研究了钛电极上负载Ni-P和Ni在碱性介质中的甲醇氧化催化性能.结果表明,在Ni电极中掺杂P原子能够显著提高Ni电极电催化氧化甲醇的性能,主要表现在提高甲醇氧化反应电流和降低甲醇氧化反应的起始电位.氢与Ni-P之间的结合能较弱,使得吸附在Ni-P电极表面的氢原子能够快速容易的去除,提供更多的清洁表面来吸附甲醇分子以及形成甲醇氧化中间物CO的主要氧化剂H2Oa.研究还发现,Ni-P电极上甲醇氧化的起始电位与Ni (OH) 2/NiOOH的氧化电位一致,而在Ni电极上甲醇氧化的起始电位比Ni (OH) 2/NiOOH的电位更高,其主要是由于H原子与Ni之间的结合能比Ni-P更强.另外,P的存在能够显著降低Ni-P的晶粒尺寸、增加比表面积,从而有利于提高甲醇氧化反应电流.
参考文献
| [1] | Wang, L.;Nemoto, Y.;Yamauchi, Y. .Direct synthesis of spatially-controlled Pt-on-Pd bimetallic nanodendrites with superior electrocatalytic Activity[J].Journal of the American Chemical Society,2011(25):9674-9677. |
| [2] | Arne Kloke;Felix von Stetten;Roland Zengerle;Sven Kerzenmacher .Strategies for the Fabrication of Porous Platinum Electrodes[J].Advanced Materials,2011(43):4976-5008. |
| [3] | Zhi-You Zhou;Zhi-Zhong Huang;De-Jun Chen .High-Index Faceted Platinum Nanocrystals Supported on Carbon Black as Highly Efficient Catalysts for Ethanol Electrooxidation[J].Angewandte Chemie,2010(2):411-414. |
| [4] | Shobba T;Mayanna S M;Sequeira C A C .Preparation and characterization of Co-W alloys as anode materials for methanol fuel cells[J].J PowerSource,2002,108:261-264. |
| [5] | Faycal Ksar;Geetarani Surendran;Laurence Ramos .Palladium Nanowires Synthesized in Hexagonal Mesophases: Application in Ethanol Electrooxidation[J].Chemistry of Materials: A Publication of the American Chemistry Society,2009(8):1612-1617. |
| [6] | Lewis D J;Jackson M R;Hardwicke C U et al.Alloy for an interconnect for a fuel cell e.g.solid oxide fuel cells comprises iron ; chromium; tungsten; and other element (s),in specific amounts[P].U S,2007087250-A1,2007-04-19. |
| [7] | Rosenzweig L S;Soloveichik G L;Zappi G D .Porous nickel coating formation used as electrodes in fuel cell by depositing coating onto substrate by melting and atomizing electrode wires of composition including nickel and zinc in wire-arc spray device[P].US,2007278108-A1,2007-12-06. |
| [8] | E. Antolini;T. Lopes;E.R. Gonzalez .An overview of platinum-based catalysts as methanol-resistant oxygen reduction materials for direct methanol fuel cells[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2008(1/2):253-262. |
| [9] | T. Iwasita .Electrocatalysis of methanol oxidation[J].Electrochimica Acta,2002(22/23):3663-3674. |
| [10] | Liu F;Yan QF;Zhou WJ;Zhao XS;Lee JY .High regularity porous oxophilic metal films on Pt as model bifunctional catalysts for methanol oxidation[J].Chemistry of Materials: A Publication of the American Chemistry Society,2006(18):4328-4335. |
| [11] | Vidakovic T;Christov M;Sundmacher K .Rate expression for electrochemical oxidation of methanol on a direct methanol fuel cell anode[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(1):105-121. |
| [12] | Wei ZD;Yan AZ;Feng YC;Li L;Sun CX;Shao ZG;Shen PK .Study of hydrogen evolution reaction on Ni-P amorphous alloy in the light of experimental and quantum chemistry[J].Electrochemistry communications,2007(11):2709-2715. |
| [13] | Taraszewska J;Roslonek G .Electrocatalytic oxidation of methanol on a glassy carbon electrode modified by nickel hydroxide formed by ex situ chemical precipitation[J].Journal of Electroanalytical Chemistry,1994,364:209-213. |
| [14] | Macor K A;Spiro T G .Porphyrin electrode films prepared by electrooxidation of metalloprotoporphyrins[J].Journal of the American Chemical Society,1983,105:5601-5607. |
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