Water oxidation electrocatalysis with iron oxide nanoparticles prepared via laser ablation

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• 作者：Erica Pizzolato^a ; ^b ; Stefano Scaramuzza^a ; Francesco Carraro^a ; Alessia Sartori^a ; Stefano Agnoli^a ; Vincenzo Amendola^a ; ^{vincenzo.amendola@unipd.it" class="auth_mail" title="E-mail the corresponding author} ; Marcella Bonchio^a ; ^b ; Andrea Sartorel^a ; ^b ; ^{andrea.sartorel@unipd.it" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Water oxidation ; Electrocatalysis ; Iron oxide ; Laser ablation ; Nanoparticles
• 刊名：Journal of Energy Chemistry
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：25
• 期：2
• 页码：246-250
• 全文大小：1046 K

文摘

Iron oxide nanoparticles (FeO_x NPs, 5–30 nm size) prepared via laser ablation in liquid were supported onto Indium Tin Oxide conductive glass slides by magnetophoretic deposition (MD) technique. The resulting FeO_x@ITO electrodes are characterized by a low amount of iron coverage of 16–50 nmol/cm², and show electrocatalytic activity towards water oxidation in neutral phosphate buffer pH 7 with 0.58 V overpotential and quantitative Faradaic efficiency towards oxygen production. XPS analysis on the oxygen region of the FeO_x films reveals a substantial hydration of the surface after catalysis, recognized as a crucial step to access reactivity.