Electrocatalytic conversion of ethylene to ethylene oxide mediated by halide oxidation: Chloride vs. Bromide vs. Iodide

Nan Nan Liang; Wonjung Choi; Dong Suk Han; Hyunwoong Park

doi:10.1016/j.cej.2024.153042

Electrocatalytic conversion of ethylene to ethylene oxide mediated by halide oxidation: Chloride vs. Bromide vs. Iodide

Nan Nan Liang, Wonjung Choi, Dong Suk Han, Hyunwoong Park

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Ethylene oxide (EO) is among the most extensively used chemicals and is conventionally produced via the thermochemical oxidation of ethylene. This study demonstrates that a Pt-doped RuO₂ and TiO₂ composite (Pt-RuO₂/TiO₂) electrocatalyst drives ethylene oxidation to EO in the presence of reactive chlorine and bromine species in aqueous chloride and bromide solutions at Faradaic efficiencies (FEs) of ∼100 % and ∼90 %, respectively. Despite a lower FE, the bromine production is more feasible than the chlorine production and the as-formed bromine species remains stable for postreaction with ethylene. The iodine species exhibits a low reactivity toward ethylene. The activity of Pt-RuO₂/TiO₂ is substantially higher than that of other catalysts. Membraned and membraneless flow electrolyzers with a Pt-RuO₂/TiO₂ anode for ethylene oxidation and a Pt/C cathode for oxygen reduction are demonstrated at J = 500 mA cm⁻². Technoeconomic analysis reveals reduction in the production cost of EO by 10 % with the membraneless electrolyzer.

Original language	English
Article number	153042
Journal	Chemical Engineering Journal
Volume	494
DOIs	https://doi.org/10.1016/j.cej.2024.153042
State	Published - 15 Aug 2024

Keywords

Electrocatalysis
Ethylene
Green synthesis
Halogen species
Partial oxidation

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title = "Electrocatalytic conversion of ethylene to ethylene oxide mediated by halide oxidation: Chloride vs. Bromide vs. Iodide",

abstract = "Ethylene oxide (EO) is among the most extensively used chemicals and is conventionally produced via the thermochemical oxidation of ethylene. This study demonstrates that a Pt-doped RuO2 and TiO2 composite (Pt-RuO2/TiO2) electrocatalyst drives ethylene oxidation to EO in the presence of reactive chlorine and bromine species in aqueous chloride and bromide solutions at Faradaic efficiencies (FEs) of ∼100 % and ∼90 %, respectively. Despite a lower FE, the bromine production is more feasible than the chlorine production and the as-formed bromine species remains stable for postreaction with ethylene. The iodine species exhibits a low reactivity toward ethylene. The activity of Pt-RuO2/TiO2 is substantially higher than that of other catalysts. Membraned and membraneless flow electrolyzers with a Pt-RuO2/TiO2 anode for ethylene oxidation and a Pt/C cathode for oxygen reduction are demonstrated at J = 500 mA cm−2. Technoeconomic analysis reveals reduction in the production cost of EO by 10 % with the membraneless electrolyzer.",

keywords = "Electrocatalysis, Ethylene, Green synthesis, Halogen species, Partial oxidation",

author = "Liang, {Nan Nan} and Wonjung Choi and {Suk Han}, Dong and Hyunwoong Park",

note = "Publisher Copyright: {\textcopyright} 2024 Elsevier B.V.",

year = "2024",

month = aug,

day = "15",

doi = "10.1016/j.cej.2024.153042",

language = "English",

volume = "494",

journal = "Chemical Engineering Journal",

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T1 - Electrocatalytic conversion of ethylene to ethylene oxide mediated by halide oxidation

T2 - Chloride vs. Bromide vs. Iodide

AU - Liang, Nan Nan

AU - Choi, Wonjung

AU - Suk Han, Dong

AU - Park, Hyunwoong

PY - 2024/8/15

Y1 - 2024/8/15

N2 - Ethylene oxide (EO) is among the most extensively used chemicals and is conventionally produced via the thermochemical oxidation of ethylene. This study demonstrates that a Pt-doped RuO2 and TiO2 composite (Pt-RuO2/TiO2) electrocatalyst drives ethylene oxidation to EO in the presence of reactive chlorine and bromine species in aqueous chloride and bromide solutions at Faradaic efficiencies (FEs) of ∼100 % and ∼90 %, respectively. Despite a lower FE, the bromine production is more feasible than the chlorine production and the as-formed bromine species remains stable for postreaction with ethylene. The iodine species exhibits a low reactivity toward ethylene. The activity of Pt-RuO2/TiO2 is substantially higher than that of other catalysts. Membraned and membraneless flow electrolyzers with a Pt-RuO2/TiO2 anode for ethylene oxidation and a Pt/C cathode for oxygen reduction are demonstrated at J = 500 mA cm−2. Technoeconomic analysis reveals reduction in the production cost of EO by 10 % with the membraneless electrolyzer.

AB - Ethylene oxide (EO) is among the most extensively used chemicals and is conventionally produced via the thermochemical oxidation of ethylene. This study demonstrates that a Pt-doped RuO2 and TiO2 composite (Pt-RuO2/TiO2) electrocatalyst drives ethylene oxidation to EO in the presence of reactive chlorine and bromine species in aqueous chloride and bromide solutions at Faradaic efficiencies (FEs) of ∼100 % and ∼90 %, respectively. Despite a lower FE, the bromine production is more feasible than the chlorine production and the as-formed bromine species remains stable for postreaction with ethylene. The iodine species exhibits a low reactivity toward ethylene. The activity of Pt-RuO2/TiO2 is substantially higher than that of other catalysts. Membraned and membraneless flow electrolyzers with a Pt-RuO2/TiO2 anode for ethylene oxidation and a Pt/C cathode for oxygen reduction are demonstrated at J = 500 mA cm−2. Technoeconomic analysis reveals reduction in the production cost of EO by 10 % with the membraneless electrolyzer.

KW - Electrocatalysis

KW - Ethylene

KW - Green synthesis

KW - Halogen species

KW - Partial oxidation

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DO - 10.1016/j.cej.2024.153042

M3 - Article

AN - SCOPUS:85196026601

SN - 1385-8947

VL - 494

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

M1 - 153042

ER -

Electrocatalytic conversion of ethylene to ethylene oxide mediated by halide oxidation: Chloride vs. Bromide vs. Iodide

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Keywords

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