兴奋剂
电化学
法拉第效率
化学
电流密度
氢
碳纤维
电导率
密度泛函理论
可逆氢电极
电子转移
材料科学
无机化学
化学工程
纳米技术
电极
物理化学
计算化学
有机化学
光电子学
复合数
物理
参比电极
量子力学
复合材料
工程类
作者
Chunjun Chen,Xiaofu Sun,Xupeng Yan,Yahui Wu,Huizhen Liu,Qinggong Zhu,Bernard Baffour Asare Bediako,Buxing Han
标识
DOI:10.1002/ange.202004226
摘要
Abstract Electroreduction of CO 2 to CO powered by renewable electricity is a possible alternative to synthesizing CO from fossil fuel. However, it is very hard to achieve high current density at high faradaic efficiency (FE). Here, the first use of N,P‐co‐doped carbon aerogels (NPCA) to boost CO 2 reduction to CO is presented. The FE of CO could reach 99.1 % with a partial current density of −143.6 mA cm −2 , which is one of the highest current densities to date. NPCA has higher electrochemical active area and overall electronic conductivity than that of N‐ or P‐doped carbon aerogels, which favors electron transfer from CO 2 to its radical anion or other key intermediates. By control experiments and theoretical calculations, it is found that the pyridinic N was very active for CO 2 reduction to CO, and co‐doping of P with N hinder the hydrogen evolution reaction (HER) significantly, and thus the both current density and FE are very high.
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