摘要
A stable and efficient oxygen evolution reaction(OER)electrocatalyst in acidic medium is strongly required for the industrialization of polymer electrolyte membrane water splitting(PEMWS)technology.Herein,we devise the formation of nanoneedle-like RuO_(2)/V_(2)O_(5)heterostructure with the template of MIL 88B.The incorporation of V_(2)O_(5)to RuO_(2)significantly increases the deprotonation capability resulting in a better OER performance demanding 216mV overpotential at 10 mA/cm^(2),lowered by 27mV with relative to benchmarked RuO_(2).Moreover,the electronic interplay between RuO_(2)and V_(2)O_(5)contributes to an increment in oxidation of Ru to high valance state;thereby,a robust stability is achieved for RuO_(2)/V_(2)O_(5).From the theoretical calculation,it is noticed that the d band center of Ru is downshifted after V_(2)O_(5)decoration;moreover,the e_(g)filling of Ru is simultaneously increased;in this regard,the adsorption of OH^(∗)specie is weakened,in accordance to methanol detection,resulting in a higher OER performance.
基金
supported by the National Natural Science Foundation of China(No.22209126)
the Opening Project of Key Laboratory of Optoelectronic Chemical Materials and Devices,Ministry of Education,Jianghan University(No.JDGD-202314)。
