采用微波辅助还原法制备出高活性碳载PdAu电催化剂,催化剂中Pd与Au能够形成合金,改变了催化剂表面活性组分的电子结构.使用十二烷基苯磺酸钠和P123表面活性剂制备出的催化剂能够不同程度地促进催化剂中活性粒子的分散,且大幅度提高催化剂对甲酸氧化的电催化活性和稳定性,其中使用表面活性剂P123制备的催化剂对甲酸氧化的峰电流密度可达到196.8×10-3 A/cm2,甲酸氧化4030 s后的稳定电流密度可达21.6×10-3A/cm2.CO类强吸附物种在电极表面的吸附依然是电流衰减的主要原因.
参考文献
| [1] | Yoo S J,Jeon T Y,Cho Y H,et al. Particle Size Effects of PtRu Nanoparticles Embedded in TiO2 on Methanol Electrooxidation[J].Electrochim Acta,2010,55:7939-7944. |
| [2] | Zhao Y C,Wang F Y,Tian J N,et al.Preparation of Pt/CeO2/HCSs Anode Electrocatalysts for Direct Methanol Fuel Cells[J].Electrochim Acta,2010,55:8998-9003. |
| [3] | Tsiouvaras N,Martinez-Huerta M V,Paschos O,et al.PtRuMo/C Catalysts for Direct Methanol Fuel Cells:Effect of the Pretreatment on the Structural Characteristics and Methanol Electrooxidation[J].Int J Hydrogen Energy,35:11478-11488. |
| [4] | Chang Y W,Liu C W,Wei Y C,et al.Promotion of PtRu/C Anode Catalysts for Ethanol Oxidation Reaction by Addition of Sn Modifier[J].Electrochem Commun,2009,11:2161-2164. |
| [5] | Zhu M Y,Sun G Q,Yan S Y,et al.Preparation,Structural Characterization and Activity for Ethanol Oxidation of CarbonSupported PtSnIn Catalyst[J].Energy Fuels,2009,23:403-407. |
| [6] | Yu X W,Pickup P G.Novel Pd-Pb/C Bimetallic Catalysts for Direct Formic Acid Fuel Cells[J].J Power Sources,2009,192:279-284. |
| [7] | Zhang Z H,Wang X G,Cui Z M,et al.Pd Nanoparticles Supported on WO3/C Hybrid Material as Catalyst for Oxygen Reduction Reaction[J].J Power Sources,2008,185:941-945. |
| [8] | Li X G,Hsing I M.Electrooxidation of Formic Acid on Carbon Supported Ptx Pd1-x (x =0 ～ 1)[J].Electrochim Acta,2006,51:3477-3483. |
| [9] | He Q G,Chen W,Mukerjee S,et al.Carbon-supported PdM(M =Au and Sn) Nanocatalysts for the Electrooxidation of Ethanol in High pH Media[J].J Power Sources,2009,187:298-304. |
| [10] | Zhang Z H,Ge J J,Ma L A,et al.Highly Active Carbon-supported PdSn Catalysts for Formic Acid Electrooxidation[J].Fuel Cells,2009,9:114-120. |
| [11] | Morales-Acosta D,Ledesma-Garcia J,Godinez L A,et al.Development of Pd and Pd-Co Catalysts Supported on Multiwalled Carbon Nanotubes for Formic Acid Oxidation[J].J Power Sources,2010,195:461-465. |
| [12] | Wang Y,Nguyen T S,Liu X W,et al.Novel Palladium-lead (Pd-Pb/C) Bimetallic Catalysts for Electrooxidation of Ethanol in Alkaline Media[J].J Power Sources,2010,195:2619-2622. |
| [13] | Liu Y,Wang L W,Wang G,et al.High Active Carbon Supported PdAu Catalyst for Formic Acid Electrooxidation and Study of the Kinetics[J].J Phys Chem C,2010,114:21417-21422. |
| [14] | Wang Y J,Wu B,Gao Y,et al.Kinetic Study of Formic Acid Oxidation on Carbon Supported Pd Electrocatalyst[J].J Power Sources,2009,192:372-375. |
| [15] | Hoshi N,Kuroda M,Hori Y.Voltammograms of Stepped and Kinked Stepped Surfaces of Palladium:Pd (S)-[n (111) x (100)]and Pd(S)-[n(100)x(110)][J].J Electroanal Chem,2002,521:155-160. |
| [16] | Hoshi N,Kida K,Nakamura M,et al.Structural Effects of Electrochemical Oxidation of Formic Acid on Single Crystal Electrodes of Palladium[J].J Phys Chem,B,2006,110:12480-12484. |
| [17] | Yu X W,Pickup P G.Mechanistic Study of the Deactivation of Carbon Supported Pd During Formic Acid Oxidation[J].Electrochem Commun,2009,11:2012-2014. |
| [18] | Zhou Y,Liu J G,Ye J L,et al.Poisoning and Regeneration of Pd Catalyst in Direct Formic Acid Fuel Cell[J].Electrochim Acta,2010,55:5024-5027. |
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