Bifunctional composite material with ultra-small Ru nanoclusters loaded on MoO3-x nanobelts and preparation method and application of bifunctional composite material

A nano-cluster, composite material technology, applied in electrolysis components, electrodes, electrolysis process, etc., can solve the problems of scarcity of palladium and platinum reserves, restricting large-scale application, high price, etc., and achieves many active sites and excellent electrocatalysis. Activity, low reaction risk effect

Pending Publication Date: 2022-07-22
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, commercial hydrogen evolution catalysts and hydrazine oxidation catalysts are still based on Pt and Pd-based materials with hig

Method used

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  • Bifunctional composite material with ultra-small Ru nanoclusters loaded on MoO3-x nanobelts and preparation method and application of bifunctional composite material
  • Bifunctional composite material with ultra-small Ru nanoclusters loaded on MoO3-x nanobelts and preparation method and application of bifunctional composite material
  • Bifunctional composite material with ultra-small Ru nanoclusters loaded on MoO3-x nanobelts and preparation method and application of bifunctional composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Dissolve 0.5g of ammonium molybdate and chromium chloride in 25mL of deionized water, mix them uniformly by ultrasonic, and then inject 5mL of concentrated nitric acid, continue to stir evenly, and transfer them to the reaction kettle, and place the reaction kettle in an oven for 200 The hydrothermal reaction was carried out at ℃ for 3 hours. After the reaction, the MoO was obtained by centrifugation and washing several times. 3 nanoribbons;

[0032] (2) 0.02g MoO 3 The nanobelts and 2.7 mg of ruthenium chloride were dispersed in 10 mL of water, immersed in ultrasonic waves for 2 hours, freeze-dried, and placed in a tube furnace in an argon-protected hydrogen atmosphere (the volume fraction of hydrogen was 5%) at 350 °C Reduction for 3 hours to obtain ultra-small Ru nanoclusters supported on MoO 3-x Bifunctional composites of nanoribbons.

Embodiment 2

[0034] (1) Dissolve 0.6g of ammonium molybdate and chromium chloride in 25mL of deionized water, mix them uniformly by ultrasonic, and then inject 5mL of concentrated nitric acid, continue to stir them evenly, and transfer them to the reaction kettle. Place the reaction kettle in an oven for 200 The hydrothermal reaction was carried out at ℃ for 4 hours. After the reaction, the MoO was obtained by centrifugation and washing several times. 3 nanoribbons;

[0035] (2) 0.03g MoO 3 The nanobelts and 3.0 mg of ruthenium chloride were dispersed in 10 mL of water, immersed in ultrasonic waves for 3 hours, freeze-dried, and placed in a tube furnace in an argon-protected hydrogen atmosphere (the volume fraction of hydrogen is 10%) at 450 °C Reduction for 2 hours to obtain ultra-small Ru nanoclusters supported on MoO 3-x Bifunctional composites of nanoribbons.

Embodiment 3

[0037] (1) Dissolve 1.0 g of ammonium molybdate and chromium nitrate in 50 mL of deionized water, mix them uniformly by ultrasonic, and then inject 10 mL of concentrated hydrochloric acid, continue to stir evenly, and transfer them to the reaction kettle, and place the reaction kettle in an oven at 180°C Under the hydrothermal reaction for 4 hours, after the reaction, centrifugal washing several times to obtain MoO 3 nanoribbons;

[0038] (2) 0.2g MoO 3 The nanobelts and 27 mg of ruthenium chloride were dispersed in 100 mL of water, immersed in ultrasonic for 3 hours, freeze-dried, and placed in a tube furnace in an argon-protected hydrogen atmosphere (the volume fraction of hydrogen was 5%) at 400 °C Reduction for 2 hours to obtain ultra-small Ru nanoclusters supported on MoO 3-x Bifunctional composites of nanoribbons.

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Abstract

The invention discloses a bifunctional composite material with ultra-small Ru nanoclusters loaded on MoO3-x nanobelts as well as a preparation method and application of the bifunctional composite material. According to the method, a MoO3 nanobelt is used as a carrier, ruthenium salt is used as a metal precursor, and the difunctional composite material with ultra-small Ru nanoclusters loaded on the MoO3-x nanobelt can be obtained through high-temperature reduction. Compared with a traditional material with Ru clusters loaded on other substrates, the method has the advantages that the sub-nano ruthenium clusters can be uniformly embedded in the MoO3-x phase, the composite material is uniform in structure and morphology, and high dispersion is realized. The negative charge regulation and control of MoO3 effectively avoids the agglomeration of Ru and Ostwald ripening in the reaction process. The preparation method is simple in process, has the characteristics of large specific surface area, multiple active sites and the like, shows excellent electrocatalytic activity in alkaline hydrazine oxidation reaction and alkaline water electrolysis device cathode and anode half reaction, and is wide in application range.

Description

technical field [0001] The invention belongs to the preparation technology of ruthenium-based electrocatalyst and the application field thereof, in particular to an ultra-small Ru nano-cluster supported on MoO 3-x Bifunctional composite material of nanoribbon and preparation method and application thereof. Background technique [0002] With the increasingly serious environmental pollution and energy crisis brought about by social and economic development, it is of great significance to develop green and pollution-free clean energy. Hydrogen is considered the energy currency of the 21st century and is widely regarded as an effective way to solve the energy crisis. The commercial production of hydrogen is still based on the cracking of fossil fuels as the main source. However, this process has disadvantages such as poor hydrogen purity, non-green environmental protection and unsustainability. Hydrogen production by electrolysis of water, as an efficient hydrogen production ...

Claims

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Application Information

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IPC IPC(8): C25B11/093C25B11/065C25B1/04
CPCC25B11/093C25B11/065C25B1/04
Inventor 包建春常亚楠刘影刘启成陆徐云马张玉
Owner NANJING NORMAL UNIVERSITY
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