Hierarchical Assembly of Prussian Blue Derivatives for Superior Oxygen Evolution Reaction
Hierarchical Assembly of Prussian Blue Derivatives for Superior Oxygen Evolution Reaction
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DOI：
10.1002/adfm.201904955
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发表时间：
2019-08
影响因子：
19
通讯作者：
Yueqing Wang;Si Chen;Jintao Zhang
中科院分区：
文献类型：
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作者：
Yueqing Wang;Si Chen;Jintao Zhang
普鲁士蓝类似物（PBAs）及其衍生物具有可调控的物理化学性质，是理想的化学传感、能量储存和转换功能材料。在此，一个创新的策略，证明了在各种金属基板上制备PBA纳米结构。金属氰化物离子和金属基底之间的界面氧化还原反应导致通过原位沉淀过程形成期望的PBA纳米结构。此外，可以通过改变反应溶液的pH值来容易地调节PBA的形态和生长速率。通过简单的热处理可以将所得的PBA纳米结构转化为相应的金属氧化物。更重要的是，该中空氧化物衍生物表现出相当大的催化活性，具有1.53 V的低电位，可实现10 mA cm-2的基准电流密度和超过600 h的令人印象深刻的持久耐用性。这种新的合成方法为在不同的金属基底上合成无粘合剂的PBAs及其衍生物提供了有利的途径，从而使具有特定应用所需形态和组成的新型纳米结构成为可能。
Prussian blue analogues (PBAs) and their derivatives with tailorable physicochemical properties are ideal functional materials for chemical sensing, energy storage, and conversion. Herein, an innovative strategy is demonstrated to prepare PBA nanoarchitectures on various metal substrates. The interfacial redox reactions between metal cyanide ions and metal substrate result in the formation of desirable PBA nanostructures via the in situ precipitation process. Furthermore, the morphology and growth rates of PBAs can be readily regulated by changing the pH value of the reaction solution. The obtained PBA nanostructures can be transformed into the corresponding metal oxides via the simple thermal treatment. More importantly, the hollow oxide derivative manifests considerable catalytic activity with a low potential of 1.53 V to achieve the benchmark current density of 10 mA cm−2 and impressive prolonged durability over 600 h. This novel synthetic approach provides a favorable pathway to synthesize binder‐free PBAs and their derivatives on diverse metal substrates, enabling new kinds of nanoarchitectures with desirable morphology and compositions for specific applications.