In:
Advanced Materials, Wiley, Vol. 35, No. 14 ( 2023-04)
Kurzfassung:
Precisely tailoring the oxidation state of single‐atomic metal in heterogeneous catalysis is an efficient way to stabilize the single‐atomic site and promote their activity, but realizing this approach remains a grand challenge to date. Herein, a class of stable single‐atomic catalysts with well‐tuned oxidation state of Pt by forming PtFe atomic bonds is reported, which are supported by defective Fe 2 O 3 nanosheets on reduced graphene oxide (PFARFNs). These as‐synthesized materials can greatly enhance the catalytic activity, stability, and selectivity for the diboration of alkynes. The PFARFNs exhibit high conversion of 99% at 100 °C with an outstanding turnover frequency (TOF) of 545 h −1 , and a relatively high conversion of 58% at room temperature (25 °C) with a TOF of 310 h −1 , which has been hardly achieved previously. Through both experimental and theoretical investigation, it is demonstrated that the fast electron transfer from Fe to Pt in Fe–Pt–O atomic sites in PFARFNs can not only stabilize the single‐atomic Pt, but also significantly improve their catalytic activity.
Materialart:
Online-Ressource
ISSN:
0935-9648
,
1521-4095
DOI:
10.1002/adma.202211790
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
2023
ZDB Id:
1474949-X