Hydrogen from formic acid decomposition over Pd and Au catalysts

Bulushev, Dmitri A.; Beloshapkin, Sergey; Ross, J.R.H.

doi:10.1016/j.cattod.2010.03.050

Cited by 216 publications

(183 citation statements)

References 22 publications

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“…We have previously shown that a 1 wt.% Pd/C catalyst gave a TOF value of about 0.07 s -1 for the decomposition of formic acid at 373 K [15], this value being only slightly lower than that reported by Solymosi et al [21] for an Ir/C catalyst (0.096 s -1 ) under similar conditions.…”

Section: Introductionmentioning

confidence: 56%

“…This demand can be achieved by careful choice of a catalyst and reaction conditions and a significant amount of work on the decomposition of formic acid is currently in progress aimed at finding suitable combinations. Hydrogen production from formic acid using heterogeneous catalysts has therefore been studied widely in both the liquid [10][11][12][13][14] and vapour [15][16][17][18][19][20][21][22] phases.…”

Section: Introductionmentioning

confidence: 99%

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Hydrogen production from formic acid vapour over a Pd/C catalyst promoted by potassium salts: Evidence for participation of buffer-like solution in the pores of the catalyst

Liu

Bulushev

Beloshapkin

et al. 2014

Applied Catalysis B: Environmental

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(D.A. Bulushev) 2 A B S T R A C T Doping a 1 wt.% Pd/C catalyst with alkali metal carbonates has a very significant promotional effect on its activity in hydrogen production from the decomposition of formic acid vapour (2 vol.%, 1 bar), potassium and caesium carbonates giving the largest effects. The K carbonate species present on the fresh catalysts react with formic acid to form formate ions, these being dissolved in a formic acid/water solution condensed in the pores of the support. The steadystate activities of the samples containing formate ions were 1-2 orders of magnitude greater than those of the unpromoted Pd/C and CO content was lower than 30 ppm. The activation energies for the reaction increased with doping from 66 to 88-99 kJ mol -1 , relatively independent of the cation of the dopant. Similar but lesser effects were found with unsupported Pd nanocrystals doped with K carbonate. The rate-determining step for the promoted samples appears to be the decomposition of formate ions on the Pd surface.

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Section: Introductionmentioning

confidence: 56%

Section: Introductionmentioning

confidence: 99%

Hydrogen production from formic acid vapour over a Pd/C catalyst promoted by potassium salts: Evidence for participation of buffer-like solution in the pores of the catalyst

Liu

Bulushev

Beloshapkin

et al. 2014

Applied Catalysis B: Environmental

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“…17,25 Activity tests were performed at atmospheric pressure with 7 mg of catalyst placed between two layers of quartz wool. The catalysts were reduced in an 1 vol.% H 2 /Ar mixture at 573 K for 1 h and cooled in He to the reaction temperature (333 K).…”

Section: Catalytic Experimentsmentioning

confidence: 99%

“…20,21 The major problem of these catalysts is inhibition of the reaction by CO formed as a by-product in very small concentrations. 17,22 Carbon materials are widely used as supports for catalysts for different reactions and especially for those related to biomass conversion as these supports are very inert in different media. The chemical composition of the carbon support surface may affect the catalytic properties of supported metals.…”

Section: Introductionmentioning

confidence: 99%

Single Isolated Pd²⁺ Cations Supported on N-Doped Carbon as Active Sites for Hydrogen Production from Formic Acid Decomposition

et al. 2015

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Single-site heterogeneous catalysis with isolated Pd atoms was reported earlier mainly for oxidation reactions and for Pd catalysts supported on oxide surfaces. In the present work, we show that single Pd atoms on nitrogen-functionalized mesoporous carbon, observed by aberration-corrected scanning transmission electron microscopy (ac STEM), contribute significantly to the catalytic activity for hydrogen production from vapor-phase formic acid decomposition providing an increase by 2-3 times as compared to Pd catalysts supported on nitrogen-free carbon or unsupported Pd powder. Some gain in selectivity was also achieved.According to X-ray photoelectron spectroscopy (XPS) and near-edge X-ray absorption fine structure (NEXAFS) studies after ex situ reduction in hydrogen at 573 K, these species exist in a

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“…[31][32][33] Among them, Pd is one of the metals with the lowest activation energy and most promising TOF values. 34,35 The incorporation of Pd NPs on different supports (carbon, zeolites, MOFs or silica) has also been studied in the literature with different results depending on the nature of the support and the active phases features. [36][37][38][39][40][41] Herein the evolution of the PVP-Pd interaction over time as well as its repercussion on the final catalytic performance in the H 2 production from the dehydrogenation of FA was assessed by synthesising a series of catalysts based on PVP-capped Pd NPs supported on a meso-and macroporous SiO 2 .…”

Section: Introductionmentioning

confidence: 99%

Evolution of the PVP–Pd Surface Interaction in Nanoparticles through the Case Study of Formic Acid Decomposition

et al. 2016

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Palladium nanoparticles (Pd NPs) were synthesised by the reduction-by-solvent method using polyvinylpirrolidone (PVP) as capping agent. The non-static interaction between PVP and the metallic surface may change the properties of the NPs due to the different possible interactions, either through the O or N atoms of the PVP. In order to analyse these effects and their repercussion in their catalytic performance, Pd NPs with various PVP/Pd molar ratios (1, 10 and 20) were prepared, deposited on silica and tested in the formic acid decomposition reaction. The catalytic tests were conducted using catalysts prepared by loading NPs with three different time lapses between their purification and their deposition on the silica support (1 day, 1 month, and 6 months). CO adsorption, FTIR spectroscopy, XPS and TEM characterisation were used to determine the accessibility of the Pd NPs surface sites, electronic state of Pd and the average NPs size, respectively. The H 2 production from the formic acid decomposition reaction has a strong dependence with the Pd surface features, which in turn are related to the NPs aging time due to the progressive removal of the PVP.

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Hydrogen from formic acid decomposition over Pd and Au catalysts

Cited by 216 publications

References 22 publications

Hydrogen production from formic acid vapour over a Pd/C catalyst promoted by potassium salts: Evidence for participation of buffer-like solution in the pores of the catalyst

Hydrogen production from formic acid vapour over a Pd/C catalyst promoted by potassium salts: Evidence for participation of buffer-like solution in the pores of the catalyst

Single Isolated Pd²⁺ Cations Supported on N-Doped Carbon as Active Sites for Hydrogen Production from Formic Acid Decomposition

Evolution of the PVP–Pd Surface Interaction in Nanoparticles through the Case Study of Formic Acid Decomposition

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Hydrogen from formic acid decomposition over Pd and Au catalysts

Cited by 216 publications

References 22 publications

Hydrogen production from formic acid vapour over a Pd/C catalyst promoted by potassium salts: Evidence for participation of buffer-like solution in the pores of the catalyst

Hydrogen production from formic acid vapour over a Pd/C catalyst promoted by potassium salts: Evidence for participation of buffer-like solution in the pores of the catalyst

Single Isolated Pd2+ Cations Supported on N-Doped Carbon as Active Sites for Hydrogen Production from Formic Acid Decomposition

Evolution of the PVP–Pd Surface Interaction in Nanoparticles through the Case Study of Formic Acid Decomposition

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Single Isolated Pd²⁺ Cations Supported on N-Doped Carbon as Active Sites for Hydrogen Production from Formic Acid Decomposition