Amorphous NiP supported on rGO for superior hydrogen generation from hydrolysis of ammonia borane

Du, Xiaoqiong; Yang, Chaoyu; Zeng, Xiangli; Wu, Tong; Zhou, Yinghui; Cai, Ping; Cheng, Gongzhen; Luo, Wei

doi:10.1016/j.ijhydene.2017.04.052

Cited by 94 publications

(37 citation statements)

References 54 publications

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“…As shown in Figure S3 in the supporting information, there are no obvious diffraction peaks, implying that those assynthesized samples are in amorphous phases. [36] It has been reported that the features of short-range order and long-range disorder in the amorphous or low degree crystallinity state could boost the overall catalytic performance of the as-obtained catalysts. [37] The X-ray photoelectron spectroscopy (XPS) was carried out to analyse the chemical compositions and the valence state of Co 89.8 Ni 10.2 P 11.7 /rGO and Co 90.3 Ni 9.7 /rGO.…”

Section: In Situ Synthesis Of Nicop Nanoparticles Supported On Reducementioning

confidence: 99%

“…[31] As for the P 2p counterpart (Figure 3c), the binding energy located at 129.8 eV can be assigned to P δÀ , which is negatively shifted for 0.4 eV compared to the standard phosphorus (130.2 eV). [36] The binding energy peak appeared at 133.0 eV is belong to the P 5 + , which is originated from oxidized P. These results indicates that there is a strong electronic interaction among Ni, Co, and P. Furthermore, As shown in Figure S4a, for C1s of Co 89.8 Ni 10.2 P 11.7 /rGO, the binding energy peaks are observed at 284.6 eV, 285.1 eV and 286.1 eV, which can be contributed to sp 2 C, CÀ O and C=O, respectively. The oxygen-containing functional groups À C=O, and À CÀ O are disappeared, while the À COO species is decreased significantly compared with the C1s of GO (Figure.…”

Section: In Situ Synthesis Of Nicop Nanoparticles Supported On Reducementioning

confidence: 99%

“…Graphite oxide (GO) was prepared according to the modified Hummers method. [36] At first, a 9 : 1 mixture of concentrated H 2 SO 4 /H 3 PO 4 (360 : 40 mL) was added to 3.0 g of graphite flakes gradually. Then18.0 g of KMnO 4 was added to the flakes step by step.…”

Section: Preparation Of Graphite Oxide (Go)mentioning

confidence: 99%

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In Situ Synthesis of NiCoP Nanoparticles Supported on Reduced Graphene Oxide for the Catalytic Hydrolysis of Ammonia Borane

Yang

Men

et al. 2019

ChemPlusChem

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Developing highly efficient and stable noble-metal-free catalysts toward catalytic hydrolysis of ammonia borane (AB) for hydrogen storage is highly desirable, but still remains challenging. We report a simple and in situ co-reduction approach to synthesize bimetallic NiCoP nanoparticles (NPs) supported on reduced graphene oxide (rGO). Thanks to the strong electronic interaction between Ni, Co, and P, the as-synthesized Co 89.8 Ni 10.2 P 11.7 /rGO catalyst exhibits superior catalytic performance towards hydrolysis of AB, with the turnover frequency value (TOF) of 18.6 min À 1 , which is about 2.5 times higher than that of NiCo/rGO. Hydrogen has been regarded as a promising alternative to traditional fossil fuels because of its high energy density and environmental benignity. However, safe and efficient storage of hydrogen is still considered as the key issue for the upcoming "hydrogen economy". [1][2][3][4][5] Furthermore, among various hydrogen storage materials which have been reported recently, ammonia borane (NH 3 BH 3 , AB) has been being considered as one of the most promising and suitable candidates owing to its high hydrogen storage capacity (19.6 %), good stability in aqueous solution and environmental benignity. [6][7][8][9] Besides, the hydrolysis of ammonia borane according to [Equation (1)] is regarded as the most efficient way to generate hydrogen.Recently, noble metals, such as Pt, [10][11] Rh, [12][13] and Ru, [14][15] are considered as the most efficient catalysts towards catalytic hydrolysis of AB, however, their further practical applications are severely hindered by the high-cost and scarcity. Therefore, numerous efforts have been devoted to developing nonprecious metal-based catalysts toward hydrolysis of AB with high-efficiency and durability. Accordingly, earth-abundant 3d transition metals (Co, Ni, Fe, Cu, etc.) have been widely studied as the alternatives to the precious metal-based catalysts. [16][17][18][19] Nevertheless, their catalytic performances are still far from practical application. [20][21][22][23] It has been reported that the catalytic performance of transition metal catalysts could be further improved through modifying their d-states at the Fermi level by doping nonmetallic phosphorous (P) with abundant valence electrons. [24][25] The resulting transition metal phosphides (TMPs) with unique charge natures (positive charge in the metal center and negative charge in phosphorous) with hydrogenase-like catalytic mechanism have been widely studied for hydrodesulfurization (HDS) [26][27] and hydrogen evolution reaction (HER). [28][29][30][31] Very recently, TMPs have also been studied as effective catalysts towards hydrogen generation from hydrogen storage materials. For example, Sun and co-workers reported Fe-doped CoP nanoarray could be utilized as an efficient catalyst for hydrogen generation from NaBH 4 . [32] Fu and co-workers reported the synthesis of nanostructured Ni 2 P by reacting Ni(OH) 2 powders with NaH 2 PO 2 at high temperature in argon and its catalytic performance...

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Section: In Situ Synthesis Of Nicop Nanoparticles Supported On Reducementioning

confidence: 99%

Section: In Situ Synthesis Of Nicop Nanoparticles Supported On Reducementioning

confidence: 99%

See 1 more Smart Citation

In Situ Synthesis of NiCoP Nanoparticles Supported on Reduced Graphene Oxide for the Catalytic Hydrolysis of Ammonia Borane

Yang

Men

et al. 2019

ChemPlusChem

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“…Currently, considerable efforts are being devoted to the search for suitable hydrogen storage materials including metal hydrides, sorbent materials, and chemical hydrides . Among them, ammonia borane (NH 3 BH 3 ) has attracted much attention as a hydrogen carrier for portable hydrogen storage applications, owing to its high gravimetric hydrogen density (19.6 wt %), high stability and solubility under ambient conditions, environmentally friendliness, and favorable kinetics for hydrogen release . In the presence of suitable catalysts, ammonia borane releases hydrogen via hydrolysis under ambient conditions.…”

Section: Introductionmentioning

confidence: 99%

“…[3] Amongt hem, ammonia borane (NH 3 BH 3 )h as attracted much attentiona sahydrogenc arrier for portable hydrogen storage applications, owing to its high gravimetric hydrogen density (19.6 wt %), high stability and solubility under ambient conditions, environmentally friendliness, and favorable kinetics for hydrogen release. [4][5][6] In the presence of suitable catalysts, ammonia borane releases hydrogen via hydrolysis under ambient conditions. Therefore, the development of catalysts able to boost the kinetics of hydrogen generation through ammonia borane hydrolysisi sh ighly relevant for both academia and industry.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Water/Titanium Alkoxide Ratio on the Morphology and Catalytic Activity of Titania–Nickel Composite Particles for the Hydrolysis of Ammonia Borane

Umegaki

Yamamoto

et al. 2018

ChemistryOpen

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This work reports the influence of the water/titanium alkoxide ratio during the preparation of titania–nickel composite particles on their morphology and catalytic activity toward the hydrolysis of ammonia borane. The titania–nickel composite particle catalysts were fabricated by using a sol‐gel method, followed by an activation process in aqueous solution containing sodium borohydride and ammonia borane. From the scanning electron microscopy images and pore‐size distributions calculated from nitrogen sorption data, the particle dispersion was significantly enhanced at ratios above 6000, and increased with increasing water/titanium alkoxide ratio. Stoichiometric amounts of hydrogen were evolved in the presence of all of the prepared titania–nickel composite particle catalysts. The particle dispersion influenced the hydrogen evolution rate from aqueous ammonia borane solution, and the samples with the most highly dispersed particles showed the highest hydrogen evolution rate. The most active catalyst showed an apparent activation energy comparable to that of other reported catalysts and high cycle ability for the hydrolysis of ammonia borane.

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Pt|Cu Bimetallic Stratiform Nanocrystal Cluster Hierarchical Frameworks: Robust Catalyst for Hydrolyzing Ammonia Borane to Generate Hydrogen

Zhu

Mao

Zhang

et al. 2022

Adv Materials Inter

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A modified Galvani substitution protocol is proposed to fabricate serial Pt|Cu nanocrystals for hydrolyzing ammonia borane to generate H2 gas. The as‐fabricated Pt|Cu spheroidal nanocrystals with mean size of 75 nm hold porously hierarchical waxberry‐shaped appearance, with more subtle Pt grain cladding on Cu nanospheres to build the nanocrystal cluster frameworks. The lower Pt/Cu molar ratios result in the formation of a razor‐thin sublayer of Pt‐Cu alloy at the bimetallic interface; for the higher Pt/Cu molar ratios, no alloy phase forms, also without formation of probable oxides. The synergic effect contributes to the electron enrichment around Pt, helping to furnish more active sites. The catalytic ability increases with rising of Pt/Cu molar ratios; the Pt|Cu‐0.75 unfolds the abnormality even overtopping Pt NPs, with a turnover frequency value of 78.36 mol (H2)·min–1·(mol Pt)–1 and apparent activation energy of 32.89 kJ·mol–1. The catalytic hydrolytic reaction at the lower temperatures (298, 303 K) is identified as a first‐order reaction, while it belongs to second‐order reaction under the higher temperatures (308, 313, 318 K). The Pt|Cu‐0.75 nanocrystals express satisfactory stability with only 14% loss of the catalytic activity after 5‐time services, and excellent catalytic selectivity with no deleterious gas detected.

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Amorphous NiP supported on rGO for superior hydrogen generation from hydrolysis of ammonia borane

Cited by 94 publications

References 54 publications

In Situ Synthesis of NiCoP Nanoparticles Supported on Reduced Graphene Oxide for the Catalytic Hydrolysis of Ammonia Borane

In Situ Synthesis of NiCoP Nanoparticles Supported on Reduced Graphene Oxide for the Catalytic Hydrolysis of Ammonia Borane

Influence of the Water/Titanium Alkoxide Ratio on the Morphology and Catalytic Activity of Titania–Nickel Composite Particles for the Hydrolysis of Ammonia Borane

Pt|Cu Bimetallic Stratiform Nanocrystal Cluster Hierarchical Frameworks: Robust Catalyst for Hydrolyzing Ammonia Borane to Generate Hydrogen

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