Activity of Pd/C for hydrogen generation in aqueous formic acid solution

Hu, Chaoquan; Pulleri, Jayasree K.; Ting, Siu-Wa; Chan, Kwong‐Yu

doi:10.1016/j.ijhydene.2013.10.067

Cited by 142 publications

(89 citation statements)

References 52 publications

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“…The H 2 /CO 2 ratios were evolved from 1.06 to 1.13 for the catalytic decomposition of formic acid. This slight deviation could be due to a difference in solubility of CO 2 and H 2 or a consumption and adsorption of H 2 by PdO as previously reported [50].…”

Section: Gas Analysissupporting

confidence: 62%

Hydrogen Generation from Additive-Free Formic Acid Decomposition Under Mild Conditions by Pd/C: Experimental and DFT Studies

et al. 2018

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Safe and efficient hydrogen generation and storage has received much attention in recent years. Herein, a commercial 5 wt% Pd/C catalyst has been investigated for the catalytic, additive-free decomposition of formic acid at mild conditions, and the experimental parameters affecting the process systematically have been investigated and optimised. The 5 wt% Pd/C catalyst exhibited a remarkable 99.9% H 2 selectivity and a high catalytic activity (TOF = 1136 h −1 ) at 30 °C toward the selective dehydrogenation of formic acid to H 2 and CO 2 . The present commercial catalyst demonstrates to be a promising candidate for the efficient in-situ hydrogen generation at mild conditions possibiliting practical applications of formic acid systems on fuel cells. Finally DFT studies have been carried out to provide insights into the reactivity and decomposition of formic acid along with the two-reaction pathways on the Pd (111) surface.

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Section: Gas Analysissupporting

confidence: 62%

Hydrogen Generation from Additive-Free Formic Acid Decomposition Under Mild Conditions by Pd/C: Experimental and DFT Studies

et al. 2018

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“…Figure S13 (Supporting Information) shows that the CO signal is negligible. As suggested by other researchers, there is an optimum distribution of palladium particle size towards this reaction, and single atoms may result in CO formation through linear (monodentate) absorption of formate and account for the rapid poisoning. The dominant nanoclusters of palladium with appropriate size range in our case, in parallel with the above results, excludes CO poisoning on the active palladium sites.…”

Section: Hydrogenation Of Bicarbonate By Palladium‐based Catalysts[a]mentioning

confidence: 77%

Palladium on Nitrogen‐Doped Mesoporous Carbon: A Bifunctional Catalyst for Formate‐Based, Carbon‐Neutral Hydrogen Storage

et al. 2016

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The lack of safe, efficient, and economical hydrogen storage technologies is a hindrance to the realization of the hydrogen economy. Reported herein is a reversible formate-based carbon-neutral hydrogen storage system that is established over a novel catalyst comprising palladium nanoparticles supported on nitrogen-doped mesoporous carbon. The support was fabricated by a hard template method and nitridated under a flow of ammonia. Detailed analyses demonstrate that this bicarbonate/formate redox equilibrium is promoted by the cooperative role of the doped nitrogen functionalities and the well-dispersed, electron-enriched palladium nanoparticles.

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“…The Pd surface deactivation due to the occupation of active sites by reaction intermediates compounds (such as H + , CO 2 , H 2 O and/or HCOO -) has been also studied by Hu et al. 52 In this sense, the increase in Pd accessibility due to PVP dissolution might favor the adsorption of intermediates on the Pd surface, leading to space exclusion and repulsive adsorbate-adsorbate interaction that would finally decline the catalytic ability in the H 2 production.…”

Section: Resultsmentioning

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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Activity of Pd/C for hydrogen generation in aqueous formic acid solution

Cited by 142 publications

References 52 publications

Hydrogen Generation from Additive-Free Formic Acid Decomposition Under Mild Conditions by Pd/C: Experimental and DFT Studies

Hydrogen Generation from Additive-Free Formic Acid Decomposition Under Mild Conditions by Pd/C: Experimental and DFT Studies

Palladium on Nitrogen‐Doped Mesoporous Carbon: A Bifunctional Catalyst for Formate‐Based, Carbon‐Neutral Hydrogen Storage

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

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