Tandem In ₂ O ₃ -Pt/Al ₂ O ₃ catalyst for coupling of propane dehydrogenation to selective H ₂ combustion

Abstract

Tandem catalysis couples multiple reactions and promises to improve chemical processing, but precise spatiotemporal control over reactive intermediates remains elusive. We used atomic layer deposition to grow In2O3 over Pt/Al2O3, and this nanostructure kinetically couples the domains through surface hydrogen atom transfer, resulting in propane dehydrogenation (PDH) to propylene by platinum, then selective hydrogen combustion by In2O3, without excessive hydrocarbon combustion. Other nanostructures, including platinum on In2O3 or platinum mixed with In2O3, favor propane combustion because they cannot organize the reactions sequentially. The net effect is rapid and stable oxidative dehydrogenation of propane at high per-pass yields exceeding the PDH equilibrium. Tandem catalysis using this nanoscale overcoating geometry is validated as an opportunity for highly selective catalytic performance in a grand challenge reaction.

Light olefin synthesis from a diversity of renewable and fossil feedstocks: state-of the-art and outlook

“…A tandem In 2 O 3 –Pt/Al 2 O 3 catalyst was proposed, where platinum nanoclusters were responsible for the DDH of propane, while indium oxide took part in the oxidation of released hydrogen. 137 The authors covered Pt/alumina catalyst by indium oxide via atomic layer deposition and reached an yield of >30% by the careful material design. Overcoating led to the performance similar to the non-platinum system showing hindering of the reagents' access to the metallic surface (Fig.…”

Splicing the active phases of copper/cobalt-based catalysts achieves high-rate tandem electroreduction of nitrate to ammonia

“…In this work, we introduce a facile electrochemically driven phase-separation strategy for a tandem catalyst design, which, different from previous approaches based on sequential assembling or deposition 60 , 61 , enables the in situ formation of multiple active intermediate phases and rich phase interfaces for rapid spillover and transport of reaction intermediates. As a proof-of-concept, we implemented this catalyst synthesis strategy by the electrochemical transformation of pre−synthesized Cu–Co binary metal sulfides into core–shell Cu/CuO x and Co/CoO phases on Cu foil.…”

Atomic Interface‐Exciting Catalysis on Cobalt Nitride‐Oxide for Accelerating Hydrogen Generation

“…[24] A Pt/Al 2 O 3 interfacial nanostructure expresses effective propane dehydrogenation to propylene via coupling to the selective hydrogen combustion without excessive hydrocarbon combustion on In 2 O 3 component. [25] A bifunctional interfacial Ir 1 −In 2 O 3 catalyst has been reported to integrate two active catalytic centers by anchoring the monatomic Ir onto In 2 O 3 support, with an excellent initial turnover frequency for the liquid-phase hydrogenation of CO 2 . [26] Meanwhile, rational design of two-component interfacial metal catalysts is considered to be an effective method to improve hydrogen release activity.…”