Ag@Pd nanoparticles immobilized on a nitrogen-doped graphene carbon nanotube aerogel as a superb catalyst for the dehydrogenation of formic acid

Nabid, Mohammad Reza; Bide, Yasamin; Etemadi, Bahare

doi:10.1039/c7nj01108c

Cited by 33 publications

(14 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Etemadi el at. reported on the utilisation of Ag-core Pd-shell nanoparticles supported on nitrogen-doped graphene carbon nanotube aerogel (Ag@Pd/N-GCNT) [69]. In that study graphene and CNTs were integrated into a hybrid aerogel, which was subsequently loaded with Ag and Pd in consecutive steps, to obtain controlled composition core-shell nanoparticles (i.e.…”

Section: N-doped Carbon-based Pdag Catalystsmentioning

confidence: 99%

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

2019

View full text Add to dashboard Cite

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...

show abstract

Section: N-doped Carbon-based Pdag Catalystsmentioning

confidence: 99%

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

2019

View full text Add to dashboard Cite

show abstract

“…Furthermore, for monometallic Pd systems, N-doped carbon materials have also been utilized as supports for bimetallic NPs. This was the approach of Etemadi et al in which a N-doped graphene carbon nanotube aerogel was used as a support for Ag@Pd NPs (Ag@Pd/N-GCNT) 28 . In that case, the Ag/Pd ratio was found to be optimum for sample Ag 1 @Pd 1 /N-GCNT.…”

Section: Pdagmentioning

confidence: 99%

Recent strategies targeting efficient hydrogen production from chemical hydrogen storage materials over carbon-supported catalysts

et al. 2018

View full text Add to dashboard Cite

There is an evident urgent need to find a renewable and clean energy vector to ensure the worldwide energy supply while minimizing environmental impacts, and hydrogen stands out as a promising alternative energy carrier. The social concern around its safe storage is constantly fostering the search for alternative options to conventional storage methods and, in this context, chemical hydrogen storage materials have produced abundant investigations with particular attention to the design of heterogeneous catalysts that can boost the generation of molecular hydrogen. Among the chemical hydrogen storage materials, formic acid and ammonia-borane hold tremendous promise, and some of the recent strategies considered for the preparation of high-performance carbon-supported catalysts are summarized in this review. The outstanding features of carbon materials and their versatility combined with the tunability of the metal active phase properties (e.g., morphology, composition, and electronic features) provide numerous options for the design of promising catalysts.

show abstract

“…The deposition of nano-sized noble metals into the hierarchical structure of transition metals or even conductive scaffolds could successfully bring significant effects in their electrical conductivity and electrochemical activity. [22,23] Within this context, 3D NiCoÀ LDH NSAs with Ag 0 or Au 0 and Pd 0 intercalations were constructed as efficient electrocatalysts for electrocatalysis of urea with the intention to improve the oxidation current and reduce the onset potential of reaction. The materials were synthesized by a hydrothermal treatment and a liquid phase reduction method in the presence of sodium borohydride (NaBH 4 ) as a reducing agent.…”

Section: Introductionmentioning

confidence: 99%

3D Hierarchical NiCo Layered Double Hydroxide Nanosheet Arrays Decorated with Noble Metal Nanoparticles for Enhanced Urea Electrocatalysis

Khalafallah

Zhi

et al. 2019

ChemElectroChem

View full text Add to dashboard Cite

The electrocatalysis of urea represents an important potential as an efficient technology for sustainable energy development. This anodic reaction generates hydrogen or electrical power through direct electrooxidation of urea molecules, but is greatly inhibited by its slow kinetics. Therefore, tailoring highly efficient, earth‐abundant, and durable electrocatalysts for urea oxidation reaction (UOR) is a fundamental for the enhancement of green energy conversion technologies. Herein, we report a scalable synthetic strategy to construct three‐dimensional (3D) nickel‐cobalt layered double hydroxide nanosheet arrays (NiCo−LDH NSAs) with silver (Ag0) or gold (Au0) and palladium (Pd0) intercalants as high performance catalysts for UOR. Experimental results suggest that the interlayer spacing of multi‐anions LDH NSAs can effectively afford synergetic effects of increased electrochemical surface area, better exposure of catalytically active sites, and favorable adsorption energy of urea molecules. As expected, the deposition of noble metal nanoparticles (NPs) could successfully modulate the electronic structure, delivering a rise to significantly improved UOR activity. Specifically, the Au/NiCo−LDH hybrid exhibits a superior electro‐catalytic performance toward urea electrooxidation with a highest current. These findings offer an effective pathway to prepare potential earth‐abundant electrocatalysts for direct urea fuel cells (DUFCs).

show abstract

Ag@Pd nanoparticles immobilized on a nitrogen-doped graphene carbon nanotube aerogel as a superb catalyst for the dehydrogenation of formic acid

Abstract: Catalytic dehydrogenation of formic acid by silver palladium supported on a nitrogen-doped graphene carbon nanotube aerogel.

Cited by 33 publications

References 50 publications

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

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

Recent strategies targeting efficient hydrogen production from chemical hydrogen storage materials over carbon-supported catalysts

3D Hierarchical NiCo Layered Double Hydroxide Nanosheet Arrays Decorated with Noble Metal Nanoparticles for Enhanced Urea Electrocatalysis

Contact Info

Product

Resources

About