Bio‐Inspired Synthesis of Hematite Mesocrystals by Using Xonotlite Nanowires as Growth Modifiers and Their Improved Oxygen Evolution Activity

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2019
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Liu, Yang-Yi
Chang, Fu-Jia
Gao, Huai-Ling
Chen, Si-Ming
Gao, Min-Rui
Zheng, Ya-Rong
He, Chuan-Xin
Yu, Shu-Hong
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Bio-inspired synthesis of functional materials with highly ordered structure and tunable properties is of particular interest, but efficient approaches that allow the access of these materials are still limited. We describe here a novel method for the preparation of hematite particles by using xonotlite nanowires (XNWs) as growth modifiers. The concentration of the XNWs has a profound effect on the final morphology of the products, while the concentration of the iron(III) ions can significantly control the size of the hematite particles. Moreover, the underlying mechanism of such XNWs modified bioinspired mineralization process has been proposed. Remarkably, the obtained hematite particles exhibit good oxygen evolution reaction (OER) catalytic performance. They can afford a current density of 10 mA cm-2 with an overpotential of 370 mV, a small Tafel slope of 65 mV decade-1 and show good stability in alkaline electrolyte. Such strategy preparing functional materials by using nanowires as the growth modifiers can be applied for constructing various materials with hierarchical structures and excellent performance in the future.

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540 Chemie
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bio-inspired, xonotlite nanowires, hematite mesocrystals, formation mechanism, catalytic activity for oxygen evolution
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ISO 690LIU, Yang-Yi, Fu-Jia CHANG, Huai-Ling GAO, Si-Ming CHEN, Min-Rui GAO, Ya-Rong ZHENG, Helmut CÖLFEN, Chuan-Xin HE, Shu-Hong YU, 2019. Bio‐Inspired Synthesis of Hematite Mesocrystals by Using Xonotlite Nanowires as Growth Modifiers and Their Improved Oxygen Evolution Activity. In: ChemSusChem. 2019, 12(16), pp. 3747-3752. ISSN 1864-5631. eISSN 1864-564X. Available under: doi: 10.1002/cssc.201900861
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@article{Liu2019-08-22BioIn-46526,
  year={2019},
  doi={10.1002/cssc.201900861},
  title={Bio‐Inspired Synthesis of Hematite Mesocrystals by Using Xonotlite Nanowires as Growth Modifiers and Their Improved Oxygen Evolution Activity},
  number={16},
  volume={12},
  issn={1864-5631},
  journal={ChemSusChem},
  pages={3747--3752},
  author={Liu, Yang-Yi and Chang, Fu-Jia and Gao, Huai-Ling and Chen, Si-Ming and Gao, Min-Rui and Zheng, Ya-Rong and Cölfen, Helmut and He, Chuan-Xin and Yu, Shu-Hong}
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