采用脉冲微波辅助化学还原法制备了质子交换膜燃料电池(PEMFC)用Pt/C催化剂.通过X射线衍射(XRD)和高分辨透射电镜(HRTEM)等分析技术对催化剂的微观结构和形貌进行了表征.利用循环伏安(CV)法计算了催化剂的电化学比表面积.在此基础上制备了膜电极(MEA)并组装成单电池,考察了制备的Pt/C催化剂作为单电池阴极催化剂材料的电催化性能.微波功率和微波作用时间对Pt颗粒直径和分散有重要影响.XRD和HRTEM结果表明,在微波功率为2kW微波作用12 s,豫驰180s,且重复6次的条件下,制得的催化剂中铂纳米粒子颗粒直径小,分散均一,其平均粒径为1.9nm.CV结果表明,该条件下制得的催化剂电化学比表面积达到72.3m2/g,且该催化剂对应的单电池最高功率密度为0.572W/cm2.
Pt/C catalysts for polymer electrolyte membrane fuel cells were synthesized by pulse-microwave assisted chemical reduction.X-ray diffraction (XRD) and high resolution transmission electron microscope (HRTEM) were used to investigate the microstructure and morphology of the as-prepared catalysts. The electrochemical surface area (ESA) was studied by cyclic voltammetry (CV). Membrane electrode assemblies were fabricated and the as-prepared catalysts were evaluated. The particle size and distribution of Pt nanoparticles on the carbon support greatly depended on the microwave power and irradiation time. XRD and HRTEM showed that the Pt/C catalysts possessed the smallest mean Pt particle size (1.9 nm) and the most uniform distribution among all the synthesized catalysts when the microwave was on for 12 s and off for 180 s, and this was repeated 6 times at a microwave power of 2 kW. A CV revealed that the ESA of the catalyst was 72.3m2/g and the corresponding maximum power density was 0.572 W/cm2.
参考文献
| [1] | Thomas C E .[J].International Journal of Hydrogen Energy,2009,34:6005. |
| [2] | Jia Y Q;Wang H W;Ouyang M G .[J].Journal of Power Sources,2006,155:319. |
| [3] | 徐洪峰,林治银,邱艳玲,唐倩.用于质子交换膜燃料电池的碳载铂电催化剂[J].催化学报,2003(02):143-148. |
| [4] | Dyer C K .[J].Journal of Power Sources,2002,106:31. |
| [5] | Spinace E V;Neto A O;Linardi M .[J].Journal of Power Sources,2003,124:426. |
| [6] | Watanabe M;Uchida M;Motoo S .[J].Journal of Electroanalytical Chemistry,1987,229:395. |
| [7] | Aguilar C;García R;Soto-Garrido G;Arriagada R .[J].Applied Catalysis B:Environmental,2003,46:229. |
| [8] | Zhou W J;Song S Q;Li W Z;Sun G Q Xin Q Kontou S Poulianitis K Tsiakaras P .[J].Solid-State Ionicis,2004,175:797. |
| [9] | Chen WX;Zhao J;Lee JY;Liu ZL .Microwave heated polyol synthesis of carbon nanotubes supported Pt nanoparticles for methanol electrooxidation[J].Materials Chemistry and Physics,2005(1):124-129. |
| [10] | Boxali D L;Deluga G A;Kenik E A;King W D Lukehart C M .[J].Chemistry of Materials,2001,13:891. |
| [11] | 王喜照,郑俊生,符蓉,马建新.脉冲微波辅助化学还原合成Pt/C催化剂及其电催化氧还原性能[J].物理化学学报,2011(01):85-90. |
| [12] | Liu Z L;Lee J Y;Chen W X;Hah M Gan L M .[J].Langmuir,2004,20:181. |
| [13] | Wang X;Hsing I M .[J].Electrochimica Acta,2002,47:2981. |
| [14] | 田植群,简弃非,谢方艳,沈培康.快速制备高负载量高分散Pt/C催化剂的研究[J].功能材料,2004(02):197-199. |
| [15] | Chen W X;Lee J Y;Liu Z L.[J].Chemical Communications,2002:2588. |
| [16] | Sakthivel M;Schlange A;Kunz U;Turek T .[J].Journal of Power Sources,2010,195:7083. |
| [17] | Ahmadi T S;Wang Z L;Green T C;Henglein A EISayed M A .[J].Science,1996,272:1924. |
| [18] | Zhao J;Chen WX;Zheng YF;Li X;Xu ZD .Microwave polyol synthesis of Pt/C catalysts with size-controlled Pt particles for methanol electrocatalytic oxidation[J].Journal of Materials Science,2006(17):5514-5518. |
| [19] | Shen P K;Tian Z C .[J].Electrochimica Acta,2004,49:3107. |
| [20] | Song S;Wang Y;Shen P K .[J].Journal of Power Sources,2007,170:46. |
| [21] | Chu Y Y;Wang Z B;Gu D M;Yin G P .[J].Journal of Power Sources,2010,195:1799. |
| [22] | Lebegue E;Baranton S;Coutanceau C .[J].Journal of Power Sources,2011,196:920. |
| [23] | Anderson M L;Stroud R M;Rolison D R .[J].Nano Letters,2002,2:235. |
| [24] | Drillet J F;Ee A;Friedemann J;K(o)tz R Schnyder B Schmidt V M .[J].Electrochimica Acta,2002,47:1983. |
| [25] | Radmilovic V.;Ross PN.;Gasteiger HA. .STRUCTURE AND CHEMICAL COMPOSITION OF A SUPPORTED PT-RU ELECTROCATALYST FOR METHANOL OXIDATION[J].Journal of Catalysis,1995(1):98-106. |
| [26] | Liu H S;Song C J;Zhang L;Zhang J J Wang H J Wilkinson D P .[J].Journal of Power Sources,2006,155:95. |
| [27] | Bergamaski K;Pinheiro A L N;Teixeira-Neto E .[J].Journal of Physical Chemistry B,2006,110:19271. |
| [28] | Li X;Chen W X;Zhao J;Xing W Xu Z D .[J].CARBO,2005,43:2168. |
| [29] | Frelink T.;Vanveen JAR.;Visscher W. .PARTICLE SIZE EFFECT OF CARBON-SUPPORTED PLATINUM CATALYSTS FOR THE ELECTROOXIDATION OF METHANOL[J].Journal of Electroanalytical Chemistry: An International Journal Devoted to All Aspects of Electrode Kinetics, Interfacial Structure, Properties of Electrolytes, Colloid and Biological Electrochemistry,1995(1/2):65-72. |
| [30] | Mukerjee S;McBreen J .[J].Journal of Electroanalytical Chemistry,1998,448:163. |
| [31] | Perez J;Gonzalez E R;Ticianelli E A .[J].Electrochimica Acta,1998,44:1329. |
| [32] | Liu ZL.;Lee JY.;Han M.;Chen WX.;Gan LM. .Synthesis and characterization of PtRu/C catalysts from microemulsions and emulsions[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2002(8):2453-2458. |
| [33] | Coutanceau C;Croissant M J;Napporn T;Lamy C .[J].Electrochimica Acta,2000,46:579. |
| [34] | Grolleau C;Coutanceau C;Pierre F;Leger J M .[J].Electrochimica Acta,2008,53:7157. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%