Hydrogen production through NaBH4 hydrolysis over supported Ru catalysts: An insight on the effect of the support and the ruthenium precursor

Crisafulli, C.; Scirè, Salvatore; Salanitri, Marco; Zito, Roberta; Calamia, Stefania

doi:10.1016/j.ijhydene.2010.12.089

Cited by 67 publications

(34 citation statements)

References 54 publications

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“…Recently we found that Ru supported on an activated carbon of mineral origin is more active with respect to Ru on other supports, such as ceria, titania and alumina [24]. This behaviour was accounted for by the high surface area of the activated carbon and its high chemical inertness at high pH values.…”

Section: Introductionmentioning

confidence: 94%

“…This behaviour was accounted for by the high surface area of the activated carbon and its high chemical inertness at high pH values. Moreover, results showed that on the investigated carbon the Ru precursor also affected the catalytic activity, with RuCl 3 resulting in better performance in terms of H 2 production rates with respect to Ru(NO)(NO 3 ) 3 [24]. Characterization data showed that the Ru particle size depended on the precursor used, with Ru(NO)(NO 3 ) 3 leading to much smaller Ru nanoparticles (average diameter \1 nm) compared to RuCl 3 (average diameter of 2.4 nm).…”

Section: Introductionmentioning

confidence: 97%

“…The self-hydrolysis reaction is inhibited by keeping NaBH 4 solutions at pH [13. At this pH, hydrogen release occurs only in the presence of specific catalysts, allowing the development of ''hydrogen on demand'' systems (HOD) [13,16,17]. Numerous catalysts have been investigated for NaBH 4 hydrolysis, with special attention devoted to heterogeneous catalysts based on Ru [6,7,16,[18][19][20][21][22][23][24], Co [25][26][27][28][29][30], Pt [9-11, 31, 32], Ni [33][34][35] and Pd [16,36,37]. Ni and Co catalysts have attracted considerable interest due to their lower cost compared to noble metals, whereas Ru is preferred for HOD applications despite its high price due to its elevated activity.…”

Section: Introductionmentioning

confidence: 99%

“…The support can directly take part in the reaction mechanism favoring the adsorption/desorption of the reactants/products on/by the catalytic system, or it can influence the dispersion of the catalytically active species, stabilizing them against sintering [38]. The precursor used for catalyst preparation can also affect the dispersion and the metal size of the active species over the support [24,39,40].…”

Section: Introductionmentioning

confidence: 99%

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Role of the Support and the Ru Precursor on the Performance of Ru/Carbon Catalysts Towards H2 Production Through NaBH4 Hydrolysis

et al. 2012

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This paper details NaBH 4 hydrolysis over Ru catalysts supported on activated carbons of different origin and morphology. The influence of two Ru precursors [RuCl 3 or Ru(NO)(NO 3 ) 3 ] was also investigated. It was found that the H 2 production rate strongly depends both on the support characteristics and the Ru precursor, the best performance being obtained using an activated carbon of vegetable origin as the support and Ru(NO)(NO 3 ) 3 as the precursor. It was concluded that the carbon type and the Ru precursor mutually affect the size of the supported Ru nanoparticles with the best combination being the one leading to Ru particles with diameters around 2.5 nm, which is regarded as optimal for NaBH 4 hydrolysis.

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Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Role of the Support and the Ru Precursor on the Performance of Ru/Carbon Catalysts Towards H2 Production Through NaBH4 Hydrolysis

et al. 2012

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“…Ru NPs supported on active carbon showed high catalytic activity in hydrogenation of lactic acid, arene and ketone, and hydrolysis of NaBH 4 . [56][57][58] Ru NPs embedded in ordered mesoporous carbon material also demonstrated a higher activity in FischerTropsch synthesis, 59 hydrogenation of glucose, 60 and partial hydrogenation of dinitrobenzene into nitroanilines, 58 Finely dispersed Ru NPs on rGO also show superior catalytic performance in hydrogenation of arenes and ketone as compared with those deposed on mesoporous carbon. [61][62] To address the superior catalytic performance of these finely dispersed Ru NPs and especially the Ru NPs deposited on rGO.…”

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confidence: 99%

Understanding the Enhanced Catalytic Performance of Ultrafine Transition Metal Nanoparticles–Graphene Composites

Liu

Meng

Han

2015

J. Mol. Eng. Mater.

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Catalysis, as the key to minimize the energy requirement and environmental impact of today's chemical industry, plays a vital role in many fields directly related to our daily life and economy, including energy generation, environment control, manufacture of chemicals, medicine synthesis and etc. Rational design and fabrication of highly efficient catalysts have become the ultimate goal of today's catalysis research. For the purpose of handling and product separation, heterogeneous catalysts are highly preferred for industrial applications and a large part of which are the composites of transition metal nanoparticles (TM NPs). With the fast development of nano-science and nano-technology and assisted with theoretical investigations, basic understanding on tailoring the electronic structure of these nano-composites has been gained, mainly by precise control of the composition, morphology, interfacial structure and electronic states. With the rise of graphene, chemical routes to prepare graphene were developed and various graphene based composites were fabricated. Transition metal nanoparticle-reduced graphene oxide (TM-rGO) composites have attracted considerable attention, because of their intriguing catalytic performance which have been extensively explored for energy-and environment-related applications to date. This review summarizes our recent experimental and theoretical efforts on understanding the superior catalytic performance of subnanosized TM NPs -rGO composites. 3Tailoring catalysts and catalytic processes have long been the 'Holy Grail' of catalytic chemistry. The key elementary steps of catalytic reactions, such as the adsorption of reactants, the diffusion of intermediates and the desorption of products, all involve bond formation and dissociation and are associated with electron transfer among the catalyst and the adsorbed reaction species. According to the frontier molecular orbital theory, the strength of the bonding of reactants onto catalyst surfaces is closely related to the symmetry and occupation of the orbitals of reactants, and is strongly correlated with the difference in the energy levels of the reactants and those of the catalyst. Norskov and coworkers extended this idea to periodic transition metal systems and introduced the d-band center theory based on a large body of experimental and theoretical results, which emphasizes that the density of TM-d states around the Fermi level is an important factor affecting catalytic reactions.1 To this end, controlled modulation of the spatial and energy distribution of the catalyst states would be a feasible way to lower the energy barriers and facilitate the adsorption and subsequent bonding evolution between reactants over the catalyst on the specific reaction paths to achieve high reactivity and so as the product selectivity.The conventional methods to influence and adjust the electronic structure of a catalyst are to develop interactions and charge transfer among the primary catalytic composition with various additives. Alloying and d...

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Hydrogen Generation from Chemical Hydrides

Sankır

Semiz

Serin

et al. 2015

Advanced Catalytic Materials

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Hydrogen production through NaBH4 hydrolysis over supported Ru catalysts: An insight on the effect of the support and the ruthenium precursor

Cited by 67 publications

References 54 publications

Role of the Support and the Ru Precursor on the Performance of Ru/Carbon Catalysts Towards H2 Production Through NaBH4 Hydrolysis

Role of the Support and the Ru Precursor on the Performance of Ru/Carbon Catalysts Towards H2 Production Through NaBH4 Hydrolysis

Understanding the Enhanced Catalytic Performance of Ultrafine Transition Metal Nanoparticles–Graphene Composites

Hydrogen Generation from Chemical Hydrides

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