Silanol nest-driven redispersion of sintered PtSn clusters in zeolite for regenerable propane dehydrogenation - Details

author：

Chen, R. (Chen, R..) ^[1] | Wang, P. (Wang, P..) ^[2] | Wu, L. (Wu, L..) ^[3] | Tan, L. (Tan, L..) ^[4] | Tang, Y. (Tang, Y..) ^[5]

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Abstract：

PtSn　bimetallic　catalysts　applied　in　propane　dehydrogenation　(PDH)　reaction　suffer　from　deactivation　at　high　temperatures　(500–700　°C)　due　to　metal　segregation　and　Sn-rich　cluster　formation.　This　study　demonstrates　that　supporting　PtSn　catalysts　on　Silicalite-1　zeolite　(S-1)　enhances　Sn　dispersion　through　interactions　with　silanol　hydroxyl　groups,　enabling　effective　regeneration　of　Pt-rich　PtSn　clusters　even　after　15　reaction-regeneration　cycles.　Comprehensive　characterizations　reveal　that　silanol　nests　play　a　critical　role　in　redispersing　metal　species　during　regeneration,　minimizing　aggregation,　and　maintaining　catalytic　activity.　The　enhanced　metal-support　interactions　significantly　improve　catalyst　regenerability　and　stability,　addressing　key　challenges　in　industrial　PDH　processes.　This　work　highlights　the　importance　of　Sn　dispersion　and　metal-support　interactions　in　designing　durable　and　efficient　PtSn　catalysts,　offering　practical　insights　for　sustainable　propylene　production.　©　2025　Elsevier　B.V.

Keyword：

Catalyst regeneration Propane dehydrogenation Propylene PtSn catalyst Silanol

Community：

[ 1 ] [Chen R.]Institute of Molecular Catalysis and In-situ/operando Studies, Institute of Molecular Engineering Plus, College of Chemistry, Fuzhou University, Fuzhou, 350108, China
[ 2 ] [Wang P.]Institute of Molecular Catalysis and In-situ/operando Studies, Institute of Molecular Engineering Plus, College of Chemistry, Fuzhou University, Fuzhou, 350108, China
[ 3 ] [Wang P.]College of Environment & Safety Engineering, Fuzhou, 350108, China
[ 4 ] [Wu L.]Institute of Molecular Catalysis and In-situ/operando Studies, Institute of Molecular Engineering Plus, College of Chemistry, Fuzhou University, Fuzhou, 350108, China
[ 5 ] [Tan L.]Institute of Molecular Catalysis and In-situ/operando Studies, Institute of Molecular Engineering Plus, College of Chemistry, Fuzhou University, Fuzhou, 350108, China
[ 6 ] [Tang Y.]Institute of Molecular Catalysis and In-situ/operando Studies, Institute of Molecular Engineering Plus, College of Chemistry, Fuzhou University, Fuzhou, 350108, China

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Source ：

Molecular Catalysis

ISSN： 2468-8231

Year： 2025

Volume： 583

3 . 9 0 0

JCR@2023

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ESI Highly Cited Papers on the List： 0 Unfold All

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30 Days PV： 2

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