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Published on: October 12, 2019
3d-5d Orbital Hybridization in Nanoflower-Like High-Entropy Alloy for Highly Efficient Overall Water Splitting at
Xiaolong Ma1,2, Yaojiang Zhou1, Shuang Zhang1
1Hubei Key Laboratory for Precision Synthesis of Small Molecule Pharmaceuticals, Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, P. R. China.
Abstract:
Exploring highlyefficient electrocatalysts for overall water splitting is a challenging butnecessary task for development of green and renewable energy. Herein, PtIrFeCoNi high-entropy alloy nanoflowers (HEA NFs) withstrong 3d-5d orbital hybridization were fabricated to achieve highly efficientoverall water splitting at high current density. The Pt26Ir7Fe13Co22Ni32 HEA NFs achieved a 57.52-fold higher than commercial IrO2 in turnoverfrequency (TOF) for oxygen evolution reaction (OER). Besides, its TOF value forhydrogen evolution reaction (HER) was 2.11-fold higher than that of commercialPt/C. The cell voltages based on Pt26Ir7Fe13Co22Ni32 HEA NFs for overall water splitting were only 1.594 V and 1.861 V at currentdensities of 100 mA cm-2 and 500 mA cm-2, which weresignificantly lower than those of Pt/C.
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