High-Rate and Efficient Ethylene Electrosynthesis Using a Catalyst/Promoter/Transport Layer

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2020
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Ozden, Adnan
Li, Fengwang
Pelayo García de Arquer, Francisco
Rosas-Hernández, Alonso
Li, Jun
Agapie, Theodor
Peters, Jonas C.
Sargent, Edward H.
Sinton, David
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European Union (EU): 793471
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COOLEFIN: Novel Dinuclear Late Transition Metal Catalysts for CO2/Olefin and CO2/Epoxide/olefin Copolymerization
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ACS Energy Letters. American Chemical Society (ACS). 2020, 5(9), pp. 2811-2818. eISSN 2380-8195. Available under: doi: 10.1021/acsenergylett.0c01266
Zusammenfassung

Carbon dioxide (CO2) electroreduction to valuable chemicals such as ethylene is an avenue to store renewable electricity and close the carbon cycle. Membrane electrode assembly (MEA) electrolyzers have attracted recent interest in light of their high stability and despite low productivity (a modest partial current density in CO2-to-ethylene conversion of approximately 100 mA cm–2). Here we present an adlayer functionalization catalyst design: a catalyst/tetrahydro-phenanthrolinium/ionomer (CTPI) interface in which the catalytically active copper is functionalized using a phenanthrolinium-derived film and a perfluorocarbon-based polymeric ionomer. We find, using electroanalytical tools and operando spectroscopies, that this hierarchical adlayer augments both the local CO2 availability and the adsorption of the key reaction intermediate CO on the catalyst surface. Using this CTPI catalyst, we achieve an ethylene Faradaic efficiency of 66% at a partial current density of 208 mA cm–2—a 2-fold increase over the best prior MEA electrolyzer report—and an improved full-cell energy efficiency of 21%.

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ISO 690OZDEN, Adnan, Fengwang LI, Francisco PELAYO GARCÍA DE ARQUER, Alonso ROSAS-HERNÁNDEZ, Arnaud THEVENON, Jun LI, Theodor AGAPIE, Jonas C. PETERS, Edward H. SARGENT, David SINTON, 2020. High-Rate and Efficient Ethylene Electrosynthesis Using a Catalyst/Promoter/Transport Layer. In: ACS Energy Letters. American Chemical Society (ACS). 2020, 5(9), pp. 2811-2818. eISSN 2380-8195. Available under: doi: 10.1021/acsenergylett.0c01266
BibTex
@article{Ozden2020HighR-53864,
  year={2020},
  doi={10.1021/acsenergylett.0c01266},
  title={High-Rate and Efficient Ethylene Electrosynthesis Using a Catalyst/Promoter/Transport Layer},
  number={9},
  volume={5},
  journal={ACS Energy Letters},
  pages={2811--2818},
  author={Ozden, Adnan and Li, Fengwang and Pelayo García de Arquer, Francisco and Rosas-Hernández, Alonso and Thevenon, Arnaud and Li, Jun and Agapie, Theodor and Peters, Jonas C. and Sargent, Edward H. and Sinton, David}
}
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