Operando Spectroscopic Analysis of CoP Films Electrocatalyzing the Hydrogen-Evolution Reaction

Fadl H. Saadi, Azhar I. Carim, Walter S. Drisdell, Sheraz Gul, Jack H. Baricuatro, Junko Yano, Manuel P. Soriaga, Nathan S Lewis

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

Transition metal phosphides exhibit high catalytic activity toward the electrochemical hydrogen-evolution reaction (HER) and resist chemical corrosion in acidic solutions. For example, an electrodeposited CoP catalyst exhibited an overpotential, of â'< 100 mV at a current density of â'10 mA cm-2 in 0.500 M H2SO4(aq). To obtain a chemical description of the material as-prepared and also while effecting the HER in acidic media, such electrocatalyst films were investigated using Raman spectroscopy and X-ray absorption spectroscopy both ex situ as well as under in situ and operando conditions in 0.500 M H2SO4(aq). Ex situ analysis using the tandem spectroscopies indicated the presence of multiple ordered and disordered phases that contained both near-zerovalent and oxidized Co species, in addition to reduced and oxygenated P species. Operando analysis indicated that the active electrocatalyst was primarily amorphous and predominantly consisted of near-zerovalent Co as well as reduced P.

Original languageEnglish
Pages (from-to)12927-12930
Number of pages4
JournalJournal of the American Chemical Society
Volume139
Issue number37
DOIs
Publication statusPublished - Jan 1 2017

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Spectroscopic analysis
Electrocatalysts
Hydrogen
X-Ray Absorption Spectroscopy
X ray absorption spectroscopy
Corrosion
Raman Spectrum Analysis
Transition metals
Raman spectroscopy
Catalyst activity
Spectrum Analysis
Current density
Metals
Spectroscopy
Catalysts

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Operando Spectroscopic Analysis of CoP Films Electrocatalyzing the Hydrogen-Evolution Reaction. / Saadi, Fadl H.; Carim, Azhar I.; Drisdell, Walter S.; Gul, Sheraz; Baricuatro, Jack H.; Yano, Junko; Soriaga, Manuel P.; Lewis, Nathan S.

In: Journal of the American Chemical Society, Vol. 139, No. 37, 01.01.2017, p. 12927-12930.

Research output: Contribution to journalArticle

Saadi, FH, Carim, AI, Drisdell, WS, Gul, S, Baricuatro, JH, Yano, J, Soriaga, MP & Lewis, NS 2017, 'Operando Spectroscopic Analysis of CoP Films Electrocatalyzing the Hydrogen-Evolution Reaction', Journal of the American Chemical Society, vol. 139, no. 37, pp. 12927-12930. https://doi.org/10.1021/jacs.7b07606
Saadi, Fadl H. ; Carim, Azhar I. ; Drisdell, Walter S. ; Gul, Sheraz ; Baricuatro, Jack H. ; Yano, Junko ; Soriaga, Manuel P. ; Lewis, Nathan S. / Operando Spectroscopic Analysis of CoP Films Electrocatalyzing the Hydrogen-Evolution Reaction. In: Journal of the American Chemical Society. 2017 ; Vol. 139, No. 37. pp. 12927-12930.
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