Highly active water oxidation on nanostructured biomimetic calcium manganese oxide catalysts

doi:10.1039/c5ta08217j

	Highly active water oxidation on nanostructured biomimetic calcium manganese oxide catalysts
	Zhao, Yaopeng 1; Rong, Feng 1,2; Zhao, Jiao 1; Chen, Zheng 1,2; Xu, Yuxing 1,2; Yang, Qihua 1; Li, Can 1
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2016
卷号	4 期号:17 页码:6585-6594
ISSN号	2050-7488
DOI	10.1039/c5ta08217j
文献子类	Article
英文摘要	Water oxidation is a crucial reaction step in solar-to-chemical energy conversion processes such as photocatalytic water splitting and carbon dioxide reduction. In natural photosynthesis, the water oxidation reaction is catalyzed by mu-oxido-Mn4Ca clusters in photosystem II (PSII). Herein, we report the fabrication of nanostructured biomimetic calcium manganese oxides (CaxMnOy) via a simple process under mild conditions utilizing H2O2 as an oxidant and TMAOH (tetramethylammonium hydroxide) as an alkaline source. CaxMnOy materials with x higher than 0.26 are composed of nanoparticles with particle sizes ranging from 15 to 30 nm according to the result of HRTEM. The results of X-ray absorption fine structure (XAFS) indicate that calcium manganese oxides have similar structural motifs to the catalytically active site for water oxidation in PSII. It was also found that the content of Ca and the concentration of H2O2 in the initial mixture could affect the crystallinity and the average Mn valence state of calcium manganese oxides. Water oxidation experiments for both chemical and photocatalytic systems suggest that the disordered structure of calcium manganese oxides and a modest valence state of Mn (+3.7 to +3.8) are necessary for achieving high activity. Our method provides a strategy for synthesis and modulation of nanostructured biomimetic water oxidation catalysts.
WOS关键词	OXYGEN-EVOLVING CENTER ; PHOTOSYSTEM-II ; BIRNESSITE ; EFFICIENT ; COMPLEX ; PHOTOSYNTHESIS ; ABSORPTION ; REDUCTION ; CENTERS ; SHAPE
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000374862600041
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/170786]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Yang, Qihua; Li, Can
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, 457 Zhongshan Rd, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Yaopeng,Rong, Feng,Zhao, Jiao,et al. Highly active water oxidation on nanostructured biomimetic calcium manganese oxide catalysts[J]. JOURNAL OF MATERIALS CHEMISTRY A,2016,4(17):6585-6594.
APA	Zhao, Yaopeng.,Rong, Feng.,Zhao, Jiao.,Chen, Zheng.,Xu, Yuxing.,...&Li, Can.(2016).Highly active water oxidation on nanostructured biomimetic calcium manganese oxide catalysts.JOURNAL OF MATERIALS CHEMISTRY A,4(17),6585-6594.
MLA	Zhao, Yaopeng,et al."Highly active water oxidation on nanostructured biomimetic calcium manganese oxide catalysts".JOURNAL OF MATERIALS CHEMISTRY A 4.17(2016):6585-6594.