催化作用
兴奋剂
材料科学
铋
格式化
拉伤
拉伸应变
化学工程
极限抗拉强度
纳米技术
无机化学
化学
复合材料
光电子学
冶金
有机化学
医学
内科学
工程类
作者
Wei Yang,Xuezhe Xu,Danrong Shi,Yaming Jiang,Zheng Chen,Li Tan,Zheyuan Liu,Shenghong Zhong,Yan Yu
出处
期刊:Small
[Wiley]
日期:2024-04-09
标识
DOI:10.1002/smll.202401017
摘要
Abstract Doping is a recognized method for enhancing catalytic performance. The introduction of strains is a common consequence of doping, although it is often overlooked. Differentiating the impact of doping and strain on catalytic performance poses a significant challenge. In this study, Cu‐doped Bi catalysts with substantial tensile strain are synthesized. The synergistic effects of doping and strain in bismuth result in a remarkable CO 2 RR performance. Under optimized conditions, Cu 1/6 ‐Bi demonstrates exceptional formate Faradaic efficiency (>95%) and maintains over 90% across a wide potential window of 900 mV. Furthermore, it delivers an industrial‐relevant partial current density of −317 mA cm −2 at −1.2 V RHE in a flow cell, while maintaining its selectivity. Additionally, it exhibits exceptional long‐term stability, surpassing 120 h at −200 mA cm −2 . Through experimental and theoretical mechanistic investigations, it has been determined that the introduction of tensile strain facilitates the adsorption of *CO 2 , thereby enhancing the reaction kinetics. Moreover, the presence of Cu dopants and tensile strain further diminishes the energy barrier for the formation of *OCHO intermediate. This study not only offers valuable insights for the development of effective catalysts for CO 2 RR through doping, but also establishes correlations between doping, lattice strains, and catalytic properties of bismuth catalysts.
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