Tuning the surface energy density of non-stoichiometric LaCoO3 perovskite for enhanced water oxidation
文献类型：期刊论文
| 作者 | Wang, Y; Shen, XJ; Arandiyan, H; Yin, YT; Sun, FF; Chen, XJ; Garbrecht, M; Han, L; Andersson, GG; Zhao, C |
| 刊名 | JOURNAL OF POWER SOURCES
 |
| 出版日期 | 2020 |
| 卷号 | 478页码:- |
| 关键词 | EVOLUTION REACTION ACTIVITY OXYGEN EVOLUTION EFFICIENT PERFORMANCE CATALYSIS VACANCIES ELECTROCATALYSIS REDUCTION STATE OXIDE |
| ISSN号 | 0378-7753 |
| DOI | 10.1016/j.jpowsour.2020.228748 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Tailoring the surface structure of Earth-abundant perovskite oxides can provide cost-effective, high-efficient, and durable electrocatalysts for oxygen evolution reaction (OER). However, the structural origin leading to high OER performance of perovskite is not fully understood. Here, we present a strategy of tuning the surface energy density of non-stoichiometric perovskite by creating surface defects in the 3D inverse opal LaCoO3-x (3DIO-LaCoO3-x) through a colloidal template strategy. The defective 3DIO-LaCoO3-x, which has an enhanced surface energy density and a shift in the d-band centre of Co relative to the Fermi level, demonstrates significantly improved intrinsic OER activity, with a TOF (0.21 s(-1)) ten-folder larger than that of conventional LaCoO3 nanoparticles (0.02 s(-1)). The defective surfaces of 3DIO-LaCoO3-x are theoretically proven to alter the rate determining step of OER and significantly reduce the adsorption energies of the intermediate species, resulting in dramatically enhanced OER activity. Moreover, rich surface defects with high electrical conductivity can mitigate structural corrosion by fast transfer of charge through defective conductive channels, and thus enables longterm stability for the defective 3DIO-LaCoO3-x. These results provide an effective approach for enhancing the intrinsic activity of perovskite for water oxidation towards understanding the surface structure engineering for perovskite-based materials. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/33231]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201204, Peoples R China 2.Zhengzhou Univ, Sch Ecol & Environm, Zhengzhou 450001, Peoples R China 3.Univ New South Wales, Fac Sci, Sch Chem, Sydney, NSW, Australia 4.Zhengzhou Univ, Coll Chem Engn, Zhengzhou 450001, Peoples R China 5.Univ Sydney, Sch Chem, Lab Adv Catalysis Sustainabil, Sydney, NSW 2006, Australia 6.Flinders Univ S Australia, Flinders Inst Nanoscale Sci & Technol, Adelaide, SA 5042, Australia 7.Flinders Univ S Australia, Coll Sci & Engn, Flinders Microscopy & Microanal, Adelaide, SA 5042, Australia 8.Univ Sydney, Australian Ctr Microscopy & Microanal, Sydney, NSW 2006, Australia |
| 推荐引用方式 GB/T 7714 | Wang, Y,Shen, XJ,Arandiyan, H,et al. Tuning the surface energy density of non-stoichiometric LaCoO3 perovskite for enhanced water oxidation[J]. JOURNAL OF POWER SOURCES,2020,478:-. |
| APA | Wang, Y.,Shen, XJ.,Arandiyan, H.,Yin, YT.,Sun, FF.,...&Zhao, C.(2020).Tuning the surface energy density of non-stoichiometric LaCoO3 perovskite for enhanced water oxidation.JOURNAL OF POWER SOURCES,478,-. |
| MLA | Wang, Y,et al."Tuning the surface energy density of non-stoichiometric LaCoO3 perovskite for enhanced water oxidation".JOURNAL OF POWER SOURCES 478(2020):-. |
入库方式： OAI收割
来源：上海应用物理研究所
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