...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Catalysis science & technology >CO2 electrochemical reduction at thiolate-modified bulk Au electrodes
【24h】

CO2 electrochemical reduction at thiolate-modified bulk Au electrodes

机译：在thiolate-modified二氧化碳电化学还原大部分非盟电极

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Electrochemical reduction provides an opportunity to convert atmospheric CO2 to fuels or chemicals using renewable energy. In this work, we demonstrate unexpected influence on the catalytic activity and selectivity of the electrochemical CO2 reduction reaction (CO2RR) through the functionalization of Au with thiols. 2-Phenylethanethiol modified Au electrodes (2-PET-Au) show up to a 2-fold enhancement in both Faradaic efficiency and current density for CO evolution, between -0.6 and -0.9 V vs. the reversible hydrogen electrode. Functionalization with 2-mercaptopropionic acid, which has a readily ionized carboxylate group, leads to hydrogen evolution with up to 100% Faradaic efficiency at the expense of CO evolution. Remarkably, the adsorption of certain thiols on Au does not have a negative impact on the total current density compared to blank Au. We present evidence that it is due to ligand-induced reconstruction of Au surfaces resulting in the creation of structurally and chemically modified local reaction environments. Thus a thiol species such as 2-PET, which does not contain any nitrogen-based heterocycle with a charge transfer center, can induce the formation of active sites on Au that are electrochemically active toward CO2RR within the range of electrode potential that most of the ligand concentration remains stable on Au. Our findings suggest a simple, effective, and tunable way to modify the activity and selectivity of Au electrodes.
机译：电化学还原提供了一个机会将大气中的二氧化碳转化成燃料或化学物质使用可再生能源。展示对催化意想不到的影响的电化学活性和选择性二氧化碳还原反应(CO2RR)非盟与硫醇的功能化。(2-PET-Au)出现的2倍的增强感应电流的效率和电流密度公司进化,-0.6和-0.9 V和之间可逆氢电极。有一个与2-mercaptopropionic酸容易电离羧基,导致氢进化与感应电流的100%公司进化的效率为代价。值得注意的是,某些硫醇的吸附非盟总没有负面影响电流密度比空白盟。证据表明,这是由于ligand-induced盟重建表面导致的建立结构和它的化学修饰当地的反应环境。如彼,不包含任何电荷转移氮基杂环中心,可以诱导活性中心的形成在非盟的电化学方向CO2RR电极电位的范围之内大部分的配位体浓度仍然存在稳定的非盟。有效,可调的方法修改活动非盟的电极和选择性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号