Facile synthesis of NiPt–CeO2 nanocomposite as an efficient catalyst for hydrogen generation from hydrazine borane

Zhang, Zhujun; Wang, Yuqing; Chen, Xiangshu; Lu, Zhang‐Hui

doi:10.1016/j.jpowsour.2015.05.012

Cited by 66 publications

(30 citation statements)

References 42 publications

(25 reference statements)

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“…The release of lattice oxygen is also beneficial in transferring active carbon species on the catalyst surface, thus promoting coke removal [27,28]. [29]. As seen from Figure 9, the peaks (865-869 eV) near 870 eV (Ni 0 of the reduced state) is the lowest in the catalyst without adding CeO 2 , and correspondingly, the 856 eV peak (Ni-O) was relatively the highest.…”

Section: Xpsmentioning

confidence: 96%

“…shows the Ni 2p XPS spectra of the used catalyst after the reaction at 270 °C for 1 h. The electron binding energies of Ni 2p in the Ni-based catalyst were approximately 856.5, 862, and 870 eV, corresponding to the Ni-O bond, the shakeup peaks, and the Ni 0 of the reduced state, respectively[29]. As seen fromFigure 9, the peaks (865-869 eV) near 870 eV (Ni 0 of the reduced state)…”

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Influence of CeO2 Addition to Ni–Cu/HZSM-5 Catalysts on Hydrodeoxygenation of Bio-Oil

et al. 2019

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Hydrodeoxygenation (HDO) of bio-oil is a method of bio-oil upgrading. In this paper, x%CeO2–Ni–Cu/HZSM-5 (x = 5, 15, and 20) was synthesized as an HDO catalyst by the co-impregnation method. The HDO performances of x%CeO2–Ni–Cu/HZSM-5 (x = 5, 15, and 20) in the reaction process was evaluated and compared with Ni–Cu/HZSM-5 by the property and the yield of upgrading oil. The difference of the chemical composition between bio-oil and upgrading oil was evaluated by GC-MS. The results showed that the addition of CeO2 decreased the water and oxygen contents of upgrading oil, increased the high heating value, reduced acid content, and increased hydrocarbon content. When the CeO2 addition was 15%, the yield of upgrading reached the maximum, from 33.9 wt% (Ni–Cu/HZSM-5) to 47.6 wt% (15%CeO2–Ni–Cu/HZSM-5). The catalytic activities of x%CeO2–Ni–Cu/HZSM-5 (x = 5, 15, and 20) and Ni–Cu/HZSM-5 were characterized by XRD, N2 adsorption–desorption, NH3-Temperature-Programmed Desorption, H2-Temperature-Programmed Reaction, TEM, and XPS. The results showed that the addition of CeO2 increased the dispersion of active metal Ni, reduced the bond between the active metal and the catalyst support, increased the ratio of Bronsted acid to total acids, and decreased the reduction temperature of NiO. When the CeO2 addition was 15%, the activity of catalyst reached the best. Finally, the carbon deposition resistance of deactivated catalysts was investigated by a Thermogravimetric (TG) analysis, and the results showed that the addition of CeO2 could improve the carbon deposition resistance of catalysts. When the CeO2 addition was 15%, the coke deposition decreased from 41 wt% (Ni–Cu/HZSM-5) to 14 wt% (15%CeO2–Ni–Cu/HZSM-5).

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Section: Xpsmentioning

confidence: 96%

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confidence: 99%

Influence of CeO2 Addition to Ni–Cu/HZSM-5 Catalysts on Hydrodeoxygenation of Bio-Oil

et al. 2019

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“…However,t he practical use of Pt in catalytic applications, especially in energy-related ones, is limited owing to its scarcity and high cost. [20] Althought here are many reports on the synthesis and applications of monometallic Pt NPs in the hydrolytic dehydrogenation of AB and HB, [21] upon examining the literature for bimetallic Pt NPs, we discovered that there weren oe xamples of CuPt alloy NPs that were employeda sc atalysts in the dehydrogenation of either AB or HB. In this respect,p reciousm etal-based nanoparticles (NPs) are widely used in heterogeneous catalysis owing to their small particle sizes, which optimize the dispersion of these metals and results in anomalous catalytic activities not observedf or the bulk metals.…”

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confidence: 97%

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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“…However, Ru@SBA-15 NCs can only release the hydrogen of HB by the hydrolysis of -BH 3 group of HB. Recent researches have shown that the complete hydrogen generation from HB (5 equivalents of H 2 ) can be achieved via both the hydrolysis of -BH 3 group and the decomposition of the -N 2 H 4 group by using Ni-M (M = Pt, Ru, Rh) nanocatalysts, which further enhances the importance of the use of HB as the chemical hydrogen storage 7 8 9 57 58 59 60 , However, the catalytic activity for the high-extent dehydrogenation of HB is relatively low in the presence of these nanocatalysts, and the highest TOF value reported so far is ~11 mol H 2 (mol metal min) −1 by using Ni 0.6 Pt 0.4 /MSC-30 as the catalysts 57 . Our preliminary results show that the Ru-Ni@SBA-15 catalytic system displays a high activity for the complete hydrogen generation from HB and this research is still in process.…”

Section: Discussionmentioning

confidence: 99%

Ruthenium nanoparticles confined in SBA-15 as highly efficient catalyst for hydrolytic dehydrogenation of ammonia borane and hydrazine borane

Yao

Yang

et al. 2015

Sci Rep

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107

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Ultrafine ruthenium nanoparticles (NPs) within the mesopores of the SBA-15 have been successfully prepared by using a “double solvents” method, in which n-hexane is used as a hydrophobic solvent and RuCl3 aqueous solution is used as a hydrophilic solvent. After the impregnation and reduction processes, the samples were characterized by XRD, TEM, EDX, XPS, N2 adsorption-desorption, and ICP techniques. The TEM images show that small sized Ru NPs with an average size of 3.0 ± 0.8 nm are uniformly dispersed in the mesopores of SBA-15. The as-synthesized Ru@SBA-15 nanocomposites (NCs) display exceptional catalytic activity for hydrogen generation by the hydrolysis of ammonia borane (NH3BH3, AB) and hydrazine borane (N2H4BH3, HB) at room temperature with the turnover frequency (TOF) value of 316 and 706 mol H2 (mol Ru min)−1, respectively, relatively high values reported so far for the same reaction. The activation energies (Ea) for the hydrolysis of AB and HB catalyzed by Ru@SBA-15 NCs are measured to be 34.8 ± 2 and 41.3 ± 2 kJ mol−1, respectively. Moreover, Ru@SBA-15 NCs also show satisfied durable stability for the hydrolytic dehydrogenation of AB and HB, respectively.

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Facile synthesis of NiPt–CeO2 nanocomposite as an efficient catalyst for hydrogen generation from hydrazine borane

Cited by 66 publications

References 42 publications

Influence of CeO2 Addition to Ni–Cu/HZSM-5 Catalysts on Hydrodeoxygenation of Bio-Oil

Influence of CeO2 Addition to Ni–Cu/HZSM-5 Catalysts on Hydrodeoxygenation of Bio-Oil

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

Ruthenium nanoparticles confined in SBA-15 as highly efficient catalyst for hydrolytic dehydrogenation of ammonia borane and hydrazine borane

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