Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 144, Issue 34, Pages 15431-15436Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.2c04828
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Funding
- Cardiff University
- Max Planck Centre for Fundamental Heterogeneous Catalysis (FUNCAT)
- University of Munster
- Deutsche Forschungsgemeinschaft (Leibniz Award) [SFB 858]
- MAXNET Energy consortium
- Fonds der Chemischen Industrie
- University of Bath
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Heterogeneous palladium catalysts modified by N-heterocyclic carbenes (NHCs) have shown high effectiveness in the direct synthesis of hydrogen peroxide (H2O2) without the need for promoters. By carefully selecting the N-substituent of the NHC, catalytic performance can be greatly improved, reaching concentrations of H2O2 rivaling that obtained by state-of-the-art catalysts.
Heterogeneous palladium catalysts modified by N-heterocyclic carbenes (NHCs) are shown to be highly effective toward the direct synthesis of hydrogen peroxide (H2O2), in the absence of the promoters which are typically required to enhance both activity and selectivity. Catalytic evaluation in a batch regime demonstrated that through careful selection of the N-substituent of the NHC it is possible to greatly enhance catalytic performance when compared to the unmodified analogue and reach concentrations of H2O2 rivaling that obtained by state-of-the-art catalysts. The enhanced performance of the modified catalyst, which is retained upon reuse, is attributed to the ability of the NHC to electronically modify Pd speciation.
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