TY - JOUR
T1 - In-situ probing polarization-induced stability of single-atom alloy electrocatalysts in metal-air battery via synchrotron-based X-ray diffraction
AU - Balamurugan, Chandran
AU - Kim, Young Yong
AU - Jo, Yong Ryun
AU - Cho, Kyusang
AU - Park, Byoungwook
AU - Kim, Woochul
AU - Lim, Namsoo
AU - Pak, Yusin
AU - Kim, Hyeonghun
AU - Lee, Hyeonryul
AU - Chae, Keun Hwa
AU - Shim, Ji Hoon
AU - Lee, Changhoon
AU - Kwon, Sooncheol
N1 - Publisher Copyright:
© 2024 The Authors
PY - 2024/9/15
Y1 - 2024/9/15
N2 - In this work, a novel single-atom alloy electrocatalyst (SAAE) was developed for enhanced electrocatalysis in next-generation energy technologies. The catalyst, composed of single-atom Rh and bulk Ni on FeV3O8 support, overcomes challenges related to stability and efficiency in electrochemical reactions. The work function difference between Rh and Ni, as confirmed by computational and synchrotron-based analysis, facilitates superior electric polarization and ohmic contact with FeV3O8. The FeV3O8@RhNi demonstrates outstanding performance in oxygen reduction reactions (ORRs) and oxygen evolution reactions (OERs), with high half-wave potential (0.90 V) and low overpotential (120 mV at 10 mA cm−2). In zinc-air batteries, it maintains a stable discharge–charge voltage gap, specific capacity of 810 mAh g−1, peak power density of 186 mW cm−2 at 320 mA cm−2, and cycle stabilities exceeding 859 h at 10 mA cm−2. The catalyst also proves its durability in flexible zinc–air batteries, indicating its potential for efficient electrocatalytic reactions in emerging energy technologies.
AB - In this work, a novel single-atom alloy electrocatalyst (SAAE) was developed for enhanced electrocatalysis in next-generation energy technologies. The catalyst, composed of single-atom Rh and bulk Ni on FeV3O8 support, overcomes challenges related to stability and efficiency in electrochemical reactions. The work function difference between Rh and Ni, as confirmed by computational and synchrotron-based analysis, facilitates superior electric polarization and ohmic contact with FeV3O8. The FeV3O8@RhNi demonstrates outstanding performance in oxygen reduction reactions (ORRs) and oxygen evolution reactions (OERs), with high half-wave potential (0.90 V) and low overpotential (120 mV at 10 mA cm−2). In zinc-air batteries, it maintains a stable discharge–charge voltage gap, specific capacity of 810 mAh g−1, peak power density of 186 mW cm−2 at 320 mA cm−2, and cycle stabilities exceeding 859 h at 10 mA cm−2. The catalyst also proves its durability in flexible zinc–air batteries, indicating its potential for efficient electrocatalytic reactions in emerging energy technologies.
KW - Flexible metal-air battery
KW - In-situ Raman spectra
KW - In-situ synchrotron-based analysis
KW - ORR/OER and HER
KW - Reversible electrochemical reaction
KW - Single-atom alloy electrocatalysts
UR - http://www.scopus.com/inward/record.url?scp=85190871292&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2024.124072
DO - 10.1016/j.apcatb.2024.124072
M3 - Article
AN - SCOPUS:85190871292
SN - 0926-3373
VL - 353
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
M1 - 124072
ER -