Carbon dispersed copper-cobalt alloy nanoparticles: A cost-effective heterogeneous catalyst with exceptional performance in the hydrolytic dehydrogenation of ammonia-borane

Bulut, Ahmet; Ertaş, İlknur Efecan; Çelebı, Metın; Kaya, Murat; Zahmakıran, Mehmet

doi:10.1016/j.apcatb.2015.06.021

Cited by 132 publications

(68 citation statements)

References 60 publications

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“…Although the hydrolytic reaction is thermodynamically feasible in this technology, a proper catalyst is indispensable because hydrolytic dehydrogenation of AB cannot take place kinetically at room temperature. Noble‐metal‐based catalysts and Co‐based metal/alloy catalysts are two types of heterogeneous catalysts that have been extensively investigated in previous studies . Unfortunately, although their catalytic performance is high, noble‐metal‐based catalysts are too expensive, which is a big obstacle for their large‐scale applications.…”

Section: Comparison Of Tof Values For Some Non‐precious Metal Catalystsmentioning

confidence: 99%

A Simple and Scalable Route to Synthesize Co_xCu₁₋_xCo₂O₄@Co_yCu₁₋_yCo₂O₄ Yolk–Shell Microspheres, A High‐Performance Catalyst to Hydrolyze Ammonia Borane for Hydrogen Production

Lin

et al. 2019

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Yolk–shell structured micro/nano‐sized materials have broad and important applications in different areas due to their unique spatial configurations. In this study, yolk–shell structured Co3O4@Co3O4 is prepared using a simple and scalable hydrothermal reaction, followed by a calcination process. Then, CoxCu1−xCo2O4@CoyCu1−yCo2O4 microspheres are synthesized via adsorption and calcination processes using the as‐prepared Co3O4@Co3O4 as the precursor. A possible formation mechanism of the yolk–shell structures is proposed based on the characterization results, which is different from those of yolk–shell structures in previous study. For the first time, the catalytic activity of yolk–shell structured catalysts in ammonia borane (AB) hydrolysis is studied. It is discovered that the yolk–shell structured CoxCu1−xCo2O4@CoyCu1−yCo2O4 microspheres exhibit high performance with a turnover frequency (TOF) of 81.8 molhydrogen min−1 molcat−1. This is one of the highest TOF values reported for a noble‐metal‐free catalyst in the literature. Additionally, the yolk–shell structured CoxCu1−xCo2O4@CoyCu1−yCo2O4 microspheres are highly stable and reusable. These yolk–shell structured CoxCu1−xCo2O4@CoyCu1−yCo2O4 microsphere is a promising catalyst candidate in AB hydrolysis considering the excellent catalytic behavior and low cost.

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Section: Comparison Of Tof Values For Some Non‐precious Metal Catalystsmentioning

confidence: 99%

A Simple and Scalable Route to Synthesize Co_xCu₁₋_xCo₂O₄@Co_yCu₁₋_yCo₂O₄ Yolk–Shell Microspheres, A High‐Performance Catalyst to Hydrolyze Ammonia Borane for Hydrogen Production

Lin

et al. 2019

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“…To date, numerous transition metals and their bi(multi)metallic combinationshave been tested as catalysts in the hydrolysis of AB [14] and HB. [15] Amongt he catalysts investigated, it can be easily concluded that the ones including ap reciousm etal (e.g.,P t, Rh, Ru, or Pd) provide the highesta ctivities.…”

mentioning

confidence: 99%

Facile Synthesis of Monodisperse Copper–Platinum Alloy Nanoparticles and Their Superb Catalysis in the Hydrolytic Dehydrogenation of Ammonia Borane and Hydrazine Borane

2017

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Amongt he all emergentc hemical hydrogen-storage materials, B-N-H compounds, especially ammonia borane (AB) and hydrazine borane (HB), appear to be the most favorable ones owing to their advantageous features. However, hydrogen generation from these compounds in an efficient and controllable way is required for the development of new catalytic systems. We report herein af acile wet-chemical synthesis of an ew nanocatalyst, namely,m onodisperse CuPt alloy nanoparticles (NPs) supported on Ketjen Black (KB-CuPt), that exhibits unprecedented catalytic activity in the hydrolytic dehydrogenation of AB and HB with initial turnover frequencies (TOF) of 859 and 832 mol H 2 mol Pt À1 min À1 ,r espectively,u nder ambient conditions. The reported TOF values are record amonga ll Pt-based catalysts that have been tested in both hydrolysis reactions hitherto. This study also includes detailed kinetics of the KB-Cu 68 Pt 32catalyzed hydrolytic dehydrogenation of both AB and HB studied on av ariety of parameters.[a] T. Figure 4. Kineticsoft he KB-Cu 68 Pt 32 -catalyzedh ydrolytic dehydrogenation of hydrazine borane (HB) with different a) alloy compositions {catalyst (5.0 mg, 0.002 mmol Pt), [HB] = 100 mm, T = 298 K}, b) catalysta mounts ([HB] = 100 mm, T = 298 K), c) temperatures {catalyst( 2.5 mg, 0.001 mmol Pt), [HB] = 100 mm}, and d) runs (reusability test).

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“…This can be solved using on‐line gas chromatography (GC) or mass spectrometry (MS). But since these instruments are expensive, and require long calibration procedures, the most commonly used method today is still the trusted upside‐down glass burette . This requires only a beaker, a burette, and some water.…”

Section: Figurementioning

confidence: 99%

A Simple and Efficient Device and Method for Measuring the Kinetics of Gas‐Producing Reactions

2019

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We present a new device for quantifying gases or gas mixtures based on the simple principle of bubble counting. With this device, we can follow reaction kinetics down to volume step sizes of 8–12 μL. This enables the accurate determination of both time and size of these gas quanta, giving a very detailed kinetic analysis. We demonstrate this method and device using ammonia borane hydrolysis as a model reaction, obtaining Arrhenius plots with over 300 data points from a single experiment. Our device not only saves time and avoids frustration, but also offers more insight into reaction kinetics and mechanistic studies. Moreover, its simplicity and low cost open opportunities for many lab applications.

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Carbon dispersed copper-cobalt alloy nanoparticles: A cost-effective heterogeneous catalyst with exceptional performance in the hydrolytic dehydrogenation of ammonia-borane

Cited by 132 publications

References 60 publications

A Simple and Scalable Route to Synthesize Co_xCu₁₋_xCo₂O₄@Co_yCu₁₋_yCo₂O₄ Yolk–Shell Microspheres, A High‐Performance Catalyst to Hydrolyze Ammonia Borane for Hydrogen Production

A Simple and Scalable Route to Synthesize Co_xCu₁₋_xCo₂O₄@Co_yCu₁₋_yCo₂O₄ Yolk–Shell Microspheres, A High‐Performance Catalyst to Hydrolyze Ammonia Borane for Hydrogen Production

Facile Synthesis of Monodisperse Copper–Platinum Alloy Nanoparticles and Their Superb Catalysis in the Hydrolytic Dehydrogenation of Ammonia Borane and Hydrazine Borane

A Simple and Efficient Device and Method for Measuring the Kinetics of Gas‐Producing Reactions

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Carbon dispersed copper-cobalt alloy nanoparticles: A cost-effective heterogeneous catalyst with exceptional performance in the hydrolytic dehydrogenation of ammonia-borane

Cited by 132 publications

References 60 publications

A Simple and Scalable Route to Synthesize CoxCu1−xCo2O4@CoyCu1−yCo2O4 Yolk–Shell Microspheres, A High‐Performance Catalyst to Hydrolyze Ammonia Borane for Hydrogen Production

A Simple and Scalable Route to Synthesize CoxCu1−xCo2O4@CoyCu1−yCo2O4 Yolk–Shell Microspheres, A High‐Performance Catalyst to Hydrolyze Ammonia Borane for Hydrogen Production

Facile Synthesis of Monodisperse Copper–Platinum Alloy Nanoparticles and Their Superb Catalysis in the Hydrolytic Dehydrogenation of Ammonia Borane and Hydrazine Borane

A Simple and Efficient Device and Method for Measuring the Kinetics of Gas‐Producing Reactions

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Product

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A Simple and Scalable Route to Synthesize Co_xCu₁₋_xCo₂O₄@Co_yCu₁₋_yCo₂O₄ Yolk–Shell Microspheres, A High‐Performance Catalyst to Hydrolyze Ammonia Borane for Hydrogen Production

A Simple and Scalable Route to Synthesize Co_xCu₁₋_xCo₂O₄@Co_yCu₁₋_yCo₂O₄ Yolk–Shell Microspheres, A High‐Performance Catalyst to Hydrolyze Ammonia Borane for Hydrogen Production