Bacteriorhodopsin/Ag
Nanoparticle-Based Hybrid Nano-Bio
Electrocatalyst for Efficient and Robust H<sub>2</sub> Evolution from
Water
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Abstract
Searching for novel hybrid electrocatalysts
with high activity
and strong durability for a direct electrochemical hydrogen evolution
reaction (HER) is extremely desirable but still remains a significant
challenge. Herein, we report a novel solid carbon cloth-supported
hybrid nano-bio electrocatalyst, decorated with Ag nanoparticles and
proton-pumping bacteriorhodopsin (bR) (Ag/bR/CP) that were prepared
by in situ electroless deposition and vesicle fusion technology, respectively.
When applied as a hydrogen evolution cathode, the Ag/bR/CP shows a
low onset overpotential of 63 mV, good durability (no detectable change
in its catalytic activity for up to 1000 cycles in alkaline media),
and enhanced HER performance under 550 nm irradiation, attributed
to the activation of Ag and synergistic effects following light absorption,
demonstrated by photoelectrochemical measurements