用低温合成法制备出不同Pt掺杂量的Pt-W-Ru-Se催化剂,应用旋转圆盘电极电位扫描法测试其对氧还原反应的催化作用,采用XRD、EDS、XPS技术表征结构及表面组成.结果表明,Pt能够显著增强W-Ru-Se对氧还原反应的催化活性,尤其以含5%Pt(质量分数, 下同)的Pt-W-Ru-Se催化剂最为明显,在0.5 mol·L~(-1) H_2SO_4中其对氧还原反应的电催化活性超过了W-Ru-Se和Pt;甲醇存在时,其稳定性和抗甲醇性也都超过了Pt.
Pt-W-Ru-Se catalysts with different Pt contents were fabricated by low-temperature synthesis and their catalysis effect on the oxygen reduction reaction was tested by the rotating-disk-electrode potential sweep method. The microstructure and surface composition of the obtained catalysts were characterized by XRD, EDS and XPS. Results show that Pt can greatly enhance the catalysis activity of W-Ru-Se to oxygen reduction. In particular, Pt-W-Ru-Se with 5% Pt (mass fraction, similarly hereinafter) is the most obvious one, whose catalysis activity to oxygen reduction is superior to that of W-Ru-Se and Pt in 0.5 mol·L~(-1) H_2SO_4. Its stability and resistance-methanol is better than that of Pt when there is methanol.
参考文献
| [1] | Malakhov I V;Nikitenko S G;Savinova E R .[J].Journal of Physical Chemistry B,2002,106:1670. |
| [2] | Shukla A K;Neergat M;Parthasarathi Bera .[J].Journal of Electroanalytical Chemistry,2001,504:111. |
| [3] | Bron M;Bogdanoff P;Fiechter S .[J].Journal of Electroanalytical Chemistry,2001,517:85. |
| [4] | 吴越.催化化学[M].北京:科学出版社,1998:771. |
| [5] | Yang H;Coutanceau C;Leger JM;Alonso-Vante N;Lamy C .Methanol tolerant oxygen reduction on carbon-supported Pt-Ni alloy nanoparticles[J].Journal of Electroanalytical Chemistry: An International Journal Devoted to All Aspects of Electrode Kinetics, Interfacial Structure, Properties of Electrolytes, Colloid and Biological Electrochemistry,2005(2):305-313. |
| [6] | Solorza-Feria O;Ellmer K;Giersig M .[J].Electrochimica Acta,1994,39:1647. |
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