Nickel confined in 2D earth-abundant oxide layers for highly efficient and durable oxygen evolution catalysts

Yayun Pu; Matthew J. Lawrence; Veronica Celorrio; Qi Wang; Meng Gu; Zongzhao Sun; Leonardo Agudo Jácome; Andrea E. Russell; Limin Huang; Paramaconi Rodriguez

doi:10.1039/d0ta04031b

Nickel confined in 2D earth-abundant oxide layers for highly efficient and durable oxygen evolution catalysts

Yayun Pu
, Matthew J. Lawrence
, Veronica Celorrio
, Qi Wang
, Meng Gu
, Zongzhao Sun
, Leonardo Agudo Jácome
, Andrea E. Russell
, Limin Huang^*
, Paramaconi Rodriguez^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

9 Citations (Scopus)

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Abstract

Low cost, high-efficiency catalysts towards water splitting are urgently required to fulfil the increasing demand for energy. In this work, low-loading (<20 wt%) Ni-confined in layered metal oxide anode catalysts (birnessite and lepidocrocite titanate) have been synthesized by facile ion exchange methodology and subjected to systematic electrochemical studies. It was found that Ni-intercalated on K-rich birnessite (Ni-KMO) presents an onset overpotential (η_onset) as low as 100 mV and overpotential at 10 mA cm-2 (η₁₀) of 206 mV in pH = 14 electrolyte. By combining electrochemical methods and X-ray absorption and emission spectroscopies (XAS and XES), we demonstrate Ni sites are the active sites for OER catalysis and that the Mn³⁺ sites facilitate Ni intercalation during the ion-exchange process, but display no observable contribution towards OER activity. The effect of the pH and the nature of the supporting electrolyte on the electrochemical performance was also evaluated. © 2020 The Royal Society of Chemistry.

Original language	English
Pages (from-to)	13340-13350
Number of pages	11
Journal	Journal of Materials Chemistry A
Volume	8
Issue number	26
Online published	22 Jun 2020
DOIs	https://doi.org/10.1039/d0ta04031b
Publication status	Published - 14 Jul 2020
Externally published	Yes

Funding

This work was financially supported by Southern University of Science and Technology (SUSTech) start fund through Shenzhen Peacock Talent program, Guangdong Innovative and Entrepreneurial Research Team Program (No. 2016ZT06N532), Guangdong Provincial Key Laboratory of Materials for Electric Power (2018B030322001) and Shenzhen Clean Energy Research Institute (CERI-KY-2019-003). P. R. acknowledges the University of Birmingham for financial support through the Birmingham fellowship program. This work was also supported by the Pico Center at SUSTech that receives support from Presidential fund and Development and Reform Commission of Shenzhen Municipality. The authors wish to acknowledge the Diamond Light Source for provision of beamtime (SP21659 and SP19850).

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This full text is made available under CC-BY-NC 4.0. https://creativecommons.org/licenses/by-nc/4.0/

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title = "Nickel confined in 2D earth-abundant oxide layers for highly efficient and durable oxygen evolution catalysts",

abstract = "Low cost, high-efficiency catalysts towards water splitting are urgently required to fulfil the increasing demand for energy. In this work, low-loading (<20 wt\%) Ni-confined in layered metal oxide anode catalysts (birnessite and lepidocrocite titanate) have been synthesized by facile ion exchange methodology and subjected to systematic electrochemical studies. It was found that Ni-intercalated on K-rich birnessite (Ni-KMO) presents an onset overpotential (ηonset) as low as 100 mV and overpotential at 10 mA cm-2 (η10) of 206 mV in pH = 14 electrolyte. By combining electrochemical methods and X-ray absorption and emission spectroscopies (XAS and XES), we demonstrate Ni sites are the active sites for OER catalysis and that the Mn3+ sites facilitate Ni intercalation during the ion-exchange process, but display no observable contribution towards OER activity. The effect of the pH and the nature of the supporting electrolyte on the electrochemical performance was also evaluated. {\textcopyright} 2020 The Royal Society of Chemistry.",

author = "Yayun Pu and Lawrence, \{Matthew J.\} and Veronica Celorrio and Qi Wang and Meng Gu and Zongzhao Sun and J{\'a}come, \{Leonardo Agudo\} and Russell, \{Andrea E.\} and Limin Huang and Paramaconi Rodriguez",

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doi = "10.1039/d0ta04031b",

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TY - JOUR

T1 - Nickel confined in 2D earth-abundant oxide layers for highly efficient and durable oxygen evolution catalysts

AU - Pu, Yayun

AU - Lawrence, Matthew J.

AU - Celorrio, Veronica

AU - Wang, Qi

AU - Gu, Meng

AU - Sun, Zongzhao

AU - Jácome, Leonardo Agudo

AU - Russell, Andrea E.

AU - Huang, Limin

AU - Rodriguez, Paramaconi

PY - 2020/7/14

Y1 - 2020/7/14

N2 - Low cost, high-efficiency catalysts towards water splitting are urgently required to fulfil the increasing demand for energy. In this work, low-loading (<20 wt%) Ni-confined in layered metal oxide anode catalysts (birnessite and lepidocrocite titanate) have been synthesized by facile ion exchange methodology and subjected to systematic electrochemical studies. It was found that Ni-intercalated on K-rich birnessite (Ni-KMO) presents an onset overpotential (ηonset) as low as 100 mV and overpotential at 10 mA cm-2 (η10) of 206 mV in pH = 14 electrolyte. By combining electrochemical methods and X-ray absorption and emission spectroscopies (XAS and XES), we demonstrate Ni sites are the active sites for OER catalysis and that the Mn3+ sites facilitate Ni intercalation during the ion-exchange process, but display no observable contribution towards OER activity. The effect of the pH and the nature of the supporting electrolyte on the electrochemical performance was also evaluated. © 2020 The Royal Society of Chemistry.

AB - Low cost, high-efficiency catalysts towards water splitting are urgently required to fulfil the increasing demand for energy. In this work, low-loading (<20 wt%) Ni-confined in layered metal oxide anode catalysts (birnessite and lepidocrocite titanate) have been synthesized by facile ion exchange methodology and subjected to systematic electrochemical studies. It was found that Ni-intercalated on K-rich birnessite (Ni-KMO) presents an onset overpotential (ηonset) as low as 100 mV and overpotential at 10 mA cm-2 (η10) of 206 mV in pH = 14 electrolyte. By combining electrochemical methods and X-ray absorption and emission spectroscopies (XAS and XES), we demonstrate Ni sites are the active sites for OER catalysis and that the Mn3+ sites facilitate Ni intercalation during the ion-exchange process, but display no observable contribution towards OER activity. The effect of the pH and the nature of the supporting electrolyte on the electrochemical performance was also evaluated. © 2020 The Royal Society of Chemistry.

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U2 - 10.1039/d0ta04031b

DO - 10.1039/d0ta04031b

M3 - RGC 21 - Publication in refereed journal

SN - 2050-7488

VL - 8

SP - 13340

EP - 13350

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

IS - 26

ER -

Nickel confined in 2D earth-abundant oxide layers for highly efficient and durable oxygen evolution catalysts

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