Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 6, Issue 16, Pages 13406-13412Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am501216b
Keywords
Co(OH)(2); photocatalytic H-2 evolution; surface photovoltage; photogenerated charge transfer; CdS; surface photocurrent
Funding
- Nation Basic Research program of china (973 program) [2013CB632403]
- National Natural Science Foundation of China [21173103, 51172090]
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Cobalt hydroxide/cadmium sulfide composite was prepared using an easy coprecipitation strategy. The field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) confirmed that Co(OH)(2) nanometer particles were modified on CdS. Even without noble-metal cocatalyst, the photocatalytic H-2 evolution over CdS after Co(OH)(2) loaded was evidently increased. The most excellent Co(OH)(2) of 6.8 mol %, resulted in a H-2 generation rate of 61 pmol h g, which exceeded that of pure CdS by a factor of 41 times. Surface photovoltage (SPV) and surface photocurrent (SPC) investigations revealed that the photogenerated electrons could be captured by the loaded Co(OH)(2) nanoparticles. The interface formed between Co(OH)(2) and CdS is vital to the enhancement of photocatalytic H-2 generation. Electrochemical measurement results indicated that another reason for the enhanced photocatalytic activity of Co(OH)(2)/CdS catalyst is that Co(OH)(2) has outstanding H-2 generation activity.
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