TY - JOUR
T1 - Au nanocluster coupling with Gd-Co2B nanoflakes embedded in reduced TiO2 nanosheets
T2 - Seawater electrolysis at low cell voltage with high selectivity and corrosion resistance
AU - Haq, Tanveer ul
AU - Pasha, Mujaheed
AU - Tong, Yongfeng
AU - Mansour, Said A.
AU - Haik, Yousef
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2022/2
Y1 - 2022/2
N2 - Seawater electrolysis offers a promising technology for environmental remediation and mass production of sustainable hydrogen. However, intricated synthetic routes, limited oxygen selectivity, and electrode corrosion severely hamper the practical viability of this technology. Here, we designed an effective strategy to assemble interface-rich, Au NCs decorated Gd-Co2B nanoflakes embedded in TiO2 nanosheets grown on Ti foil (Au-Gd-Co2B@TiO2) to meet the multiple needs of electrodes for seawater electrolysis. Benefiting from the high electrical conductivity, superior intrinsic activity, and improved transfer coefficient, this free-standing, Au-Gd-Co2B@TiO2 electrocatalyst demonstrates outstanding performance towards overall seawater splitting needing a small overpotential of 510 mV to attain a geometric activity of 1000 mAcm−2 in alkaline seawater. The higher activity and specificity of Au-Gd- Co2B@TiO2 are credited to the oxygen vacancies and the presence of the Co-Au surface. Furthermore, its super hydrophilic-aerophobic features, improved corrosion resistance, and impressive durability reveal its practical viability for actual seawater electrolysis.
AB - Seawater electrolysis offers a promising technology for environmental remediation and mass production of sustainable hydrogen. However, intricated synthetic routes, limited oxygen selectivity, and electrode corrosion severely hamper the practical viability of this technology. Here, we designed an effective strategy to assemble interface-rich, Au NCs decorated Gd-Co2B nanoflakes embedded in TiO2 nanosheets grown on Ti foil (Au-Gd-Co2B@TiO2) to meet the multiple needs of electrodes for seawater electrolysis. Benefiting from the high electrical conductivity, superior intrinsic activity, and improved transfer coefficient, this free-standing, Au-Gd-Co2B@TiO2 electrocatalyst demonstrates outstanding performance towards overall seawater splitting needing a small overpotential of 510 mV to attain a geometric activity of 1000 mAcm−2 in alkaline seawater. The higher activity and specificity of Au-Gd- Co2B@TiO2 are credited to the oxygen vacancies and the presence of the Co-Au surface. Furthermore, its super hydrophilic-aerophobic features, improved corrosion resistance, and impressive durability reveal its practical viability for actual seawater electrolysis.
KW - Au nanocluster
KW - Nanoflakes embedded nanosheets
KW - Seawater electrolysis
KW - Self-supported electrocatalyst
KW - Transition metals boride
UR - http://www.scopus.com/inward/record.url?scp=85117783443&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2021.120836
DO - 10.1016/j.apcatb.2021.120836
M3 - Article
AN - SCOPUS:85117783443
SN - 0926-3373
VL - 301
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
M1 - 120836
ER -