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Effect of Cobalt Composition on Electrochemical Behavior of Platinum-Based Catalyst towards Hydrogen Evolution Reaction
Duc Thanh Nguyen1, Hang Thi Thuy Nguyen1, Hung Cam Ly1 and An Thi Xuan Duong1*
1Ho Chi Minh City University of Natural Resources and Environment (HCMUNRE), Ho Chi Minh City, 700000, Viet Nam
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Abstract:
The hydrogen production from water electrolysis is of interest as a renewable energy generation technology. However, the high price of noble platinum (Pt) catalysts for the hydrogen evolution reaction (HER) is a big challenge to use it. Herein, we fabricate cost-effective CoPt bimetallic alloys and explore the effect of Co composition on the electrochemical behavior of such alloys, which has been rarely reported. A series of Co1-xPtx (x = 0.25; 0.5; 0.75) alloys are prepared via a room-temperature chemical reduction route without using any surfactants/stabilizers that exhibit a uniform distribution in small particle sizes (ca. 3 nm) on the carbon surface. In terms of the HER, the incorporation of a suitable Co proportion into the Pt lattices enhance significantly the HER performance in an acidic environment. For instance, the Co0.5Pt0.5 NPs/C catalyst displays a low onset potential (16.67 mV) and a small Tafel slope (19.60 mV dec-1), which is different from other Co1-xPtx catalysts and commercial C-supported Pt (NPs) catalyst. This research result not only supplies a facile strategy to synthesize alloys but also guides the choice of a suitable proportion of transition metal into Pt lattice for electrochemical reactions in green energy storage and conversion technologies.
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Keywords: Binary alloys, Hydrogen evolution reaction, Electrocatalyst, Green energy
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Received:N/A; Revised:N/A; Accepted:N/A; Published:June 30, 2022
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*Corresponding author; e-mail: cplab.hcmunre@gmail.com
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Citation:Thanh, D.; Thi, H.; Cam, H.; Thi, A.Effect of Cobalt Composition on Electrochemical Behavior of Platinum-Based Catalyst towards Hydrogen Evolution Reaction. Applied Functional Materials 2022, 2, 1-6. https://doi.org/10.35745/afm2022v02.02.0001
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Copyright: ©
2022
The Author(s). Published with license by IIKII, Singapore. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (CC BY), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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