Shipeng Zhang , Xiaoshan Wang , Dewen Song , Xiang Fei , Mingwang Wang , Wenting Wu , Qingshan Zhao , Ruirui Zhu , Hui Ning , Mingbo Wu
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引用次数: 0
摘要
用电化学方法将二氧化碳还原成高价值产品是实现碳中和的一种前景广阔的策略,但却因缺乏有效的催化剂而受阻。本文通过二氧化碳激光刻蚀商用聚酰亚胺薄膜(PI),在不使用任何模板的情况下快速制备了激光诱导介孔碳(LPC),证明它是 Bi2O3 的人工支撑物。明确的多孔结构和独特的氮掺杂结构协同提高了 Bi2O3@LPC 催化 CO2 电还原成甲酸盐的活性和稳定性。制成的 Bi2O3@LPC 复合材料在 -150 mA-cm-2 的条件下,对甲酸盐的远红外效率高达 98%。DFT 计算显示,PLC 中的石墨 N 通过形成一种特殊的 N-O-Bi 结构,有助于在还原电位下稳定铋的氧化态。这项研究为设计以掺氮碳材料为载体的金属/碳复合电催化剂提供了新思路。
CO2 laser-induced porous carbon attached Bi2O3 as highly efficient catalyst for CO2 electroreduction to formate
Electrochemical reduction of carbon dioxide to high-value products is a promising strategy to achieve carbon neutrality, but is hindered by lacking of effective catalysts. Herein, a laser-induced mesoporous carbon (LPC) is quickly prepared by CO2 laser etching commercial polyimide film (PI) without any templates, which proved an artificial support for Bi2O3. The well-defined porous structure and unique nitrogen doping structure synergistically improve the activity and stability of Bi2O3@LPC in catalyzing CO2 electroreduction to formate. The as-made Bi2O3@LPC composite delivers a high faradaic efficiency of 98 % for formate at −150 mA cm−2. DFT calculations reveal the graphitic N in PLC helps stabilize the oxidized state of bismuth under reduction potentials by forming a special N–O–Bi structure. This work provides a new idea for the designing of metal/carbon composite electrocatalysts with nitrogen doped carbon materials as supports.
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.