石墨烯
催化作用
甲醛
氧气
化学
电化学
吸附
石墨
无机化学
化学工程
光化学
材料科学
纳米技术
有机化学
电极
物理化学
工程类
作者
Yinyin Wang,Lang Qin,Cong Cao,Zhigang Geng,Jie Zeng,Jun Bao
标识
DOI:10.1002/cnma.202300063
摘要
Abstract The conversion of electrocatalytic small molecules into high value‐added chemicals is a green and sustainable path to reduce energy consumption in traditional industrial production paths. In order to explore the relationship between oxygen function groups in the catalysts and their catalysis behavior, we prepared graphene‐based catalysts with different oxygen densities for formaldehyde reduction reaction by adjusting the content of oxygen‐containing functional groups on the graphene surface. We found that oxygen‐rich graphene (oGO) exhibited the highest activity as well as selectivity for the electroreduction of formaldehyde to 1,2‐propanediol (1,2‐PDO). Compared with graphite sheets and reduced graphene (rGO), the oGO exhibit the highest 1,2‐PDO Faradaic efficiency (FE) of 27.4% with partial current density of 13.7 mA cm −2 at pH 7. In‐situ attenuated total reflection infrared spectroscopy (ATR‐IR) confirms that the increased content of oxygen‐containing groups on the catalyst surface promotes the adsorption and enrichment of ⋅H 2 CO, which in turn facilitates the coupling reaction to form 1,2‐PDO. This work provides a new vision for the catalyst design in the electrochemical conversion reaction from formaldehyde to 1,2‐PDO.
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