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Facile Synthesis of Porous Pd3Pt Half‐Shells with Rich “Active Sites” as Efficient Catalysts for Formic Acid Oxidation
Small ( IF 13.0 ) Pub Date : 2018-02-06 , DOI: 10.1002/smll.201703940 Xiaoxiao Yan 1 , Xuejiao Hu 1 , Gengtao Fu 1, 2 , Lin Xu 1 , Jong-Min Lee 2 , Yawen Tang 1
Small ( IF 13.0 ) Pub Date : 2018-02-06 , DOI: 10.1002/smll.201703940 Xiaoxiao Yan 1 , Xuejiao Hu 1 , Gengtao Fu 1, 2 , Lin Xu 1 , Jong-Min Lee 2 , Yawen Tang 1
Affiliation
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Exploring highly efficient electrocatalysts is greatly important for the widespread uptake of the fuel cells. However, many newly generated nanocrystals with attractive nanostructures often have extremely limited surface area or large particle‐size, which leads them to display limited electrocatalytic performance. Herein, a novel anode catalyst of hollow and porous Pd3Pt half‐shells with rich “active sites” is synthesized by using urea as a guiding surfactant. It is identified that the formation of Pd3Pt half‐shells involves the combination of bubble guiding, in situ deposition of particles and bubble burst. The obtained Pd3Pt half‐shells demonstrate a rich edge area with abundant exposed active sites and surface defects, indicating great potential for the electrocatalysis. When used as an electrocatalyst, the Pd3Pt half‐shells exhibit remarkably improved electrocatalytic performance for formic acid oxidation (FAO), where it promotes the dehydrogenation process of FAO by suppressing the formation of poisonous species COads via the electronic effect and ensemble effect.
中文翻译：
轻松合成具有丰富“活性位点”的多孔Pd3Pt半壳，作为甲酸氧化的高效催化剂
探索高效的电催化剂对于燃料电池的广泛吸收非常重要。但是，许多具有吸引人的纳米结构的新生成的纳米晶体通常具有极其有限的表面积或大粒径，这导致它们显示出有限的电催化性能。在此，以尿素为指导表面活性剂，合成了新型的中空多孔Pd 3 Pt半壳具有丰富“活性位”的阳极催化剂。可以确定的是，Pd 3 Pt半壳的形成涉及气泡引导，颗粒原位沉积和气泡破裂的组合。得到的Pd 3铂半壳具有丰富的边缘区域，具有丰富的暴露活性位点和表面缺陷，表明其具有巨大的电催化潜力。当用作电催化剂时，Pd 3 Pt半壳对甲酸氧化（FAO）表现出显着改善的电催化性能，它通过电子效应和整体效应抑制有毒物质CO广告的形成，从而促进了FAO的脱氢过程。。
更新日期：2018-02-06
中文翻译：
轻松合成具有丰富“活性位点”的多孔Pd3Pt半壳，作为甲酸氧化的高效催化剂
探索高效的电催化剂对于燃料电池的广泛吸收非常重要。但是，许多具有吸引人的纳米结构的新生成的纳米晶体通常具有极其有限的表面积或大粒径，这导致它们显示出有限的电催化性能。在此，以尿素为指导表面活性剂，合成了新型的中空多孔Pd 3 Pt半壳具有丰富“活性位”的阳极催化剂。可以确定的是，Pd 3 Pt半壳的形成涉及气泡引导，颗粒原位沉积和气泡破裂的组合。得到的Pd 3铂半壳具有丰富的边缘区域，具有丰富的暴露活性位点和表面缺陷，表明其具有巨大的电催化潜力。当用作电催化剂时，Pd 3 Pt半壳对甲酸氧化（FAO）表现出显着改善的电催化性能，它通过电子效应和整体效应抑制有毒物质CO广告的形成，从而促进了FAO的脱氢过程。。
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