采用微波-乙二醇方法还原氧化石墨烯和Pt(v)、Co(Ⅱ)粒子混合物,再经300℃H2还原,制备了石墨烯负载Pt-Co合金催化剂(Pt-Co/G).利用透射电镜、X-射线能谱、X-射线衍射和光电子能谱对所制催化剂进行表征.Pt-Co合金的粒径为3nm～8 nm,均匀地分散在石墨烯片上.与单金属的Pt/G和商品化的Pt/C催化剂相比,所制合金化的Pt-Co/G催化剂对氧还原反应展现出高的催化活性和可比拟的稳定性,显示了其在燃料电池中的应用潜力.
Electrocatalysts of graphene-supported Pt-Co alloy nanoparticles (Pt-Co/G) were prepared by a simultaneous reduction of mixtures of graphene oxide and Pt(Ⅳ),Co(Ⅱ) ions with ethylene glycol assisted by a microwave and further H2 treatment at 300 ℃.As-prepared Pt-Co/G catalysts were characterized by transmission electron microscopy,energy-dispersive X-ray spectrometry,X-ray diffraction,and X-ray photoelectron spectroscopy.The Pt-Co binary alloy nanoparticles with a size of 3-8 nm were homogeneously dispersed on the graphene.Compared with the monometallic Pt/ G and commercial Pt/C catalysts,the Pt-Co/G catalysts have a high stability and increased electrocatalytic activity that is conducive for the oxygen reduction reaction,suggesting their potential application in fuel cells.
参考文献
| [1] | Anusorn Kongkanand;Susumu Kuwabata;G.Girishkumar;Prashant Kamat .Single-Wall Carbon Nanotubes Supported Platinum Nanoparticles with Improved Electrocatalytic Activity for Oxygen Reduction Reaction[J].Langmuir: The ACS Journal of Surfaces and Colloids,2006(5):2392-2396. |
| [2] | Shuangyin Wang;San Ping Jiang;T. J. White .Electrocatalytic Activity and Interconnectivity of Pt Nanoparticles on Multiwalled Carbon Nanotubes for Fuel Cells[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2009(43):18935-18945. |
| [3] | Tsuji M;Kubokawa M;Yano R;Miyamae N;Tsuji T;Jun MS;Hong S;Lim S;Yoon SH;Mochida I .Fast preparation of PtRu catalysts supported on carbon nanofibers by the microwave-polyol method and their application to fuel cells[J].Langmuir: The ACS Journal of Surfaces and Colloids,2007(26):387-390. |
| [4] | J. Guo;G. San;Q. Wang .Carbon nanofibers supported Pt-Ru electrocatalysts for direct methanol fuel cells[J].Carbon: An International Journal Sponsored by the American Carbon Society,2006(1):152-157. |
| [5] | Brian Seger;Prashant V. Kamat .Electrocatalytically Active Graphene-Platinum Nanocomposites. Role of 2-D Carbon Support in PEM Fuel Cells[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2009(19):7990-7995. |
| [6] | Kou R;Shao Y Y;Wang D H et al.Enhanced activity and stability of Pt catalysts on functionalized grapheue sheets for electrocatalytic oxygen reduction[J].Electrochemistry Communications,2009,11(05):954-957. |
| [7] | Yoo, E;Okata, T;Akita, T;Kohyama, M;Nakamura, J;Honma, I .Enhanced Electrocatalytic Activity of Pt Subnanoclusters on Graphene Nanosheet Surface[J].Nano letters,2009(6):2255-2259. |
| [8] | Ramanathan T;Abdala AA;Stankovich S;Dikin DA;Herrera-Alonso M;Piner RD;Adamson DH;Schniepp HC;Chen X;Ruoff RS .Functionalized graphene sheets for polymer nanocomposites[J].Nature nanotechnology,2008(6):327-331. |
| [9] | Geim AK;Novoselov KS .The rise of graphene[J].Nature materials,2007(3):183-191. |
| [10] | Bolotin, KI;Sikes, KJ;Jiang, Z;Klima, M;Fudenberg, G;Hone, J;Kim, P;Stormer, HL .Ultrahigh electron mobility in suspended graphene[J].Solid State Communications,2008(9/10):351-355. |
| [11] | A.Peigney;Ch.Laurent;E.Flahaut;R.R.Bacsa;A.Rousset .Specific surface area of carbon nanotubes and bundles of carbon nanotubes[J].Carbon: An International Journal Sponsored by the American Carbon Society,2001(4):507-514. |
| [12] | Li D;Muller MB;Gilje S;Kaner RB;Wallace GG .Processable aqueous dispersions of graphene nanosheets[J].Nature nanotechnology,2008(2):101-105. |
| [13] | He H Y;Riedl T;Lerf A et al.Solid-state NMR studies of the structure of graphite oxide[J].Journal of Physical Chemistry,1996,100(51):19954-19958. |
| [14] | Park, S;Ruoff, RS .Chemical methods for the production of graphenes[J].Nature nanotechnology,2009(4):217-224. |
| [15] | Chao Xu;Xin Wang;Junwu Zhu .Graphene—Metal Particle Nanocomposites[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2008(50):19841-19845. |
| [16] | Yongjie Li;Wei Gao;Lijie Ci .Catalytic performance of Pt nanoparticles on reduced graphene oxide for methanol electro-oxidation[J].Carbon: An International Journal Sponsored by the American Carbon Society,2010(4):1124-1130. |
| [17] | Li XL;Zhang GY;Bai XD;Sun XM;Wang XR;Wang E;Dai HJ .Highly conducting graphene sheets and Langmuir-Blodgett films[J].Nature nanotechnology,2008(9):538-542. |
| [18] | Rao C V;Reddy A L M;Ishikawa Y et al.Synthesis and electrocatalytic oxygen reduction activity of graphene-supported Pt3-Co and Pt3Cr alloy nanoparticles[J].Carbon,2001,49(03):931-936. |
| [19] | Jianfeng Shen;Yizhe Hu;Chen Li;Chen Qin;Mingxin Ye .Pt-Co supported on single-walled carbon nanotubes as an anode catalyst for direct methanol fuel cells[J].Electrochimica Acta,2008(24):7276-7280. |
| [20] | Xu JB;Hua KK;Sun GZ;Wang C;Lv XY;Wang YJ .Electrooxidation of methanol on carbon nanotubes supported Pt-Fe alloy electrode[J].Electrochemistry communications,2006(6):982-986. |
| [21] | Jiang S J;Ma Y W;Jian G Q et al.Facile construction of binary Pt-Co/CNx nanotubes electrocatalysts and their application to oxygen reduction reaction[J].Advanced Materials,2009,21(48):4953-4956. |
| [22] | Cote, LJ;Kim, F;Huang, JX .Langmuir-Blodgett Assembly of Graphite Oxide Single Layers[J].Journal of the American Chemical Society,2009(3):1043-1049. |
| [23] | Liufeng Xiong;Arumugam Manthiram .Influence of atomic ordering on the electrocatalytic activity of Pt-Co alloys in alkaline electrolyte and proton exchange membrane fuel cells[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2004(9):1454-1460. |
| [24] | F. H. B. Lima;W. H. Lizcano-Valbuena;E. Teixeira-Neto;F. C. Nart;E. R. Gonzalez;E. A. Ticianelli .Pt-Co/C nanoparticles as electrocatalysts for oxygen reduction in H{sub}2SO{sub}4 and H{sub}2SO{sub}4/CH{sub}3OH electrolytes[J].Electrochimica Acta,2006(2):385-393. |
| [25] | Preparation, Structure, and Electrochemical Properties of Reduced Graphene Sheet Films[J].Advanced functional materials,2009(17):2782. |
| [26] | Geng HZ;Kim KK;Song C;Xuyen NT;Kim SM;Park KA;Lee DS;An KH;Lee YS;Chang Y .Doping and de-doping of carbon nanotube transparent conducting films by dispersant and chemical treatment[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2008(11):1261-1266. |
| [27] | O. Akhavan;E. Ghaderi .Photocatalytic Reduction of Graphene Oxide Nanosheets on TiO2 Thin Film for Photoinactivation of Bacteria in Solar Light Irradiation[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2009(47):20214-20220. |
| [28] | Robert V.Hull;Liang Li;Yangchuan Xing;Charles C.Chusuei .Pt Nanoparticle Binding on Functionalized Multiwalled Carbon Nanotubes[J].Chemistry of Materials: A Publication of the American Chemistry Society,2006(7):1780-1788. |
| [29] | Wakisaka M;Mitsui S;Hirose Y;Kawashima K;Uchida H;Watanabe M .Electronic structures of Pt-Co and Pt-Ru alloys for Co-tolerant anode catalysts in polymer electrolyte fuel cells studied by EC-XPS[J].The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical,2006(46):23489-23496. |
| [30] | Cuiling Gao;Yongye Liang;Min Han .Hierarchical Construction of Composite Hollow Structures of Co@CoO and Their Magnetic Behavior[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2008(25):9272-9277. |
| [31] | Duong HT;Rigsby MA;Zhou WP;Wieckowski A .Oxygen reduction catalysis of the Pt3Co alloy in alkaline and acidic media studied by x-ray photoelectron Spectroscopy and electrochemical methods[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2007(36):13460-13465. |
| [32] | Komameni S;Li D S;Newalkar B et al.Microwave-polyol process for Pt and Ag nanoparticles[J].Langmuir,2002,18(15):5959-5962. |
| [33] | Masaharu Tsuji;Takeshi Tsuji;Masayuki Hashimoto .Microwave-Assisted Synthesis of Metallic Nanostructures in Solution[J].Chemistry: A European journal,2005(2):441-452. |
| [34] | Nitrogen-doped Carbon Nanotube Arrays With High Electrocatalytic Activity For Oxygen Reduction[J].Science,2009(Feb.6 TN.5915):760. |
| [35] | Yu P;Pemberton M;Plasse P .Pt-Co/C cathode catalyst for improved durability in PEMFCs[J].Journal of Power Sources,2005,144(01):11-20. |
| [36] | Stamenkovic VR;Mun BS;Mayrhofer KJJ;Ross PN;Markovic NM .Effect of surface composition on electronic structure, stability, and electrocatalytic properties of Pt-transition metal alloys: Pt-skin versus Pt-skeleton surfaces - art. no. JA0600476[J].Journal of the American Chemical Society,2006(27):8813-8819. |
| [37] | Jiajia Wu;Yi Wang;Dun Zhang;Baorong Hou .Studies on the electrochemical reduction of oxygen catalyzed by reduced graphene sheets in neutral media[J].Journal of Power Sources,2011(3):1141-1144. |
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