Ni nanoparticles on active (001) facet-exposed rutile TiO2 nanopyramid arrays for efficient hydrogen evolution

Yong Li; Kyung Ah Min; Byungchan Han; Lawrence Yoon Suk Lee

doi:10.1016/j.apcatb.2020.119548

Ni nanoparticles on active (001) facet-exposed rutile TiO₂ nanopyramid arrays for efficient hydrogen evolution

Yong Li, Kyung Ah Min, Byungchan Han, Lawrence Yoon Suk Lee (Corresponding Author)

Research output: Journal article publication › Journal article › Academic research › peer-review

43 Citations (Scopus)

Abstract

Efficient earth-abundant electrocatalysts for hydrogen evolution reaction (HER) is crucial for realizing cost-effective hydrogen production as a renewable energy source. Herein, we report highly enhanced HER activity of Ni nanoparticles (NPs) on TiO₂ nanopyramid arrays (NPAs). The (001) facets exposed on TiO₂ NPAs provide strong adsorption sites for Ni NPs, and the charge redistribution between Ni NPs and TiO₂ tunes the adsorption energy of HER intermediates, optimizing HER activity as manifested by low overpotential of 88 mV at 10 mA cm⁻² and Tafel slope of 78 mV dec^-1. The modification of the Ni/TiO₂ NPAs with nitrogen-doped carbon quantum dot layer forms an active interface of Ni-N-C bonds, which enhances the stability and activates the Ni NPs on inactive {110} facets to further lower the overpotential to 65 mV at 10 mA cm⁻². This work provides a new insight into rational design of non-noble metal electrocatalysts for highly promoted hydrogen production.

Original language	English
Article number	119548
Journal	Applied Catalysis B: Environmental
Volume	282
DOIs	https://doi.org/10.1016/j.apcatb.2020.119548
Publication status	Published - Mar 2021

Keywords

Electrocatalyst
Facet engineering
Hydrogen evolution reaction
Ni nanoparticles
TiO nanopyramid

ASJC Scopus subject areas

Catalysis
General Environmental Science
Process Chemistry and Technology

UN SDGs

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

More information

10.1016/j.apcatb.2020.119548

http://hdl.handle.net/10397/100095

Cite this

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title = "Ni nanoparticles on active (001) facet-exposed rutile TiO2 nanopyramid arrays for efficient hydrogen evolution",

abstract = "Efficient earth-abundant electrocatalysts for hydrogen evolution reaction (HER) is crucial for realizing cost-effective hydrogen production as a renewable energy source. Herein, we report highly enhanced HER activity of Ni nanoparticles (NPs) on TiO2 nanopyramid arrays (NPAs). The (001) facets exposed on TiO2 NPAs provide strong adsorption sites for Ni NPs, and the charge redistribution between Ni NPs and TiO2 tunes the adsorption energy of HER intermediates, optimizing HER activity as manifested by low overpotential of 88 mV at 10 mA cm−2 and Tafel slope of 78 mV dec-1. The modification of the Ni/TiO2 NPAs with nitrogen-doped carbon quantum dot layer forms an active interface of Ni-N-C bonds, which enhances the stability and activates the Ni NPs on inactive {110} facets to further lower the overpotential to 65 mV at 10 mA cm−2. This work provides a new insight into rational design of non-noble metal electrocatalysts for highly promoted hydrogen production.",

keywords = "Electrocatalyst, Facet engineering, Hydrogen evolution reaction, Ni nanoparticles, TiO nanopyramid",

author = "Yong Li and Min, {Kyung Ah} and Byungchan Han and Lee, {Lawrence Yoon Suk}",

note = "Funding Information: This work was supported by the Innovation and Technology Commission of Hong Kong and Hong Kong Polytechnic University (Grant No: 1-BE0Y ), and the Global Frontier Program through the Global Frontier Hybrid Interface Materials (GFHIM) of National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (Project No. 2013M3A6B1078882). Publisher Copyright: {\textcopyright} 2020 Elsevier B.V. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

year = "2021",

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doi = "10.1016/j.apcatb.2020.119548",

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AU - Han, Byungchan

AU - Lee, Lawrence Yoon Suk

N1 - Funding Information: This work was supported by the Innovation and Technology Commission of Hong Kong and Hong Kong Polytechnic University (Grant No: 1-BE0Y ), and the Global Frontier Program through the Global Frontier Hybrid Interface Materials (GFHIM) of National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (Project No. 2013M3A6B1078882). Publisher Copyright: © 2020 Elsevier B.V. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2021/3

Y1 - 2021/3

N2 - Efficient earth-abundant electrocatalysts for hydrogen evolution reaction (HER) is crucial for realizing cost-effective hydrogen production as a renewable energy source. Herein, we report highly enhanced HER activity of Ni nanoparticles (NPs) on TiO2 nanopyramid arrays (NPAs). The (001) facets exposed on TiO2 NPAs provide strong adsorption sites for Ni NPs, and the charge redistribution between Ni NPs and TiO2 tunes the adsorption energy of HER intermediates, optimizing HER activity as manifested by low overpotential of 88 mV at 10 mA cm−2 and Tafel slope of 78 mV dec-1. The modification of the Ni/TiO2 NPAs with nitrogen-doped carbon quantum dot layer forms an active interface of Ni-N-C bonds, which enhances the stability and activates the Ni NPs on inactive {110} facets to further lower the overpotential to 65 mV at 10 mA cm−2. This work provides a new insight into rational design of non-noble metal electrocatalysts for highly promoted hydrogen production.

AB - Efficient earth-abundant electrocatalysts for hydrogen evolution reaction (HER) is crucial for realizing cost-effective hydrogen production as a renewable energy source. Herein, we report highly enhanced HER activity of Ni nanoparticles (NPs) on TiO2 nanopyramid arrays (NPAs). The (001) facets exposed on TiO2 NPAs provide strong adsorption sites for Ni NPs, and the charge redistribution between Ni NPs and TiO2 tunes the adsorption energy of HER intermediates, optimizing HER activity as manifested by low overpotential of 88 mV at 10 mA cm−2 and Tafel slope of 78 mV dec-1. The modification of the Ni/TiO2 NPAs with nitrogen-doped carbon quantum dot layer forms an active interface of Ni-N-C bonds, which enhances the stability and activates the Ni NPs on inactive {110} facets to further lower the overpotential to 65 mV at 10 mA cm−2. This work provides a new insight into rational design of non-noble metal electrocatalysts for highly promoted hydrogen production.

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