塔菲尔方程
材料科学
镍
铜
石墨烯
电化学
无机化学
分解水
电催化剂
冶金
电极
化学工程
化学
纳米技术
催化作用
生物化学
光催化
工程类
物理化学
作者
In‐Hwan Oh,Jong-Chan Youn,Hee Sun Kang,Kovendhan Manavalan,Sang‐Chul Jung,Young-Kwon Park,Ki‐Joon Jeon
出处
期刊:Carbon
[Elsevier]
日期:2020-05-01
卷期号:161: 665-673
被引量:10
标识
DOI:10.1016/j.carbon.2020.02.005
摘要
Water splitting from wastewater has been in the limelight because it has advantages which are hydrogen production and electrochemical oxidation at the same time. For efficient water splitting even in wastewater condition, water splitting electrodes should have cost-effectiveness and high durability. Here, we fabricated highly stable and electrocatalytic graphene on copper-nickel alloy to electrochemically produce hydrogen from wastewater in presence of carbon layer between nickel and copper. The electrode fabrication was performed by alloying the copper with nickel and growing graphene on the surface at the same time. The copper and nickel contents of electrode surface were kept by carbon layer hindering the metal diffusion at high temperature. Highly electrocatalytic activity (onset potential = 95 and 158 mV, Tafel slope = 58 and 80 mV dec−1), high durability and pH independence of graphene on copper-nickel alloy were confirmed in acidic and alkaline wastewater containing formaldehyde.
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