Electrochemical effect of gold nanoparticles on Pt/α-Fe2O3/C for use in methanol oxidation in alkaline solution
Electrochemical effect of gold nanoparticles on Pt/α-Fe2O3/C for use in methanol oxidation in alkaline solution
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DOI：
10.1016/j.electacta.2006.10.018
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发表时间：
2007-03
影响因子：
6.6
通讯作者：
K. Miyazaki;H. Ishihara;K. Matsuoka;Y. Iriyama;K. Kikuchi;Y. Uchimoto;T. Abe;Z. Ogumi
中科院分区：
文献类型：
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作者：
K. Miyazaki;H. Ishihara;K. Matsuoka;Y. Iriyama;K. Kikuchi;Y. Uchimoto;T. Abe;Z. Ogumi
采用共沉淀法制备了Pt/α-Fe 2 O3/C纳米金催化剂，并采用电化学方法和高效液相色谱法（HPLC）评价了该催化剂在碱性溶液中对甲醇、甲醛和甲酸的催化氧化活性。纳米金的加入仅提高了催化剂对甲醇和甲醛的氧化活性，而对甲酸的氧化活性没有提高。对甲醇氧化进行HPLC分析以检测氧化产物。HPLC分析表明，在Pt/nano-Au/α-Fe_2O_3/C体系中仅检测到甲酸根阴离子，且甲酸根阴离子占总通过电荷的比例小于Pt/C体系，表明甲酸不是甲醇氧化的最终产物。这些结果表明，金纳米颗粒促进甲醇氧化为CO2。
A catalyst containing gold nanoparticles with Pt/α-Fe2O3/C was prepared by a co-precipitation method and its catalytic activity for the oxidation of methanol, formaldehyde, and formic acid in alkaline solutions was evaluated by an electrochemical method and high-performance liquid chromatography (HPLC). The addition of gold nanoparticles improved catalytic activity only for the oxidation of methanol and formaldehyde, and not for the oxidation of formic acid. HPLC analysis was performed for methanol oxidation to detect the oxidative products. In HPLC analysis, only formate anion could be detected in the electrolyte solution and the ratio of formate anion obtained to the total passed charge in Pt/nano-Au/α-Fe2O3/C was less than that in Pt/C, indicating that formic acid is not the final product of methanol oxidation. These results show that gold nanoparticles promoted methanol oxidation up to CO2.