Glycerol Hydrogenolysis to 1,3‐Propanediol on Tungstate/Zirconia‐Supported Platinum: Hydrogen Spillover Facilitated by Pt(1 1 1) Formation

Abstract

In glycerol hydrogenolysis, WOx and ReOx catalysts have been investigated widely because of their importance for the selectivity of 1,3‐propanediol, but few studies have focused on hydrogen spillover. In this work, the hydrogen spillover effect on the catalytic performance was investigated for a series of Pt/WO3/ZrO2 nanocatalysts. The spillover capacities were tuned by changing the tetragonal/monoclinic ZrO2 composition and thermal treatment conditions of the Pt precursor. H2/O2 titration and X‐ray photoelectron spectroscopy (XPS) confirm that all of the catalysts present a uniform Pt dispersion and a similar surface electron environment. Diffuse reflectance infrared Fourier transform spectra of adsorbed CO and H2 chemisorption reveal the strong correlation between the amount of Pt(1 1 1) terraces and the spillover capacities. We demonstrate that the reaction rate is influenced by hydrogen spillover, but not the acid amount or acid strength of the catalysts in this case. The important roles of Pt(1 1 1) and WO3 in the spillover process are discussed.

Effective Hydrogenolysis of Glycerol to 1,3‐Propanediol over Metal‐Acid Concerted Pt/WOx/Al2O3 Catalysts

“…Therefore, the selective hydrogenolysis of glycerol to 1,3‐PDO is highly desirable yet more challenging. Driven by the great potential for practical applications, this reaction has been intensively studied . So far, it has been established that a noble metal in combination with an oxophilic metal oxide, typically like Ir−ReO x, Rh−ReO x and Pt−WO x , is effective for the formation of 1,3‐PDO.…”

Glycerol Transformation to Value-Added 1,3-Propanediol Production: A Paradigm for a Sustainable Biorefinery Process

“…In comparison to a simple protic acid, the addition of H 2 WO 4 to the catalyst enhanced the catalytic performance to propanediols. Later extensive research work was carried out based on noble metaland tungsten-based catalysts (Pt-WOx) [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42]. While Pt/WOx catalysts stand out to be the most outstanding high-performance catalysts for selective hydrogenolysis of glycerol to 1,3-PDO compared to other noble metals, Cu-based WOx supported on titania catalyst has also been investigated and was found to efficient in the production of 1,3-PDO [42].…”

Influence of Boron, Tungsten and Molybdenum Modifiers on Zirconia Based Pt Catalyst for Glycerol Valorization

“…Most described metals in the literature for glycerol hydrogenolysis are transition metals such as Cu, Ni or Co [8,27], but also some noble metals such as Pd [28], Rh [18] or Pt [29,30,31,32,33] can be used. Among them, Pt is the preferred one since it is able to avoid C2 and C1 products, that is, to avoid C-C breakage [30].…”

“…Regarding the support, metals are supported on different solids such as metal oxides [18,25,33,34,35], zeolites [33], carbonates [36] or charcoal [37], just to cite some of them. Among metal oxides, ZrO 2 is an interesting support since its acid-base properties can be easily tuned up by employing different dopants or modifiers [38,39].…”