分别以大孔炭(MC)和Vulcan XC-72炭黑(XC)为载体,制备了Ir/MC和Ir/XC催化剂.在用X射线能量色散谱(EDS)、X射线衍射(XRD)谱、拉曼光谱对催化剂表征的基础上,用电化学技术研究了2种炭载Ir催化剂对氨氧化的电催化性能,发现氨在Ir/MC催化剂电极上,氧化峰峰电流密度比在Ir/XC催化剂电极上大38.7％左右,而且电催化稳定性明显好于Ir/XC催化剂.由于Ir/MC和Ir/XC催化剂的Ir粒子平均粒径和相对结晶度相似,因此,这只能归结于MC有大的孔径和孔率及高的石墨化程度引起的高电导率.所以MC是一种比XC更好的催化剂的炭载体.
参考文献
| [1] | Timmer B,Olthuis W,van den Berg A.Ammonia Sensors and Their Applications-A Review[J].Sens Actuat B,2005,107:666-677.Carbon,2006,44:152-157. |
| [2] | Timmer B,Olthuis W,van den Berg A.Ammonia Sensors and Their Applications-A Review[J].Sens Actuat B,2005,107:666-677.Carbon,2006,44:152-157. |
| [3] | Hayashi A,Notsu H,Kimijima K,et al.Preparation of Pt/Mesoporous Carbon(MC) Electrode Catalyst and Its Reactivity Toward Oxygen Reduction[J].Electrochem Acta,2008,53:6117-6125. |
| [4] | Liu Y C,Qiu X P,Huang Y Q,et al.Electrocatalytic Performance and Formic Acid Tolerance Ability of Macropore Carbon Supported Ir Catalyst for Oxygen Reduction[J].J Power Sources,2002,111:160-164. |
| [5] | Park I S,Park K W,Choi J H,et al.Electrocatalytic Enhancement of Methanol Oxidation by Graphite Nanofibers with a High Loading of PtRu Alloy Nanoparticles[J].Carbon,2007,45:28-33. |
| [6] | Zhao C R,Wang W K,Yu Z B,et al.Nano-CaCO3 as Template for Preparation of Disordered Large Mesoporous Carbon with Hierarchical Porosities[J].J Mater Chem,2010,20:976-980. |
| [7] | Wang Z B,Zhao C R,Shi P F,et al.Effect of a Carbon Support Containing Large Mesopores on the Performance of a Pt-Ru-Ni/C Catalyst for Direct Methanol Fuel Cells[J].J Phys Chem C,2010,114:672-677. |
| [8] | Tang Y W,Zhang L L,Wang Y A,et al.Preparation of A Carbon Supported Pt Catalyst Using An Improved Organic Sol Method and Its Electrocatalytic Activity for Methanol Oxidation[J].J Power Sources,2006,162:124-131. |
| [9] | Han S,Yun Y,Park K W,et al.Simple Solid-Phase Synthesis of Hollow Graphitic Nanoparticles and Their Application to Direct Methanol Fuel Cell Electrodes[J].Adv Mater,2003,15:1922-1925. |
| [10] | Guo J L,She Y N,Jie M L,et al.Using Scherrer Formular Calculating Size of Crystalline Should Pay Attention to Several Questions[J].J Inner Mongolia Normal Univ,2009,38(3):357-358. |
| [11] | White J H,Sammells A,Perovskite F.Perovskite Anode Electrocatalysis for Direct Methanol Fuel Cells[J].J Electrochem Soc,1993,140:2167-2177. |
| [12] | Antolini E,Cardellini F J.Formation of Carbon Supported PtRu Alloys:an XRD Analysis[J].J Alloys Compd,2001,315:118-122. |
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