A hydrated amorphous iron oxide nanoparticle as active water oxidation catalyst

作     者：Zheng Chen Qinge Huang Baokun Huang Fuxiang Zhang Can Li 陈政;黄清娥;黄保坤;章福祥;李灿

作者机构：State Key Laboratory of CatalysisDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian National Laboratory for Clean EnergyDalian 116023LiaoningChina 

出 版 物：《Chinese Journal of Catalysis》 (催化学报（英文）)

年 卷 期：2019年第40卷第1期

页      面：38-42页

核心收录：

学科分类：081705[工学-工业催化] 0817[工学-化学工程与技术] 08[工学] 0703[理学-化学] 

基　　金：supported by the Basic Research Program of China(973 Program,2014CB239403) National Natural Science Foundation of China(21522306,21633009) Key Research Program of Frontier Sciences,CAS(QYZDY-SSW-JSC023) 

主　　题：Artificial photosynthesis Water oxidation Iron oxide Hydration Amorphous 

摘      要：Developing efficient water oxidation catalysts(WOCs)with earth‐abundant elements still remains a challenging task for artificial ***‐based WOC is a promising candidate because it is economically cheap,little toxic and environmentally *** this study,we found that the catalytic water oxidation activity on amorphous iron‐based oxide/hydroxide(FeOx)can be decreased by an order of magnitude after the dehydration process at room *** analysis,XRD and Raman results indicated that the dehydration process of FeOx at room temperature causes the almost completely loss of water molecule with no bulk structural *** on this finding,we prepared hydrated ultrasmall(ca.2.2 nm)FeOx nanoparticles of amorphous feature,which turns out to be extremely active as WOC with turnover frequency(TOF)up to 9.3 s^-1 in the photocatalytic Ru(bpy)3^2+‐Na2S2O8 *** findings suggest that future design of active iron‐based oxides as WOCs requires the consideration of their hydration status.