General Strategy for the Synthesis of Transition Metal Phosphide Films for Electrocatalytic Hydrogen and Oxygen Evolution

Carlos G. Read, Juan F. Callejas, Cameron F. Holder, Raymond Edward Schaak

Research output: Contribution to journalArticle

110 Citations (Scopus)

Abstract

Transition metal phosphides recently have been identified as promising Earth-abundant electrocatalysts for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). Here, we present a general and scalable strategy for the synthesis of transition metal phosphide electrodes based on the reaction of commercially available metal foils (Fe, Co, Ni, Cu, and NiFe) with various organophosphine reagents. The resulting phosphide electrodes were found to exhibit excellent electrocatalytic HER and OER performance. The most active electrodes required overpotentials of only -128 mV for the HER in acid (Ni2P), -183 mV for the HER in base (Ni2P), and 277 mV for the OER in base (NiFeP) to produce operationally relevant current densities of 10 mA cm-2. Such HER and OER performance compares favorably with samples prepared using significantly more elaborate and costly procedures. Furthermore, we demonstrate that the approach can also be utilized to obtain highly active and conformal metal phosphide coatings on photocathode materials, such as highly doped Si, that are relevant to solar fuels production.

Original languageEnglish (US)
Pages (from-to)12798-12803
Number of pages6
JournalACS Applied Materials and Interfaces
Volume8
Issue number20
DOIs
StatePublished - May 25 2016

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Transition metals
Hydrogen
Oxygen
Electrodes
Photocathodes
Electrocatalysts
Metal foil
Current density
Metals
Earth (planet)
Coatings
Acids

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

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abstract = "Transition metal phosphides recently have been identified as promising Earth-abundant electrocatalysts for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). Here, we present a general and scalable strategy for the synthesis of transition metal phosphide electrodes based on the reaction of commercially available metal foils (Fe, Co, Ni, Cu, and NiFe) with various organophosphine reagents. The resulting phosphide electrodes were found to exhibit excellent electrocatalytic HER and OER performance. The most active electrodes required overpotentials of only -128 mV for the HER in acid (Ni2P), -183 mV for the HER in base (Ni2P), and 277 mV for the OER in base (NiFeP) to produce operationally relevant current densities of 10 mA cm-2. Such HER and OER performance compares favorably with samples prepared using significantly more elaborate and costly procedures. Furthermore, we demonstrate that the approach can also be utilized to obtain highly active and conformal metal phosphide coatings on photocathode materials, such as highly doped Si, that are relevant to solar fuels production.",
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General Strategy for the Synthesis of Transition Metal Phosphide Films for Electrocatalytic Hydrogen and Oxygen Evolution. / Read, Carlos G.; Callejas, Juan F.; Holder, Cameron F.; Schaak, Raymond Edward.

In: ACS Applied Materials and Interfaces, Vol. 8, No. 20, 25.05.2016, p. 12798-12803.

Research output: Contribution to journalArticle

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