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Synthesis of high crystalline nickel‐iron hydrotalcite‐like compound as an efficient electrocatalyst for oxygen evolution reaction
Author(s) -
Zhang Zejie,
Zhou Debi,
Liao Jingjing,
Bao Xinjun,
Yu Huazhang
Publication year - 2019
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.4359
Subject(s) - hydrotalcite , hydroxide , oxygen evolution , electrocatalyst , coprecipitation , catalysis , nickel , materials science , lamellar structure , potassium hydroxide , inorganic chemistry , electrolyte , chemical engineering , chemistry , electrode , electrochemistry , metallurgy , organic chemistry , engineering
Summary The nickel‐iron hydroxide‐like catalyst for oxygen evolution reaction (OER) is prepared by an improved coprecipitation method. The crystallization degree of hydrotalcite‐like compound is high, and the lamellar structure is homogeneous with no agglomeration, which helps to build efficient mass‐transfer layer channel of OH ions. The NiFe layered double hydroxide (LDH)/carbon nanotubes (CNTs) electrode shows good performance and stability for OER. The potential of NiFe LDH/CNTs electrode is only 0.592 V (vs HgO/Hg) at 200 mA·cm −2 in 6 mol·L −1 potassium hydroxide (KOH) electrolyte, which shows excellent catalytic activity for OER. The NiFe LDH/CNTs electrode works continuously for 620 hours at 200 mA·cm −2 , with the groove voltage only rises 0.1 V.