Potter ME, Mediavilla Madrigal S, Campbell E, Allen LJ, Vyas U, Parry S, García‐Zaragova A, Martínez‐Prieto LM, Oña‐Burgos P, Lützen M, Damsgaard CD, Rodríguez‐Castellón E, Schiaroli N, Fornasari G, Benito P, Beale AM. A High Pressure Operando Spectroscopy Examination of Bimetal Interactions in 'Metal Efficient' Palladium/In
2 O
3 /Al
2 O
3 Catalysts for CO
2 Hydrogenation.
Angew Chem Int Ed Engl 2023;
62:e202312645. [PMID:
37723118 PMCID:
PMC10952604 DOI:
10.1002/anie.202312645]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 09/18/2023] [Accepted: 09/18/2023] [Indexed: 09/20/2023]
Abstract
CO2 hydrogenation to methanol has the potential to serve as a sustainable route to a wide variety of hydrocarbons, fuels and plastics in the quest for net zero. Synergistic Pd/In2 O3 (Palldium on Indium Oxide) catalysts show high CO2 conversion and methanol selectivity, enhancing methanol yield. The identity of the optimal active site for this reaction is unclear, either as a Pd-In alloy, proximate metals, or distinct sites. In this work, we demonstrate that metal-efficient Pd/In2 O3 species dispersed on Al2 O3 can match the performance of pure Pd/In2 O3 systems. Further, we follow the evolution of both Pd and In sites, and surface species, under operando reaction conditions using X-ray Absorption Spectroscpy (XAS) and infrared (IR) spectroscopy. In doing so, we can determine both the nature of the active sites and the influence on the catalytic mechanism.
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