Value added transformation of ubiquitous substrates into highly efficient and flexible electrodes for water splitting

Atharva Sahasrabudhe, Harsha Dixit, Rahul Majee and Sayan Bhattacharyya ()
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Atharva Sahasrabudhe: Indian Institute of Science Education and Research (IISER) Kolkata
Harsha Dixit: Indian Institute of Science Education and Research (IISER) Kolkata
Rahul Majee: Indian Institute of Science Education and Research (IISER) Kolkata
Sayan Bhattacharyya: Indian Institute of Science Education and Research (IISER) Kolkata

Nature Communications, 2018, vol. 9, issue 1, 1-14

Abstract: Abstract Herein, we present an innovative approach for transforming commonly available cellulose paper into a flexible and catalytic current collector for overall water splitting. A solution processed soak-and-coat method of electroless plating was used to render a piece of paper conducting by conformably depositing metallic nickel nanoparticles, while still retaining the open macroporous framework. Proof-of-concept paper-electrodes are realized by modifying nickel-paper current collector with model electrocatalysts nickel-iron oxyhydroxide and nickel-molybdenum bimetallic alloy through electrodeposition route. The paper-electrodes demonstrate exceptional activities towards oxygen evolution reaction and hydrogen evolution reaction, requiring overpotentials of 240 and 32 mV at 50 and −10 mA cm−2, respectively, even as they endure extreme mechanical stress. The generality of this approach is demonstrated by fabricating similar electrodes on cotton fabric, which also show high activity. Finally, a two-electrode paper-electrolyzer is constructed which can split water with an efficiency of 98.01%, and exhibits robust stability for more than 200 h.

Date: 2018
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DOI: 10.1038/s41467-018-04358-7

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