Boosted ammonium production by single cobalt atom catalysts with high Faradic efficiencies
Proceedings of the National Academy of Sciences of the United States of America(2022)
Abstract
Efficient n = O bond activation is crucial for the catalytic reduction of nitrogen compounds, which is highly affected by the construction of active centers. In this study, n = O bond activation was achieved by a single-atom catalyst (SAC) with phosphorus anchored on a Co active center to form intermediate N-species for further hydrogenation and reduction. Unique phosphorus-doped discontinuous active sites exhibit better n = O activation performance than conventional N-cooperated single-atom sites, with a high Faradic efficiency of 92.0% and a maximum ammonia yield rate of 433.3 mu g NH4.h(-1).cm(-2). This approach of constructing environmental sites through hetero-atom modification significantly improves atom efficiency and will guide the design of future functional SACs with wide-ranging applications.
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Key words
nitrate,single-atom catalyst,cobalt,charge transfer,electrochemistry
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