TY - JOUR
T1 - An efficient and durable trifunctional electrocatalyst for zinc–air batteries driven overall water splitting
AU - Logeshwaran, Natarajan
AU - Ramakrishnan, Shanmugam
AU - Chandrasekaran, Selvaraj Selva
AU - Vinothkannan, Mohanraj
AU - Kim, Ae Rhan
AU - Sengodan, Sivaprakash
AU - Velusamy, Dhinesh Babu
AU - Varadhan, Purushothaman
AU - He, Jr Hau
AU - Yoo, Dong Jin
N1 - KAUST Repository Item: Exported on 2021-06-16
Acknowledgements: 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).
PY - 2021/6/1
Y1 - 2021/6/1
N2 - Constructing more active and durable trifunctional electrocatalysts is key for boosting overall water splitting and metal–air battery efficiency. Herein, we developed a trifunctional electrocatalyst of ultrafine Pt nanoparticles anchored on CoS2-N-doped reduced graphene oxide (Pt@CoS2-NrGO). Owing to its more Pt active sites with rapid ion/electron transport ability, the Pt@CoS2-NrGO shows excellent trifunctional activities towards HER (ƞ10 = 39 mV), OER (ƞ10 = 235 mV) ORR (E1/2 = 0.85 V vs. RHE) and water splitting device of Pt@CoS2-NrGO||Pt@CoS2-NrGO achieved cell voltage of 1.48 V at 10 mA cm−2, which is better than Pt-C||RuO2. Finally, we employed Pt@CoS2-NrGO as air cathode for zinc–air battery to display a power density of 114 mW cm-2 and durability of 55 h, outperforming than Pt-C + RuO2 based zinc–air batteries. For practical aspects, Pt@CoS2-NrGO based zinc–air batteries were connected to overall water splitting device to produce H2 and O2 gases for hydrogen fuel cell.
AB - Constructing more active and durable trifunctional electrocatalysts is key for boosting overall water splitting and metal–air battery efficiency. Herein, we developed a trifunctional electrocatalyst of ultrafine Pt nanoparticles anchored on CoS2-N-doped reduced graphene oxide (Pt@CoS2-NrGO). Owing to its more Pt active sites with rapid ion/electron transport ability, the Pt@CoS2-NrGO shows excellent trifunctional activities towards HER (ƞ10 = 39 mV), OER (ƞ10 = 235 mV) ORR (E1/2 = 0.85 V vs. RHE) and water splitting device of Pt@CoS2-NrGO||Pt@CoS2-NrGO achieved cell voltage of 1.48 V at 10 mA cm−2, which is better than Pt-C||RuO2. Finally, we employed Pt@CoS2-NrGO as air cathode for zinc–air battery to display a power density of 114 mW cm-2 and durability of 55 h, outperforming than Pt-C + RuO2 based zinc–air batteries. For practical aspects, Pt@CoS2-NrGO based zinc–air batteries were connected to overall water splitting device to produce H2 and O2 gases for hydrogen fuel cell.
UR - http://hdl.handle.net/10754/669580
UR - https://linkinghub.elsevier.com/retrieve/pii/S0926337321005312
UR - http://www.scopus.com/inward/record.url?scp=85107442892&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2021.120405
DO - 10.1016/j.apcatb.2021.120405
M3 - Article
SN - 0926-3373
VL - 297
SP - 120405
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
ER -
