水稻秸秆改性碳担载PdAu纳米催化剂对乙醇电氧化性能研究

Efficient ethanol electrooxidation on ultrafine PdAu nanoparticles supported on modified carbon derived from rice straw

直接乙醇燃料电池是一种具有替代化石燃料潜力的可再生能源,开发促进乙醇氧化的高性能电催化剂至关重要。通过高温烧结法和后处理法成功制备具有丰富孔结构的氮掺杂水稻秸秆衍生碳材料,并以其为载体,成功将平均粒径尺寸为2.2 nm的细小PdAu纳米颗粒分散于载体上。该材料作为在碱性介质中乙醇氧化反应的催化剂,电化学活性面积高达79.947 m^(2)·g^(-1),质量活性和比活性分别为6.281 A·mg^(-1)Pd和7.856 mA·cm^(-2),均高于相同条件下的商用Pd/C催化剂。本研究为绿色碳负载纳米金属催化剂的制备提供了一种新思路。

Direct ethanol fuel cell is a renewable energy source with the potential to replace fossil fuels,and it is very important to develop high-performance electrocatalysts to promote ethanol oxidation.In this work,nitrogen-doped rice straw-derived carbon materials with rich pore structure were successfully prepared by high-temperature sintering and post-treatment,and fine PdAu nanoparticles with an average particle size of 2.2 nm were successfully dispersed on the support.As a catalyst for ethanol oxidation in alkaline medium,the electrochemical activity area of this material is as high as 79.947 m 2·g^(-1),and its mass activity and specific activity are 6.281 A·mg^(-1)Pd and 7.856 mA·cm^(-2),respectively,which are higher than commercial Pd/C catalyst under the same conditions.The reported method of synthesizing support materials can represent a simple and low-cost method to carry ultra-small metal nanoparticles as an efficient catalyst and extend them to other catalytic reactions.