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Reducing-Agent-Free Instant Synthesis of Carbon-Supported Pd Catalysts in a Green Leidenfrost Droplet Reactor and Catalytic Activity in Formic Acid Dehydrogenation. | LitMetric

AI Article Synopsis

  • - The study focuses on creating sustainable methods for synthesizing carbon-supported palladium (Pd) catalysts using a green Leidenfrost droplet reactor, avoiding traditional, energy-intensive processes.
  • - In this method, Pd nanoparticles are formed in a levitating droplet on a hot surface, allowing for synthesis without reducing agents and leading to a more eco-friendly and efficient process.
  • - The resulting catalysts demonstrate significantly improved catalytic activity for room-temperature formic acid decomposition compared to those made through conventional methods, highlighting the effectiveness of this new approach.

Article Abstract

The development of green synthesis methods for supported noble metal catalysts remains important challenges to improve their sustainability. Here we first synthesized carbon-supported Pd catalysts in a green Leidenfrost droplet reactor without reducing agents, high-temperature calcination and reduction procedures. When the aqueous solution containing Pd nitrate precursor, carbon support, and water is dripped on a hot plate, vapor layer is formed between a solution droplet and hot surface, which allow the solution droplet to be levitated on the hot surface (Leidenfrost phenomena). Subsequently, Pd nanoparticles can be prepared without reducing agents in a weakly basic droplet reactor created by the Leidenfrost phenomena, and then the as-prepared Pd nanoparticles are loaded on carbon supports during boiling down the droplet on hot surface. Compared to conventional incipient wetness and chemical synthetic methods, the Leidenfrost droplet reactor does not need energy-consuming, time-consuming, and environmentally unfriendly procedures, which leads to much shorter synthesis time, lower carbon dioxide emission, and more ecofriendly process in comparison with conventional synthesis methods. Moreover, the catalysts synthesized in the Leidenfrost droplet reactor provided much better catalytic activity for room-temperature formic acid decomposition than those prepared by the incipient wetness method.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4873793PMC
http://dx.doi.org/10.1038/srep26474DOI Listing

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