Microemulsion Synthesized Pt ∕ Ru ∕ Sn Nanoparticles on BDD for Alcohol Electro-oxidation
Microemulsion Synthesized Pt ∕ Ru ∕ Sn Nanoparticles on BDD for Alcohol Electro-oxidation
复制标题
BDD上微乳液合成Pt∕Ru∕Sn纳米粒子用于酒精电氧化
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
C. Comninellis
中科院分区：
文献类型：
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作者：
G. Siné;D. Smida;M. Limat;G. Fóti;C. Comninellis
采用微乳液法合成了三元pt基纳米粒子（标称成分Pt80Ru10Sn10），并将其沉积在掺硼金刚石（BDD）电极上。透射电镜测得的颗粒尺寸在2-5nm直径范围内。x射线光电子能谱显示，在Pt∕Ru∕Sn三元纳米粒子中，Pt4f7∕2线没有发生化学位移。对于甲醇和乙醇电氧化，三元催化剂表现出比纯Pt或相应的双金属（Pt / Ru和Pt / Sn）催化剂更低的起始电位。三元Pt / Ru / Sn催化剂对甲醇的氧化比乙醇的完全氧化更有效，因为乙醇的电氧化在乙醛和/或乙酸形成时停止，三元催化剂不能激活C-C键的断裂。
Ternary Pt-based nanoparticles (nominal composition Pt80Ru10Sn10 ) were synthesized via the microemulsion route and deposited onto boron-doped diamond (BDD) electrode. The particle size measured by transmission electron microscopy was in the 2–5nm diam range. X-ray photoelectron spectroscopy revealed a slightly different surface composition from that of the bulk and showed no chemical shift of the Pt4f7∕2 line in ternary Pt∕Ru∕Sn nanoparticles. For both methanol and ethanol electro-oxidation, the ternary catalyst exhibited lower onset potentials than either pure Pt or the corresponding bimetallic (Pt∕Ru and Pt∕Sn ) catalysts. The ternary Pt∕Ru∕Sn catalyst was more efficient for methanol oxidation than for complete oxidation of ethanol, because ethanol electro-oxidation was stopped at acetaldehyde and/or acetic acid formation, the ternary catalyst being unable to activate the C-C bond scission.