Amorphous molybdenum phosphide nanoparticles for electrocatalytic hydrogen evolution

Joshua M. McEnaney, J. Chance Crompton, Juan F. Callejas, Eric J. Popczun, Adam J. Biacchi, Nathan S Lewis, Raymond E. Schaak

Research output: Contribution to journalArticle

237 Citations (Scopus)

Abstract

Amorphous molybdenum phosphide (MoP) nanoparticles have been synthesized and characterized as electrocatalysts for the hydrogen-evolution reaction (HER) in 0.50 M H2SO4 (pH 0.3). Amorphous MoP nanoparticles (having diameters of 4.2 ± 0.5 nm) formed upon heating Mo(CO)6 and trioctylphosphine in squalane at 320 °C, and the nanoparticles remained amorphous after heating at 450 °C in H2(5%)/Ar(95%) to remove the surface ligands. At mass loadings of 1 mg cm-2, MoP/Ti electrodes exhibited overpotentials of -90 and -105 mV (-110 and -140 mV without iR correction) at current densities of -10 and -20 mA cm-2, respectively. These HER overpotentials remained nearly constant over 500 cyclic voltammetric sweeps and 18 h of galvanostatic testing, indicating stability in acidic media under operating conditions. Amorphous MoP nanoparticles are therefore among the most active known molybdenum-based HER systems and are part of a growing family of active, acid-stable, non-noble-metal HER catalysts.

Original languageEnglish
Pages (from-to)4826-4831
Number of pages6
JournalChemistry of Materials
Volume26
Issue number16
DOIs
Publication statusPublished - 2014

Fingerprint

Molybdenum
Hydrogen
Nanoparticles
Heating
Electrocatalysts
Current density
Metals
Ligands
Electrodes
Catalysts
Acids
Testing

ASJC Scopus subject areas

  • Materials Chemistry
  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

McEnaney, J. M., Chance Crompton, J., Callejas, J. F., Popczun, E. J., Biacchi, A. J., Lewis, N. S., & Schaak, R. E. (2014). Amorphous molybdenum phosphide nanoparticles for electrocatalytic hydrogen evolution. Chemistry of Materials, 26(16), 4826-4831. https://doi.org/10.1021/cm502035s

Amorphous molybdenum phosphide nanoparticles for electrocatalytic hydrogen evolution. / McEnaney, Joshua M.; Chance Crompton, J.; Callejas, Juan F.; Popczun, Eric J.; Biacchi, Adam J.; Lewis, Nathan S; Schaak, Raymond E.

In: Chemistry of Materials, Vol. 26, No. 16, 2014, p. 4826-4831.

Research output: Contribution to journalArticle

McEnaney, JM, Chance Crompton, J, Callejas, JF, Popczun, EJ, Biacchi, AJ, Lewis, NS & Schaak, RE 2014, 'Amorphous molybdenum phosphide nanoparticles for electrocatalytic hydrogen evolution', Chemistry of Materials, vol. 26, no. 16, pp. 4826-4831. https://doi.org/10.1021/cm502035s
McEnaney JM, Chance Crompton J, Callejas JF, Popczun EJ, Biacchi AJ, Lewis NS et al. Amorphous molybdenum phosphide nanoparticles for electrocatalytic hydrogen evolution. Chemistry of Materials. 2014;26(16):4826-4831. https://doi.org/10.1021/cm502035s
McEnaney, Joshua M. ; Chance Crompton, J. ; Callejas, Juan F. ; Popczun, Eric J. ; Biacchi, Adam J. ; Lewis, Nathan S ; Schaak, Raymond E. / Amorphous molybdenum phosphide nanoparticles for electrocatalytic hydrogen evolution. In: Chemistry of Materials. 2014 ; Vol. 26, No. 16. pp. 4826-4831.
@article{d82089222fd444069b04521130fcacd1,
title = "Amorphous molybdenum phosphide nanoparticles for electrocatalytic hydrogen evolution",
abstract = "Amorphous molybdenum phosphide (MoP) nanoparticles have been synthesized and characterized as electrocatalysts for the hydrogen-evolution reaction (HER) in 0.50 M H2SO4 (pH 0.3). Amorphous MoP nanoparticles (having diameters of 4.2 ± 0.5 nm) formed upon heating Mo(CO)6 and trioctylphosphine in squalane at 320 °C, and the nanoparticles remained amorphous after heating at 450 °C in H2(5{\%})/Ar(95{\%}) to remove the surface ligands. At mass loadings of 1 mg cm-2, MoP/Ti electrodes exhibited overpotentials of -90 and -105 mV (-110 and -140 mV without iR correction) at current densities of -10 and -20 mA cm-2, respectively. These HER overpotentials remained nearly constant over 500 cyclic voltammetric sweeps and 18 h of galvanostatic testing, indicating stability in acidic media under operating conditions. Amorphous MoP nanoparticles are therefore among the most active known molybdenum-based HER systems and are part of a growing family of active, acid-stable, non-noble-metal HER catalysts.",
author = "McEnaney, {Joshua M.} and {Chance Crompton}, J. and Callejas, {Juan F.} and Popczun, {Eric J.} and Biacchi, {Adam J.} and Lewis, {Nathan S} and Schaak, {Raymond E.}",
year = "2014",
doi = "10.1021/cm502035s",
language = "English",
volume = "26",
pages = "4826--4831",
journal = "Chemistry of Materials",
issn = "0897-4756",
publisher = "American Chemical Society",
number = "16",

}

TY - JOUR

T1 - Amorphous molybdenum phosphide nanoparticles for electrocatalytic hydrogen evolution

AU - McEnaney, Joshua M.

AU - Chance Crompton, J.

AU - Callejas, Juan F.

AU - Popczun, Eric J.

AU - Biacchi, Adam J.

AU - Lewis, Nathan S

AU - Schaak, Raymond E.

PY - 2014

Y1 - 2014

N2 - Amorphous molybdenum phosphide (MoP) nanoparticles have been synthesized and characterized as electrocatalysts for the hydrogen-evolution reaction (HER) in 0.50 M H2SO4 (pH 0.3). Amorphous MoP nanoparticles (having diameters of 4.2 ± 0.5 nm) formed upon heating Mo(CO)6 and trioctylphosphine in squalane at 320 °C, and the nanoparticles remained amorphous after heating at 450 °C in H2(5%)/Ar(95%) to remove the surface ligands. At mass loadings of 1 mg cm-2, MoP/Ti electrodes exhibited overpotentials of -90 and -105 mV (-110 and -140 mV without iR correction) at current densities of -10 and -20 mA cm-2, respectively. These HER overpotentials remained nearly constant over 500 cyclic voltammetric sweeps and 18 h of galvanostatic testing, indicating stability in acidic media under operating conditions. Amorphous MoP nanoparticles are therefore among the most active known molybdenum-based HER systems and are part of a growing family of active, acid-stable, non-noble-metal HER catalysts.

AB - Amorphous molybdenum phosphide (MoP) nanoparticles have been synthesized and characterized as electrocatalysts for the hydrogen-evolution reaction (HER) in 0.50 M H2SO4 (pH 0.3). Amorphous MoP nanoparticles (having diameters of 4.2 ± 0.5 nm) formed upon heating Mo(CO)6 and trioctylphosphine in squalane at 320 °C, and the nanoparticles remained amorphous after heating at 450 °C in H2(5%)/Ar(95%) to remove the surface ligands. At mass loadings of 1 mg cm-2, MoP/Ti electrodes exhibited overpotentials of -90 and -105 mV (-110 and -140 mV without iR correction) at current densities of -10 and -20 mA cm-2, respectively. These HER overpotentials remained nearly constant over 500 cyclic voltammetric sweeps and 18 h of galvanostatic testing, indicating stability in acidic media under operating conditions. Amorphous MoP nanoparticles are therefore among the most active known molybdenum-based HER systems and are part of a growing family of active, acid-stable, non-noble-metal HER catalysts.

UR - http://www.scopus.com/inward/record.url?scp=84906540211&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84906540211&partnerID=8YFLogxK

U2 - 10.1021/cm502035s

DO - 10.1021/cm502035s

M3 - Article

AN - SCOPUS:84906540211

VL - 26

SP - 4826

EP - 4831

JO - Chemistry of Materials

JF - Chemistry of Materials

SN - 0897-4756

IS - 16

ER -