Bimetallic core-shell nanostructures have been gaining considerable research attentions recently, mainly thanks to their versatile applications in many fields, including catalysis, electrocatalysis, electronic, sensing and so on. Herein, we demonstrate a peptide templated [email protected] core-shell structure for both oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER). By employing peptide sequence FlgA3 as surface capping agent, core-shell structure with Pd nanoparticles coated on the surface of Au nanoparticles were prepared. The [email protected] core-shell structures demonstrated effective electrocatalytic activities toward both ORR and HER, whereas the catalytic activity was optimized by tuning the Pd-to-Au ratio. Among a series of samples tested, we discovered that the [email protected]_1.0 sample exhibited the best ORR activity, superior to that of Pt/C and Pd/C, while its HER activity was also among the finest, close to that of Pt/C and Pd/C. The [email protected]_1.0 sample also exhibited remarkable stability beyond Pt/C and Pd/C in both ORR and HER. Such intriguing electrocatalytic performances are attributed to the core-shell structure induced lattice strain. The results offer reliable pathway for designing peptide templated core-shell bimetallic nanostructures as dual or multiple functional electrocatalysts with excellent electrocatalytic activities and longevity.

双金属核-壳纳米结构近来受到了广泛的研究关注，这主要是由于其在许多领域的广泛应用，包括催化，电催化，电子，传感等。在本文中，我们证明了用于氧还原反应（ORR）和氢释放反应（HER）的肽模板化[电子邮件保护]核-壳结构。以肽序列FlgA3为表面封闭剂，制备了Pd纳米颗粒包覆在Au纳米颗粒表面的核-壳结构。[受电子邮件保护的]核-壳结构对ORR和HER均显示出有效的电催化活性，而通过调节Pd与Au的比例可以优化催化活性。在一系列测试样本中，我们发现[电子邮件保护] _1.0样品表现出最好的ORR活性，优于Pt / C和Pd / C，而其HER活性也最好，接近Pt / C和Pd / C。[电子邮件保护的] _1.0样本在ORR和HER中均显示出超过Pt / C和Pd / C的出色稳定性。这种有趣的电催化性能归因于核-壳结构诱导的晶格应变。该结果为设计肽模板化的核壳双金属纳米结构作为具有优异的电催化活性和长寿命的双功能或多功能电催化剂提供了可靠的途径。