A radical C−C-coupling reaction of acetonitrile into succinonitrile over hydrophobic TiO_(2) photocatalyst with enhanced catalytic activity was developed.In addition,the usage of a flow reactor further improved the ph...A radical C−C-coupling reaction of acetonitrile into succinonitrile over hydrophobic TiO_(2) photocatalyst with enhanced catalytic activity was developed.In addition,the usage of a flow reactor further improved the photon utilization efficiency for succinonitrile synthesis at room temperature.The space time yield of succinonitrile reached 55.59μmol/(g·h)over hydrophobic TiO_(2) catalyst,which was much higher than that of pristine TiO_(2)(4.23μmol/(g·h)).Mechanistic studies revealed that the hydrophobic modification of TiO_(2) promoted the separation and transfer of photogenerated carriers,as well as suppressed their recombination.Hydrophobic TiO_(2) also enhanced the adsorption of−CH3 of acetonitrile,thus facilitating the activation of C−H bond and the utilization efficiency of photocarriers.展开更多
电催化CO_(2)还原是一种能够实现碳减排并合成高附加值多碳产物乙醇的绿色新兴技术,但目前仍存在乙醇合成效率低的问题.为此,设计了一种具有针尖形貌的泡沫铜-镍材料用于电催化CO_(2)还原.该材料利用镍组分优异的CO生成能力与铜组分促进...电催化CO_(2)还原是一种能够实现碳减排并合成高附加值多碳产物乙醇的绿色新兴技术,但目前仍存在乙醇合成效率低的问题.为此,设计了一种具有针尖形貌的泡沫铜-镍材料用于电催化CO_(2)还原.该材料利用镍组分优异的CO生成能力与铜组分促进C—C偶联的特性,通过串联协同作用有效促进了乙醇的合成.在-0.6 V vs.Ag/AgCl电位下,该材料合成乙醇的法拉第效率达65%;经疏水处理抑制析氢副反应后,乙醇法拉第效率进一步提高至73%.展开更多
基金supported by the National Key R&D Program of China(2021YFF0500703)Natural Science Foundation of Shanghai(22JC1404200)+3 种基金Program of Shanghai Academic/Technology Research Leader(20XD1404000)Natural Science Foundation of China(U22B20136,22293023)Science and Technology Major Project of Inner Mongolia(2021ZD0042)the Youth Innovation Promotion Association of CAS。
文摘A radical C−C-coupling reaction of acetonitrile into succinonitrile over hydrophobic TiO_(2) photocatalyst with enhanced catalytic activity was developed.In addition,the usage of a flow reactor further improved the photon utilization efficiency for succinonitrile synthesis at room temperature.The space time yield of succinonitrile reached 55.59μmol/(g·h)over hydrophobic TiO_(2) catalyst,which was much higher than that of pristine TiO_(2)(4.23μmol/(g·h)).Mechanistic studies revealed that the hydrophobic modification of TiO_(2) promoted the separation and transfer of photogenerated carriers,as well as suppressed their recombination.Hydrophobic TiO_(2) also enhanced the adsorption of−CH3 of acetonitrile,thus facilitating the activation of C−H bond and the utilization efficiency of photocarriers.
文摘电催化CO_(2)还原是一种能够实现碳减排并合成高附加值多碳产物乙醇的绿色新兴技术,但目前仍存在乙醇合成效率低的问题.为此,设计了一种具有针尖形貌的泡沫铜-镍材料用于电催化CO_(2)还原.该材料利用镍组分优异的CO生成能力与铜组分促进C—C偶联的特性,通过串联协同作用有效促进了乙醇的合成.在-0.6 V vs.Ag/AgCl电位下,该材料合成乙醇的法拉第效率达65%;经疏水处理抑制析氢副反应后,乙醇法拉第效率进一步提高至73%.
