Palladium-based catalyst carrier for direct formic acid fuel cell and preparation method thereof

A formic acid fuel cell and catalyst carrier technology, applied in fuel cells, battery electrodes, electrochemical generators, etc., can solve the problems of poor interaction between carriers and active metal particles, insufficient stability of Pd catalysts, poor stability of carrier materials, etc. , to achieve the effects of reducing the loading of precious metals, making the preparation method simple and feasible, and improving the corrosion resistance

Inactive Publication Date: 2018-10-09
HARBIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The present invention aims to solve the problem that the stability of the Pd catalyst of the existing direct formic acid fuel cell is not good enough, and the performance is significantly reduced after long-term operation, while the existing C carrier used in the Pd catalyst is easily corroded in the working environment of the fuel cell, and the gap between the carrier and the active metal particles Interaction is poor, the poor stability of support material causes the problem of low catalyst activity, and provides a kind of direct formic acid fuel cell palladium-based catalyst support and preparation method thereof

Method used

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  • Palladium-based catalyst carrier for direct formic acid fuel cell and preparation method thereof
  • Palladium-based catalyst carrier for direct formic acid fuel cell and preparation method thereof
  • Palladium-based catalyst carrier for direct formic acid fuel cell and preparation method thereof

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specific Embodiment approach 1

[0023] Specific embodiment 1: A palladium-based catalyst carrier for a direct formic acid fuel cell in this embodiment is to add a precursor of tungsten, an intermediate of cerium and a carbon material into a solvent, and then undergo ultrasonic dispersion, drying, calcination and grinding to obtain Carrier WO 3 -CeO 2 @C; the precursor of tungsten is ammonium tungstate, ammonium paratungstate or ammonium metatungstate;

[0024] The intermediate of cerium is specifically prepared according to the following steps: the precursor of cerium is added to water to obtain a saturated solution of the precursor of cerium, and the saturated solution of the precursor of cerium is adjusted by using ammonia water with a mass percentage of 9% to 11%. The pH value of the cerium is 8-12, and then under stirring conditions, the temperature of the precursor saturated solution of cerium with a pH value of 8-12 is heated to 50°C-90°C, and the reaction is carried out at a temperature of 50°C-90°C ...

specific Embodiment approach 2

[0029] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the cerium salt is cerium nitrate or cerium sulfate. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0030] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the precursor of cerium is added to water to obtain a saturated solution of the precursor of cerium, and the precursor of cerium is adjusted by using ammonia water with a mass percentage of 10% The pH value of the precursor saturated solution is 10, and then under stirring conditions, the temperature of the precursor saturated solution of cerium with a pH value of 10 is heated to 80 ° C, and the temperature is 80 ° C under the condition of reaction for 3 hours, after aging, filtering, Washing and drying give intermediates of cerium. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a palladium-based catalyst carrier for a direct formic acid fuel cell and a preparation method thereof, relates to a catalyst carrier and a preparation method thereof, and aimsto solve the problems that the stability of a Pd catalyst of the existing direct formic acid fuel cell is not good enough, the performance significantly decreases after long-term operation, but the existing C carrier is easily corroded in the working environment of the fuel cell when being applied to the Pd catalyst, interaction between the carrier and active metal particles is poor, and the activity of the catalyst is low due to poor stability of a carrier material. The palladium-based catalyst carrier for the direct formic acid fuel cell is prepared by adding a precursor of tungsten, an intermediate of cerium and a carbon material into a solvent, then ultrasonically dispersing, drying, calcinating and grinding. The preparation method comprises the following steps: adding the precursor of tungsten, the intermediate of cerium and the carbon material into the solvent, then ultrasonically dispersing, drying, calcinating and grinding.

Description

technical field [0001] The invention relates to a catalyst carrier and a preparation method thereof. Background technique [0002] Direct formic acid fuel cell (DFAFC) is considered to be an ideal power source for automobiles and portable electronic devices due to its high power density and low operating temperature, and has broad application prospects. At present, the performance and cost of DFAFC still cannot meet the requirements of commercialization. Inhibiting its development, the main factors are high catalyst cost, poor catalytic activity and stability. In DFAFC, the catalytic activity of metal Pd for the electrooxidation of formic acid is much better than that of metal Pt, because formic acid is oxidized mainly through the direct route on metal Pd, while on metal Pt, it is mainly oxidized through the CO route. However, the stability of Pd catalysts is not good enough, and the performance decreases significantly after long-term operation. The support material is a cr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92H01M8/1009
CPCH01M4/925H01M4/926H01M8/1009Y02E60/50
Inventor 曲微丽邓超高颖张靖佳
Owner HARBIN NORMAL UNIVERSITY
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