Highly active and durable electrocatalysts are vital for commercialization of direct methanol fuel cells. In this work, a three-dimensional nanocomposite consisting of platinum nanoparticles, W₁₈O₄₉ nanocables, and reduced graphene oxide composite (Pt/W₁₈O₄₉ NCs–rGO) has been prepared as an electrocatalyst for methanol oxidation reaction (MOR). The catalyst is prepared through a two-step method. The W₁₈O₄₉ nanocables and the reduced graphene oxide composite are prepared by a solvothermal process. Then, Pt nanoparticles are loaded on the W₁₈O₄₉ nanocables and the reduced graphene oxide composite by a hydrogen reduction at ambient condition. The obtained catalyst has a special three-dimensional architecture consisting of two-dimensional nanosheets, assembled one-dimensional nanocables, and the loaded nanoparticles on their surface. The Pt/W₁₈O₄₉ NCs–rGO catalyst shows 1.56 time mass activities than the Pt/C, with the current density of the forward anodic peak reaching 1624 mA/mg_Pt at 0.854 V versus reversible hydrogen electrode potential in 0.1 M HClO₄ and 0.5 M CH₃OH mixed electrolyte. It also shows a strong antipoisoning property toward CO. For the durability testing, the current density of Pt/W₁₈O₄₉ NCs–rGO shows a 37% decay, whereas the current of Pt/C catalyst shows a 41% degradation from 600 to 3600 s at 0.7 V. The high activity toward MOR, good antipoisoning for intermediate products, and excellent stability are ascribed to strong metal–support interaction effects between the Pt nanoparticles and the W₁₈O₄₉ NCs.

中文翻译：

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Pt纳米颗粒负载在W ₁₈ O ₄₉纳米电缆–rGO纳米复合材料上，作为甲醇电氧化的高活性和持久性催化剂

高活性和耐用的电催化剂对于直接甲醇燃料电池的商业化至关重要。在这项工作中，由铂纳米粒子，W ₁₈ O ₄₉纳米电缆和还原型氧化石墨烯复合物（Pt / W ₁₈ O ₄₉ NCs- rGO）组成的三维纳米复合材料已制备为甲醇氧化反应（MOR）的电催化剂。该催化剂通过两步法制备。W ₁₈ O ₄₉纳米电缆和还原的氧化石墨烯复合材料是通过溶剂热法制备的。然后，将Pt纳米颗粒负载在W ₁₈ O _49上纳米电缆和还原的石墨烯氧化物复合材料通过在环境条件下进行氢还原而得到。所获得的催化剂具有特殊的三维结构，该结构由二维纳米片，组装的一维纳米电缆以及在其表面上负载的纳米颗粒组成。Pt / W ₁₈ O ₄₉ NCs-rGO催化剂的质量活度比Pt / C高1.56，正向阳极峰的电流密度在0.854 V时达到1624 mA / mg _Pt，而在0.1 M HClO _4中可逆的氢电极电势和0.5 M CH ₃ OH混合电解质。它还显示出对CO的强抗毒性能。对于耐久性测试，Pt / W ₁₈ O ₄₉的电流密度NCs–rGO表现出37％的衰减，而Pt / C催化剂的电流在0.7 V下从600到3600 s表现出41％的降解。对MOR的高活性，良好的中间产物抗毒性和出色的稳定性归因于强Pt纳米粒子与W ₁₈ O ₄₉ NCs之间的金属-载体相互作用效应。