Increasing Pt methanol oxidation reaction activity and durability with a titanium molybdenum nitride catalyst support

Xiao, Yonghao; Fu, Zhenggao; Zhan, Guohe; Pan, Zhanchang; Xiao, Chumin; Wu, Shoukun; Chen, Chun; Hu, Guanghui; Wei, Zhigang

doi:10.1016/j.jpowsour.2014.09.057

Cited by 83 publications

(47 citation statements)

References 44 publications

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“…Electrochemically active specific surface areas (ECSA) were analyzed by the oxidation of a CO monolayer, assuming 420 µC cm −2 . Standardization of the real Pt mass by inductively coupled plasma atomic emission spectrometry (ICP‐AES), 3D Pt‐g‐C 3 N 4 ‐rGO exhibits an ECSA value of 80.3 m 2 g −1 , which is far higher than that those of Pt‐g‐C 3 N 4 ‐rGO‐NS (72.2 m 2 g −1 ), Pt‐rGO (68.7 m 2 g −1 ), Pt‐CNT (61.3 m 2 g −1 ), Pt‐AC (44 m 2 g −1 ), and recent state‐of‐the‐art Pt‐based nanocatalysts including Pt‐Ni 2 P/C (69.34 m 2 g −1 ), Pt‐Pd alloy nanoflowers (18.56 m 2 g −1 ), Pd‐Pt nanosheres/RGO (68.1 m 2 g −1 ), Pt/Ti 0.8 Mo 0.2 N (54.9 m 2 g −1 ), Pt nanowires/Vulcan (76.7 m 2 g −1 ), Pt/ionic liquid/CNT (67.6 m 2 g −1 ), etc. This suggests that 3D Pt‐g‐C 3 N 4 ‐rGO not only possesses plenty of catalytically active sites, but also provides more electrochemically accessible surface, which are conducive to electrocatalytic reactions.…”

Section: Resultsmentioning

confidence: 99%

3D Hierarchically Porous Graphitic Carbon Nitride Modified Graphene‐Pt Hybrid as Efficient Methanol Oxidation Catalysts

Zhang

Wang

et al. 2017

Adv Materials Inter

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reducing the amount of Pt, for example, to construct hybrids electrode materials incorporating Pt-based nanocatalysts into carbon support materials, such as porous carbons, [5] carbon nanotubes (CNT), [6,7] and graphene sheets. [8] To improve the surface of chemically inert carbon materials as well as to introduce microspores, several different strategies have been investigated. A useful strategy is chemical activation by using alkali hydroxides as activating agents for pulling in microspores with narrow distribution and increasing their surface areas. [9] Another efficient strategy is heteroatom doping. Recent studies have demonstrated that it is conductive to modulate the electronic structures and chemical reactivity of carbon materials, resulting in the remarkably enhanced catalytic ability. [10] To date, a variety of heteroatom-doped carbon materials and carbon-based hybrids have been developed, such as nitrogen, phosphorus, or boron-doped carbon black, [11] carbon nanotubes, [12] or graphene, [13] nitrogen and sulfur-codoped graphene, [14] and carbon nitride-graphene hybrids. [15][16][17] It is noteworthy that incorporation of heteroatoms into the frameworks of carbon materials can help to remove the absorbed poisoning intermediates, thus ensuring the high exposure of the active sites and promoting the catalytic reaction. [18,19] In particular, graphitic carbon nitride (g-C 3 N 4 ), as a typical nitrogen-rich carbon materials, has become a hot topic of interest due to its remarkable properties including ideal 2D structure, ultrahigh nitrogen content, excellent chemical and thermal stability, which can be applied in a wide range of areas such as metalfree catalysts for water splitting, [20] CO 2 fixation, [21] organic pollutant degradation, [22] and so on.On the other hand, nanostructured materials with hierarchically multimodal pore-size distributions have become a hot topic of interest in the catalytic community owing to that they combine the micro and mesoporosity with the macroporous networks. [23] Rich mesoporosity brings large specific surface areas and the robust macropores lead to accessible diffusion pathways. 3D graphene-based frameworks, such as hydrogel, [24] aerogels, [25,26] foams, [27] and sponges, [28] are an important class of new-generation template-free hierarchically porous materials. 3D graphene-based materials are probably upgraded by the recognition that their high specific surface area and intimate A 3D hierarchically porous carbon nanocomposite constituting of graphitic carbon nitride (g-C 3 N 4 ) chemically integrated with reduced graphene oxide (rGO) via covalent CN bonds is reported. This porous nanocomposite has high nitrogen content, large surface area, interconnected porous networks, and good electrical conductivity, and is used to load Pt nanoparticles to form 3D Pt-g-C 3 N 4 -rGO catalyst for direct methanol fuel cell anode. The catalyst shows an unusual electrocatalytic ability toward methanol electrooxidation, such as high activity, intriguing poison tolerance, and rel...

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Section: Resultsmentioning

confidence: 99%

3D Hierarchically Porous Graphitic Carbon Nitride Modified Graphene‐Pt Hybrid as Efficient Methanol Oxidation Catalysts

Zhang

Wang

et al. 2017

Adv Materials Inter

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“…From Figure 5f there can also be found different crystal phases that overlap together. This is evidence that BTMNs were formed from two different TMNs and shows both their advantages with well-dispersed nanoparticles of BTMNs [24]. Figure S2 shown the particles shape of three samples after the reaction.…”

Section: Characteristics Of Fresh and Used Samplesmentioning

confidence: 68%

Activated Carbon Supported Mo-Ti-N Binary Transition Metal Nitride as Catalyst for Acetylene Hydrochlorination

Ding

Zhang

et al. 2017

Catalysts

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Abstract:Recently, many scientists have focused on the development of green industrial technology. However, the process of synthesizing vinyl chloride faces the problem of Hg pollution. Via a novel approach, we used two elements Mo and Ti to prepare an inexpensive and green binary transition metal nitride (BTMN) as the active ingredient in a catalyst with nano-sized particles and an excellent degree of activation, which was supported on activated carbon. When the Mo/Ti mole ratio was 3:1, the conversion of acetylene reached 89% and the selectivity exceeded 98.5%. The doping of Ti in Mo-based catalysts reduced the capacity of adsorption for acetylene and also increased the adsorption of hydrogen chloride. Most importantly, the performance of the BTMN excelled those of the individual transition metal nitrides, due to the synergistic activity between Mo and Ti. This will expand the new epoch of the employment of transition metal nitrides as catalysts in the hydrochlorination of acetylene reaction.

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“…obtained activities in the range of 25–100 mA mg Pt −1 with Pt‐AlOOH‐SiO 2 /graphene hybrid nanomaterials of different composition . A catalyst that consisted of Pt nanoparticles supported on titanium nitride was investigated by Xiao et al . They reported an activity of 64.92 mA mg Pt −1 for Pt/TiNi catalyst at 0.6 V (vs. Ag/AgCl).…”

Section: Resultsmentioning

confidence: 99%

Manganese (II,III) Oxide‐Activated Carbon Black Supported PtRu Nanoparticles for Methanol Electrooxidation in Acid Medium

et al. 2018

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In this work, PtRu nanoparticles supported on hybrid manganese (II,III)‐carbon composites were prepared by a microwave‐assisted polyol process in ethylene glycol. The obtained PtRu/(100‐x) C.xMn3O4 catalysts were characterized by XRD diffraction, TEM, SEM‐EDX analysis, ICP‐AES and electrochemical techniques. Small and well‐distributed nanoparticles of about 2.6 nm were obtained over the hybrid support. The as‐prepared catalysts presented similar Pt : Ru atomic ratio (ca. 3.4 : 1), indicating that the composition of the bimetallic system is unaffected by the oxide content in the hybrid support. However, the noble metal loading increased with the increase in the oxide content due to the formation of more nucleation sites during microwave heating. The electrochemical experiments showed that the best performance and the lowest poisoning rate are obtained with PtRu/90C.10Mn3O4 followed by PtRu/70C.30Mn3O4. The bimetallic catalyst supported over 90C.10Mn3O4 exhibited a steady current density of 215 mA mgPtRu−1 at 0.5 V, which is 40 % higher than that of PtRu/C. This behavior is mainly associated with the ability of Mn3O4 to provide a large extra amount of hydroxyl groups and promote the dehydrogenation of methanol.

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Increasing Pt methanol oxidation reaction activity and durability with a titanium molybdenum nitride catalyst support

Cited by 83 publications

References 44 publications

3D Hierarchically Porous Graphitic Carbon Nitride Modified Graphene‐Pt Hybrid as Efficient Methanol Oxidation Catalysts

3D Hierarchically Porous Graphitic Carbon Nitride Modified Graphene‐Pt Hybrid as Efficient Methanol Oxidation Catalysts

Activated Carbon Supported Mo-Ti-N Binary Transition Metal Nitride as Catalyst for Acetylene Hydrochlorination

Manganese (II,III) Oxide‐Activated Carbon Black Supported PtRu Nanoparticles for Methanol Electrooxidation in Acid Medium

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