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Chelating N‐Heterocyclic Carbene Ligands Enable Tuning of Electrocatalytic CO 2 Reduction to Formate and Carbon Monoxide: Surface Organometallic Chemistry

Journal Article · · Angewandte Chemie
 [1];  [2];  [3];  [4];  [2];  [2];  [2];  [4];  [4];  [3];  [5]
  1. Department of Chemistry University of California Berkeley CA 94720 USA
  2. Department of Chemistry University of California Berkeley CA 94720 USA, Chemical Sciences Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
  3. Department of Chemistry and Applied Biosciences ETH Zürich Vladimir Prelog Weg 1–5 8093 Zürich Switzerland
  4. Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan Shanxi 030001 China, Synfuels China Beijing 100195 China
  5. Department of Chemistry University of California Berkeley CA 94720 USA, Department of Molecular and Cell Biology Howard Hughes Medical Institute University of California Berkeley CA 94720 USA, Chemical Sciences Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
Abstract

Reported here is the chelate effect as a design principle for tuning heterogeneous catalysts for electrochemical CO 2 reduction. Palladium functionalized with a chelating tris‐N‐heterocyclic carbene (NHC) ligand (Pd‐timtmb Me ) exhibits a 32‐fold increase in activity for electrochemical reduction of CO 2 to C1 products with high Faradaic efficiency (FE C1 =86 %) compared to the parent unfunctionalized Pd foil (FE=23 %), and with sustained activity relative to a monodentate NHC‐ligated Pd electrode (Pd‐mimtmb Me ). The results highlight the contributions of the chelate effect for tailoring and maintaining reactivity at molecular‐materials interfaces enabled by surface organometallic chemistry.

Sponsoring Organization:
USDOE
OSTI ID:
1429155
Journal Information:
Angewandte Chemie, Journal Name: Angewandte Chemie Journal Issue: 18 Vol. 130; ISSN 0044-8249
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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Chelating N-Heterocyclic Carbene Ligands Enable Tuning of Electrocatalytic CO2 Reduction to Formate and Carbon Monoxide: Surface Organometallic Chemistry
Journal Article · Wed Feb 28 19:00:00 EST 2018 · Angewandte Chemie (International Edition) · OSTI ID:1480786

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