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| Research on Preparation and OER Properties of Chromium-doped Jarosite Microspheres |
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Received:December 28, 2021
Revised:January 10, 2022
Accepted:January 14, 2022
Published Online:April 12, 2022
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| DOI：doi：10.3969/j.issn.1007-7545.2022.05.012 |
| KeyWord:jarosite; Cr3+ doping; nano-microsphere; oxygen evolution reaction |
| Author | Institution |
| CHEN Jun-xue |
桂林理工大学材料科学与工程学院 |
| QU Zi-zheng |
桂林理工大学材料科学与工程学院 |
| LI Zhong-lin |
桂林理工大学材料科学与工程学院 |
| LU Yu-long |
桂林理工大学材料科学与工程学院 |
| WANG Ding |
桂林理工大学 |
| WU Cheng-zhi |
桂林理工大学材料科学与工程学院 |
| LI Yu-ping |
桂林理工大学材料科学与工程学院 |
| HE Gui-xiang |
桂林理工大学南宁分校;桂林理工大学南宁分校 |
| LI Yi-bing |
桂林理工大学材料科学与工程学院 |
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| Abstract: |
| A series of chromium-doped jarosite nanospheres KFe3-xCrx(SO4)2(OH)6) with diverse microstructures were prepared by hydrothermal synthesis method. Microstructure and physicochemical properties of catalyst were investigated with the aid of XRD, SEM, FT-IR and Raman, and electrocatalytic oxygen evolution performance (OER) of samples were measured through electrochemical workstation. The results show that Cr3+ replaces part of Fe3+, and with the increase of the molar ratio of n(Fe3+/Cr3+), morphology of jarosite transforms from irregular nanoparticles to uniformly sized nanospheres. When n(Fe3+/Cr3+)=2, the synthesized KFe2Cr1(SO4)2(OH)6 is a nano-microsphere with smooth surface and diameter is about 450~550 nm. When the current density is 10 mA/cm2, the over potential is 362 mV and the Tafel slope is 73 mV dec-1, meanwhile, the voltage does not change significantly after 20 h of constant potential test and basically stabilized, which indicates that KFe2Cr1(SO4)2(OH)6 microsphere exhibits excellent OER catalytic performance and stability, and providing a new direction for application of jarosite. |
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