alpha-Fe2O3 as a versatile and efficient oxygen atom transfer catalyst in combination with H2O as the oxygen source
alpha-Fe2O3 as a versatile and efficient oxygen atom transfer catalyst in combination with H2O as the oxygen source
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α-Fe2O3 作为一种多功能且高效的氧原子转移催化剂，与 H2O 结合作为氧源
DOI：
10.1038/s41929-021-00659-1
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发表时间：
2021
期刊：
影响因子：
37.8
通讯作者：
Zhao Jincai
中科院分区：
文献类型：
--
作者：
Zhao Yukun;Deng Chaoyuan;Tang Daojian;Ding Liyong;Zhang Yuchao;Sheng Hua;Ji Hongwei;Song Wenjing;Ma Wanhong;Chen Chuncheng;Zhao Jincai
赤铁矿（α-Fe2O3）作为光电化学水氧化的光阳极已被广泛研究，但其产物o2的经济价值较低。在这里，我们将其应用扩展到生产增值化学品，并报道了它在可见光照射下作为一种多功能和高效的氧原子转移催化剂的能力。以水为唯一氧源，成功地将多种有机化合物和无机阴离子以高选择性和法拉第效率氧化成相应的单氧产物。光激发空穴在α- fe2o3表面产生铁氧（FeIV=O），氧原子转移过程是通过一个协调的双空穴转移途径进行的，即氧原子从FeIV=O表面转移到底物。本研究证明α- fe2o3是一种优良的全无机非均相催化剂，用于驱动氧原子转移反应，该策略在精细高附加值化学品的合成中具有重要的潜力。
Haematite (α-Fe2O3) has been extensively investigated as a photoanode in photoelectrochemical water oxidation, but the product O2has a low economic value. Here we expand its applications to the production of value-added chemicals and report its ability to act as a versatile and efficient oxygen atom transfer catalyst under visible-light irradiation. A variety of organic compounds and inorganic anions were successfully oxidized to the corresponding monooxygenation products with high selectivity and Faradaic efficiency by using water as the sole oxygen source. Photoexcited holes generate iron–oxo species (FeIV=O) on α-Fe2O3surfaces and the process of oxygen-atom transfer is proposed to proceed via a concerted two-hole transfer pathway that involves the transfer of oxygen atoms from the surface FeIV=O to the substrates. The present study proves α-Fe2O3is an excellent all-inorganic heterogeneous catalyst to drive oxygen atom transfer reactions, and this strategy has significant potential for the synthesis of fine and high-value-added chemicals.