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Updated: Jan 20, 2026

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Published on: November 2, 2011
Thin NiFeCr-LDHs nanosheets promoted by g-C3N4: a highly active electrocatalyst for oxygen evolution reaction
Gui Chen1,2, Jiang Liu1,2, Ying Li1,2
1Key Laboratory of Applied Surface and Colloid Chemistry (Shaanxi Normal University), Ministry of Education, Xi'an, 710119, People's Republic of China.
None:
NiFeCr layered double hydroxides (NiFeCr-LDHs) supported on graphitic carbon nitride (g-C3N4) hybrids (NiFeCr-LDHs/g-C3N4) are synthesized and used as an electrocatalyst for oxygen evolution reaction (OER) in alkaline media. Effect of g-C3N4 on the structure and OER performance of NiFeCr-LDHs are investigated in detail. g-C3N4 can promote the formation of thin NiFeCr-LDHs nanosheets, thereby enhancing both the number of active sites and OER activity. X-ray photoelectron spectra measurements confirm the electronic interaction between g-C3N4 and NiFeCr-LDHs nanosheets. The OER performance of NiFeCr-LDHs/g-C3N4 hybrids highly relates to the weight ratio of g-C3N4 to NiFeCr-LDHs. When the weight ratio of g-C3N4 to NiFeCr-LDHs is 5%, the corresponding electrocatalyst shows the best OER activity. The component optimized NiFeCr-LDHs/g-C3N4 hybrids display the overpotential of ∼223 mV at 10 mA cm-2 and Tafel slope of 89 mV dec-1 for OER in 1 M KOH solution, which is better than that of pristine NiFeCr-LDHs, bare g-C3N4, and commercial RuO2.
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