PdPt Alloy Nanocatalysts Supported on TiO₂: Maneuvering Metal–Hydrogen Interactions for Light‐Driven and Water‐Donating Selective Alkyne Semihydrogenation

Abstract

Low power consumption and minimal potential hazards are ultimate goals for the modern development of chemical manufacturing; however, it often reduces the selectivity of chemical reactions by implementing a new reaction system. A nanocatalyst design is reported for achieving efficient and selective alkyne semihydrogenation through the photocatalytic hydrogen transfer from water, which avoids the use of a heat source and explosive H . The PdPt catalytic sites that are implemented on the TiO photocatalyst hold the key to achieving both high activity and selectivity. As compared with pure Pd or Pt, the alloy cocatalysts can better harness H diffusion/desorption for selective semihydrogenation as well as suppress competitive H evolution. This work opens up new possibilities for green and selective alkyne semihydrogenation and highlights the importance of lattice engineering to catalytic selectivity.

Controlling Au–Pd Surface on Au Nanocubes for Selective Catalytic Alkyne Semihydrogenation

“…Catalytic semihydrogenation of alkynes has attracted widespread interest owing to its industrial and commercial applications . To improve the activity and selectivity of reactions, various types of catalytic nanostructures have been investigated for the semihydrogenation of alkynes . Ideally well‐designed nanostructures may offer numerous benefits including lower energy consumption requirements, higher atomic economy, and more controllable reaction pathways in catalysis.…”

“…Most recently, bimetallic nanocatalysts have been designed for catalytic hydrogenation reactions by manipulating the interactions of metals and H 2 /H ad . For example, the interstitial modification of Pd in PdAu alloy would alter the desorption of H ad and the hydrogenation barrier of alkene .…”

Boosting Photocatalytic Activity in Cross‐Coupling Reactions by Constructing Pd‐Oxide Heterostructures

“…A typical photocatalyst design is palladium supported on semiconductors, which relies primarily on photogenerated electrons from semiconductor to promote catalytic reactions . However, current model catalysts have been mainly concerned on Suzuki coupling reactions and hydrogenation reactions, which can easily take place in mild reaction conditions . Only limited reports investigated the photocatalytic properties of supported palladium catalysts in the coupling reactions that require higher energy input, such as Heck reaction and Sonogashira reaction .…”

Polymeric Encapsulation of Turmeric Extract for Bioimaging and Antimicrobial Applications

“…In the past few decades, functional materials (inorganic, organic, polymeric, or their combinations) have attracted great attention for their unique properties . As a response to the increasing societal awareness on sustainability, researchers are paying much more attention in developing green chemistry methodology for the preparation of functional materials .…”