Ting Zhu, Yu-Hao Wang, Teng Sun, Ye-Can Pi, Xiao-Dong Pi, Jun Xu, Kun-Ji Chen
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d-orbital charge density regulation of SiOx/RuCoOx nanoparticles to boost water splitting in acidic media
Hydrogen has emerged as a promising clean energy carrier, and the development of cost-effective electrocatalysts that retain high activity under acidic media is crucial for advancing proton exchange membrane water electrolysis (PEMWE). Here, we propose the SiOx/RuCoOx nanoparticles (SiOx/RuCoOx NPs) as bifunctional electrocatalysts for efficient hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) under acidic media. The Ru-O-Si interface, along with charge transfer between Ru and Co, modulates the d-band electronic structure of the Ru site, achieving superior performance with a low HER overpotential of 18 mV at 10 mA·cm−2 and a turnover frequency of 8.86 H2·s−1 at 100 mV. For OER, the overpotential is 217 mV at 10 mA·cm−2. SiOx/RuCoOx NPs exhibit a cell voltage of 1.482 V at 10 mA·cm−2 with an energy conversion efficiency of 83.0%. This work takes a significant step toward achieving efficient and cost-effective bifunctional electrocatalysts for water splitting, playing a critical role in the transition to clean energy technologies.
期刊介绍：
Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.
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