Nitrogen-doped graphene encapsulated FeCoMoS nanoparticles as advanced trifunctional catalyst for water splitting devices and zinc–air batteries

Shanmugam Ramakrishnan, Jayaraman Balamurugan, Vinothkannan Mohanraj, Ae Rhan Kim, Sivaprakash Sengodan, Dong Jin Yoo

Research output: Contribution to journalArticlepeer-review

173 Citations (Scopus)


Emerging demands for the highly active, durable, and cost-effective trifunctional catalysts for overall water splitting and metal–air batteries in the scientific community. Herein, a novel strategy is demonstrated for the rational design of hierarchical iron cobalt molybdenum sulfide nanoflower encapsulated in nitrogen doped graphene (FeCoMoS@NG) through a facile, cost-effective, and single-step in-situ hydrothermal process. Owing to its hierarchical nanostructures, larger specific surface area, and exclusive porous networks, the optimal FeCoMoS@NG shows excellent catalytic activities for OER ƞ10 = 238 mV, HER ƞ10 = 137 mV, and ORR (0.83 V vs RHE). Most significantly, FeCoMoS@NG||FeCoMoS@NG water splitting device achieves a cell voltage of 1.58 V at 10 mA cm −2. Furthermore, FeCoMoS@NG based zinc–air battery endows a high power density of 118 mW cm −2, and overall water splitting was successfully driven by FeCoMoS@NG based zinc–air battery. This work provides new pathway for designing highly active and durable multifunctional catalysts for energy conversion and storage applications.

Original languageEnglish
Article number119381
Number of pages13
JournalApplied Catalysis B: Environmental
Early online date3 Aug 2020
Publication statusPublished - 15 Dec 2020
Externally publishedYes


This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (NRF-2020R1A2B5B01001458). This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 20184030202210). This work was financially supported by grants from the Medical Research Center Program (NRF-2017R1A5A2015061) through the National Research Foundation (NRF), which is funded by the South Korean government (MSIP).


  • Transition metal chalcogenides
  • Trifunctional catalyst
  • Oxygen reduction reaction
  • Overall water splitting
  • Zinc–air batteries

ASJC Scopus subject areas

  • Environmental Science(all)
  • Process Chemistry and Technology
  • Catalysis


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