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燃料电池和金属空气电池受到了广泛的关注。在电池阴极即空气电极上发生的氧气还原反应很大程度上制约着整个电池的性能[1]。Pt基催化剂是氧还原的高效 催化剂,然而较高的成本制约了其在电池领域中的应用,因此有必要发展一种新型的成本较低,制备过程简单,催化性能好的催化剂。我们采用水热方法合成了一系 列银钼氧化物催化剂,对氧还原表现出较好的催化活性。通过旋转圆盘电极测试,发现在银钼催化剂上主要发生的是四电子转移反应。与Pt/C催化剂相比,银钼 催化剂在碱性电解质中表现出较好的稳定性。

一种新型非 Pt 催化剂.jpg

王瀛,刘宇,陆晓建,等. 一种新型非 Pt 催化剂在碱性介质中电催化氧还原的研究[C]. 第二十八届中国化学会年会第1分会场摘要集.2012,19.

The electroreduction of oxygen was firstly studied on Ag/Co3O4–C in alkaline media prepared by depositing Ag on Co3O4 modified carbon (Co3O4–C). The Ag/Co3O4–C composite not only displayed relatively large electrochemical active surface area (ESA), high catalytic activity towards oxygen reduction reaction (ORR), but also exhibited good methanol tolerance and stability in alkaline media. Ag/Co3O4–C could be a valuable catalyst for ORR and be applied to alkaline fuel cells and metal–air batteries.

Keywords: Silver; Cobalt oxide; Oxygen reduction reaction; Alkaline media

★★★★☆ Wang Y,Lu XJ,Liu Y,et al. Silver Supported On Co3o4 Modified Carbon As Electrocatalyst For Oxygen Reduction Reaction In Alkaline Media[J]. Electrochemistry Communications,2013,31:108-111.

The electroreduction of oxygen of MnOx-Co3O4/C was firstly studied in alkaline media. The MnOx-Co3O4/C showed better electrocatalytic activity towards ORR than MnOx/C and Co3O4/C. Compared to Pt/C, MnOx-Co3O4/C showed better methanol tolerance and durability in alkaline solution. Thus, the MnOx-Co3O4/C catalyst had potential for applications in metaleair batteries and alkaline fuel cells.

Keywords: Manganese oxides; Cobalt oxides; Oxygen reduction reaction; Alkaline media

★★★☆☆ Wang Y,Ma XY,Lu LJ,et al. Carbon Supported Mnox–co3o4 As Cathode Catalyst For Oxygen Reduction Reaction In Alkaline Media[J]. International Journal Of Hydrogen Energy,2013,38:13611-13616.