Journal
NANOTECHNOLOGY
Volume 34, Issue 27, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1361-6528/acca23
Keywords
nanosheets array; heterojunction; interface engineering; electrocatalyst; water splitting
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The design of electrocatalysts with excellent activity and stability for overall water splitting is highly desirable, and remains a challenge. Constructing heterojunctions onto the same substrate is beneficial for the integration of a water-splitting reaction. In this study, self-supported IrNi/Ni(OH)(2)@PPy and IrNi/Ni(OH)(2)@FeOOH catalysts were fabricated, which can efficiently drive the hydrogen evolution reaction and oxygen evolution reaction, respectively. Moreover, the electrolyzer consisting of these catalysts requires only a low cell voltage of 1.49 V to deliver 10 mA cm(-2). This study provides a useful strategy for constructing efficient electrocatalysts through synergistic composition modulation and interface engineering.
The design of electrocatalysts with excellent activity and stability for overall water splitting is highly desirable, and remains a challenge. Constructing heterojunctions onto the same substrate is beneficial for the integration of a water-splitting reaction. Herein, self-supported IrNi/Ni(OH)(2)@PPy and IrNi/Ni(OH)(2)@FeOOH are fabricated by coupling polypyrrole (PPy) and iron oxyhydroxide (FeOOH) on IrNi/Ni(OH)(2) nanosheets array, respectively. Benefiting from the nanosheet structure, composition, and heterogeneous interface, the as-constructed IrNi/Ni(OH)(2)@PPy and IrNi/Ni(OH)(2)@FeOOH catalysts can efficiently drive the hydrogen evolution reaction and oxygen evolution reaction, respectively. Moreover, the electrolyzer consisting of IrNi/Ni(OH)(2)@PPy and IrNi/Ni(OH)(2)@FeOOH for water splitting requires only a low cell voltage of 1.49 V to deliver 10 mA cm(-2). This study provides a useful strategy for constructing efficient electrocatalysts by synergistic composition modulation and interface engineering.
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