Efficient Photochemical, Thermal, and Electrochemical Water Oxidation Catalyzed by a Porous Iron-Based Oxide Derived Metal–Organic Framework
Efficient Photochemical, Thermal, and Electrochemical Water Oxidation Catalyzed by a Porous Iron-Based Oxide Derived Metal–Organic Framework
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DOI：
10.1021/acs.jpcc.5b11533
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发表时间：
2016-01
影响因子：
3.7
通讯作者：
Yingying Feng;Jie Wei;Yong Ding
中科院分区：
文献类型：
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作者：
Yingying Feng;Jie Wei;Yong Ding
铁基催化剂由于其高丰度、低毒性和丰富的氧化还原性质而对于水氧化特别感兴趣。本文报道了以普鲁士蓝类似物（PBA）Mx[Fe（CN）6]y（M = Fe，Co，Ni）为前驱体，经煅烧得到的低成本多孔铁基氧化物。这种合成方法涉及一个简单的自组装技术和低温退火过程。研究了这些催化剂的光催化、铈（IV）驱动和电化学水氧化，并且它们表现出上级活性。值得注意的是，这种光催化水氧化是在类似于天然光系统II的中性条件下进行的。在中性pH条件下，多孔CoxFe 3-xO 4光催化水氧化反应的初始转换频率（TOF）为5.4 × 10- 4s-1/过渡金属原子，与已发表的铁基催化剂相当.在铈（IV）驱动的水氧化条件下，TOF的…
Iron-based catalysts are of particular interest for water oxidation because of their high abundance, low toxicity, and rich redox properties. Herein, we report low cost porous iron-based oxides derived from calcining precursors of Prussian blue analogue (PBA) Mx[Fe(CN)6]y (M = Fe, Co, Ni). This synthesis approach involves a simple self-assembly technology and a low-temperature annealing procedure. These catalysts were investigated for photocatalytic, cerium(IV)-driven, and electrochemical water oxidation, and they exhibited superior activity. It is noteworthy that this photocatalytic water oxidation was conducted under neutral conditions that are similar to the natural photosystem II. The high initial turnover frequency (TOF) of ∼5.4 × 10–4 s–1 per transition metal atom at the first 60 s is obtained under neutral pH using porous CoxFe3–xO4 in photocatalytic water oxidation reaction, which is comparable with those published iron-based catalysts. Under cerium(IV)-driven water oxidation conditions, the TOF o...