Boosting CeO2/Co3O4 Heterojunctions Acidic Oxygen Evolution via Promoting OH Coverage
Source abstract
Abstract
Developing nonprecious metal catalysts with excellent activity and durability for the oxygen evolution reaction (OER) in acidic media is essential for the production of hydrogen from proton-exchange membranes (PEMs). However, challenges remain due to the lack of activity and stability of catalysts for OERs. Here, we report that a carbon-coated CeO 2 /Co 3 O 4 heterojunction has a lower overpotential of 425 mV at 10 mA cm –2 than CeO 2 /Co 3 O 4 (489 mV), and Co 3 O 4 (506 mV). Moreover, stability is observed for 50 h. Using in situ electrochemical impedance spectroscopy, the carbon cladding was found to increase the OH coverage and prevent acid corrosion, thereby improving the activity and stability. This provides a pathway for designing nonprecious acidic OER catalysts.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Electrocatalysts for Energy Conversion · Fuel Cells and Related Materials · Advanced battery technologies research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, P. R. China
School of Electronics and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, P. R. China
Funding
China Postdoctoral Science Foundation · National Natural Science Foundation of China
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