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首页> 外文期刊>RSC Advances >Highly CO tolerant PtRu/PtNi/C catalyst for polymer electrolyte membrane fuel cell
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Highly CO tolerant PtRu/PtNi/C catalyst for polymer electrolyte membrane fuel cell

机译：用于聚合物电解质膜燃料电池的高CO耐受性PtRu / PtNi / C催化剂

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摘要

Galvanic displacement and annealing treatment were used to construct a PtRu/PtNi/C catalyst with PtRu on the surface and PtNi in the core. PtNi alloy was formed during high-temperature reduction, and the surface Ni in the PtNi alloy was subsequently replaced by Ru in RuCl3 solution. The H2 annealing treatment at 300 °C increased the crystallinity by surface PtRu alloy formation. The prepared PtRu/PtNi/C catalyst demonstrated higher CO electro-oxidation activity than PtNi/C, PtNi–Ru/C and PtRu/C catalysts. The enhanced CO tolerance is ascribed to the synergistic effect between the PtRu surface and the PtNi core, which induces oxygen containing species produced on surface Ru sites at low potentials, weakened adsorption of CO on metal sites, and high PtRu utilization.
机译：采用电流置换和退火处理的方法制备了PtRu / PtNi / C催化剂，其表面为PtRu，芯为PtNi。在高温还原过程中会形成PtNi合金，然后在RuCl 3 溶液中用Ru代替PtNi合金中的表面Ni。在300°C的H 2 退火处理通过表面PtRu合金的形成提高了结晶度。制备的PtRu / PtNi / C催化剂比PtNi / C，PtNi-Ru / C和PtRu / C催化剂具有更高的CO电氧化活性。增强的CO耐受性归因于PtRu表面与PtNi核之间的协同效应，该效应可诱导在表面Ru位置上以低电势产生含氧物质，减弱CO在金属位置上的吸附，并提高PtRu利用率。

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