posted on 2024-01-30, 23:04authored byChengling Yang, Jinmeng Tong, Hailong Li, Huiying Gao, Guodong Wen, Jinsong Zhang, Yukun Yan
A heterogeneous N-coordinated Pt single-atom
catalyst
with low valence was synthesized via an “interfacial spontaneous
reduction (ISR)” strategy under mild conditions, using cheap
and widely available industrial raw materials. The reducing groups
were modified onto commercial carbon black XC-72R, which was able
to reduce the Pt species at the solid–liquid interface without
the need of an extra reducing agent, followed by in situ coordination
of the reduced Pt atoms, preventing their aggregation. The prepared
Pt single-atom catalyst (Pt1–N–C) acted as
an actual reactive center for hydrosilylation and catalyzed the reaction
directly, resulting in the absence of an induction period and an ultrahigh
turnover frequency of 9.3 × 106 h–1. Moreover, the catalysts can be used on a wide range of olefin and
silane substrates, achieving a turnover number of over 4.5 ×
106 in the subkilogram-scale reaction. The ISR strategy
provides a low-cost method to prepare noble metal single atoms on
industrial-grade materials with the potential for large-scale preparation
and application.