Development of the system of selective alcohol production from carbon dioxide

二氧化碳选择性生产酒精系统的开发

• 批准号: 02805107
• 负责人: HASHIMOTO Kazuhito
• 金额: $ 0.96万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02805107/
• 关键词: carbon dioxide; Alcohol; Compound Semiconductor; Hydrogen absorbing electrode; Surface design; 水素吸蔵材料; パラジウム; 炭酸ガス還元; 銅電極; 酸化銅; SiC

The photoelectrochemical reduction of CO_2 has been examined on the amorphous p-SiC thin film electrode, prepared by Mercury sensitized Photo-CVD, in aqueous electrolytes at room temperature. Although 80% of the photocurrent was used for reduction of proton(hydrogen production), Methanol was selectively obtained as the CO_2 reduction product with a current efficiency of up to 18% at -1.5V vs SCE. Small quantities of CO and CH_4 were also obtained.The electrochemical Carbon dioxide reduction was also c. -)ne using one of the hydrogen-storing materials, Pd. The faradaic efficiencies for CO and HCOOH production increased after hydrogen was absorbed into the Pd electrode. This was due to the increase of the electivity for CO_2 reduction resulting from suppression of hydrogen production and/or the increase of actual reaction rates for CO and HCOOH production.

采用汞敏化光化学气相沉积法制备了非晶态p-SiC薄膜电极，在室温下对CO_2进行了光电化学还原。虽然80%的光电流用于质子还原（制氢），但在-1.5V vs SCE下，甲醇作为CO_2还原产物选择性地获得，电流效率高达18%。还得到了少量的CO和CH_4。利用其中一种储氢材料Pd，电化学还原二氧化碳也是c. - ne。钯电极吸收氢后，CO和HCOOH的法拉第效率提高。这是由于抑制了产氢和/或提高了CO和HCOOH的实际反应速率，从而提高了CO_2还原的选择性。

项目成果

J.Luo,K.Hashimoto,A.Fujishima: "Photoelectrochemical Reduction of Carbon Dioxide at Illuminated pーtype Capper oxide Electrode" Ber.Bumsenges.Phys.Chem.

J.Luo、K.Hashimoto、A.Fujishima：“在照明 p 型 Capper 氧化物电极上光电化学还原二氧化碳”Ber.Bumsenges.Phys.Chem。

K. Hashimoto: " "Methanol production from carbon dioxide at illuminated p-type umorphous sic film electrode"" J. Electroanal. Chem.

K. Hashimoto：““在照明 p 型非晶碳化硅薄膜电极上从二氧化碳生产甲醇””J. Electroanal。

K. Ohkawa: " "Electrochemical Reduction of Carbon dioxide on Pd electrode : The effect of hydrogen absorption on electrochemical activity"" J. Eleetroanal. Chem.

K. Ohkawa：““二氧化碳在 Pd 电极上的电化学还原：氢吸收对电化学活性的影响””J. Eleetroanal。