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Tuning palladium nickel phosphide toward efficient oxygen evolution performance

Highly efficient and durable catalysts are increasingly sought in water electrolysis, particularly for resolving the sluggish oxygen evolution reaction (OER) kinetics. Herein, ternary phosphides in the palladium-nickel-phosphorus system developed via a simple reduction approach as hollow and dense n...

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Main Authors: Sankar, Sasidharan, Sugawara, Yuuki, Aravindh, S. Assa, Rajan, Jose, Tamaki, Takanori, Anilkumar, Gopinathan M., Yamaguchi, Takeo
Format: Article
Language:English
Published: American Chemical Society 2020
Subjects:
TP Chemical technology
Online Access:http://umpir.ump.edu.my/id/eprint/30791/1/Tuning%20palladium%20nickel%20phosphide%20toward%20efficient%20oxygen%20evolution%20performance.pdf
http://umpir.ump.edu.my/id/eprint/30791/
https://doi.org/10.1021/acsaem.9b01996
https://doi.org/10.1021/acsaem.9b01996
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spelling my.ump.umpir.307912021-02-25T07:56:42Z http://umpir.ump.edu.my/id/eprint/30791/ Tuning palladium nickel phosphide toward efficient oxygen evolution performance Sankar, Sasidharan Sugawara, Yuuki Aravindh, S. Assa Rajan, Jose Tamaki, Takanori Anilkumar, Gopinathan M. Yamaguchi, Takeo TP Chemical technology Highly efficient and durable catalysts are increasingly sought in water electrolysis, particularly for resolving the sluggish oxygen evolution reaction (OER) kinetics. Herein, ternary phosphides in the palladium-nickel-phosphorus system developed via a simple reduction approach as hollow and dense nanostructures (PdNiP-H and PdNiP-D, respectively) are shown to overcome the kinetic drawbacks of Pd and deliver superior alkaline OER activity. The PdNiPH showed OER activity at a significantly lower overpotential (300 mV) and Tafel slope (48 mV dec -1 ) in addition to having a longer stability than the corresponding dense particles (PdNiPD) (330 mV and 49 mV dec -1 ) and the commercial benchmark, RuO2 (360 mV and 67 mV dec - 1 ), in half-cell conditions. While combining experiments and density functional theory (DFT) calculations, these enhancements are shown to arise from surface properties and the modified electronic environment of the ternary phosphide as well as by the enhanced charge transfer sites due to the hollow architecture. DFT calculations identify the density of states (DOS) and support Pd lattice alteration, the shift in the d band center, and the subsequent modification in electronic properties of Pd that is favorable for OER. The phosphodization methodology adopted here highlights an efficient strategy for generating a range of morphologies of ternary phosphides as sustainable and stable energy conversion/storage materials. American Chemical Society 2020-01-27 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/30791/1/Tuning%20palladium%20nickel%20phosphide%20toward%20efficient%20oxygen%20evolution%20performance.pdf Sankar, Sasidharan and Sugawara, Yuuki and Aravindh, S. Assa and Rajan, Jose and Tamaki, Takanori and Anilkumar, Gopinathan M. and Yamaguchi, Takeo (2020) Tuning palladium nickel phosphide toward efficient oxygen evolution performance. ACS Applied Energy Materials, 3 (1). pp. 879-888. ISSN 2574-0962 https://doi.org/10.1021/acsaem.9b01996 https://doi.org/10.1021/acsaem.9b01996
institution Universiti Malaysia Pahang
building UMP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Pahang
content_source UMP Institutional Repository
url_provider http://umpir.ump.edu.my/
language English
topic TP Chemical technology
spellingShingle TP Chemical technology
Sankar, Sasidharan
Sugawara, Yuuki
Aravindh, S. Assa
Rajan, Jose
Tamaki, Takanori
Anilkumar, Gopinathan M.
Yamaguchi, Takeo
Tuning palladium nickel phosphide toward efficient oxygen evolution performance
description Highly efficient and durable catalysts are increasingly sought in water electrolysis, particularly for resolving the sluggish oxygen evolution reaction (OER) kinetics. Herein, ternary phosphides in the palladium-nickel-phosphorus system developed via a simple reduction approach as hollow and dense nanostructures (PdNiP-H and PdNiP-D, respectively) are shown to overcome the kinetic drawbacks of Pd and deliver superior alkaline OER activity. The PdNiPH showed OER activity at a significantly lower overpotential (300 mV) and Tafel slope (48 mV dec -1 ) in addition to having a longer stability than the corresponding dense particles (PdNiPD) (330 mV and 49 mV dec -1 ) and the commercial benchmark, RuO2 (360 mV and 67 mV dec - 1 ), in half-cell conditions. While combining experiments and density functional theory (DFT) calculations, these enhancements are shown to arise from surface properties and the modified electronic environment of the ternary phosphide as well as by the enhanced charge transfer sites due to the hollow architecture. DFT calculations identify the density of states (DOS) and support Pd lattice alteration, the shift in the d band center, and the subsequent modification in electronic properties of Pd that is favorable for OER. The phosphodization methodology adopted here highlights an efficient strategy for generating a range of morphologies of ternary phosphides as sustainable and stable energy conversion/storage materials.
format Article
author Sankar, Sasidharan
Sugawara, Yuuki
Aravindh, S. Assa
Rajan, Jose
Tamaki, Takanori
Anilkumar, Gopinathan M.
Yamaguchi, Takeo
author_facet Sankar, Sasidharan
Sugawara, Yuuki
Aravindh, S. Assa
Rajan, Jose
Tamaki, Takanori
Anilkumar, Gopinathan M.
Yamaguchi, Takeo
author_sort Sankar, Sasidharan
title Tuning palladium nickel phosphide toward efficient oxygen evolution performance
title_short Tuning palladium nickel phosphide toward efficient oxygen evolution performance
title_full Tuning palladium nickel phosphide toward efficient oxygen evolution performance
title_fullStr Tuning palladium nickel phosphide toward efficient oxygen evolution performance
title_full_unstemmed Tuning palladium nickel phosphide toward efficient oxygen evolution performance
title_sort tuning palladium nickel phosphide toward efficient oxygen evolution performance
publisher American Chemical Society
publishDate 2020
url http://umpir.ump.edu.my/id/eprint/30791/1/Tuning%20palladium%20nickel%20phosphide%20toward%20efficient%20oxygen%20evolution%20performance.pdf
http://umpir.ump.edu.my/id/eprint/30791/
https://doi.org/10.1021/acsaem.9b01996
https://doi.org/10.1021/acsaem.9b01996
_version_ 1692991978797531136
score 13.211869

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