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首页> 外文期刊>RSC Advances >Polydopamine-functionalized multi-walled carbon nanotubes-supported palladium–lead bimetallic alloy nanoparticles as highly efficient and robust catalysts for ethanol oxidation
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Polydopamine-functionalized multi-walled carbon nanotubes-supported palladium–lead bimetallic alloy nanoparticles as highly efficient and robust catalysts for ethanol oxidation

机译：聚二胺官能化的多壁碳纳米管负载钯 - 铅双金属合金纳米粒子作为乙醇氧化的高效且稳健的催化剂

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摘要

High performance electrocatalysts of palladium–lead bimetallic alloy nanoparticles anchored onto polydopamine-functionalized multi-walled carbon nanotubes (PDA-MWCNTs) were fabricated by a facile one-step strategy. The PDA-MWCNTs, a superior electrocatalyst support, could be easily obtained through a mild and friendly method. Then, the palladium–lead alloy nanoparticles with different amounts of lead were uniformly anchored on the PDA-MWCNTs through a facile and surfactant-free one-step co-reduction approach. The morphologies, structures, compositional and electronic properties of the catalysts were analyzed by various techniques. As direct ethanol alkaline fuel cells (DEAFCs) catalysts, the new electrocatalysts exhibited improved electrocatalytic activities and enhanced electrochemical stabilities due to the synergistic effect of PDA and Pb as explained by the dispersive effect, bi-functional mechanism and d-band theory. In particular, the Pd _(3) Pb/PDA-MWCNTs, as the proposed catalyst, possesses a larger electrochemical active surface area, higher electrocatalytic activity, more negative onset oxidative potential and stability for ethanol electrooxidation compared to other as-prepared electrocatalysts. Therefore, the proposed electrocatalyst is a promising catalyst for DEAFCs and the PDA-MWCNTs is believed to have potential use in other fields as well.
机译：通过容易的一步策略制造锚定的高性能电催化剂的高性能电催化剂锚定的聚二胺官能化的多壁碳纳米管（PDA-MWCNT）。通过温和友好的方法可以容易地获得PDA-MWCNT，卓越的电催化剂载体。然后，通过舒适和无表面活性剂的单步协调方法将具有不同铅的钯 - 铅合金纳米颗粒均匀地固定在PDA-MWCNT上。通过各种技术分析催化剂的形态，结构，组成和电子性质。作为直接乙醇碱性燃料电池（聋脂）催化剂，新的电催化剂由于PDA和Pb的协同效应，如色散效应，双功能机制和D波段理论所解释的。特别地，与所提出的催化剂，作为所提出的催化剂，Pd _（3）Pb / PDA-MWCNT具有较大的电化学活性表面积，与其他作为制备的电催化剂相比，乙醇电氧化更高的电催化活性，更负面发作氧化潜力和稳定性。因此，所提出的电催化剂是用于骨折的有望催化剂，并且认为PDA-MWCNT也具有在其他领域的潜在用途。

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