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Indexed by:期刊论文

Date of Publication:2017-11-23

Journal:ChemSusChem

Included Journals:SCIE、EI

Volume:10

Issue:22

Page Number:4472-4478

Key Words:artificial photosynthesis; electrochemistry; manganese; turbostratic manganese oxide; water oxidation

Abstract:The development of manganese-based water oxidation electrocatalysts is desirable for the production of solar fuels, as manganese is earth-abundant, inexpensive, non-toxic, and has been employed by the Photosystem II in nature for a billion years. Herein, we directly constructed a 3D nanoarchitectured turbostratic delta-MnOx on carbon nanotube-modified nickel foam (MnOx/CNT/NF) by electrodeposition and a subsequent annealing process. The MnOx/CNT/NF electrode gives a benchmark catalytic current density (10 mA cm(-2)) at an overpotential (h) of 270 mV under alkaline conditions. A steady current density of 19 mAcm(-2) is obtained during electrolysis at 1.53 V for 1.0 h. To the best of our knowledge, this work represents the most efficient manganese-oxide-based water oxidation electrode and demonstrates that manganese oxides, as a structural and functional model of oxygen-evolving complex (OEC) in Photosystem II, can also become comparable to those of most Niand Co-based catalysts.