Ir4+-Doped NiFe LDH to expedite hydrogen evolution kinetics as a Pt-like electrocatalyst for water splitting

NiFe-layered double hydroxide (NiFe LDH) is a state-of-the-art oxygen evolution reaction (OER) electrocatalyst, yet it suffers from rather poor catalytic activity for the hydrogen evolution reaction (HER) due to its extremely sluggish water dissociation kinetics, severely restricting its application...

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Published inChemical communications (Cambridge, England) Vol. 54; no. 49; pp. 6400 - 6403
Main Authors Chen, Qian-Qian, Hou, Chun-Chao, Wang, Chuan-Jun, Yang, Xiao, Shi, Rui, Chen, Yong
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 14.06.2018
Subjects
Catalysis
catalysts
Catalytic activity
chemical reactions
dissociation
Hydrogen evolution reactions
hydrogen production
Hydroxides
Intermetallic compounds
Iron compounds
Nickel compounds
Oxygen evolution reactions
oxygen production
potassium hydroxide
Reaction kinetics
Water splitting
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Summary:NiFe-layered double hydroxide (NiFe LDH) is a state-of-the-art oxygen evolution reaction (OER) electrocatalyst, yet it suffers from rather poor catalytic activity for the hydrogen evolution reaction (HER) due to its extremely sluggish water dissociation kinetics, severely restricting its application in overall water splitting. Herein, we report a novel strategy to expedite the HER kinetics of NiFe LDH by an Ir4+-doping strategy to accelerate the water dissociation process (Volmer step), and thus this catalyst exhibits superior and robust catalytic activity for finally oriented overall water splitting in 1 M KOH requiring only a low initial voltage of 1.41 V delivering at 20 mA cm−2 for more than 50 h.
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ISSN:1359-7345
1364-548X
1364-548X
DOI:10.1039/c8cc02872a