the two oxygen atoms, while H binds to the carbon atom, thus yielding formate. We provide the atomic-level description of this process by means of conventional ultrahigh vacuum surface science techniques combined with density functional theory calculations and corroborated by high pressure reactivity tests. Knowledge about the details of the mechanisms involved in this reaction can yield a deeper comprehension of heterogeneous catalytic organic synthesis processes involving carbon dioxide as a reactant. We show why on Ni the CO 2 hydrogenation barrier is remarkably smaller than that on the common Cu metal-based catalyst. Our results provide a possible interpretation of the observed high catalytic activity of NiCu alloys.
Related Papers
- → Scanning Tunneling Microscopy Study of Formate Species Synthesized from CO2Hydrogenation and Prepared by Adsorption of Formic Acid over Cu(111)(2000)61 cited
- → Formate production and utilization by methanogens and by sewage sludge consortia — interference with the concept of interspecies formate transfer(1994)31 cited
- → Evidence for Isotopic Exchange during Metabolism of Stable-Isotope-Labeled Formate in a Methanogenic Sediment(1996)15 cited
- → Rhodium(I) Complexes as Useful Tools for the Activation of Fluoroolefins(2020)15 cited
- → Structure of the Formate Ion(1936)3 cited