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Ultrafast Electrodeposition of Ni Metal and NiFe Hydroxide Composites with Heterogeneous Nanostructures as High Performance Multifunctional Electrocatalysts
Author(s) -
Zhuang Shuxian,
Wang Linan,
Hu Hanjun,
Tang Yang,
Chen Yongmei,
Sun Yanzhi,
Mo Hengliang,
Yang Xiaojin,
Wan Pingyu,
Khan Zia Ul Haq
Publication year - 2018
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201800819
Subject(s) - tafel equation , overpotential , materials science , water splitting , alkaline water electrolysis , electrolysis , chemical engineering , oxygen evolution , hydroxide , catalysis , nickel , electrolysis of water , electrode , inorganic chemistry , electrochemistry , metallurgy , electrolyte , chemistry , biochemistry , photocatalysis , engineering
Water electrolysis provides an efficient method to produce hydrogen as clean energy source. Developing high activity electro‐catalysts towards the oxygen evolution reaction (OER) is crucial to improve the energy‐conversion efficiency of water electrolysis. In this work, heterogeneous nanostructures of NiFe hydroxide composites decorated by Ni metal were directly grown on a porous nickel foam (NF) substrate through an ultrafast electrodeposition process at a large cathodic current density of 1.5 A cm −2 within only 2 seconds. The as‐prepared Ni/NiFe (OH) x –1500 electrode offers a low OER overpotential of 240 mV at 10 mA cm −2 and 290 mV at 100 mA cm −2 , a small Tafel slope of 36 mV Dec −1 , which are superior to those of a commercial RuO 2 /Ti electrode. Moreover, Ni/NiFe (OH) x –1500 shows good stability and low cell voltage in the long‐time alkaline‐water splitting. Additionally, the Ni/NiFe (OH) x –1500 electrode also displays excellent electro‐catalytic activity toward the oxidation of hydrazine and glucose. This work provides a facile and rapid method to obtain high performance multifunctional electro‐catalysts.