Molten state synthesis of nickel phosphides: mechanism and composition-activity correlation for electrochemical applications

Rotem Geva; Natasha Ronith Levy; Jonathan Tzadikov; Reut Cohen; Michal Weitman; Lidan Xing; Liel Abisdris; Jesús Barrio; Jiawei Xia; Michael Volokh; Yair Ein-Eli; Menny Shalom

doi:10.1039/d1ta08455k

Molten state synthesis of nickel phosphides: mechanism and composition-activity correlation for electrochemical applications

Rotem Geva
, Natasha Ronith Levy
, Jonathan Tzadikov
, Reut Cohen
, Michal Weitman
, Lidan Xing
, Liel Abisdris
, Jesús Barrio
, Jiawei Xia
, Michael Volokh
, Yair Ein-Eli
, Menny Shalom

Department of Chemistry

Ben-Gurion University of the Negev
Nuclear Research Center-Negev
Technion-Israel Institute of Technology
South China Normal University

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

17 Scopus citations

Abstract

Nickel phosphides are highly attractive low-cost (electro)catalysts, thanks to their unique electronic structure, versatile phase diagram, and chemical stability. Herein, we describe a single-step, simple, and scalable synthesis of nickel phosphides, with good control over phase composition, size, and catalytic activity, by a direct thermal reaction of nickel nitrate hexahydrate and triphenylphosphine (PPh₃). Advanced analytic tools combined with theoretical calculations reveal that upon heating, nickel ions are dissolved and coordinated by PPh₃, enabling the synthesis of fine-tuned particles, with nickel phosphide phases ranging from Ni₃P to Ni₂P. The new synthetic method enables comprehending the correlation between phase composition and the phosphides' catalytic activity. This work shows a clear composition-activity trend of the optimized nickel phosphides both as electrocatalysts for the hydrogen evolution reaction in acidic media and as anode materials in Li-ion batteries.

Original language	English
Pages (from-to)	27629-27638
Number of pages	10
Journal	Journal of Materials Chemistry A
Volume	9
Issue number	48
DOIs	https://doi.org/10.1039/d1ta08455k
State	Published - 28 Dec 2021

Bibliographical note

Publisher Copyright:
© The Royal Society of Chemistry 2021.

Funding

The authors thank Dr Natalya Froumin and Adi Azoulay for materials characterization and Dr Vladimir Ezersky for fruitful discussion in electron microscopy. This work was nancially supported by the Planning & Budgeting Committee/Israel Council for Higher Education (CHE) and Fuel Choice Initiative (Prime Minister Office of Israel), within the framework of “Israel National Research Center for Electrochemical Propulsion” (INREP), and the Minerva Stiung – Minerva centers and school, No. 117873. The authors thank Dr Natalya Froumin and Adi Azoulay for materials characterization and Dr Vladimir Ezersky for fruitful discussion in electron microscopy. This work was financially supported by the Planning & Budgeting Committee/Israel Council for Higher Education (CHE) and Fuel Choice Initiative (Prime Minister Office of Israel), within the framework of ?Israel National Research Center for Electrochemical Propulsion? (INREP), and the Minerva Stiftung - Minerva centers and school, No. 117873.

Funders	Funder number
Fuel Choice Initiative
Prime Minister office of Israel	117873
Minerva Foundation
Council for Higher Education
Planning and Budgeting Committee of the Council for Higher Education of Israel
Israel National Research Center for Electrochemical Propulsion

UN SDGs

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

SDG 7 Affordable and Clean Energy

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10.1039/d1ta08455k

Cite this

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title = "Molten state synthesis of nickel phosphides: mechanism and composition-activity correlation for electrochemical applications",

abstract = "Nickel phosphides are highly attractive low-cost (electro)catalysts, thanks to their unique electronic structure, versatile phase diagram, and chemical stability. Herein, we describe a single-step, simple, and scalable synthesis of nickel phosphides, with good control over phase composition, size, and catalytic activity, by a direct thermal reaction of nickel nitrate hexahydrate and triphenylphosphine (PPh3). Advanced analytic tools combined with theoretical calculations reveal that upon heating, nickel ions are dissolved and coordinated by PPh3, enabling the synthesis of fine-tuned particles, with nickel phosphide phases ranging from Ni3P to Ni2P. The new synthetic method enables comprehending the correlation between phase composition and the phosphides' catalytic activity. This work shows a clear composition-activity trend of the optimized nickel phosphides both as electrocatalysts for the hydrogen evolution reaction in acidic media and as anode materials in Li-ion batteries.",

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AU - Geva, Rotem

AU - Levy, Natasha Ronith

AU - Tzadikov, Jonathan

AU - Cohen, Reut

AU - Weitman, Michal

AU - Xing, Lidan

AU - Abisdris, Liel

AU - Barrio, Jesús

AU - Xia, Jiawei

AU - Volokh, Michael

AU - Ein-Eli, Yair

AU - Shalom, Menny

PY - 2021/12/28

Y1 - 2021/12/28

N2 - Nickel phosphides are highly attractive low-cost (electro)catalysts, thanks to their unique electronic structure, versatile phase diagram, and chemical stability. Herein, we describe a single-step, simple, and scalable synthesis of nickel phosphides, with good control over phase composition, size, and catalytic activity, by a direct thermal reaction of nickel nitrate hexahydrate and triphenylphosphine (PPh3). Advanced analytic tools combined with theoretical calculations reveal that upon heating, nickel ions are dissolved and coordinated by PPh3, enabling the synthesis of fine-tuned particles, with nickel phosphide phases ranging from Ni3P to Ni2P. The new synthetic method enables comprehending the correlation between phase composition and the phosphides' catalytic activity. This work shows a clear composition-activity trend of the optimized nickel phosphides both as electrocatalysts for the hydrogen evolution reaction in acidic media and as anode materials in Li-ion batteries.

AB - Nickel phosphides are highly attractive low-cost (electro)catalysts, thanks to their unique electronic structure, versatile phase diagram, and chemical stability. Herein, we describe a single-step, simple, and scalable synthesis of nickel phosphides, with good control over phase composition, size, and catalytic activity, by a direct thermal reaction of nickel nitrate hexahydrate and triphenylphosphine (PPh3). Advanced analytic tools combined with theoretical calculations reveal that upon heating, nickel ions are dissolved and coordinated by PPh3, enabling the synthesis of fine-tuned particles, with nickel phosphide phases ranging from Ni3P to Ni2P. The new synthetic method enables comprehending the correlation between phase composition and the phosphides' catalytic activity. This work shows a clear composition-activity trend of the optimized nickel phosphides both as electrocatalysts for the hydrogen evolution reaction in acidic media and as anode materials in Li-ion batteries.

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Molten state synthesis of nickel phosphides: mechanism and composition-activity correlation for electrochemical applications

Abstract

Bibliographical note

Funding

UN SDGs

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