Abstract
| Original language | English |
|---|---|
| Number of pages | 7 |
| Journal | New Journal of Chemistry |
| Volume | 41 |
| Issue number | 10 |
| Early online date | 18 Apr 2017 |
| DOIs | |
| Publication status | Published - 21 May 2017 |
| Externally published | Yes |
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Highly active Ni–Fe double hydroxides as anode catalysts for electrooxidation of urea. / Xu, Wei; Du, Dongwei; Lan, Rong; Humphreys, John; Wu, Zucheng; Tao, Shanwen .
In: New Journal of Chemistry, Vol. 41, No. 10, 21.05.2017.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Highly active Ni–Fe double hydroxides as anode catalysts for electrooxidation of urea
AU - Xu, Wei
AU - Du, Dongwei
AU - Lan, Rong
AU - Humphreys, John
AU - Wu, Zucheng
AU - Tao, Shanwen
PY - 2017/5/21
Y1 - 2017/5/21
N2 - Urea is a safe and sustainable chemical for electrochemical energy conversion and storage. However, the sluggish kinetic rates of the electrooxidation reaction of urea as well as catalyst stability still remain to be challenges. In this work, we investigated several catalysts for the electro-oxidation of urea by directly growing NiM double hydroxides (M = Cr, Mn, Fe, Co, Cu, Zn) on carbon fibre cloth and nickel foam electrodes through a facile one-step hydrothermal synthesis method. The results indicated that the activity was significantly related to the elemental composition. Among the investigated double hydroxides, the NiFe double hydroxide (DH) catalyst showed the highest activity, which achieved a specific current density of ∼95 mA cm−2 mg−1 at 0.5 V vs. Ag/AgCl, about 10 times larger than that of Ni(OH)2. In addition, the NiFe DH also had a high activity when grown on a Ni foam substrate. This NiFe DH performs well in the aspect of urea oxidation stability, demonstrating it to be a promising low-cost and stable catalyst for the efficient electrooxidation of urea under alkaline conditions.
AB - Urea is a safe and sustainable chemical for electrochemical energy conversion and storage. However, the sluggish kinetic rates of the electrooxidation reaction of urea as well as catalyst stability still remain to be challenges. In this work, we investigated several catalysts for the electro-oxidation of urea by directly growing NiM double hydroxides (M = Cr, Mn, Fe, Co, Cu, Zn) on carbon fibre cloth and nickel foam electrodes through a facile one-step hydrothermal synthesis method. The results indicated that the activity was significantly related to the elemental composition. Among the investigated double hydroxides, the NiFe double hydroxide (DH) catalyst showed the highest activity, which achieved a specific current density of ∼95 mA cm−2 mg−1 at 0.5 V vs. Ag/AgCl, about 10 times larger than that of Ni(OH)2. In addition, the NiFe DH also had a high activity when grown on a Ni foam substrate. This NiFe DH performs well in the aspect of urea oxidation stability, demonstrating it to be a promising low-cost and stable catalyst for the efficient electrooxidation of urea under alkaline conditions.
U2 - 10.1039/C6NJ04060H
DO - 10.1039/C6NJ04060H
M3 - Article
VL - 41
JO - New Journal of Chemistry
JF - New Journal of Chemistry
SN - 1144-0546
IS - 10
ER -