【摘 要】
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The rational design and construction of inexpensive and highly active electrocatalysts for hydrogen evo-lution reaction(HER)is of great importance for water spl
【机 构】
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Institute for Composites Science Innovation (InCSI),School of Materials Science and Engineering,Zhej
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The rational design and construction of inexpensive and highly active electrocatalysts for hydrogen evo-lution reaction(HER)is of great importance for water splitting.Herein,we develop a facile approach for preparation of porous carbon-confined Ru-doped Cu nanoparticles(denoted as Ru-Cu@C)by direct pyrol-ysis of the Ru-exchanged Cu-BTC metal-organic framework.When served as the electrocatalyst for HER,strikingly,the obtained Ru-Cu@C catalyst exhibits an ultralow overpotential(only 20 mV at 10 mA cm-2)with a small Tafel slope of 37 mV dec-1 in alkaline electrolyte.The excellent performance is comparable or even superior to that of commercial Pt/C catalyst.Density functional theory(DFT)calculations confirm that introducing Ru atoms into Cu nanocrystals can significantly alter the desorption of H2 to achieve a close-to-zero hydrogen adsorption energy and thereby boost the HER process.This strategy gives a fresh impetus to explore low-cost and high-performance catalysts for HER in alkaline media.
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