2-Chloropyridine grafted on nitrogen-doped carbon nanotubes for efficient electroreduction of CO2 to CO under high overpotentials

IF 11.6 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon Pub Date : 2025-06-25 DOI:10.1016/j.carbon.2025.120562

Bingze Liu , Jin An Wang , Dongfang Niu

引用次数: 0

Abstract

Nitrogen-doped carbon nanotubes (NCNT) for CO₂ electroreduction (CO₂ER) to CO usually perform a low reaction activity due to weak adsorption and high activation energy of CO₂. Herein, 2-chloropyridine molecules (2-PyCl) as co-catalysts were grafted onto NCNT to prepare a composite electrocatalyst (PyCl-NCNT). The structural characterization and electrochemical tests confirmed that chlorine atoms in 2-PyCl synergized with pyridine molecules, substantially enhancing the CO₂ adsorption capacity, thereby accelerating the CO₂ER rate. PyCl-NCNT achieved a CO faradaic efficiency (FE_CO) of 91.3 % and a CO partial current density (j_CO) of −26.8 mA cm⁻² at −1.2 V vs. RHE, maintaining a FE_CO above 90 % in a wide electrochemical potential window (−0.7 ∼ −1.2 V).

Abstract Image

查看原文本刊更多论文

氮掺杂碳纳米管接枝2-氯吡啶在高过电位下高效电还原CO2为CO

氮掺杂碳纳米管（NCNT）用于CO2电还原（CO2ER）制CO，由于CO2的吸附能力弱，活化能高，通常具有较低的反应活性。本文将2-氯吡啶分子（2-PyCl）作为共催化剂接枝到NCNT上，制备了复合电催化剂（PyCl-NCNT）。结构表征和电化学测试证实，2-PyCl中的氯原子与吡啶分子协同作用，大大增强了CO2的吸附能力，从而加快了CO2ER速率。与RHE相比，PyCl-NCNT在−1.2 V下的CO法拉第效率（FECO）为91.3%，CO偏电流密度（jCO）为−26.8 mA cm−2，在宽电化学电位窗口（−0.7 ~−1.2 V）内保持了90%以上的FECO。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Carbon 工程技术-材料科学：综合

CiteScore

20.80

自引率

7.30%

发文量

审稿时长

23 days

期刊介绍： The journal Carbon is an international multidisciplinary forum for communicating scientific advances in the field of carbon materials. It reports new findings related to the formation, structure, properties, behaviors, and technological applications of carbons. Carbons are a broad class of ordered or disordered solid phases composed primarily of elemental carbon, including but not limited to carbon black, carbon fibers and filaments, carbon nanotubes, diamond and diamond-like carbon, fullerenes, glassy carbon, graphite, graphene, graphene-oxide, porous carbons, pyrolytic carbon, and other sp2 and non-sp2 hybridized carbon systems. Carbon is the companion title to the open access journal Carbon Trends. Relevant application areas for carbon materials include biology and medicine, catalysis, electronic, optoelectronic, spintronic, high-frequency, and photonic devices, energy storage and conversion systems, environmental applications and water treatment, smart materials and systems, and structural and thermal applications.