标题：Interfacial Scaffolding Preparation of Hierarchical PBA-Based Derivative Electrocatalysts for Efficient Water Splitting
作者：Wang, Yueqing; Ma, Jizhen; Wang, Jun; Chen, Si; Wang, Huaisheng; Zhang, Jintao
作者机构：[Wang, Yueqing; Ma, Jizhen; Wang, Jun; Chen, Si; Zhang, Jintao] Shandong Univ, Minist Educ, Sch Chem & Chem Engn, Key Lab Colloid & Interface Chem, Ji 更多
通讯作者：Zhang, JT;Zhang, JT;Zhang, Jintao
通讯作者地址：[Zhang, JT]Shandong Univ, Minist Educ, Sch Chem & Chem Engn, Key Lab Colloid & Interface Chem, Jinan 250100, Shandong, Peoples R China;[Zhang, JT]Shan 更多
来源：ADVANCED ENERGY MATERIALS
关键词：electrocatalysis; hydrogen evolution reaction; oxygen evolution; reaction; Prussian blue analogue; water splitting
摘要：The development of highly efficient and durable electrocatalysts is crucial for overall water splitting. Herein, the in situ scaffolding formation of 3D Prussian blue analogues (PBAs) on a variety of 2D or 1D metal hydroxides/oxides to fabricate hierarchical nanostructures is first demonstrated. Typically, cobalt hydroxide or oxide nanoarrays are used as the precursor and structural oriented template for the subsequent growth of 3D PBA nanocubes. The mechanism study reveals that the interfacial scaffolding process can be reversibly controlled via the in situ ion exchange process with adjusting coordination ions. Thus, the facile, versatile strategy can extend to successfully fabricate a variety of hierarchical PBA-based nanostructures including on cobalt fluoride hydroxide, copper hydroxide, monometal or bimetal nickel-cobalt hydroxides, cobalt oxide, and manganese oxide nanosheets with structural tailor-ability and chemical diversity. More interestingly, the metal nitride derivatives obtained via controlled calcination process exhibit good electrocatalytic activity for water splitting with low overpotentials, and remarkable durability for 1200 h, thanks to the superior intrinsic activity of bimetal nature and the scrupulous hierarchical structure. This versatile strategy provides a paradigm for rational design of PBA-based functional nanomaterials, which is highly promising in energy conversion, storage, and electrocatalytic fields.