Tungsten Phosphide Nanorod Arrays Directly Grown on Carbon Cloth: A Highly Efficient and Stable Hydrogen Evolution Cathode at All pH Values

We report the development of tungsten phosphide nanorod arrays on carbon cloth (WP NAs/CC) through a two-step strategy: hydrothermally growing WO3 nanorod arrays on CC (WO3 NAs/CC) first, followed by phosphidation to chemically convert the WO3 NAs/CC precursor into WP NAs/CC. As a novel integrated 3...

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Bibliographic Details
Published in:ACS applied materials & interfaces 2014-12, Vol.6 (24), p.21874-21879
Main Authors: Pu, Zonghua, Liu, Qian, Asiri, Abdullah M, Sun, Xuping
Format: Article
Language:English
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Summary:We report the development of tungsten phosphide nanorod arrays on carbon cloth (WP NAs/CC) through a two-step strategy: hydrothermally growing WO3 nanorod arrays on CC (WO3 NAs/CC) first, followed by phosphidation to chemically convert the WO3 NAs/CC precursor into WP NAs/CC. As a novel integrated 3D hydrogen evolution cathode in acidic media, the WP NAs/CC electrode exhibits excellent catalytic activity and durability. It needs overpotentials of 130 and 230 mV to afford current densities of 10 and 100 mA cm–2, respectively, and its catalytic activity is maintained for at least 70 h. Remarkably, this electrode also works efficiently in both neutral and alkaline solutions.
ISSN:1944-8244
1944-8252
DOI:10.1021/am5060178