DICP OpenIR
Highly active water oxidation on nanostructured biomimetic calcium manganese oxide catalysts
Rong, Feng1,2; Zhao, Jiao1; Chen, Zheng1,2; Xu, Yuxing1,2; Zhao, Yaopeng1; Yang, Qihua1; Li, Can1
Source PublicationJOURNAL OF MATERIALS CHEMISTRY A
2016
ISSN2050-7488
DOI10.1039/c5ta08217j
Volume4Issue:17Pages:6585-6594
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS Research AreaChemistry ; Energy & Fuels ; Materials Science
WOS KeywordOXYGEN-EVOLVING CENTER ; PHOTOSYSTEM-II ; BIRNESSITE ; EFFICIENT ; COMPLEX ; PHOTOSYNTHESIS ; ABSORPTION ; REDUCTION ; CENTERS ; SHAPE
AbstractWater 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.
Language英语
WOS IDWOS:000374862600041
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/170787
Collection中国科学院大连化学物理研究所
Corresponding AuthorYang, Qihua; Li, Can
Affiliation1.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
Recommended Citation
GB/T 7714
Rong, Feng,Zhao, Jiao,Chen, Zheng,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 Rong, Feng.,Zhao, Jiao.,Chen, Zheng.,Xu, Yuxing.,Zhao, Yaopeng.,...&Li, Can.(2016).Highly active water oxidation on nanostructured biomimetic calcium manganese oxide catalysts.JOURNAL OF MATERIALS CHEMISTRY A,4(17),6585-6594.
MLA Rong, Feng,et al."Highly active water oxidation on nanostructured biomimetic calcium manganese oxide catalysts".JOURNAL OF MATERIALS CHEMISTRY A 4.17(2016):6585-6594.
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