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A carbon-supported platinum-cobalt-rhodium nanorod catalyst for acidic hydrogen evolution reaction and its preparation method and application

A nanorod-like, catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of low intrinsic activity, performance gap, hydrogen evolution electrocatalyst The problem of poor morphology uniformity, etc., achieves the effect of good morphology uniformity, improved intrinsic activity, and increased electrochemical activity specific surface area.

Active Publication Date: 2021-01-15
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, there have been no reports of related low-noble metal nanorod electrocatalysts suitable for cathodic hydrogen evolution reactions in acidic water electrolysis.
[0005] To sum up, the morphology uniformity of hydrogen evolution electrocatalysts in the reported articles or patents is poor, or the intrinsic activity is low, and the performance of non-noble metal electrocatalysts is still partially inferior to that of commercial Pt / C electrocatalysts.

Method used

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  • A carbon-supported platinum-cobalt-rhodium nanorod catalyst for acidic hydrogen evolution reaction and its preparation method and application
  • A carbon-supported platinum-cobalt-rhodium nanorod catalyst for acidic hydrogen evolution reaction and its preparation method and application
  • A carbon-supported platinum-cobalt-rhodium nanorod catalyst for acidic hydrogen evolution reaction and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0046] Platinum acetylacetonate (5mmol L -1 ), cobalt acetylacetonate (5mmol L -1 ), rhodium acetylacetonate (0.5mmol L -1 ), didodecyldimethylammonium bromide (18mg mL -1 ) and molybdenum hexacarbonyl (6mg mL -1 ) were mixed and dissolved in oleylamine, ultrasonicated for 0.5h, then nitrogen protective gas was introduced and the reaction device was sealed, and the reaction was carried out at 185°C for 5h to obtain a black mixed solution, which was centrifuged at 8000-10000 rpm After 3 to 5 minutes, the supernatant was removed, and the lower precipitate was washed with a mixed solution of cyclohexane and ethanol (the volume ratio of cyclohexane and ethanol was 1), centrifuged and cleaned again, and circulated for 3-5 times, and the obtained nanocrystals were combined Dispersed in cyclohexane solution (2mg mL -1 )middle. Disperse the carbon carrier EC600 in ethanol solution (2mg mL -1 ), add nanocrystal cyclohexane suspension; ultrasonic the mixed suspension for 0.5h, the...

Embodiment 2

[0054] Platinum acetylacetonate (5mmol L -1 ), cobalt acetylacetonate (5mmol L -1 ), rhodium acetylacetonate (1mmol L -1 ), didodecyldimethylammonium bromide (18mg mL -1 ) and molybdenum hexacarbonyl (6mg mL -1 ) were mixed and dissolved in oleylamine, ultrasonicated for 0.5h, then nitrogen protective gas was introduced and the reaction device was sealed, and the reaction was carried out at 185°C for 5h to obtain a black mixed solution, which was centrifuged at 8000-10000 rpm After 3 to 5 minutes, the supernatant was removed, and the lower precipitate was washed with a mixed solution of cyclohexane and ethanol (the volume ratio of cyclohexane and ethanol was 1), centrifuged and cleaned again, and circulated for 3-5 times, and the obtained nanocrystals were combined Dispersed in cyclohexane solution (2mg mL -1 )middle. Disperse the carbon carrier EC600 in ethanol solution (2mg mL -1 ), add nanocrystal cyclohexane suspension; ultrasonic the mixed suspension for 0.5h, then ...

Embodiment 3

[0061] Platinum acetylacetonate (5mmol L -1 ), cobalt acetylacetonate (5mmol L -1 ), rhodium acetylacetonate (0.5mmol L -1 ), cetyltrimethylammonium bromide (18mg mL -1 ) and molybdenum hexacarbonyl (6mg mL -1 ) were mixed and dissolved in oleylamine, ultrasonicated for 0.5h, then nitrogen protective gas was introduced and the reaction device was sealed, and the reaction was carried out at 185°C for 5h to obtain a black mixed solution, which was centrifuged at 8000-10000 rpm After 3 to 5 minutes, the supernatant was removed, and the lower precipitate was washed with a mixed solution of cyclohexane and ethanol (the volume ratio of cyclohexane and ethanol was 1), centrifuged and cleaned again, and circulated for 3-5 times, and the obtained nanocrystals were combined Dispersed in cyclohexane solution (2mg mL -1 )middle. Disperse the carbon carrier VXC72 in ethanol solution (2mg mL -1 ), add nanocrystal cyclohexane suspension; ultrasonic the mixed suspension for 0.5h, then c...

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Abstract

The invention discloses a carbon-supported platinum-cobalt-rhodium nanorod catalyst for acidic hydrogen evolution reaction and its preparation method and application, and belongs to the technical field of electrocatalysts. The present invention uses a solvothermal method and introduces gas protection to prepare uniformly dispersed platinum, cobalt and rhodium metal nanorod crystals with smaller diameters, and then centrifugally cleans them multiple times to obtain a clean surface, and finally obtains low precious metal loading (10-20wt%) As an electrocatalyst, the prepared supported catalyst is platinum, cobalt and rhodium nanorod-shaped crystals evenly dispersed on the surface of the carbon carrier. The nanocrystals obtained by the present invention have smaller diameters, good size uniformity and dispersion, higher electrochemical activity specific surface area and intrinsic activity, and relatively excellent electrocatalytic activity, and are suitable for cathode hydrogen evolution reactions in acidic water electrolysis. .

Description

technical field [0001] The invention belongs to the technical field of electrocatalysts, and relates to a carbon-supported platinum-cobalt-rhodium nanorod catalyst for acidic hydrogen evolution reaction, a preparation method and application thereof. Background technique [0002] At present, the global energy and environmental problems are becoming more and more serious. The development of environmentally friendly and sustainable energy and its clean, efficient and zero-emission utilization are the current important directions for the development of global energy technology. Hydrogen energy is such a green and clean energy. Water electrolysis hydrogen production technology can convert currently developed renewable but intermittent energy sources (such as solar energy and wind energy) into hydrogen to achieve energy storage, which greatly reduces the production capacity due to natural resources. The loss caused by the excess contributes to the consumption of these types of cle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J35/02B01J35/10C25B1/04B01J35/00
CPCB01J23/8913C25B1/04C25B11/097B01J35/40B01J35/33B01J35/61Y02E60/36
Inventor 宋玉江高蕊
Owner DALIAN UNIV OF TECH
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