NDLI: High-performance urea electrolysis towards less energy-intensive electrochemical hydrogen production using a bifunctional catalyst electrode

Content Provider	Royal Society of Chemistry (RSC)
Author	Liu, Danni Zhang, Lixue Liu, Tingting Sun, Xuping Qu, Fengli Asiri, Abdullah M. Du, Gu
Copyright Year	2017
Abstract	It is highly desirable but still remains a big challenge to develop earth-abundant bifunctional catalysts for urea oxidation and hydrogen evolution electrocatalysis towards more energy-efficient electrolytic hydrogen generation. In this study, we report that nickel phosphide nanoflake arrays on carbon cloth (Ni2P NF/CC) behave as a highly-active durable 3D catalyst electrode for the urea oxidation reaction (UOR) with the required potential of 0.447 V to achieve a geometrical catalytic current density of 100 mA cm−2 in a 1.0 M KOH with 0.5 M urea. Remarkably, the high hydrogen evolution reaction (HER) activity of Ni2P NF/CC enables it to be a bifunctional catalyst for both the UOR and HER towards energy-saving electrochemical hydrogen production, and its two-electrode alkaline electrolyzer requires a cell voltage of only 1.35 V to attain 50 mA cm−2, which is 0.58 V less compared with that required for pure water splitting to achieve the same current density, with remarkable long-term electrochemical durability and nearly 100% Faradaic efficiency for hydrogen evolution.
Starting Page	3208
Ending Page	3213
Page Count	6
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	5
Issue Number	7
Journal	Journal of Materials Chemistry A
DOI	10.1039/c6ta11127k
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Urea Hydrogen Nickel Phosphide Nano flake Carbon Three-dimensional space Electrode Electric current Bifunctional catalyst Electrochemistry Water splitting
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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