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| Direct Spectroscopy for Probing the Critical Role of Partial Covalency in Oxygen Reduction Reaction for Cobalt-Manganese Spinel Oxides | |
| 2019-04 | |
| Source Publication | NANOMATERIALS
 |
| ISSN | 2079-4991 |
| Volume | 9Issue:4 |
| Status | 已发表 |
| DOI | 10.3390/nano9040577 |
| Abstract | Nanocrystalline multivalent metal spinels are considered as attractive non-precious oxygen electrocatalysts. Identifying their active sites and understanding their reaction mechanisms are essential to explore novel transition metal (TM) oxides catalysts and further promote their catalytic efficiency. Here we report a systematic investigation, by means of soft X-ray absorption spectroscopy (sXAS), on cubic and tetragonal CoxMn3-xO4 (x = 1, 1.5, 2) spinel oxides as a family of highly active catalysts for the oxygen reduction reaction (ORR). We demonstrate that the ORR activity for oxide catalysts primarily correlates to the partial covalency of between O 2p orbital with Mn4+ 3d t(2g)-down/e(g)-up, Mn3+ 3d e(g)-up and Co3+ 3d e(g)-up orbitals in octahedron, which is directly revealed by the O K-edge sXAS. Our findings propose the critical influences of the partial covalency between oxygen 2p band and specific metal 3d band on the competition between intermediates displacement of the ORR, and thus highlight the importance of electronic structure in controlling oxide catalytic activity. |
| Keyword | oxygen reduction reaction spinel oxides soft X-ray absorption spectroscopy partial covalency catalytic activity |
| Indexed By | SCI ; SCIE |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[21473235] ; National Natural Science Foundation of China[U1632269] ; National Natural Science Foundation of China[11227902] ; National Natural Science Foundation of China[21503263] |
| WOS Research Area | Science & Technology - Other Topics ; Materials Science |
| WOS Subject | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary |
| WOS ID | WOS:000467768800093 |
| Publisher | MDPI |
| WOS Keyword | X-RAY-ABSORPTION ; TRANSITION-METAL ; EVOLUTION REACTION ; ALKALINE-MEDIUM ; STATES ; ELECTROCATALYSIS ; FILMS ; HYBRIDIZATION ; ELECTRODES ; BATTERIES |
| Original Document Type | Article |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/40885 |
| Collection | 物质科学与技术学院_硕士生 物质科学与技术学院_特聘教授组_刘啸嵩组 |
| Corresponding Author | Liu, Xiaosong |
| Affiliation | 1.Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R China 2.Chinese Acad Sci, CAS Ctr Excellence Superconducting Elect CENSE, Shanghai 200050, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Nankai Univ, Key Lab Adv Energy Mat Chem, Minist Educ, Tianjin 300071, Peoples R China 5.Nankai Univ, Coll Chem, State Key Lab Elementoorgan Chem, Tianjin 300071, Peoples R China 6.Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA 7.Shanghai Tech Univ, Sch Phys Sci & Technol, Shanghai 200031, Peoples R China |
| Corresponding Author Affilication | School of Physical Science and Technology |
| Recommended Citation GB/T 7714 | Long, Xinghui,Yu, Pengfei,Zhang, Nian,et al. Direct Spectroscopy for Probing the Critical Role of Partial Covalency in Oxygen Reduction Reaction for Cobalt-Manganese Spinel Oxides[J]. NANOMATERIALS,2019,9(4). |
| APA | Long, Xinghui.,Yu, Pengfei.,Zhang, Nian.,Li, Chun.,Feng, Xuefei.,...&Liu, Xiaosong.(2019).Direct Spectroscopy for Probing the Critical Role of Partial Covalency in Oxygen Reduction Reaction for Cobalt-Manganese Spinel Oxides.NANOMATERIALS,9(4). |
| MLA | Long, Xinghui,et al."Direct Spectroscopy for Probing the Critical Role of Partial Covalency in Oxygen Reduction Reaction for Cobalt-Manganese Spinel Oxides".NANOMATERIALS 9.4(2019). |
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