摘要
以L-抗坏血酸(VC)为还原剂通过微波辅助法在乙二醇(EG)体系中制备了不同原子比的碳载PtCu纳米催化剂,运用循环伏安法、计时电流法、X射线粉末衍射仪(XRD)、场发射扫描电子显微镜(FESEM)等方法和手段,对催化剂在酸性甲醇溶液中的电催化活性、稳定性、结构和形貌进行了研究。电化学测试结果表明,在pH=5时进行还原的Pt、Cu原子比为1∶1的PtCu/C催化剂活性最高,稳定性最好。表征后发现该催化剂粒径最小,比表面积最大,并且分布均匀,与测试结果一致,即对甲醇的氧化具有优异的电催化性能。在降低铂基催化剂成本和提高催化剂活性方面具有一定的价值。
Carbon supported PtCu nanocatalysts with different atomic ratios were synthesized by microwaveassisted method in ethylene glycol system(EG) using L-ascorbic acid(VC)as a reductant.The prepared catalysts were used to electrocatalysis methanol under acidic conditions.The electrocatalytic activity and stability were studied by cyclic voltammetry and chronoamperometry techniques.These catalysts were characterized by X-ray powder diffractometer and field emission scanning electron microscope.The electrochemical test results show that the catalyst reduced at pH=5 has the highest activity and the best stability when the atomic ratio of Pt∶Cu=1∶1.It was found that the catalyst has the smallest particle size, the largest specific surface area and a uniform distribution, which is consistent with the test results, indicating excellent electrocatalytic oxidation activity for methanol.It has wide value in reducing the cost and improving catalyst activity of platinum-based catalysts.
作者
赵洪波
白晓波
郎德龙
Zhao Hong-bo;Bai Xiao-bo;Lang De-ong(Heilongjiang Provincial Key Laboratory of Environmental Catalysis and Energy Storage Materials,Department of Food and Pharmaceutical Engineering,Suihua College,Heilongjiang Suihua 152061,China)
出处
《炭素技术》
CAS
北大核心
2024年第2期23-27,75,共6页
Carbon Techniques
基金
黑龙江省省属高等学校基本科研业务费基础研究项目(YWF10236220228)
绥化学院2021年科研启动基金项目(SQ21005)
黑龙江省自然科学基金项目(LH2020B016)
绥化学院第五批科研创新团队基金项目(SIT05001)。
关键词
燃料电池
乙二醇
VC
甲醇
电催化氧化
碳载PtCu催化剂
Fuel cell
ethylene glycol
L-ascorbic acid
methanol
electrocatalytic oxidation
carbon supported PtCu catalyst