Affiliation:
1. Department of Chemistry City University of Hong Kong Hong Kong SAR 999077 P. R. China
2. Cambridge CARES CREATE Tower Singapore 138602 Singapore
3. Laboratory of Theoretical and Computational Chemistry Institute of Theoretical Chemistry Jilin University Changchun 130012 P. R. China
4. Department of Chemical Engineering and Biotechnology University of Cambridge Cambridge CB2 3RA UK
5. Hong Kong Branch of National Precious Metals Material Engineering Research Center City University of Hong Kong Hong Kong SAR 999077 P. R. China
Abstract
AbstractElectrocatalytic hydrogen peroxide (H2O2) production has emerged as a promising alternative to the chemical method currently used in industry, due to its environmentally friendly conditions and potential for higher activity and selectivity. Heterogeneous molecular catalysts are promising in this regard, as their active site configurations can be judiciously designed, modified, and tailored with diverse functional groups, thereby tuning the activity and selectivity of the active sites. In this work, nickel phthalocyanine derivatives with various conjugation degrees are synthesized and identified as effective pH‐universal electrocatalysts for H2O2 production after heterogenized on nitrogen‐decorated carbon, with increased conjugation degrees leading to boosted selectivity. This is explained by the regulated d‐band center, which optimized the binding energy of the reaction intermediate, reducing the energy barrier for oxygen reduction and leading to optimized H2O2 selectivity. The best catalyst, NiPyCN/CN, exhibits a high H2O2 electrosynthesis activity with ≈95% of H2O2 faradic efficiency in an alkaline medium, demonstrating its potential for H2O2 production.
Funder
City University of Hong Kong
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Cited by
3 articles.
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