引用本文:
李恒, 孔令斌, 张晶, 王儒涛, 罗永春, 康龙. 电化学方法制备高分散Pt/CMK-3及其对甲醇电化学催化性能[J]. 应用化学,
2010, 27(9): 1065-1070.
doi:
10.3724/SP.J.1095.2010.90771
Citation: LI Heng, KONG Ling-Bin, ZHANG Jing, WANG Ru-Tao, LUO Yong-Chun, KANG Long. Electrodeposited Platinum Nanoparticles on Mesoporous Carbon CMK-3 and Its Electrocatalytic Performance for Methanol Oxidation[J]. Chinese Journal of Applied Chemistry, 2010, 27(9): 1065-1070. doi: 10.3724/SP.J.1095.2010.90771
Citation: LI Heng, KONG Ling-Bin, ZHANG Jing, WANG Ru-Tao, LUO Yong-Chun, KANG Long. Electrodeposited Platinum Nanoparticles on Mesoporous Carbon CMK-3 and Its Electrocatalytic Performance for Methanol Oxidation[J]. Chinese Journal of Applied Chemistry, 2010, 27(9): 1065-1070. doi: 10.3724/SP.J.1095.2010.90771
电化学方法制备高分散Pt/CMK-3及其对甲醇电化学催化性能
摘要:
采用直接电化学还原法在介孔碳(CMK-3)载体上直接电沉积高分散的铂纳米颗粒,制备CMK-3复合铂纳米颗粒电极(Pt/CMK-3)。通过透射电子显微镜分析发现,铂纳米颗粒非常均匀的分布在CMK-3上,平均粒径约5nm。通过循环伏安测试,分析了催化剂不同负载铂含量时氯铂酸的利用率,在理论铂质量分数为20%时,这种方法制备的Pt/CMK-3所使用的氯铂酸的利用率最高,在1mol/LCH3OH+0.5mol/LH2SO4溶液中循环伏安测试电流密度达到382A/g。在相同实验条件下,Pt/CMK-3电极对甲醇电催化活性远高于Pt/XC-72(炭黑)电极和用常规电沉积方法制备的Pt/CMK-3电极。
English
Electrodeposited Platinum Nanoparticles on Mesoporous Carbon CMK-3 and Its Electrocatalytic Performance for Methanol Oxidation
Abstract:
A new approach to directly electrodeposit platinum nanoparticles onto the mesoporous carbon CMK-3 via cyclic potential scanning technique was used to obtain Pt/CMK-3(Ⅰ) electrode. TEM images show that Pt nanoparticles with an average particle size of about 5 nm have been attached on the outer surface of the CMK-3. The electrocatalytic activity of Pt/CMK-3 for methanol oxidation was studied. When the platinum loading was 20% in the catalysts,the H2PtCl6 exhibited the maximum efficiency; current density was 382 A/g in 1 mol/L CH3OH+0.5 mol/L H2SO4 solution. The Pt/CMK-3 catalyst presented here possessed higher electrocatalytic activity than Pt/XC-72 and Pt/CMK-3 prepared by conventional electrodepositing method.
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Key words:
- mesoporous carbon CMK-3
- / electrodeposited
- / platinum
- / fuel cell
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