TY - GEN
T1 - Fabrication of Zn-Ni Alloy Columns with Low Hydrogen Evolution Overpotential as Efficient Electrocatalyst for H2Production
AU - Tseng, Yao Tien
AU - Clemente, Russell
AU - Lin, Jing Chie
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - In this study, steric Zn-Ni alloy columns were fabricated via microanode-guided electroplating (MAGE), which had a very small electrode gap (90 μm) and a very high deposition rate (> 2 μm/min). These microcolumns were used to produce hydrogen by the electrocatalytic decomposition of water in alkaline aqueous solutions of 1 M KOH. The surface morphology study was acquired via the SEM, and after numerous electrocatalytic reactions, the porous structure of the Zn-Ni alloy progressively developed on the surface. The amount of zinc present in the alloy fell from 91 at. % to 52 at. %, which resulted in the column diameter of Zn-Ni increasing from 248 to 300 μm. After conducting an XRD investigation, the primary structure of the Zn-Ni alloy microcolumn was determined to be that of an intermetallic compound belonging to the Zn-Ni series. The phases shifted from Ni3Zn22 to Ni2Zn11 and NiZn3 when the percentage of zinc in the alloy decreased from 91 to 52 at. %. The results of the linear sweep voltammetry showed that the Zn-Ni alloy microcolumns exhibited good hydrogen production efficiency at 13-24 at.% Ni, the lowest Tafel slope of 45 mV/dec, and only 36 mV overpotential when operating at 10 mA/cm2 current density. Because of the enormous number of nano-networked nickel hydroxide on the surface that was investigated by TEM, the excellent efficiency with which hydrogen was produced can be attributed to the fact that this resulted in a significant increase in the amount of electrochemical surface area available.
AB - In this study, steric Zn-Ni alloy columns were fabricated via microanode-guided electroplating (MAGE), which had a very small electrode gap (90 μm) and a very high deposition rate (> 2 μm/min). These microcolumns were used to produce hydrogen by the electrocatalytic decomposition of water in alkaline aqueous solutions of 1 M KOH. The surface morphology study was acquired via the SEM, and after numerous electrocatalytic reactions, the porous structure of the Zn-Ni alloy progressively developed on the surface. The amount of zinc present in the alloy fell from 91 at. % to 52 at. %, which resulted in the column diameter of Zn-Ni increasing from 248 to 300 μm. After conducting an XRD investigation, the primary structure of the Zn-Ni alloy microcolumn was determined to be that of an intermetallic compound belonging to the Zn-Ni series. The phases shifted from Ni3Zn22 to Ni2Zn11 and NiZn3 when the percentage of zinc in the alloy decreased from 91 to 52 at. %. The results of the linear sweep voltammetry showed that the Zn-Ni alloy microcolumns exhibited good hydrogen production efficiency at 13-24 at.% Ni, the lowest Tafel slope of 45 mV/dec, and only 36 mV overpotential when operating at 10 mA/cm2 current density. Because of the enormous number of nano-networked nickel hydroxide on the surface that was investigated by TEM, the excellent efficiency with which hydrogen was produced can be attributed to the fact that this resulted in a significant increase in the amount of electrochemical surface area available.
UR - http://www.scopus.com/inward/record.url?scp=85173597276&partnerID=8YFLogxK
U2 - 10.1109/NANO58406.2023.10231210
DO - 10.1109/NANO58406.2023.10231210
M3 - 會議論文篇章
AN - SCOPUS:85173597276
T3 - Proceedings of the IEEE Conference on Nanotechnology
SP - 904
EP - 908
BT - 2023 IEEE 23rd International Conference on Nanotechnology, NANO 2023
PB - IEEE Computer Society
T2 - 23rd IEEE International Conference on Nanotechnology, NANO 2023
Y2 - 2 July 2023 through 5 July 2023
ER -
