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Pedireddy et al_Unlocking the potential of single atoms loaded Geobacter hybrid catalyst as bifunctional electrocatalyst for water splitting.pdf (3.58 MB)

Unlocking the Potential of Single Atoms Loaded Geobacter Hybrid Catalyst as Bifunctional Electrocatalyst for Water Splitting

submitted on 09.07.2020, 17:48 and posted on 10.07.2020, 12:32 by Srikanth Pedireddy, Mahesh Kumar Ravva, Chandrani Nayak, Dalaver Anjum, Shambhu Nath Jha, Pascal Elias Saikaly
Here, we report a reproducible method for the synthesis of SA-Ms on the surface of the electroactive bacterium, Geobacter sulfurreducens (GS). Our approach is based on the extracellular electron transfer capability of GS to reduce extracellular metal ions by harvesting the metabolically formed electrons inside the cell. The formation of SA-Ms on the surface of GS was achieved by creating an MN3 moiety (where M=Ir, Pt, Co, Ru, Cu, and Pd, and N = nitrogen), identified by X-ray absorption fine structure analysis. Interestingly, our bio-derived SA-M@GS can be directly used as OER and HER electrocatalysts upon drying without further heat treatments such as pyrolysis or hydrothermal approaches.


This work was supported by Competitive Research Grant (URF/ 1/2985-01-01) from KAUST to PES.


Email Address of Submitting Author


King Abdullah University of Science and Technology


Saudi Arabia

ORCID For Submitting Author


Declaration of Conflict of Interest

The authors declare no conflict of interest.