Emerging methanol-tolerant AlN nanowire oxygen reduction electrocatalyst for alkaline direct methanol fuel cell.
Emerging methanol-tolerant AlN nanowire oxygen reduction electrocatalyst for alkaline direct methanol fuel cell.
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用于碱性直接甲醇燃料电池的新兴耐甲醇AlN纳米线氧还原电催化剂
DOI:
10.1038/srep06013
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发表时间:
2014-08-11
影响因子:
4.6
通讯作者:
Wang WJ
中科院分区:
文献类型:
--
作者:
Lei M;Wang J;Li JR;Wang YG;Tang HL;Wang WJ
Replacing precious and nondurable Pt catalysts with cheap materials is a key issue for commercialization of fuel cells. In the case of oxygen reduction reaction (ORR) catalysts for direct methanol fuel cell (DMFC), the methanol tolerance is also an important concern. Here, we develop AlN nanowires with diameters of about 100–150 nm and the length up to 1 mm through crystal growth method. We find it is electrochemically stable in methanol-contained alkaline electrolyte. This novel material exhibits pronounced electrocatalytic activity with exchange current density of about 6.52 × 10−8A/cm2. The single cell assembled with AlN nanowire cathodic electrode achieves a power density of 18.9 mW cm−2. After being maintained at 100 mA cm−2for 48 h, the AlN nanowire-based single cell keeps 92.1% of the initial performance, which is in comparison with 54.5% for that assembled with Pt/C cathode. This discovery reveals a new type of metal nitride ORR catalyst that can be cheaply produced from crystal growth method.
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