| 高活性、低载量的PtCo/C质子交换膜燃料电池催化剂的合成 |
| Synthesis of High-Performance and Low-Loading PtCo/C Proton Exchange Membrane Fuel Cell Catalysts |
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| 摘要: 利用逐步合成的方法，合成了一系列不同量硝酸处理的PtCo/C催化剂。通过燃料电池测试装置对催化剂进行了测试，结果表明PtCo/C催化剂在较低载量情况下，有着很好的性能：在50 kPa背压下，0.9 V下的电流密度达到44 mA·cm-2，0.8 V下的电流密度超过300 mA·cm-2；200 kPa背压下，最高功率密度超过1 300 mW·cm-2。通过X射线衍射（XRD）、透射电子显微镜（TEM）对合成的PtCo/C催化剂的形貌、组成进行了表征。XRD结果表明，催化剂中，Pt以Pt3Co和Pt颗粒形式存在。燃料电池测试结果表明，这一系列的催化剂中，经2 mL质量分数65%的浓硝酸配制的水溶液处理过的PtCo/C催化剂，具有最好的燃料电池性能以及良好的稳定性。 |
| 关键词: PtCo/C催化剂 质子交换膜燃料电池 氧还原反应 低Pt载量 |
| 基金项目: 国家重点研发计划（No.2017YFA0208300）和国家自然科学基金项目（No.21522107，21671180）资助。 |
| Abstract: A series of PtCo/C catalysts etched with different amounts of nitric acid were synthesized by stepwise synthesis. Tested by fuel cell test device, PtCo/C catalysts showed good performance at the condition of low loading. Under 50 kPa back pressure, the current density at 0.9 V reached 44 mA·cm-2 and the current density at 0.8 V exceeded 300 mA·cm-2. Under 200 kPa back pressure, the highest power density exceeded 1 300 mW·cm-2. The morphology and structure of PtCo/C catalysts were characterized by X-ray diffraction (XRD) and transmission electron microscope (TEM). XRD patterns show that Pt mainly exists in the form of Pt3Co and Pt nanoparticles. The fuel cell test data show that among the series of catalysts, PtCo/C catalysts treated with aqueous solution prepared with 2 mL nitric acid (mass ratio of 65%) has the best fuel cell performance. |
| Keywords: PtCo/C catalysts proton exchange membrane fuel cell oxygen reduction reaction low Pt-loading |
| 投稿时间：2021-03-01 修订日期：2021-06-25 |
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| 赵叙言,吴宇恩.高活性、低载量的PtCo/C质子交换膜燃料电池催化剂的合成[J].无机化学学报,2021,37(8):1457-1464. |
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