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Oxide-based stable high-potential carrier for solid polymer fuel cell

An oxide and carrier technology, which is applied in the field of high-potential stable oxide carriers for polymer electrolyte fuel cells, can solve the problems of chain or dendritic forms of catalyst carriers that are not described.

Active Publication Date: 2012-08-15
UNIVERSITY OF YAMANASHI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, each of these patent documents mentions the use of spherical catalyst supports, and neither describes or suggests that the catalyst supports have a chain or dendritic form

Method used

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  • Oxide-based stable high-potential carrier for solid polymer fuel cell
  • Oxide-based stable high-potential carrier for solid polymer fuel cell
  • Oxide-based stable high-potential carrier for solid polymer fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] (in Sn 0.96 Sb 0.04 o 2-δ Catalyst loaded with 20wt% platinum catalyst)

[0083] First, in this example, using figure 2 The synthetic equipment used for the flame method is shown. Oxygen, air and propane flow from the image 3 The gas introduction parts 31 and 32 of the illustrated nozzle are introduced and mixed by a gas mixer 33 . The mixed gas is introduced into the stainless steel pipe 34 and passed through the burner 40 to form a chemical flame.

[0084] At the same time, a solution obtained by dissolving tin octoate and antimony octoate in mineral turpentine at a molar ratio of 0.96:0.04 is introduced into the solution introduction part 35 at 1 to 10 g per minute, and the air introduced in the carrier gas introduction part 36 , passing through mixer 37 and stainless steel pipe 38.

[0085] In addition, the solution is formed as a mist via a fluid nozzle, a gas nozzle and a retainer cap 39 and introduced into the chemical flame through a burner 40 . The te...

Embodiment 2

[0098] (SnO 2-δ carrier)

[0099] Also in this example, using figure 2The synthetic equipment used for the flame method is shown. The oxygen, air and propane flow rates for synthesis and formation of the chemical flame were the same as in Example 1. A solution obtained by dissolving tin octoate in mineral turpentine was misted and introduced into a chemical flame by the same method as in Example 1. The temperature of the chemical flame is raised to about 1600°C by the heat of combustion of propane and mineral turpentine, and in this chemical flame SnO is formed 2-δ powder.

[0100] The formed powder is collected by collection filter 27 ( figure 2 ), and the amount of powder collected in 20 minutes of operation was 7 g. Evaluation of SnO by XRD 2-δ powder (see Figure 11 ), and the shape was observed by scanning transmission electron microscopy (STEM) (see Figure 12 ).

[0101] 0.5g of SnO 2-δ The powder is filled into a steel container with a rectangular hole of ...

Embodiment 3

[0103] (Ti 0.95 Nb 0.05 o 2-δ carrier)

[0104] Also in this example, using figure 2 The synthetic equipment used for the flame method is shown. The flow rate of oxygen, air and propane during synthesis and formation of chemical flame is the same as in Example 1. A solution obtained by dissolving titanium octoate and niobium octoate in mineral turpentine was misted by the same method as in Example 1 and introduced into a chemical flame. By the heat of combustion of propane and mineral turpentine, the temperature of the chemical flame is raised to about 1600°C, and in this chemical flame Ti is formed 0.95 Nb 0.05 o 2-δ powder.

[0105] The formed powder is collected by collection filter 27 ( figure 2 ), and the amount of powder collected in 20 minutes of operation was 7.5 g. Evaluation of Ti by XRD 0.95 Nb 0.05 o 2-δ powder (see Figure 13 ), and the shape was observed by scanning transmission electron microscopy (STEM) (see Figure 14 ). Production Ti 0.95 N...

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Abstract

Disclosed is an oxide- and / or nitride-based carrier for an electrode catalyst, which is used for an electrode of a solid polymer fuel cell (PEFC). The carrier for an electrode catalyst is characterized by being composed of a fused body of primary particles of oxides of one or more metals selected from among rare earth elements, alkaline earth elements, transition metals, niobium, bismuth, tin, antimony, zirconium, molybdenum, indium, tantalum and tungsten. The carrier for an electrode catalyst is also characterized in that at least 80% of the primary particles of metal oxides having a size of 5-100 nm are fused and bonded together, thereby forming chain-like or tufted structures each of which is composed of 5 or more of the primary particles.

Description

technical field [0001] The present invention relates to the composition and structure of oxide and / or nitride particulate supports for use in electrodes for polymer electrolyte fuel cells (PEFCs), and to electrodes. Background technique [0002] Traditionally, as an electrode catalyst for a fuel cell, a support in which noble metal particles are supported on a surface area of ​​100 m 2 / g above carbon particles. In particular, carbon particles having high conductivity are effectively used as supports for catalysts used in fuel cell electrodes. For example, powders in which platinum particles or noble metal alloy particles such as platinum and ruthenium or platinum and iron are supported on carbon particles are known in Patent Documents 1 and 2 as highly effective electrode catalysts for polymer electrolyte fuel cells. These patent documents describe that electrodes for polymer electrolyte fuel cells can be produced in such a manner that platinum or an alloy formed of plati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86B01J23/644B01J35/10B01J37/08H01M8/10
CPCB01J23/002B01J23/10B01J23/14B01J23/18H01M4/86H01M2008/1095Y02E60/50B01J23/644B01J37/08H01M4/8647H01M4/9066H01M4/9091H01M8/0215H01M8/0241B01J35/60
Inventor 渡边政广柿沼克良内田诚上野武夫内田裕之
Owner UNIVERSITY OF YAMANASHI
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