Developing an FexCoyLaz-based amorphous aerogel catalyst for the oxygen evolution reaction via high throughput synthesis

文献信息

发布日期 2023-12-07

DOI 10.1039/D3TA06211B

影响因子 12.732

作者

Bijun Cai, Zhuyang Chen, Weixuan Li, Shibo Xi, Chen Xu

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摘要

Electrochemical water splitting provides clean and sustainable hydrogen. The industrial demand for electrolysis-generated hydrogen requires efficient and affordable oxygen evolution reaction (OER) electrocatalysts. Few studies have systematically examined the synergistic impact of various elements in multi-principal-element catalysis. We developed FexCoyLaz-containing ternary amorphous aerogel electrocatalysts via high-throughput fabrication to fulfil this research need. Stoichiometric evaluation over 70 varying compounds of FexCoyLaz identified several high-performing compositions, such as Fe2Co6La2, with an ηonset of 201 mV, η10 of 209 mV, η100 of 319 mV, and Tafel slope of 49.84 mV dec−1. In addition, its catalytic stability and mass activity outperform those of a commercial catalyst, RuO2. After investigating the catalytic roles of each constituent elements in the ternary compounds via factor rating and numerical fitting, it is concluded that the valence state of Co and its evolution directly impact the catalytic activity of the ternary compound, while Fe affects the valence state of Co, and La alters the coordination environment around the active sites, improving the catalytic stability especially at high current densities. This work suggests a feasible approach to screen out high-performance non-noble-metal electrocatalysts for effective water-splitting. Furthermore, the analytic models employed in this work put forward a new path for investigating synergistic catalytic effects in multi-principal-element electrocatalysts.

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来源期刊

Journal of Materials Chemistry A

CiteScore: 19.5

自引率: 4.7%

年发文量: 2211

Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment