采用直接气相还原法制备了金属铱催化剂.通过X射线衍射(XRD)分析了金属铱的物相组成,采用循环伏安(CV)和线性电势扫描(LSV)等电化学手段评价了金属铱的电化学性能.XRD分析结果表明在氨气气氛中,氧化铱经400℃还原3h能完全转化为金属铱单质.CV和LSV结果表明金属铱具有良好的氧还原电催化活性,且其氧还原起始电压可以达到0.51 V(vs.SCE).从原子状态角度考虑,金属铱的d带空穴多于金属铂,最终导致金属铱的氧还原电催化活性低于金属铂,但金属铱具有与金属铂相似的氧还原电催化路径.
参考文献
| [1] | Perez, J;Paganin, VA;Antolini, E .Particle size effect for ethanol electro-oxidation on Pt/C catalysts in half-cell and in a single direct ethanol fuel cell[J].Journal of Electroanalytical Chemistry: An International Journal Devoted to All Aspects of Electrode Kinetics, Interfacial Structure, Properties of Electrolytes, Colloid and Biological Electrochemistry,2011(1/2):108-115. |
| [2] | Perez-Alonso F J;Elkjaer C F;Shim S S et al.[J].Journal of Power Sources,2011,196(15):6085. |
| [3] | Song S Q;Liu J C;Shi J Y et al.[J].Applied Catalysis B:Environmental,2011,103(3-4):287. |
| [4] | Wang X Z;Zheng J S;Fu R et al.[J].Journal of Catalysis,2011,32(04):599. |
| [5] | Relevance of the synthesis route of Se-modified Ru/C as methanol tolerant electrocatalysts for the oxygen reduction reaction[J].Journal of Power Sources,2010(9):2478. |
| [6] | Loponov K N;Kriventsov V V;Nagabhushana K S et al.[J].Catalysis Today,2009,147(3-4):260. |
| [7] | Nagabhushana K S;Dinjus E;Boennemann H et al.[J].Journal of Applied Electrochemistry,2007,37(12):1515. |
| [8] | Tang Y F;Zhang H M;Zhong H X et al.[J].International Journal of Hydrogen Energy,2011,36(01):725. |
| [9] | Cao D X;Wieckowski A;Inukai J et al.[J].Journal of the Electrochemical Society,2006,153(05):A869. |
| [10] | Halttunen M E;Niemela M K;Krause A O I et al.[J].Applied Catalysis A:General,2001,205(1-2):37. |
| [11] | Wei Y C;Liu C W;Lee H W et al.[J].International Journal of Hydrogen Energy,2011,36(06):3789. |
| [12] | Loukrakpam R;Wanjala B N;Yin J et al.[J].ACS Catal,2011,1(05):562. |
| [13] | Lee M;Uchida M;Tryk D A et al.[J].Electrochimica Acta,2011,56(13):4783. |
| [14] | Chen D J;Hofstead-Duffy A M;Park I S et al.[J].JPhys Chem C,2011,115(17):8735. |
| [15] | Tarasevich M R;Novikov D V;Zhutaeva G V et al.[J].Pro Met Phys Chem Surf,2009,45(07):782. |
| [16] | 黄成德,韩佐青,李晓婷,陈延禧.PEMFC用Pt/C电催化剂的制备[J].电源技术,2000(04):243-245. |
| [17] | Alerasool S;Gonzalez R D .[J].Journal of Catalysis,1990,124:204. |
| [18] | 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. |
| [19] | Nanba T;Wada K;Masukawa S et al.[J].Applied Catalysis A:General,2010,380:66. |
| [20] | Boggs B K;Botte G G .[J].Electrochimica Acta,2010,55:5287. |
| [21] | Zheng J S;Wang X Z;Qiao J L et al.[J].Electrochemistry Communications,2010,12:27. |
| [22] | Qiao J;Lin R;Li B et al.[J].JElectrochim Acta,2010,55:8490. |
| [23] | 刘春艳,徐斌,唐亚文,曹高萍,杨裕生,陆天虹.大孔碳载Ir催化剂对氧还原的电催化性能和抗甲酸能力[J].高等学校化学学报,2011(01):134-138. |
| [24] | Chichagov A V;Belonozhko A B;Lopatin A L et al.[J].Kristallografiya,1990,35(03):610. |
| [25] | 骆军,朱航天,梁敬魁.晶粒尺寸和应变的X射线粉末衍射法测定[J].物理,2009(04):267-275. |
| [26] | Kim J Y;Oh T K;Shin Y et al.[J].International Journal of Hydrogen Energy,2011,36(07):4557. |
| [27] | Takasu Y;Yoshinaga N;Sugimoto W .Oxygen reduction behavior of RuO2/Ti, IrO2/Ti and IrM (M : Ru, Mo, W, V) O-x/Ti binary oxide electrodes in a sulfuric acid solution[J].Electrochemistry communications,2008(4):668-672. |
| [28] | 张敏,李经建,潘牧,徐东升.Pt纳米线阵列的氧还原催化性能[J].物理化学学报,2011(07):1685-1688. |
| [29] | 彭红建,谢佑卿,聂跃庄.电催化剂Pt的电子结构和催化性能[J].中南大学学报（自然科学版）,2007(01):98-101. |
| [30] | 彭红建,谢佑卿.贵金属Ir的原子状态与物理性质[J].中南大学学报（自然科学版）,2006(05):937-941. |
| [31] | Hoare J P .[J].J Electroanal Chem Inter Electrochem,1968,18(03):251. |
| [32] | Gattrell M;MacDougall B.[A].London:Willey,2003:443. |
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