Iron vs Aluminum Based Layered Double Hydroxides as Water Splitting Catalysts

详细信息    查看全文

• 作者：Ylea Vlamidis^a ; Erika Scavetta^a ; Massimo Gazzano^b ; Domenica Tonelli^a ; ¹ ; ^{domenica.tonelli@unibo.it" class="auth_mail" title="E-mail the corresponding author}
• 关键词：OER ; Layered Double Hydroxides ; glassy carbon ; platinum ; electrosynthesis
• 刊名：Electrochimica Acta
• 出版年：2016
• 出版时间：10 January 2016
• 年：2016
• 卷：188
• 期：Complete
• 页码：653-660
• 全文大小：1973 K

文摘

This paper describes the electrosynthesis, characterization and electrocatalytic properties towards oxygen evolution reaction (OER) of four layered double hydroxides (LDHs) containing cobalt or nickel as divalent cation and aluminum or iron as trivalent metal. The electrochemical behaviour of the LDH modified electrodes was studied by cyclic voltammetry (CV), and the LDHs were characterized by XRD and SEM/EDS. Two materials, i.e., platinum and glassy carbon (GC), were investigated as electrode supports recording polarization and chronopotentiometric curves, with a rotating disk electrode in alkaline solutions. LDHs containing iron exhibited higher activity for OER and all the materials showed a good stability and durability in alkaline media. When GC was used as electrode support the performances of the OER catalysts resulted to be even better than those exhibited by the same LDHs electrodeposited on Pt.