Electrodeposition from acidic solutions of nickel bis(benzenedithiolate) produces a hydrogen-evolving Ni-S film on glassy carbon

Ming Fang, Mark H. Engelhard, Zihua Zhu, Monte Helm, John Roberts

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

Films electrodeposited onto glassy carbon electrodes from acidic acetonitrile solutions of [Bu4N][Ni(bdt)2] (bdt = 1,2-benzenedithiolate) are active toward electrocatalytic hydrogen production at potentials 0.2-0.4 V positive of untreated electrodes. This activity is preserved when the electrode is rinsed and transferred to a fresh acid solution. X-ray photoelectron spectra indicate that the deposited material contains Ni and S, and time-of-flight secondary ion mass spectrometry shows that electrodeposition decomposes the Ni(bdt)2 assembly. Correlations between voltammetric and spectroscopic results indicate that the deposited material is active, i.e., that catalysis is heterogeneous rather than homogeneous. Control experiments establish that obtaining the observed catalytic response requires both Ni and the 1,2-benzenedithiolate ligand to be present during deposition.

Original languageEnglish
Pages (from-to)90-98
Number of pages9
JournalACS Catalysis
Volume4
Issue number1
DOIs
Publication statusPublished - Jan 3 2014

Fingerprint

Glassy carbon
Nickel
Electrodeposition
Hydrogen
Electrodes
Hydrogen production
Secondary ion mass spectrometry
Photoelectrons
Acetonitrile
Catalysis
Ligands
X rays
Acids
Experiments

Keywords

  • electrocatalysis
  • electrode modification
  • electrodeposition
  • hydrogen
  • nickel thiolate

ASJC Scopus subject areas

  • Catalysis

Cite this

Electrodeposition from acidic solutions of nickel bis(benzenedithiolate) produces a hydrogen-evolving Ni-S film on glassy carbon. / Fang, Ming; Engelhard, Mark H.; Zhu, Zihua; Helm, Monte; Roberts, John.

In: ACS Catalysis, Vol. 4, No. 1, 03.01.2014, p. 90-98.

Research output: Contribution to journalArticle

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AB - Films electrodeposited onto glassy carbon electrodes from acidic acetonitrile solutions of [Bu4N][Ni(bdt)2] (bdt = 1,2-benzenedithiolate) are active toward electrocatalytic hydrogen production at potentials 0.2-0.4 V positive of untreated electrodes. This activity is preserved when the electrode is rinsed and transferred to a fresh acid solution. X-ray photoelectron spectra indicate that the deposited material contains Ni and S, and time-of-flight secondary ion mass spectrometry shows that electrodeposition decomposes the Ni(bdt)2 assembly. Correlations between voltammetric and spectroscopic results indicate that the deposited material is active, i.e., that catalysis is heterogeneous rather than homogeneous. Control experiments establish that obtaining the observed catalytic response requires both Ni and the 1,2-benzenedithiolate ligand to be present during deposition.

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