Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 5, Issue 10, Pages 8912-8916Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ee22611a
Keywords
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Funding
- Nanyang Technological University (NTU), Center for Artificial Photosynthesis (CAP)
- French embassy in Singapore [4.03.11]
- French National Research Agency (ANR) [NiFe-Cat ANR-10-BLAN-711]
- FP7 CEA-Eurotalents COFUND program
- CEA program on Advanced Materials
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A new inorganic solid state electrocatalyst for the hydrogen evolution reaction (HER) is reported. Highly crystalline layered ternary sulfide copper-molybdenum- sulfide (Cu2MoS4) was prepared by a simple precipitation method from Cu-I and [MoS4](2-) precursors. In aqueous solution and over a wide pH range (pH 0 to 7), this Cu2MoS4 showed very good catalytic activity for HER with an overvoltage requirement of only ca. 135 mV and an apparent exchange current density of 0.040 mA cm(-2) (Tafel slope of ca. 95 mV per decade was found irrespective of the pH value). This Cu2MoS4 catalyst was found to be stable during electrocatalytic hydrogen generation. Therefore, it represents an attractive alternative to platinum.
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