Atomic Insights into Synergistic Nitroarene Hydrogenation over Nanodiamond-Supported Pt₁ -Fe₁ Dual-Single-Atom Catalyst

Fundamental understanding of the synergistic effect of bimetallic catalysts is of extreme significance in heterogeneous catalysis, but a great challenge lies in the precise construction of uniform dual-metal sites. Here, we develop a novel method for constructing Pt₁ -Fe₁ /ND dual-single-atom catalyst, by anchoring Pt single atoms on Fe₁ -N₄ sites decorating a nanodiamond (ND) surface. Using this catalyst, the synergy of nitroarenes selective hydrogenation is revealed. In detail, hydrogen is activated on the Pt₁ -Fe₁ dual site and the nitro group is strongly adsorbed on the Fe₁ site via a vertical configuration for subsequent hydrogenation. Such synergistic effect decreases the activation energy and results in an unprecedented catalytic performance (3.1 s^-1 turnover frequency, ca. 100 % selectivity, 24 types of substrates). Our findings advance the applications of dual-single-atom catalysts in selective hydrogenations and open up a new way to explore the nature of synergistic catalysis at the atomic level.