- 期刊
金屬有機骨架觸媒應用於水分解光電化學電池
Metal-organic Frameworks for Water Splitting Photoelectrochemical Cells
摘要
金屬有機骨架（MOFs）由金屬團簇與有機配體形成有序地排列，近來年各種類型的MOF類似物、MOF複合材料、MOF衍生物等被廣泛應用在水分解光電化學電池中（PECs），作為產氧半反應（OER）或產氫反應（HER）的新型半導體觸媒。本文簡述水分解相關研究所使用的觸媒材料之反應機制、設計理念與發展歷程，也同時介紹引入MOF作為光觸媒或電觸媒時所帶來的突破。本文聚焦於近三年本質MOF單晶結構與其光電化學效能之探索。排除了MOF與不同添加劑、黏合劑、混合物等所形成的複合材料，也排除經過200°C以上鍛燒後所產生的MOF衍生物，避免MOF結構崩潰或其他副反應，造成水分解效能解析的偏差。根據不同MOF的單晶結構，MOF光觸媒遇到吸光係數不足與導電性不足等瓶頸。而MOF電觸媒可達到優異的水分解效能，透過雙／三金屬MOF和異質MOF-on-MOF組裝可帶來的優異的協同效應，有望未來結合更多不同吸光基團，增益太陽能－化學能的轉換。
並列摘要
Metal-organic frameworks (MOFs) are constructed by metal clusters and organic linkers to afford the well-ordered coordination polymers. Recently, various types of MOF analogues, MOF composites, and MOF derivatives have been widely used as the novel semiconductive catalysts for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in water splitting photoelectrochemical cells (PECs). In this article, the reaction mechanism, design principle, and development path of catalysts for PECs are mentioned. The breakthrough by introducing MOFs as the photocatalysts and electrocatalysts for PECs are also included. This article focused on the intrinsic single crystal structures of several MOFs and their PEC performance. MOF-based composites using additives, binders, or mixtures are excluded. MOF-based derivatives treated over 200 °C are also excluded, in order to avoid the mis-understanding of PEC performance with the presence of MOF decomposition or other side-products. According to various single crystal structures of MOFs, MOF photocatalysts suffered from insufficient extinction coefficient and poor conductivity. MOF electrocatalysts achieved outstanding PEC performance by the synergetic effect of dual/tri-metallic MOF or heterogeneous MOF-on-MOF assembly. The insertion of light-harvesting moieties to high-performance MOF electrocatalysts can be expected to improve the solar-to-hydrogen conversion in the near future.