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Pt/alpha-MoC1-x supported catalyst, and synthesis method and application thereof

A supported catalyst, pt-moo3 technology, applied in the field of catalysis, can solve problems such as inability to exist stably, low activity of noble metal catalysts, and failure to meet the requirements of use, etc., to achieve the goal of inhibiting methanol decomposition reactions, increasing coverage, and wide application prospects Effect

Active Publication Date: 2015-06-17
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional Cu-based catalysts cannot exist stably in the liquid phase, and the activity of oxide-supported noble metal catalysts is extremely low, which does not meet the requirements for use.

Method used

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  • Pt/alpha-MoC1-x supported catalyst, and synthesis method and application thereof
  • Pt/alpha-MoC1-x supported catalyst, and synthesis method and application thereof
  • Pt/alpha-MoC1-x supported catalyst, and synthesis method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1Pt / α-MoC 1-x Synthesis of (100%α) Catalyst (MoO 3 200nm)

[0033] Dissolve 1 g of platinum precursor salt chloroplatinic acid hexahydrate in 10 mL of water, immerse it in H 2 PtCl 6 solution to MoO 3 On the carrier, stir until dry at room temperature, then dry in a vacuum drying oven at 60 °C, then place the catalyst in a muffle furnace for calcination, program the temperature to 500 °C and keep it for 120 min. Last at 20% CH 4 / H 2 In the carbonization atmosphere, the temperature was raised to 700 °C and kept for 120 min.

[0034] Pt / α-MoC synthesized in the present invention 1-x The morphology of the supported catalyst was observed by the dark-field scanning transmission mode of transmission electron microscope, and the bulk phase structure was observed by X-ray diffractometer (XRD).

[0035] The XRD sample preparation method is as follows: the above carbonized catalysts were prepared with 0.5% O 2 / Ar passivation gas passivation for 8h, can be used f...

Embodiment 2

[0040] Example 2Pt / MoC x (70%α) Synthesis

[0041] Dissolve 1 g of platinum precursor salt chloroplatinic acid hexahydrate in 10 mL of water, immerse it in H 2 PtCl 6 The solution was stirred to dryness at room temperature, then dried at 60°C in a vacuum drying oven, and dried in 20% CH 4 / H 2 In the carbonization atmosphere, the temperature was raised to 700 °C and kept for 120 min. XRD pattern such as figure 1 (c).

Embodiment 3

[0042] Example 3Pt / MoC x (45%α) Synthesis

[0043] Dissolve 1 g of ammonium heptamolybdate in 10 mL of deionized water, stir until all dissolved, dissolve 1 g of platinum precursor salt chloroplatinic acid hexahydrate in 10 mL of water, add chloroplatinic acid aqueous solution to the ammonium molybdate solution, and stir for 2 h until precipitation Complete, evaporated to dryness in an oil bath at 100°C, ground and placed in an oven at 60°C for 3 h, and then the catalyst was heated in 20% CH 4 / H 2 Carbonized in the atmosphere, the temperature was programmed to 700 °C and kept for 120 min. XRD pattern such as figure 1 (d).

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Abstract

The invention discloses a Pt / alpha-MoC1-x supported catalyst, and a synthesis method and an application thereof. The method comprises the following steps: dissolving a platinum precursor salt in water, dipping the obtained solution to a MoO3 supporter, stirring until dryness, placing the obtained solid in a 40-60DEG C vacuum drying box, drying, carrying out programmed heating on the dried solid in a muffle furnace to 400-500DEG C, maintaining the temperature at a highest value for a certain time to obtain Pt-MoO3, and carbonizing the obtained solid in a certain proportion of carbonizing gas atmosphere to obtain the Pt / alpha-MoC1-x supported catalyst. The Pt / alpha-MoC1-x supported catalyst used as a good catalyst for preparing hydrogen through low temperature (150-190DEG C) water phase reforming of methanol has better catalysis activity than Pt supported oxide supporters and Pt supported non-pure MoC supporters, and has high stability in stimulation of a truth approaching system.

Description

technical field [0001] The invention belongs to the field of catalysis and relates to a Pt / α-MoC 1-x A supported catalyst and its synthesis and application, in particular to a Pt / α-MoC catalyst with stable aqueous phase, low-temperature and high-efficiency reforming methanol for hydrogen production 1-x Synthesis methods and applications. Background technique [0002] The waste gas and solid particles generated by the use of fossil energy far exceed the automatic purification capacity of the environment. The development of clean energy is not only the fundamental solution to energy problems, but also the key to solving environmental problems. Hydrogen energy is recognized as a clean, high calorific value energy. The most effective use of hydrogen energy is hydrogen fuel cells. Compared with the combustion reaction of internal combustion engines, hydrogen fuel cells can efficiently convert chemical energy into electrical energy, and the utilization rate is increased by 40% t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22C01B3/32
CPCB01J23/42B01J27/22C01B3/32
Inventor 马丁林丽利姚思宇
Owner PEKING UNIV
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