Boosting Oxygen Evolution Reaction by Creating Both Metal Ion and Lattice-Oxygen Active Sites in a Complex Oxide.

Autor: Zhu Y; Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing, 210009, P. R. China.; Department of Chemical Engineering, Monash University, Clayton, Victoria, 3800, Australia., Tahini HA; Department of Applied Mathematics, Research School of Physics and Engineering, Australian National University, Canberra, 2601, Australia., Hu Z; Max Planck Institute for Chemical Physics of Solids, Nothnitzer Strasse 40, Dresden, 01187, Germany., Chen ZG; Centre for Future Materials, University of Southern Queensland, Springfield, Queensland, 4300, Australia.; Materials Engineering, The University of Queensland, Brisbane, Queensland, 4072, Australia., Zhou W; Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing, 210009, P. R. China., Komarek AC; Max Planck Institute for Chemical Physics of Solids, Nothnitzer Strasse 40, Dresden, 01187, Germany., Lin Q; Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing, 210009, P. R. China., Lin HJ; National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu, 30076, Taiwan., Chen CT; National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu, 30076, Taiwan., Zhong Y; Department of Chemical Engineering, Curtin University, Perth, Western Australia, 6845, Australia., Fernández-Díaz MT; Institut Laue-Langevin (ILL), 71 avenue des Martyrs, F-38042, Grenoble, Cedex 9, France., Smith SC; Department of Applied Mathematics, Research School of Physics and Engineering, Australian National University, Canberra, 2601, Australia., Wang H; Department of Chemical Engineering, Monash University, Clayton, Victoria, 3800, Australia., Liu M; Center for Innovative Fuel Cell and Battery Technologies, School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0245, USA., Shao Z; Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing, 210009, P. R. China.; Department of Chemical Engineering, Curtin University, Perth, Western Australia, 6845, Australia.
Jazyk: angličtina
Zdroj: Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2020 Jan; Vol. 32 (1), pp. e1905025. Date of Electronic Publication: 2019 Nov 12.
DOI: 10.1002/adma.201905025
Abstrakt: Developing efficient and low-cost electrocatalysts for the oxygen evolution reaction (OER) is of paramount importance to many chemical and energy transformation technologies. The diversity and flexibility of metal oxides offer numerous degrees of freedom for enhancing catalytic activity by tailoring their physicochemical properties, but the active site of current metal oxides for OER is still limited to either metal ions or lattice oxygen. Here, a new complex oxide with unique hexagonal structure consisting of one honeycomb-like network, Ba 4 Sr 4 (Co 0.8 Fe 0.2 ) 4 O 15 (hex-BSCF), is reported, demonstrating ultrahigh OER activity because both the tetrahedral Co ions and the octahedral oxygen ions on the surface are active, as confirmed by combined X-ray absorption spectroscopy analysis and theoretical calculations. The bulk hex-BSCF material synthesized by the facile and scalable sol-gel method achieves 10 mA cm -2 at a low overpotential of only 340 mV (and small Tafel slope of 47 mV dec -1 ) in 0.1 m KOH, surpassing most metal oxides ever reported for OER, while maintaining excellent durability. This study opens up a new avenue to dramatically enhancing catalytic activity of metal oxides for other applications through rational design of structures with multiple active sites.
(© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Databáze: MEDLINE
Externí odkaz: