In:
New Journal of Chemistry, Royal Society of Chemistry (RSC), Vol. 46, No. 18 ( 2022), p. 8575-8582
Abstract:
High-efficiency and durable palladium (Pd)-based catalysts are desirable for the Suzuki–Miyaura coupling reaction, which is an efficient strategy for the construction of value-added carbon–carbon bonds in synthetic organic chemistry. Herein, we report the fabrication of highly dispersed Pd nanoclusters anchored on nanostructured hafnium( iv ) oxide (HfO 2 ; Pd@HfO 2 ) catalysts via the two-step pyrolysis of a Hf-based metal–organic framework precursor in the presence of nitrogen and air, respectively. The resulting Pd@HfO 2 catalyst presents excellent catalytic activity ( 〉 99%) for the cross-coupling of bromobenzene and phenylboronic acid, outperforming the analog Pd@ZrO 2 (72%), as well as Pd/HfO 2 (Im) (90%) prepared via an impregnation method. This outcome was likely related to the highly dispersed ultra-small Pd nanoclusters and an appropriate number of acidic sites available within the HfO 2 support. The Pd@HfO 2 can be reused for at least 10 cycles without any decay in its catalytic reactivity. Moreover, the catalyst is also highly efficient for catalyzing the cross-coupling of phenylboronic acid and aryl halide with various functional groups, indicating its significant potential for industrial application.
Type of Medium:
Online Resource
ISSN:
1144-0546
,
1369-9261
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
1472933-7
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