Screening of Carbon-Supported PdAg Nanoparticles in the Hydrogen Production from Formic Acid

Navlani‐García, Miriam; Mori, Kohsuke; Nozaki, Ai; Kuwahara, Yasutaka; Yamashita, Hiromi

doi:10.1021/acs.iecr.6b01635

Cited by 36 publications

(26 citation statements)

References 76 publications

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“…Our research group reported on the screening of carbonsupported PdAg catalysts prepared by loading pre-synthetized PVP-capped nanoparticles on activated carbon (Shirasagi M), in which the composition of the nanoparticles was optimized in terms of Pd/Ag and PVP/metal molar ratios (Navlani-García et al, 2016c).…”

Section: Effect Of the Nanoparticle Compositionmentioning

confidence: 99%

“…H 2 generated after 3 h of reaction over PdAg/C catalysts with a various composition of the nanoparticles. Adapted with permission fromNavlani-García et al (2016c). Copyright 2016 American Chemical Society.…”

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confidence: 99%

“…(A) Pd and (B) Ag FT-EXAFS spectra of Pd1Ag2/C catalysts prepared using colloids with different PVP/M ratios [Pd1Ag2/C(1), Pd1Ag2/C(5), and Pd1Ag2/C(10)] and reference samples (Pd and Ag foils). Adapted with permission from(Navlani-García et al, 2016c). Copyright 2016 American Chemical Society.…”

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confidence: 99%

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New Approaches Toward the Hydrogen Production From Formic Acid Dehydrogenation Over Pd-Based Heterogeneous Catalysts

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The urgency for finding clean energy sources is nowadays latent, and the role of hydrogen in the future of energy is well-recognized. However, there are still various barriers that limit the widespread utilization of hydrogen, which are mainly related to its storage and transportation. Chemical hydrogen storage stands out as a suitable alternative to traditional physical storage methods, and formic acid holds tremendous promise within the molecules studied so far. This review summarizes some of the recent approaches considered in our research group for the preparation of efficient catalysts for the production of hydrogen via dehydrogenation of formic acid by using Pd-based heterogeneous catalysts supported on carbon or carbon-containing materials. Several routes were considered to attain efficient catalysts, from the optimization of the size and composition of the nanoparticles to the modulation of important features of the support, such as the porous texture and nitrogen doping level.

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Section: Effect Of the Nanoparticle Compositionmentioning

confidence: 99%

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New Approaches Toward the Hydrogen Production From Formic Acid Dehydrogenation Over Pd-Based Heterogeneous Catalysts

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“…Among them, the catalyst synthesised by FA-reduction was the most active (initial TOF of 90 h −1 at 25 • C), what was claimed to be due to the presence of electron-rich abundant Pd atoms on the surface of the nanoparticles as well as to their alloyed state. Our group also reported on the impact Energies 2019, 12, 4027 6 of 27 of the surface Pd/Ag ratio in the final catalytic performance [43]. In that study, we used a promising synthetic strategy based on the preparation of colloidal PVP-capped PdAg nanoparticles through the reduction by solvent method.…”

Section: Carbon-supported Pdag Catalystsmentioning

confidence: 99%

Hydrogen Production from Formic Acid Attained by Bimetallic Heterogeneous PdAg Catalytic Systems

2019

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The production of H 2 from the so-called Liquid Organic Hydrogen Carriers (LOHC) has recently received great focus as an auspicious option to conventional hydrogen storage technologies. Among them, formic acid, the simplest carboxylic acid, has recently emerged as one of the most promising candidates. Catalysts based on Pd nanoparticles are the most fruitfully investigated, and, more specifically, excellent results have been achieved with bimetallic PdAg-based catalytic systems. The enhancement displayed by PdAg catalysts as compared to the monometallic counterpart is ascribed to several effects, such as the formation of electron-rich Pd species or the increased resistance against CO-poisoning. Aside from the features of the metal active phases, the properties of the selected support also play an important role in determining the final catalytic performance. Among them, the use of carbon materials has resulted in great interest by virtue of their outstanding properties and versatility. In the present review, some of the most representative investigations dealing with the design of high-performance PdAg bimetallic heterogeneous catalysts are summarised, paying attention to the impact of the features of the support in the final ability of the catalysts towards the production of H 2 from formic acid.Energies 2019, 12, 4027 2 of 27 fact, it is challenging not only for developed countries in which the living standard requires large energy supplies, but also for those developing countries that experience a high population growth.Among greenhouse gases, carbon dioxide (CO 2 ) is considered the most important because, even though its global warming potential (GWP) is much lower than that of other gases, the emissions of CO 2 are far more abundant. GWP parameter was developed to compare the global warming impacts of different gases and it is a measure of how much energy the emissions of 1 ton of a gas will absorb over a given period, relative to the emissions of 1 ton of CO 2 , which is used as the reference. Then, CO 2 has a GWP of 1 regardless of the time used, while GWP is 28-36 and 265-298 times that of CO 2 for methane (CH 4 ) and nitrous oxide (N 2 O), respectively [1]. Such considerations, that are nowadays central scientific and social concerns, have a long historical background within the research community. Arrhenius was among the first to hypothesise about the impact of CO 2 on the Earth's climate [2], but his hypothesis was overlooked until the 1950s [3]. Now, after more than half a century, there is not yet a chemical process able to efficiently clean the growing volumes of CO 2 in the atmosphere. Some interesting actions taken so far are related to the production of hydrocarbon fuels by recycling H 2 O and CO 2 with renewable energy sources or the CO 2 capture and sequestration (CCS) technology [4][5][6][7].In such energy and environmental context, the search for alternative carbon emission-free energy sources is required to avoid further disastrous consequences. Hydrogen (H 2 ), a carbon-free fuel, is consi...

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“…The more convenient use of heterogeneous catalysts has motivated the search for new alternatives to achieve competitive and selective heterogeneous systems able to catalyze the dehydrogenation of FA under mild or moderate conditions. Significant breakthroughs in the field have been achieved while exploring aspects such as the features of the metallic active phase [42][43][44][45][46] or the properties of the support [44,[47][48][49][50]. Most of the investigation reported so far use relatively high temperatures to achieve acceptable conversion of FA into H2.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Approaches for Hydrogen Production via Formic Acid Decomposition

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The photocatalytic dehydrogenation of formic acid has recently emerged as an outstanding alternative to the traditional thermal catalysts widely applied in this reaction.The utilization of photocatalytic processes for the production of hydrogen is an appealing strategy that perfectly matches with the idea of green and sustainable future energy scenario. However, it sounds easier than it is, and great efforts have been needed to design and develop highly efficient photocatalysts for the production of hydrogen from formic acid. In this work, some of the most representative strategies adopted for this application are reviewed, by paying particular attention to those systems based on TiO2, CdS and C3N4.

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Screening of Carbon-Supported PdAg Nanoparticles in the Hydrogen Production from Formic Acid

Cited by 36 publications

References 76 publications

New Approaches Toward the Hydrogen Production From Formic Acid Dehydrogenation Over Pd-Based Heterogeneous Catalysts

New Approaches Toward the Hydrogen Production From Formic Acid Dehydrogenation Over Pd-Based Heterogeneous Catalysts

Hydrogen Production from Formic Acid Attained by Bimetallic Heterogeneous PdAg Catalytic Systems

Photocatalytic Approaches for Hydrogen Production via Formic Acid Decomposition

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