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Prussian blue analogues and their derived nanomaterials for electrocatalytic water splitting
Coordination Chemistry Reviews ( IF 20.6 ) Pub Date : 2019-12-31 , DOI: 10.1016/j.ccr.2019.213156
Li-Ming Cao , David Lu , Di-Chang Zhong , Tong-Bu Lu

The electrocatalytic water splitting is considered as a prospect meaning to address the urgent energy and environmental problems. However, the electrocatalytic water splitting is greatly limited by the high overpotentials of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Especially, OER involves a complex multistep proton-coupled electron transfer process, which demands a high overpotential to accelerate this sluggish oxygen evolution kinetics. The high overpotentials for OER significantly decrease the efficiency of the overall water splitting. The OER half reaction has thus become the bottleneck of electrocatalytic overall water splitting. It is vital to synthesize highly active electrocatalysts to reduce the activation energy of the reaction and accelerate the generation of H2 and O2, thereby improving the efficiency of the overall water splitting. Prussian blue analogues (PBAs) are representative cyanide-based coordination polymer materials. PBAs possess open framework structures, large specific surface areas, adjustable metal active sites and uniform catalytic centers, showing promising application in electrocatalytic water splitting. Besides, benefiting from the unique structural features of PBAs, their derived electrocatalysts also have large specific surface areas and uniform active sites. Moreover, PBAs can serve as carbon and nitrogen sources. The doped N can regulate the electronic structure of surface active sites, enhancing the intrinsic activity of electrocatalysts. Therefore, the PBA-derived electrocatalysts also exhibit good catalytic performance for water splitting. In this review, we not only summarize the most recent advances on PBAs and their derivatives as electrocatalysts for water splitting, but also conclude the core scientific challenges faced in water splitting. Finally, we provide perspectives for the future research in this field, including catalyst design, catalytic system establishment and so on.



中文翻译:

普鲁士蓝类似物及其衍生的纳米材料用于电催化水分解

电催化水分解被认为是解决紧急能源和环境问题的前景。然而,电催化水分解受到制氢反应(HER)和制氧反应(OER)的高过电势的极大限制。特别地,OER涉及复杂的多步质子耦合电子转移过程,这需要很高的超电势来加速这种缓慢的氧释放动力学。OER的高过电势大大降低了整个水分解的效率。因此,OER半反应已成为电催化总水分解的瓶颈。合成高活性电催化剂以降低反应的活化能并加速H 2和O的生成至关重要2个,从而提高了整体水分解的效率。普鲁士蓝类似物(PBA)是代表性的基于氰化物的配位聚合物材料。PBA具有开放的骨架结构,较大的比表面积,可调节的金属活性位点和均匀的催化中心,在电催化水分解中显示出广阔的应用前景。此外,得益于PBA的独特结构特征,其衍生的电催化剂还具有较大的比表面积和均一的活性位点。此外,PBA可以用作碳源和氮源。掺杂的N可以调节表面活性位的电子结构,从而增强电催化剂的固有活性。因此,源自PBA的电催化剂对于水分解也显示出良好的催化性能。在这篇评论中,我们不仅总结了PBA及其衍生物作为水分解电催化剂的最新进展,还总结了水分解面临的核心科学挑战。最后,我们为该领域的未来研究提供了前景,包括催化剂设计,催化剂体系的建立等。

更新日期:2019-12-31
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