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Title: Scalable synthesis of palladium icosahedra in plug reactors for the production of oxygen reduction reaction catalysts

Journal Article · · ChemCatChem
 [1];  [2];  [2];  [2];  [3];  [2];  [4];  [5];  [2]
  1. Georgia Inst. of Technology, Atlanta, GA (United States); Emory Univ., Atlanta, GA (United States); Donghua Univ., Shanghai (People's Republic of China)
  2. Georgia Inst. of Technology, Atlanta, GA (United States); Emory Univ., Atlanta, GA (United States)
  3. Georgia Inst. of Technology, Atlanta, GA (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  5. Donghua Univ., Shanghai (People's Republic of China)
+ Show Author Affiliations

We have synthesized Pd icosahedra with uniform, controllable sizes in plug reactors separated by air. The oxygen contained in the air segments not only contributed to the generation of a reductant from diethylene glycol in situ, but also oxidized elemental Pd back to the ionic form by oxidative etching and thus slowed down the reduction kinetics. Compared to droplet reactors involving silicone oil or fluorocarbon, the use of air as a carrier phase could reduce the production cost by avoiding additional procedures for the separation of products from the oil. The average diameters of the Pd icosahedra could be readily controlled in the range of 12–20 nm. The Pd icosahedra were further employed as seeds for the production of Pd@Pt2–3L core-shell icosahedra, which could serve as a catalyst toward the oxygen reduction reaction with greatly enhanced activity. As a result, we believe that the plug reactors could be extended to other types of noble-metal nanocrystals for their scale-up production.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1326547
Journal Information:
ChemCatChem, Vol. 8, Issue 9; ISSN 1867-3880
Publisher:
ChemPubSoc EuropeCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 16 works
Citation information provided by
Web of Science

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Cited By (6)

Keimvermitteltes Wachstum kolloidaler Metallnanokristalle journal December 2016
Seed-Mediated Growth of Colloidal Metal Nanocrystals journal December 2016
Enhanced Oxygen Reduction Activity on Carbon Supported Pd Nanoparticles Via SiO 2 journal January 2019
Continuous and Scalable Synthesis of Pt Multipods with Enhanced Electrocatalytic Activity toward the Oxygen Reduction Reaction journal March 2019
Tuning the catalytic activity of colloidal noble metal nanocrystals by using differently charged surfactants journal January 2018
Toward affordable and sustainable use of precious metals in catalysis and nanomedicine journal November 2018

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