| CMK-5负载Pt-Ni合金催化剂及其甲醇电化学氧化性能 |
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| 引用本文： | 丁晓春,陈秀,周建华,王涛,孙盾,何建平.CMK-5负载Pt-Ni合金催化剂及其甲醇电化学氧化性能[J].物理化学学报,2011,27(3):711-716. |
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| 作者姓名： | 丁晓春 陈秀 周建华 王涛 孙盾 何建平 |
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| 作者单位： | College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China |
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| 摘 要： | 采用NaBH4还原法将不同原子比的铂镍负载于CMK-5(由SBA-15模板所得的碳载体)表面. X射线衍射(XRD)和X射线光电子能谱(XPS)测试结果表明, 所得催化剂是以铂镍合金的形式存在, 相对于Pt/CMK-5而言, 这种合金化的催化剂中Pt表现出更多的金属态. 电化学测试结果显示, 在催化剂中主要以化合态存在的镍(包括NiO、Ni(OH)2和NiOOH)可能更有利于甲醇的吸附和氧化产物从催化剂表面的脱附. 另外, 从循环伏安测试结果可知, Pt-Ni/CMK-5 (5:1)(原子比)具有较大的比表面活性, 其电化学活性面积高达63.9 m2·g-1, 且与Pt/CMK-5相比抗CO中毒能力有明显改善.
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| 关 键 词： | CMK-5 Pt/CMK-5催化剂 Pt-Ni/CMK-5催化剂 甲醇 电化学氧化 |
| 收稿时间： | 2010-10-27 |
| 修稿时间： | 2011-02-16 |
Pt-Ni Catalyst Supported on CMK-5 for the Electrochemical Oxidation of Methanol |
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| DING Xiao-Chun,CHEN Xiu,ZHOU Jian-Hua,WANG Tao,SUN Dun,HE Jian-Ping.Pt-Ni Catalyst Supported on CMK-5 for the Electrochemical Oxidation of Methanol[J].Acta Physico-Chimica Sinica,2011,27(3):711-716. |
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| Authors: | DING Xiao-Chun CHEN Xiu ZHOU Jian-Hua WANG Tao SUN Dun HE Jian-Ping |
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| Institution: | College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China |
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| Abstract: | Pt-Ni alloy catalysts with different atomic ratios were deposited on CMK-5 (carbon replicated from SBA-15 silica) by NaBH4 reduction. X-ray diffraction (XRD) suggests alloy formation between Pt and Ni. X-ray photoelectron spectroscopy (XPS) shows that Pt-Ni/CMK-5 (5:1) has more detectable oxidized Ni. More metallic Pt is present on Pt-Ni/CMK-5 (5:1) (atomic ratio) than on Pt/CMK-5. Oxidized Ni species, such as NiO, Ni(OH)2> and NiOOH, favor the adsorption of methanol and the dissociation of methanol from the surface of Pt. Cyclic voltammetry shows that Pt-Ni/CMK-5 (5:1) has the highest specific activity among the as-made catalysts and its electrochemical active area is 63.9 m2·g-1. It has more resistance to CO poisoning than Pt/CMK-5. |
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| Keywords: | CMK-5 |
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