Boron nitride supported Ni nanoparticles as catalysts for hydrogen generation from hydrolysis of ammonia borane

Yang, Xiaojing; Li, L.L.; Sang, W.L.; Zhao, Jianling; Wang, X.X.; Yu, Chao; Zhang, X.H.; Tang, Chengchun

doi:10.1016/j.jallcom.2016.09.204

Cited by 55 publications

(14 citation statements)

References 38 publications

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“…Therefore, from the viewpoint of practical application, the development of low‐cost and high‐efficient noble‐metal‐free catalysts to further improve the catalytic activity, selectivity, and conversion rate under moderate conditions is the key to realize safe and efficient hydrogen storage, thus could provide more possibilities to enter H 2 economy society. Boron nitride (BN), a material analogous to the structure of graphite, has been considered as a promising catalyst support owing to its high chemical stability, nontoxicity, and large surface area …”

Section: Methodsmentioning

confidence: 99%

Noble‐Metal‐Free Ni‐MoO_x Nanoparticles Supported on BN as a Highly Efficient Catalyst toward Complete Decomposition of Hydrazine Borane

Xia

Wulan

et al. 2018

Small Methods

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2 (g) + 2H 2 (g)). [4] This corresponds to a theoretical gravimetric hydrogen storage capacity of 10.0 wt% for the HB-3H 2 O system, which is much higher than those of NaBH 4 -4H 2 O (7.3 wt%), NH 3 BH 3 -4H 2 O (5.9 wt%), and N 2 H 4 ·H 2 O (8.0 wt%). [5] However, in order to maximize the efficiency of N 2 H 4 BH 3 as hydrogen storage materials, the incomplete and undesired decomposition (3N 2 H 4 → 4NH 3 (g) + N 2 (g)) to ammonia (NH 3 ) must be avoided, because ammonia is toxic to fuel cell catalysts. [6] It has been reported that monometallic nanoparticles (NPs), such as Ni, Ru, and Pd, are only effective in hydrolyzing BH 3 group in HB as N 2 H 4 moiety does not participate, corresponding to a conversion of 50%. [7] Recently, some noble-metal-containing (e.g., Pt, Rh, and Pd) Ni-based heterogeneous catalysts have been developed as catalysts for high-extent dehydrogenation of HB, although the conversion and activity has been improved, the limited resources and expensive cost of noble metal still hinder their practical applications. [8] Therefore, from the viewpoint of practical application, the development of low-cost and high-efficient noble-metal-free catalysts to further improve the catalytic activity, selectivity, and conversion rate under moderate conditions is the key to realize safe and efficient hydrogen storage, thus could provide more possibilities to enter H 2 economy society. Boron nitride (BN), a material analogous to the structure of graphite, has been considered as a promising catalyst support owing to its high chemical stability, nontoxicity, and large surface area. [9] Herein, we first report a facile methodology for synthesizing BN-supported noble-metal-free Ni-MoO x /BN nanocatalyst without the help of a surfactant by a sequential impregnationreduction approach. Unexpectedly, the resultant Ni-MoO x /BN leads to the 100% conversion, 100% H 2 selectivity, and superior catalytic activity toward the dehydrogenation of HB in an alkaline solution at 323 K, with a turnover frequency (TOF) value of 600.0 h −1 , which is even better than most of the noble metal heterogeneous catalysts. [8,10] Ni-MoO x /BN composite is synthesized by a wet-chemical method as illustrated in Scheme 1. First, BN (15 mg) is dispersed in H 2 O (5 mL) through sonicating treatment. Subsequently, NiCl 2 ·6H 2 O (0.1 m, 1 mL) and Na 2 MoO 4 ·2H 2 O (0.1 m, 1 mL) aqueous solutions are impregnated to the BN Hydrazine borane (HB) has been considered as a promising hydrogen storage material due to its high hydrogen content and stability at room temperature. For the first time, a facile wet-chemical method is developed to synthesize amorphous/low crystalline noble-metal-free Ni-MoO x /BN composite as a lowcost and high-efficient catalyst for hydrogen generation from HB decomposition. The as-prepared Ni-MoO x /BN hybrid exerts 100% selective conversion and can catalyze HB complete decomposition within 5 min, corresponding to a turnover frequency (TOF) value of 600.0 h −1 at 323 K. The excellent catalytic activity may be attribut...

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Section: Methodsmentioning

confidence: 99%

Noble‐Metal‐Free Ni‐MoO_x Nanoparticles Supported on BN as a Highly Efficient Catalyst toward Complete Decomposition of Hydrazine Borane

Xia

Wulan

et al. 2018

Small Methods

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“…Due to the above-mentioned properties, BNNSs have been proposed in many applications, for instance, as an effective spherical catalyst support. 11 − 13 It was recently shown that BNNSs possess considerable biocompatibility 6 , 14 and water dispersibility 15 compared to carbon materials; therefore, medical applications have emerged. 15 , 16 For instance, targeted drug delivery has also been considered.…”

Section: Introductionmentioning

confidence: 99%

Specific Ion Effects on Aggregation and Charging Properties of Boron Nitride Nanospheres

et al. 2021

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The charging and aggregation properties of boron nitride nanospheres (BNNSs) were investigated in the presence of electrolytes of different compositions and valences in aqueous suspensions. The influence of mono- and multivalent cations (counterions) and anions (coions) on the colloidal stability of the negatively charged particles was studied over a wide range of salt concentrations. For monovalent ions, similar trends were determined in the stability and charging of the particles irrespective of the salt composition, i.e., no ion-specific effects were observed. Once multivalent counterions were involved, the critical coagulation concentrations (CCCs) decreased with the valence in line with the direct Schulze–Hardy rule. The dependence indicated an intermediate charge density for BNNSs. The influence of the coions on the CCCs was weaker and the destabilization ability followed the inverse Schulze–Hardy rule. The predominant interparticle forces were identified as electrical double-layer repulsion and van der Waals attraction. These findings offer useful information to design stable BNNS dispersions in various applications, where mono- and multivalent electrolytes or their mixtures are present in the samples.

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“…The doping of BN sheet by a TM atom is an e cient way to improve signi cantly its chemical stability, electronic and catalytic properties. The experimental studies show that the reactivity of the BN nanosheet was greatly increased when the metal clusters of small size are dispersed over its large surface [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of the guanine molecule over the pristine, Nb-, and Au-doped boron nitride nanosheets: a DFT study

Derdare

Boudjahem

2021

Struct Chem

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A theoretical study has been performed onto the pristine, Nb-and Au-doped boron nitride (BN) nanosheets using DFT calculations with the B3LYP-D3 method in order to evaluate their stabilities and electronic properties. The interaction of the guanine molecule with these clusters was also examined in aim to determine their adsorption properties. The calculations show that the HOMO-LUMO energy gap (E g ) of the BN nanosheet was strongly decreased upon its doping with Nb and Au atoms, implying a strong enhancement in its surface reactivity. The interaction of the guanine with the BN sheet was found to be weak, which leads a slight variation in its energy gap, therefore a low sensitivity of this nanosheet toward the guanine was observed. The guanine adsorption over the NbBN cluster is very strong, and the calculated adsorptions energies are in the range of -36.7 to -60.2 kcal mol -1 , suggesting a great chemical adsorption. For the AuBN cluster, the guanine molecule has been chemisorbed onto its surface with adsorption energies varying of -24.2 to -38.4 kcal mol -1 , which are lower than those obtained for the NbBN cluster. Upon adsorption proceess, the energy gap of the NbBN cluster was greatly increased, which leads to a decrease in its electric conductivity, thereby it cannot be a suitable sensor for the guanine molecule. On the contrary, the energy gap of the AuBN cluster was reduced by the effect of the guanine adsorption on its surface, indicating an increase in its electrical conductivity, thus the AuBN cluster possess a great electronic sensitivity to the guanine molecule. Based on the transition state theory, the recovery time of the guanine from the AuBN cluster was estimated of 27.6 s, re ecting that the Audoped BN nanosheet could be employed as an appropriate nanomaterial for the guanine molecule detection with a short recovery time.

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Boron nitride supported Ni nanoparticles as catalysts for hydrogen generation from hydrolysis of ammonia borane

Cited by 55 publications

References 38 publications

Noble‐Metal‐Free Ni‐MoO_x Nanoparticles Supported on BN as a Highly Efficient Catalyst toward Complete Decomposition of Hydrazine Borane

Noble‐Metal‐Free Ni‐MoO_x Nanoparticles Supported on BN as a Highly Efficient Catalyst toward Complete Decomposition of Hydrazine Borane

Specific Ion Effects on Aggregation and Charging Properties of Boron Nitride Nanospheres

Adsorption of the guanine molecule over the pristine, Nb-, and Au-doped boron nitride nanosheets: a DFT study

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Boron nitride supported Ni nanoparticles as catalysts for hydrogen generation from hydrolysis of ammonia borane

Cited by 55 publications

References 38 publications

Noble‐Metal‐Free Ni‐MoOx Nanoparticles Supported on BN as a Highly Efficient Catalyst toward Complete Decomposition of Hydrazine Borane

Noble‐Metal‐Free Ni‐MoOx Nanoparticles Supported on BN as a Highly Efficient Catalyst toward Complete Decomposition of Hydrazine Borane

Specific Ion Effects on Aggregation and Charging Properties of Boron Nitride Nanospheres

Adsorption of the guanine molecule over the pristine, Nb-, and Au-doped boron nitride nanosheets: a DFT study

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Noble‐Metal‐Free Ni‐MoO_x Nanoparticles Supported on BN as a Highly Efficient Catalyst toward Complete Decomposition of Hydrazine Borane

Noble‐Metal‐Free Ni‐MoO_x Nanoparticles Supported on BN as a Highly Efficient Catalyst toward Complete Decomposition of Hydrazine Borane