Comparisons of Pt catalysts supported on active carbon, carbon molecular sieve, carbon nanotubes and graphite for HI decomposition at different temperature

Wang, Laijun; Han, Qi; Li, Daocai; Wang, Zhichao; Chen, Jing; Chen, Songzhe; Zhang, Ping; Liu, Baijun; Wen, Ming; Xu, Jingming

doi:10.1016/j.ijhydene.2012.10.052

Cited by 38 publications

(18 citation statements)

References 22 publications

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“…Reactive distillation has an advantage of combining reaction and separation in a single step leading to overall shift of equilibrium towards production of I 2 and H 2 . Pt based catalysts supported on different supports like carbons [27][28][29][30] and oxides [31][32][33][34] have been used as catalysts for HI decomposition reaction during this process. There are few reports on use of nickel based catalyst systems also [35,36].…”

Section: Introductionmentioning

confidence: 99%

Pt/graphite catalyst for hydrogen generation by HI decomposition reaction in S-I thermochemical cycle

Tyagi

Varma

Bharadwaj

2015

Int. J. Energy Res.

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SUMMARYHydrogen is an attractive energy carrier for future because of various reasons. Therefore its large scale production is the need of the hour. One of the ways to achieve this is sulfur iodine thermochemical cycle and HI decomposition reaction is one of the three reactions constituting the cycle. Pt/graphite catalysts with different loading of platinum were prepared by impregnating colloidal graphite with hexachloroplatinic acid solution followed by reduction under N 2 flow. The catalysts prepared have been characterized by X-ray diffraction, Raman, scanning electron microscopy, X-ray photoelectron spectroscopy and Brunauer-Emmett-Teller surface area. These catalysts have been employed for liquid phase HI decomposition under different conditions. To evaluate the stability of this catalyst against noble metal leaching under the reaction conditions, the eluent was analyzed by using ICP-OES. Platinum loaded catalysts (0.5%, 1% and 2%) show 8.4%, 17.5% and 23.4% conversion respectively. From the present study we conclude that Pt/graphite is a suitable and stable catalyst for liquid phase HI decomposition reaction.

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Section: Introductionmentioning

confidence: 99%

Pt/graphite catalyst for hydrogen generation by HI decomposition reaction in S-I thermochemical cycle

Tyagi

Varma

Bharadwaj

2015

Int. J. Energy Res.

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“…[7][8][9][10][11][12][13][14] Furthermore, some CNT-supported metals, such as palladium, ruthenium, platinum,a nd nickel,c an be used for hydrogen production from hydrogeni odide and ammonia decomposition. [15][16][17][18][19][20] In addition to these inorganic reactions, some organic reactionsi nvolving CNT catalysts have also been reported. [21][22][23][24] For instance, Kobayashi and co-workers [24] developed an ickel-based Lewis acid catalysti ntegrated with CNTsf or the asymmetric synthesis of nitrones in water.T herefore,w ee nvisionedt hat othern onnoble-metal-CNTcatalysts could also be prepared for the efficient synthesis of important compounds in organic chemistry or pharmaceutical chemistry.…”

Section: Introductionmentioning

confidence: 99%

A Reusable CNT‐Supported Single‐Atom Iron Catalyst for the Highly Efficient Synthesis of C−N Bonds

Ding

Huang

et al. 2020

Chemistry A European J

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C−N bond formation is regarded as a very useful and fundamental reaction for the synthesis of nitrogen‐containing molecules in both organic and pharmaceutical chemistry. Noble‐metal and homogeneous catalysts have frequently been used for C−N bond formation, however, these catalysts have a number of disadvantages, such as high cost, toxicity, and low atom economy. In this work, a low‐toxic and cheap iron complex (iron ethylene‐1,2‐diamine) has been loaded onto carbon nanotubes (CNTs) to prepare a heterogeneous single‐atom catalyst (SAC) named Fe‐Nx/CNTs. We employed this SAC in the synthesis of C−N bonds for the first time. It was found that Fe‐Nx/CNTs is an efficient catalyst for the synthesis of C−N bonds starting from aromatic amines and ketones. Its catalytic performance was excellent, giving yields of up to 96 %, six‐fold higher than the yields obtained with noble‐metal catalysts, such as AuCl3/CNTs and RhCl3/CNTs. The catalyst showed efficacy in the reactions of thirteen aromatic amine substrates, without the need for additives, and seventeen enaminones were obtained. High‐angle annular dark‐field scanning transmission electron microscopy in combination with X‐ray absorption spectroscopy revealed that the iron species were well dispersed in the Fe‐Nx/CNTs catalyst as single atoms and that Fe‐Nx might be the catalytic active species. This Fe‐Nx/CNTs catalyst has potential industrial applications as it could be cycled seven times without any significant loss of activity.

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“…Reactive distillation has an advantage of combining reaction and separation in a single step, leading to overall shift of equilibrium towards production of I 2 and H 2 [27]. Platinum-based catalysts supported on different supports like oxides [30][31][32] and carbons [33][34][35] have been extensively studied. Platinum-based catalysts supported on different supports like oxides [30][31][32] and carbons [33][34][35] have been extensively studied.…”

Section: Introductionmentioning

confidence: 99%

Pt/zirconia catalyst for hydrogen generation from HI decomposition reaction of S-I cycle

Tyagi

Varma

Bharadwaj

2014

Int. J. Energy Res.

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Summary Hydrogen energy is considered as one of the ideal solutions for the fulfilment of the ever increasing energy demand. It is mainly due to the following two reasons: firstly, it can be produced from a very abundant source, that is, water; and secondly, it does not leave any harmful effect on the environment. Thermochemical cycles are amongst the most promising ways to generate hydrogen from water in an environment‐friendly manner. Sulfur–iodine cycle is one of the most efficient thermochemical cycles. In this paper, we discuss synthesis of Pt/zirconia catalysts for HI decomposition reaction, which is one of the important steps of S–I thermochemical cycle. The catalysts were characterized by X‐ray diffraction, scanning electron microscopy (SEM), field emission gun‐SEM, transmission electron microscopy, N2 adsorption and H2 chemisorption. The catalytic activity and stability of these catalysts, for liquid phase decomposition of hydriodic acid was evaluated. Conversion is found to be dependent on the noble metal loading, with 18.7% conversion for 2% Pt/ZrO2 catalyst as compared with 2.7% of without catalyst, although the specific activity is highest for 0.5% Pt/ZrO2 catalyst. The catalyst was found to be stable under liquid phase HI decomposition reaction conditions. Copyright © 2014 John Wiley & Sons, Ltd.

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Comparisons of Pt catalysts supported on active carbon, carbon molecular sieve, carbon nanotubes and graphite for HI decomposition at different temperature

Cited by 38 publications

References 22 publications

Pt/graphite catalyst for hydrogen generation by HI decomposition reaction in S-I thermochemical cycle

Pt/graphite catalyst for hydrogen generation by HI decomposition reaction in S-I thermochemical cycle

A Reusable CNT‐Supported Single‐Atom Iron Catalyst for the Highly Efficient Synthesis of C−N Bonds

Pt/zirconia catalyst for hydrogen generation from HI decomposition reaction of S-I cycle

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