Xuefeng Wang, Zijian Li, Haeseong Jang, Changsheng Chen, Shangguo Liu, Liu Wang, Min Gyu Kim, Jaephil Cho, Qing Qin, Xien Liu
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引用次数: 0
Abstract
Ruthenium Dioxide (RuO2), as one of the most promising alternatives to IrO2, suffers from the severe dissolution and overoxidation of Ru active sites during the acidic oxygen evolution reaction (OER), which hinders its practical application. Herein, the study constructs a short-range ordered tantalum single atoms-doped RuO2 catalyst (Ta-RuO2) with asymmetric Ru-O-Ta(-O-Ta) active units for the enhanced acidic OER. The Ta-RuO2 catalyst exhibits superior catalytic activity with an overpotential of 201 mV at 10 mA cm−2 and a long-lasting stability of 280 h. Physical characterizations combined with electrochemical tests reveal that the incorporation of atomically arranged Ta atoms induces significant tensile strain, effectively optimizing the adsorption strength of oxygen-containing intermediates by regulating the Ru d-band center and weakening the Ru-O covalency, thus boosting the catalytic activity. Furthermore, the formed Ru-O-Ta(-O-Ta) active local structure is well maintained during the OER process owing to the synergy of strong corrosion resistance of Ta-O bonds and the electron transfers from Ta to Ru via oxygen bridge stabilizing the Ru sites, contributing to the enhanced stability. This study provides a novel method via incorporation of corrosion-resistant and short-range ordered single atoms to significantly enhance the acidic OER stability and activity of cost-effective catalysts.
期刊介绍:
Established in 2011, Advanced Energy Materials is an international, interdisciplinary, English-language journal that focuses on materials used in energy harvesting, conversion, and storage. It is regarded as a top-quality journal alongside Advanced Materials, Advanced Functional Materials, and Small.
With a 2022 Impact Factor of 27.8, Advanced Energy Materials is considered a prime source for the best energy-related research. The journal covers a wide range of topics in energy-related research, including organic and inorganic photovoltaics, batteries and supercapacitors, fuel cells, hydrogen generation and storage, thermoelectrics, water splitting and photocatalysis, solar fuels and thermosolar power, magnetocalorics, and piezoelectronics.
The readership of Advanced Energy Materials includes materials scientists, chemists, physicists, and engineers in both academia and industry. The journal is indexed in various databases and collections, such as Advanced Technologies & Aerospace Database, FIZ Karlsruhe, INSPEC (IET), Science Citation Index Expanded, Technology Collection, and Web of Science, among others.