TY - JOUR
T1 - NiCo2Se4 Nanowires as a High-Performance Bifunctional Oxygen Electrocatalyst
AU - Sancho, Hugo
AU - Zhang, Yi
AU - Liu, Lindong
AU - Barevadia, Vikas G.
AU - Wu, Shaoyang
AU - Zhang, Yamin
AU - Huang, Po Wei
AU - Zhang, Yifan
AU - Wu, Tzu Ho
AU - You, Wenqin
AU - Liu, Nian
N1 - Publisher Copyright:
© 2020 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited.
PY - 2020/1/4
Y1 - 2020/1/4
N2 - Rechargeable zinc-air batteries are attracting great attention due to their high theoretical specific energy, safety, and economic viability. However, their performance and large-scale practical applications are largely limited by poor durability and high overpotential on the air-cathode due to the slow kinetics of the oxygen evolution and reduction reactions (OER/ORR). Therefore, it is highly desired to develop new bifunctional catalysts to improve the OER and ORR kinetics. In this paper, NiCo2Se4 nanowires were uniformly grown on carbon fiber paper (CFP) for the first time. With an overpotential for OER of 327 mV, NiCo2Se4 nanowires show a better performance than RuO2 (350 mV) and a high stability. Moreover, their half-wave potential of 0.77 V and limiting current density of 3.75 mA•cm-2 make it a promising non-precious-metal catalyst for ORR, with performance close to Pt/C (0.87 V, 3.7 mA•cm-2). The excellent performance is attributed to the nanowire morphology with efficient 1D electronic pathways, high conductivity of NiCo2Se4 and an enhanced electronic structure, thanks to a mixed valence of nickel and cobalt ions.
AB - Rechargeable zinc-air batteries are attracting great attention due to their high theoretical specific energy, safety, and economic viability. However, their performance and large-scale practical applications are largely limited by poor durability and high overpotential on the air-cathode due to the slow kinetics of the oxygen evolution and reduction reactions (OER/ORR). Therefore, it is highly desired to develop new bifunctional catalysts to improve the OER and ORR kinetics. In this paper, NiCo2Se4 nanowires were uniformly grown on carbon fiber paper (CFP) for the first time. With an overpotential for OER of 327 mV, NiCo2Se4 nanowires show a better performance than RuO2 (350 mV) and a high stability. Moreover, their half-wave potential of 0.77 V and limiting current density of 3.75 mA•cm-2 make it a promising non-precious-metal catalyst for ORR, with performance close to Pt/C (0.87 V, 3.7 mA•cm-2). The excellent performance is attributed to the nanowire morphology with efficient 1D electronic pathways, high conductivity of NiCo2Se4 and an enhanced electronic structure, thanks to a mixed valence of nickel and cobalt ions.
UR - http://www.scopus.com/inward/record.url?scp=85082393605&partnerID=8YFLogxK
U2 - 10.1149/1945-7111/ab69f9
DO - 10.1149/1945-7111/ab69f9
M3 - 文章
AN - SCOPUS:85082393605
SN - 0013-4651
VL - 167
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
IS - 5
M1 - 056503
ER -
