Electrocatalytic hydrogen peroxide formation on mesoporous non-metal nitrogen-doped carbon catalyst

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• 作者：Fré ; dé ; ric Hasché ; ^a ; ^{frederic.hasche@tum.de" class="auth_mail" title="E-mail the corresponding author} ; Mehtap Oezaslan^a ; ^c ; Peter Strasser^a ; Tim-Patrick Fellinger^b
• 关键词：Electrochemical hydrogen peroxide formation ; Selectivity ; Mesoporous nitrogen-doped carbon ; Green synthesis ; Electrocatalysis ; Metal-free catalysis
• 刊名：Journal of Energy Chemistry
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：25
• 期：2
• 页码：251-257
• 全文大小：1056 K

文摘

Direct electrochemical formation of hydrogen peroxide (H₂O₂) from pure O₂ and H₂ on cheap metal-free earth abundant catalysts has emerged as the highest atom-efficient and environmentally friendly reaction pathway and is therefore of great interest from an academic and industrial point of view. Very recently, novel metal-free mesoporous nitrogen-doped carbon catalysts have attracted large attention due to the unique reactivity and selectivity for the electrochemical hydrogen peroxide formation 0001, 0002 and 0003. In this work, we provide deeper insights into the electrocatalytic activity, selectivity and durability of novel metal-free mesoporous nitrogen-doped carbon catalyst for the peroxide formation with a particular emphasis on the influence of experimental reaction parameters such as pH value and electrode potential for three different electrolytes. We used two independent approaches for the investigation of electrochemical hydrogen peroxide formation, namely rotating ring-disk electrode (RRDE) technique and photometric UV–VIS technique. Our electrochemical and photometric results clearly revealed a considerable peroxide formation activity as well as high catalyst durability for the metal-free nitrogen-doped carbon catalyst material in both acidic as well as neutral medium at the same electrode potential under ambient temperature and pressure. In addition, the obtained electrochemical reactivity and selectivity indicate that the mechanisms for the electrochemical formation and decomposition of peroxide are strongly dependent on the pH value and electrode potential.