Metal oxide stabilized platinum-based ORR catalyst
    5.
    发明授权
    Metal oxide stabilized platinum-based ORR catalyst 有权
    金属氧化物稳定的铂基ORR催化剂

    公开(公告)号:US09468909B2

    公开(公告)日:2016-10-18

    申请号:US14316945

    申请日:2014-06-27

    摘要: In at least one embodiment, an oxygen reduction reaction catalyst (ORR) and a method for making the catalyst are provided. The method may include depositing a metal oxide on a graphitized carbon or graphene substrate. A platinum catalyst may then be deposited over the metal oxide to provide an ORR catalyst for use in, for example, a PEMFC. The metal oxide may be niobium oxide and may have an amorphous structure. The platinum catalyst may form a thin, electrically interconnected network structure overlaying the metal oxide. The ORR catalyst may be prepared by alternating the deposition of the metal oxide and the platinum catalyst, for example, using physical vapor deposition. The ORR catalyst may have a specific activity of at least 1,000 μA/cm2 Pt and may approach or achieve bulk Pt activity.

    摘要翻译: 在至少一个实施方案中,提供氧还原反应催化剂(ORR)和制备催化剂的方法。 该方法可以包括在石墨化碳或石墨烯衬底上沉积金属氧化物。 然后可以在金属氧化物上沉积铂催化剂以提供用于例如PEMFC的ORR催化剂。 金属氧化物可以是氧化铌,并且可以具有无定形结构。 铂催化剂可以形成覆盖金属氧化物的薄的,电互连的网络结构。 可以通过例如使用物理气相沉积交替沉积金属氧化物和铂催化剂来制备ORR催化剂。 ORR催化剂可以具有至少1,000μA/ cm 2 Pt的比活性,并且可以接近或实现体积Pt活性。