A top-down strategy for amorphization of hydroxyl compounds for electrocatalytic oxygen evolution

Shangheng Liu, Shize Geng, Ling Li, Ying Zhang, Guomian Ren, Bolong Huang (), Zhiwei Hu, Jyh-Fu Lee, Yu-Hong Lai, Ying-Hao Chu, Yong Xu (), Qi Shao and Xiaoqing Huang ()
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Shangheng Liu: Xiamen University
Shize Geng: Soochow University
Ling Li: Soochow University
Ying Zhang: Xiamen University
Guomian Ren: Guangdong University of Technology
Bolong Huang: The Hong Kong Polytechnic University, Hung Hom
Zhiwei Hu: Max Planck Institute for Chemical Physics of Solids
Jyh-Fu Lee: National Synchrotron Radiation Research Center
Yu-Hong Lai: National Yang Ming Chiao Tung University
Ying-Hao Chu: National Yang Ming Chiao Tung University
Yong Xu: Guangdong University of Technology
Qi Shao: Soochow University
Xiaoqing Huang: Xiamen University

Nature Communications, 2022, vol. 13, issue 1, 1-10

Abstract: Abstract Amorphous materials have attracted increasing attention in diverse fields due to their unique properties, yet their controllable fabrications still remain great challenges. Here, we demonstrate a top-down strategy for the fabrications of amorphous oxides through the amorphization of hydroxides. The versatility of this strategy has been validated by the amorphizations of unitary, binary and ternary hydroxides. Detailed characterizations indicate that the amorphization process is realized by the variation of coordination environment during thermal treatment, where the M–OH octahedral structure in hydroxides evolves to M–O tetrahedral structure in amorphous oxides with the disappearance of the M–M coordination. The optimal amorphous oxide (FeCoSn(OH)6-300) exhibits superior oxygen evolution reaction (OER) activity in alkaline media, where the turnover frequency (TOF) value is 39.4 times higher than that of FeCoSn(OH)6. Moreover, the enhanced OER performance and the amorphization process are investigated with density functional theory (DFT) and molecule dynamics (MD) simulations. The reported top-down fabrication strategy for fabricating amorphous oxides, may further promote fundamental research into and practical applications of amorphous materials for catalysis.

Date: 2022
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DOI: 10.1038/s41467-022-28888-3

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