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Catalyst And Forming Method Thereof

A catalyst and atomic technology, applied in the application field of the catalyst in fuel cells, can solve the problem of high Mo content

Active Publication Date: 2012-07-11
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is the two-step manufacturing method, and the content of Mo is relatively high

Method used

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  • Catalyst And Forming Method Thereof
  • Catalyst And Forming Method Thereof
  • Catalyst And Forming Method Thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The alloy catalyst PdCoMo was synthesized according to the catalyst sample synthesis method. The atomic ratio of Pd, Co and Mo is 92.59:6.97:0.44, and the weight ratio of the alloy catalyst to the carbon carrier is 64:36. The catalyst has an activity of 68A / g in 0.5M sulfuric acid aqueous solution and a voltage of 0.75V, and an activity of 46A / g in a 0.5M sulfuric acid aqueous solution and a voltage of 0.8V. The catalyst had an activity of 47A / g at 1M aqueous methanol and a voltage of 0.75V, and an activity of 27A / g at 1M aqueous methanol and a voltage of 0.8V. The catalyst had an activity of 38 A / g after 3 hours in 0.5 M aqueous sulfuric acid and 17 A / g after 3 hours in 1 M methanol.

Embodiment 2

[0036] A PdCoMo alloy catalyst with an atomic ratio of Pd, Co and Mo of 95.11:4.86:0.03 was synthesized, and the weight ratio of the alloy catalyst to the carbon support was 64:36. The catalyst has an activity of 63A / g in 0.5M sulfuric acid aqueous solution and a voltage of 0.75V, and an activity of 40A / g in a 0.5M sulfuric acid aqueous solution and a voltage of 0.8V. The catalyst had an activity of 45A / g at 1M aqueous methanol and a voltage of 0.75V, and an activity of 33A / g at 1M aqueous methanol and a voltage of 0.8V. The catalyst had an activity of 28 A / g after 3 hours in 0.5 M aqueous sulfuric acid and 26 A / g after 3 hours in 1 M methanol.

Embodiment 3

[0038] A PdCoMo alloy catalyst with an atomic ratio of Pd, Co and Mo of 91.73:5.58:2.69 was synthesized, and the weight ratio of the alloy catalyst to the carbon support was 62:38. The catalyst has an activity of 60A / g in 0.5M sulfuric acid aqueous solution and a voltage of 0.75V, and an activity of 37A / g in a 0.5M sulfuric acid aqueous solution and a voltage of 0.8V. The catalyst had an activity of 21 A / g after 3 hours in 0.5 M aqueous sulfuric acid and 14 A / g after 3 hours in 1 M methanol.

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PUM

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Abstract

The present invention relates to a catalyst and a forming method thereof. The catalyst according to the invention comprises an alloy catalyst which absorbs on a carbon carrier. The alloy catalyst is composed of the following components: 50atom%-98atom% of palladium, 2atom%-30atom% of cobalt, and 0.01atom%-less than 5atom% of molybdenum. If the proportion of the molybdenum of the alloy catalyst is larger than or equal with 5atom%, activity and durability of the alloy catalyst are reduced.

Description

technical field [0001] The invention relates to a catalyst, more particularly to the composition ratio and formation method of the catalyst, and the application of the catalyst in fuel cells. Background technique [0002] Direct Methanol Fuel Cell (DMFC) is a power supply device that directly uses fuel to operate at low temperature. Because it operates at low temperature, it must use a catalyst to achieve ideal power generation efficiency. Since proton exchange membrane fuel cells (PEMFC) mainly use hydrogen as a fuel source, pure hydrogen has its own difficulties in transportation and storage, so reformers are mostly used to convert methanol or other hydrocarbon fuels into required fuel gases, and These fuel gases often contain carbon monoxide (CO) or carbon dioxide (CO 2 ) and other impurities, so the direct methanol fuel cell (DMFC) of simple direct reaction has been paid attention to. The current development is mainly divided into active and passive. The output power o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89H01M4/92
CPCY02E60/50
Inventor 陈盈洁张美元陈彦至卢敏彦
Owner IND TECH RES INST