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Efficient transfer hydrodehalogenation of halophenols catalyzed by Pd supported on ceria

Journal Article · · Applied Catalysis. A, General
 [1];  [2];  [2];  [1];  [1]
  1. Ames Laboratory, and Iowa State University, Ames, IA (United States)
  2. Ames Laboratory, Ames, IA (United States)
We report the transfer hydrodehalogenation (THD) of halophenols is efficiently catalyzed by palladium supported on high surface area ceria (Pd/CeO2) under mild conditions (65 °C) using isopropanol (iPrOH) as hydrogen source. The reactivity of 4-halophenols (4-X-PhOH) varies in the order 4-F-PhOH > 4-Cl-PhOH > 4-Br-PhOH > > 4-I-PhOH and appears to be controlled by the desorption of halides from the catalyst surface. Kinetic analysis of the reactions and temperature programmed surface reaction (TPSR) experiments indicate that oxidative addition of C-X bonds and H-abstraction from isopropoxide compete for the same active sites on Pd. The catalyst was able to conduct the THD of various hazardous pollutants and emerging contaminants (dichlorodiphenyltrichloroethane (DDT), pentachlorophenol, pentafluorophenol and triclosan).
Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
Grant/Contract Number:
AC02-07CH11358
OSTI ID:
1908946
Alternate ID(s):
OSTI ID: 1960793
Report Number(s):
IS-J-10,970
Journal Information:
Applied Catalysis. A, General, Journal Name: Applied Catalysis. A, General Vol. 650; ISSN 0926-860X
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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