过渡金属修饰的Cu箔对CO_2电化学还原性能影响
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- 英文论文题名：The influence of transition metal modification on Cu foil in electroreduction of CO_2
- 论文作者：刘莉 ; 田娜 ; 黄龙 ; 洪宇浩 ; 谢爱云 ; 张凤阳 ; 周志有 ; 孙世刚
- 英文论文作者：Liu Li ; Tian Na ; Huang Long ; Hong Yu-Hao ; Xie Ai-Yun ; Zhang Feng-Yang ; Zhou Zhi-You ; Sun Shi-Gang ; Department of Chemistry ; Xiamen University
- 年：2016
- 作者机构：厦门大学化学化工学院;
- 论文关键词：二氧化碳还原 ; 过渡金属修饰 ; 煅烧还原预处理铜 ; 恒电位沉积 ; 还原选择性
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十九分会：电化学材料
- 语种：中文
- 分类号：O643.3;O646
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十九分会 ; 电化学材料
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：242k
- 原文格式：D
- 会议级别：全国
摘要
化石燃料的过度利用导致温室效应和能源短缺问题的出现,电催化CO_2还原凭借其绿色环保易于调控的优点成为最有效的解决方法之一。我们采用恒电位沉积的方法对氧化后再还原的铜片表面进行Ni、Zn、Au修饰,研究其对CO_2还原选择性以及还原产物的影响。这种煅烧氧化后再经过电化学还原而得的Cu箔具有较高的CO_2还原催化活性~([1]),对其进行金属修饰有望提高其CO_2还原选择性。Ni的修饰能提高对甲酸以及醇类的选择性,在-1.5 V(vs SCE)下得到34.3%的液相产物库伦效率,Zn的修饰使得氧化物还原制得的Cu催化还原CO_2对甲酸选择性降低,但是提高了对醇类的选择性。Au的修饰则明显降低了对甲酸以及醇类的选择性。
Over consumption of fossil fuels cause greenhouse effect and energy shortage. Electroreduction of CO_2 has become the most promising solution to these problems. Ni、Zn、Au was modified on oxide-derived Cu to optimize the selection of CO_2 reduction. The experimental results suggested that modification of Ni increased Faraday efficiency of formic acid and alcohols. The Faraday efficiency of liquid products was up to 34.3% at-1.5 V versus saturated calomel electrode(vs SCE). The modification of Zn reduced the formic acid efficiency but enhanced the alcohols efficiency slightly, and the modification of Au suppresses the selection of formic acid and alcohols.
Over consumption of fossil fuels cause greenhouse effect and energy shortage. Electroreduction of CO_2 has become the most promising solution to these problems. Ni、Zn、Au was modified on oxide-derived Cu to optimize the selection of CO_2 reduction. The experimental results suggested that modification of Ni increased Faraday efficiency of formic acid and alcohols. The Faraday efficiency of liquid products was up to 34.3% at-1.5 V versus saturated calomel electrode(vs SCE). The modification of Zn reduced the formic acid efficiency but enhanced the alcohols efficiency slightly, and the modification of Au suppresses the selection of formic acid and alcohols.
引文
[1]C.W.Li.;M.W.Kanan.;J.Am.Chem.Soc.,2012,134:7231-7234.