Development of highly active and durable Pt catalysts covered with silica

开发二氧化硅覆盖的高活性和耐用的铂催化剂

• 批准号: 20360365
• 负责人: TAKENAKA Sakae
• 金额: $ 12.23万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20360365/
• 关键词: 固体高分子形燃料電池; Ptカソード触媒; 耐久性; シリカ被覆; Pt-Co合金触媒; 炭素担持Pt触媒; 触媒失活; Ptナノ粒子; Pt触媒の耐久性; カソード触媒

Pt catalysts at cathode in polymer electrolyte fuel cells (PEFC) are deactivated due to the aggregation of Pt metal particles and the dissolution and subsequent deposition of Pt metal, because the Pt catalysts should work under very severe conditions such as low pH, highly positive potential and oxygen atmosphere. We covered carbon-supported Pt catalysts with silica layers a few nanometers thick in order to improve the durability of Pt metal under the cathode conditions. The Pt catalysts covered with silica showed high activity and excellent durability for the oxygen reduction reaction. In addition, the coverage with silica can be applied to the development of highly active and durable Pt-Co alloy catalysts.

聚合物电解质燃料电池（PEFC）阴极的Pt催化剂由于Pt金属颗粒的聚集以及Pt金属的溶解和随后的沉积而失活，因为Pt催化剂需要在非常恶劣的条件下工作，例如低pH值、高正电势和氧气气氛。我们在碳载铂催化剂上覆盖了几纳米厚的二氧化硅层，以提高铂金属在阴极条件下的耐久性。二氧化硅覆盖的铂催化剂对氧还原反应表现出高活性和优异的耐久性。此外，二氧化硅的覆盖可用于开发高活性和耐用的Pt-Co合金催化剂。

项目成果

Preparation of carbon nanotube-supported Pt catalysts covered with silicalayers ; application to cathode catalysts for PEFC

碳纳米管负载二氧化硅层 Pt 催化剂的制备；

• 发表时间: 2010
• 作者: S.Takenaka; et.al
• 通讯作者: et.al

Preparation of carbon nanotube-supported Pt metal particles covered with silica layers and their application to electrocatalysts for PEMFC

碳纳米管负载二氧化硅层铂金属颗粒的制备及其在质子交换膜燃料电池电催化剂中的应用

• 发表时间: 2009
• 作者: S.Takenaka; et.al.
• 通讯作者: et.al.

Preparation of Pt-Co alloy nanoparticles for oxygen reduction reaction ; Promotion of Pt-Co alloy formation by coverage with silica

用于氧还原反应的Pt-Co合金纳米粒子的制备；

• 发表时间: 2010
• 作者: S.Takenaka; A.Hirata; H.Matsune; M.Kishida
• 通讯作者: M.Kishida

Excellent Durability of Carbon-Supported Pt Cathode Catalysts Covered with Silica Layers

覆盖二氧化硅层的碳负载 Pt 阴极催化剂具有优异的耐久性

• 发表时间: 2009
• 作者: S.Takenaka; et.al.
• 通讯作者: et.al.

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