Cited 3 time in webofscience Cited 2 time in scopus

Insight into the Boosted Electrocatalytic Oxygen Evolution Performance of Highly Hydrophilic Nickel-Iron Hydroxide

Title
Insight into the Boosted Electrocatalytic Oxygen Evolution Performance of Highly Hydrophilic Nickel-Iron Hydroxide
Authors
Wei, YiShin, Cheol-HwanTetteh, Emmanuel BatsaLee, Byong-JuneYu, Jong-Sung
DGIST Authors
Yu, Jong-Sung
Issue Date
2020-01
Citation
ACS Applied Energy Materials, 3(1), 822-830
Type
Article
Article Type
Article
Author Keywords
nickel-iron hydroxidebinder-freeimmersion methodhydrophilicityoxygen evolution reaction
Keywords
WATER OXIDATIONCATALYTIC-ACTIVITYFE-SITESNI FOAMEFFICIENTGRAPHENENANOSHEETSELECTRODESPHERESHYBRID
ISSN
2574-0962
Abstract
Nickel-iron based materials are well-known catalysts for the oxygen evolution reaction (OER) and have been widely investigated. However, the synergy between these two components is still controversial. Herein, we report a facile immersion method for the synthesis of binder-free nickel-iron hydroxide loaded on Ni foam (NiFe-OH/NF) with superior hydrophilic property and high OER catalytic activity. The strong hydrophilic property of the binder-free NiFe-OH/NF electrode significantly enhances an effective contact between electrocatalyst and aqueous electrolyte and favors the bubble detachment from the electrode, facilitating the electron transfer and improving the OER activity. The hydrophilic NiFe-OH/NF can achieve a geometrical current density of 100 mA cm-1 at an extremely low overpotential (219 mV), along with a Tafel slope of 56 mV dec-1 and superior long-term stability at high current density in alkaline media, strongly indicating that the hydrophilicity plays an important role in improving the OER performance in the NiFe-OH/NF. Copyright © 2019 American Chemical Society.
URI
http://hdl.handle.net/20.500.11750/11543
DOI
10.1021/acsaem.9b01952
Publisher
American Chemical Society
Related Researcher
  • Author Yu, Jong-Sung Light, Salts and Water Research Group
  • Research Interests Materials chemistry; nanomaterials; electrochemistry; carbon and porous materials; fuel cell; battery; supercapacitor; sensor and photochemical catalyst
Files:
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Collection:
Department of Energy Science and EngineeringLight, Salts and Water Research Group1. Journal Articles


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