Enhanced oxygen evolution performance by the partial phase transformation of cobalt/nickel carbonate hydroxide nanosheet arrays in an Fe-containing alkaline electrolyte

Jinghua Liu; Hualan Li; Jiayang Cai; Jingyan Liu; Yansheng Liu; Zijun Sun; Xiong He; Dezhi Qu; Xin Li

doi:10.1039/d1qi01558c

Enhanced oxygen evolution performance by the partial phase transformation of cobalt/nickel carbonate hydroxide nanosheet arrays in an Fe-containing alkaline electrolyte

Jinghua Liu
, Hualan Li
, Jiayang Cai
, Jingyan Liu
, Yansheng Liu
, Zijun Sun
, Xiong He^*
, Dezhi Qu^*
, Xin Li^*

^*Corresponding author for this work

Guangxi University of Technology
School of Chemistry and Chemical Engineering, Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

Herein, we employ a partial phase conversion strategy to transform cobalt/nickel carbonate hydroxide (Co_xNi_yCH) nanosheet arrays in an Fe-containing KOH electrolyte. The optimized sample exhibits remarkable electrocatalytic activity (η₅₀ = 256 mV, 51 mV dec⁻¹) and good stability (18 h) with negligible morphology change in a 1 M KOH solution, outperforming most reported cobalt-nickel-based electrocatalysts. From our research, it is found that the Fe impurity in the KOH electrolyte plays an important role in achieving high OER performance. The heterostructure caused by the partial phase transformation of Co_xNi_yCH can enhance the conductivity and stability along with providing more effective active sites.

Original language	English
Pages (from-to)	1819-1829
Number of pages	11
Journal	Inorganic Chemistry Frontiers
Volume	9
Issue number	8
DOIs	https://doi.org/10.1039/d1qi01558c
State	Published - 1 Mar 2022
Externally published	Yes

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title = "Enhanced oxygen evolution performance by the partial phase transformation of cobalt/nickel carbonate hydroxide nanosheet arrays in an Fe-containing alkaline electrolyte",

abstract = "Herein, we employ a partial phase conversion strategy to transform cobalt/nickel carbonate hydroxide (CoxNiyCH) nanosheet arrays in an Fe-containing KOH electrolyte. The optimized sample exhibits remarkable electrocatalytic activity (η50 = 256 mV, 51 mV dec−1) and good stability (18 h) with negligible morphology change in a 1 M KOH solution, outperforming most reported cobalt-nickel-based electrocatalysts. From our research, it is found that the Fe impurity in the KOH electrolyte plays an important role in achieving high OER performance. The heterostructure caused by the partial phase transformation of CoxNiyCH can enhance the conductivity and stability along with providing more effective active sites.",

author = "Jinghua Liu and Hualan Li and Jiayang Cai and Jingyan Liu and Yansheng Liu and Zijun Sun and Xiong He and Dezhi Qu and Xin Li",

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doi = "10.1039/d1qi01558c",

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T1 - Enhanced oxygen evolution performance by the partial phase transformation of cobalt/nickel carbonate hydroxide nanosheet arrays in an Fe-containing alkaline electrolyte

AU - Liu, Jinghua

AU - Li, Hualan

AU - Cai, Jiayang

AU - Liu, Jingyan

AU - Liu, Yansheng

AU - Sun, Zijun

AU - He, Xiong

AU - Qu, Dezhi

AU - Li, Xin

PY - 2022/3/1

Y1 - 2022/3/1

N2 - Herein, we employ a partial phase conversion strategy to transform cobalt/nickel carbonate hydroxide (CoxNiyCH) nanosheet arrays in an Fe-containing KOH electrolyte. The optimized sample exhibits remarkable electrocatalytic activity (η50 = 256 mV, 51 mV dec−1) and good stability (18 h) with negligible morphology change in a 1 M KOH solution, outperforming most reported cobalt-nickel-based electrocatalysts. From our research, it is found that the Fe impurity in the KOH electrolyte plays an important role in achieving high OER performance. The heterostructure caused by the partial phase transformation of CoxNiyCH can enhance the conductivity and stability along with providing more effective active sites.

AB - Herein, we employ a partial phase conversion strategy to transform cobalt/nickel carbonate hydroxide (CoxNiyCH) nanosheet arrays in an Fe-containing KOH electrolyte. The optimized sample exhibits remarkable electrocatalytic activity (η50 = 256 mV, 51 mV dec−1) and good stability (18 h) with negligible morphology change in a 1 M KOH solution, outperforming most reported cobalt-nickel-based electrocatalysts. From our research, it is found that the Fe impurity in the KOH electrolyte plays an important role in achieving high OER performance. The heterostructure caused by the partial phase transformation of CoxNiyCH can enhance the conductivity and stability along with providing more effective active sites.

UR - https://www.scopus.com/pages/publications/85126924975

U2 - 10.1039/d1qi01558c

DO - 10.1039/d1qi01558c

M3 - 文章

AN - SCOPUS:85126924975

SN - 2052-1545

VL - 9

SP - 1819

EP - 1829

JO - Inorganic Chemistry Frontiers

JF - Inorganic Chemistry Frontiers

IS - 8

ER -

Enhanced oxygen evolution performance by the partial phase transformation of cobalt/nickel carbonate hydroxide nanosheet arrays in an Fe-containing alkaline electrolyte

Abstract

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