Experimental and Theoretical Investigation of Reconstruction and Active Phases on Honeycombed Ni3N-Co3N/C in Water Splitting

Chao Huang; Biao Zhang; Yuzheng Wu; Qingdong Ruan; Liangliang Liu; Jianjun Su; Yunqi Tang; Rugeng Liu; Paul Kim Ho Chu

doi:10.1016/j.apcatb.2021.120461

Experimental and Theoretical Investigation of Reconstruction and Active Phases on Honeycombed Ni3N-Co3N/C in Water Splitting

Chao Huang (Co-first Author)
, Biao Zhang (Co-first Author)
, Yuzheng Wu
, Qingdong Ruan
, Liangliang Liu
, Jianjun Su
, Yunqi Tang
, Rugeng Liu
, Paul Kim Ho Chu^*

^*Corresponding author for this work

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

103 Citations (Scopus)

Abstract

Honeycombed Ni₃N-Co₃N decorated with carbon speckles (Ni₃N-Co₃N/C) is prepared on nickel foam as a potent, economical, and durable water-splitting catalyst. The Ni₃N-Co₃N/C system has excellent properties in the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), such as low overpotentials of 320/175 mV at 100 mA cm⁻², small Tafel slopes of 55.2/70.2 mV dec⁻¹, as well as excellent stability for over 7 days. To demonstrate the commercial practicality, an overall water splitting cell composed of the bifunctional Ni₃N-Co₃N/C catalyst as both the anode and cathode is assembled and can be driven by a standard 1.5 V battery. Based on experimental and theoretical results obtained by in situ Raman scattering, ex situ XPS, and density-functional theory, the precise effects of the active sites and conductivity, roles of Ni₃N, Co₃N, and C, and reaction mechanism in HER and OER, are investigated and described.

Original language	English
Article number	120461
Number of pages	10
Journal	Applied Catalysis B: Environmental
Volume	297
Online published	15 Jun 2021
DOIs	https://doi.org/10.1016/j.apcatb.2021.120461
Publication status	Published - 15 Nov 2021

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This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Research Keywords

Water splitting
Ni3N-Co3N/C
Interface effect
Surface reconstruction

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10.1016/j.apcatb.2021.120461

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@article{50df7bd0ea464865b6c72e992c4e61ab,

title = "Experimental and Theoretical Investigation of Reconstruction and Active Phases on Honeycombed Ni3N-Co3N/C in Water Splitting",

abstract = "Honeycombed Ni3N-Co3N decorated with carbon speckles (Ni3N-Co3N/C) is prepared on nickel foam as a potent, economical, and durable water-splitting catalyst. The Ni3N-Co3N/C system has excellent properties in the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), such as low overpotentials of 320/175 mV at 100 mA cm−2, small Tafel slopes of 55.2/70.2 mV dec−1, as well as excellent stability for over 7 days. To demonstrate the commercial practicality, an overall water splitting cell composed of the bifunctional Ni3N-Co3N/C catalyst as both the anode and cathode is assembled and can be driven by a standard 1.5 V battery. Based on experimental and theoretical results obtained by in situ Raman scattering, ex situ XPS, and density-functional theory, the precise effects of the active sites and conductivity, roles of Ni3N, Co3N, and C, and reaction mechanism in HER and OER, are investigated and described. ",

keywords = "Water splitting, Ni3N-Co3N/C, Interface effect, Surface reconstruction",

author = "Chao Huang and Biao Zhang and Yuzheng Wu and Qingdong Ruan and Liangliang Liu and Jianjun Su and Yunqi Tang and Rugeng Liu and Chu, \{Paul Kim Ho\}",

year = "2021",

month = nov,

day = "15",

doi = "10.1016/j.apcatb.2021.120461",

language = "English",

volume = "297",

journal = "Applied Catalysis B: Environmental",

issn = "0926-3373",

publisher = "Elsevier B.V.",

}

Experimental and Theoretical Investigation of Reconstruction and Active Phases on Honeycombed Ni3N-Co3N/C in Water Splitting. / Huang, Chao (Co-first Author); Zhang, Biao (Co-first Author); Wu, Yuzheng et al.
In: Applied Catalysis B: Environmental, Vol. 297, 120461, 15.11.2021.

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

TY - JOUR

T1 - Experimental and Theoretical Investigation of Reconstruction and Active Phases on Honeycombed Ni3N-Co3N/C in Water Splitting

AU - Huang, Chao

AU - Zhang, Biao

AU - Wu, Yuzheng

AU - Ruan, Qingdong

AU - Liu, Liangliang

AU - Su, Jianjun

AU - Tang, Yunqi

AU - Liu, Rugeng

AU - Chu, Paul Kim Ho

PY - 2021/11/15

Y1 - 2021/11/15

N2 - Honeycombed Ni3N-Co3N decorated with carbon speckles (Ni3N-Co3N/C) is prepared on nickel foam as a potent, economical, and durable water-splitting catalyst. The Ni3N-Co3N/C system has excellent properties in the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), such as low overpotentials of 320/175 mV at 100 mA cm−2, small Tafel slopes of 55.2/70.2 mV dec−1, as well as excellent stability for over 7 days. To demonstrate the commercial practicality, an overall water splitting cell composed of the bifunctional Ni3N-Co3N/C catalyst as both the anode and cathode is assembled and can be driven by a standard 1.5 V battery. Based on experimental and theoretical results obtained by in situ Raman scattering, ex situ XPS, and density-functional theory, the precise effects of the active sites and conductivity, roles of Ni3N, Co3N, and C, and reaction mechanism in HER and OER, are investigated and described.

AB - Honeycombed Ni3N-Co3N decorated with carbon speckles (Ni3N-Co3N/C) is prepared on nickel foam as a potent, economical, and durable water-splitting catalyst. The Ni3N-Co3N/C system has excellent properties in the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), such as low overpotentials of 320/175 mV at 100 mA cm−2, small Tafel slopes of 55.2/70.2 mV dec−1, as well as excellent stability for over 7 days. To demonstrate the commercial practicality, an overall water splitting cell composed of the bifunctional Ni3N-Co3N/C catalyst as both the anode and cathode is assembled and can be driven by a standard 1.5 V battery. Based on experimental and theoretical results obtained by in situ Raman scattering, ex situ XPS, and density-functional theory, the precise effects of the active sites and conductivity, roles of Ni3N, Co3N, and C, and reaction mechanism in HER and OER, are investigated and described.

KW - Water splitting

KW - Ni3N-Co3N/C

KW - Interface effect

KW - Surface reconstruction

UR - https://www.scopus.com/pages/publications/85109452213

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85109452213&origin=recordpage

U2 - 10.1016/j.apcatb.2021.120461

DO - 10.1016/j.apcatb.2021.120461

M3 - RGC 21 - Publication in refereed journal

SN - 0926-3373

VL - 297

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

M1 - 120461

ER -

Experimental and Theoretical Investigation of Reconstruction and Active Phases on Honeycombed Ni3N-Co3N/C in Water Splitting

Abstract

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