Enhanced CO2 electroreduction via interaction of dangling S bonds and Co sites in cobalt phthalocyanine/ZnIn2S4 hybrids†,Chemical Science

当前位置： X-MOL 学术 › Chem. Sci. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Enhanced CO2 electroreduction via interaction of dangling S bonds and Co sites in cobalt phthalocyanine/ZnIn2S4 hybrids†
Chemical Science ( IF 7.6 ) Pub Date : 2018-11-26 00:00:00 , DOI: 10.1039/c8sc03986k
Chunjun Chen _{1,

2} , Xiaofu Sun _{1,

2} , Dexin Yang _{1,

2} , Lu Lu _{1,

2} , Haihong Wu ₃ , Lirong Zheng ₄ , Pengfei An ₄ , Jing Zhang ₄ , Buxing Han _{1,

2}

Affiliation

The efficient electrochemical reduction of CO₂ to CO in aqueous electrolyte is very interesting. Due to the critical electron-transfer step during the activation of CO₂, it is important to design efficient strategies to engineer the electronic properties of catalysts to improve the electrochemical performance. Herein cobalt phthalocyanine (CoPc) supported on ZnIn₂S₄ (ZIS) nanosheets was synthesized. It was found that the hybrids showed excellent performance for CO₂ electroreduction to CO in aqueous solution. The faradaic efficiency, current density and mass activity could reach 93%, 8 mA cm⁻² and 266 mA mg_(CoPc)⁻¹, respectively. Introduction of Zn-defects resulted in dangling S bonds in the ZIS support, which interacted with Co active sites of CoPc via strong Co–S interaction. Mechanistic studies revealed that the enhancement of CO production over CoPc by Co–S interaction originated from the eased CO₂ activation.

中文翻译：

通过钴酞菁/ZnIn2S4 杂化物中悬挂 S 键和 Co 位点的相互作用增强 CO2 电还原†

在水性电解质中将CO ₂有效电化学还原为CO是非常有趣的。由于CO ₂活化过程中的关键电子转移步骤，设计有效的策略来设计催化剂的电子特性以提高电化学性能非常重要。本文合成了负载在ZnIn ₂ S ₄ (ZIS) 纳米片上的钴酞菁(CoPc)。结果发现，该杂化物在水溶液中将CO ₂电还原为CO表现出优异的性能。法拉第效率、电流密度和质量活性分别达到93%、8 mA cm ^-2和266 mA mg _(CoPc) ^-1 。锌缺陷的引入导致 ZIS 载体中出现悬挂的 S 键，该键通过强 Co-S 相互作用与 CoPc 的 Co 活性位点相互作用。机理研究表明，Co-S 相互作用相对于 CoPc 的 CO 产量增强源于 CO ₂活化的缓解。

更新日期：2018-11-26

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11