Efficient electrocatalytic CO2 reduction to C2+ chemicals on internal porous copper

IF 9 2区 材料科学 Q1 CHEMISTRY, PHYSICAL
Sha Wang, Jianling Zhang, Lei Yao, Yisen Yang, Lirong Zheng, Bo Guan, Yingzhe Zhao, Yanyue Wang, Buxing Han, Xueqing Xing
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Abstract

To improve the electrocatalytic conversion of carbon dioxide (CO2) into C2+ products (such as ethylene (C2H4) and ethanol (CH3CH2OH), etc.) is of great importance, but remains challenging. Herein, we proposed a strategy that directs the C-C coupling pathway through enriching and confining the carbon monoxide (CO) intermediate to internal pores of Cu nanocubes, for electrocatalytic reduction of CO2 into C2+ chemicals. In H-type cell, the Faraday efficiency (FE) for ethylene and ethanol reaches 70.3% at −1.28 V versus the reversible hydrogen electrode (vs. RHE), with a current density of 47.9 mA·cm−2. In flow cell, the total current density is up to 340.3 mA·cm−2 at −2.38 V (vs. RHE) and the FE for C2+ products is 67.4%. Experimental and theoretical studies reveal that both the CO intermediate adsorption and C-C coupling reaction on such an internal porous catalyst are facilitated, thus improving CO2-to-C2+ conversion efficiency.

在多孔铜上高效电催化CO2还原为C2+化学物
提高二氧化碳(CO2)电催化转化为C2+产物(如乙烯(C2H4)和乙醇(CH3CH2OH)等)的效率是非常重要的,但仍然具有挑战性。在此,我们提出了一种策略,通过富集和限制一氧化碳(CO)中间体到Cu纳米立方的内部孔来指导C-C偶联途径,以电催化将CO2还原为C2+化学物质。在h型电池中,相对于可逆氢电极(vs. RHE),在−1.28 V下,乙烯和乙醇的法拉第效率(FE)达到70.3%,电流密度为47.9 mA·cm−2。在- 2.38 V (vs. RHE)下,总电流密度高达340.3 mA·cm−2,C2+产物的FE为67.4%。实验和理论研究表明,这种内孔催化剂有利于CO中间体吸附和C-C偶联反应,从而提高了co2到c2 +的转化效率。
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来源期刊
Nano Research
Nano Research 化学-材料科学:综合
CiteScore
14.30
自引率
11.10%
发文量
2574
审稿时长
1.7 months
期刊介绍: Nano Research is a peer-reviewed, international and interdisciplinary research journal that focuses on all aspects of nanoscience and nanotechnology. It solicits submissions in various topical areas, from basic aspects of nanoscale materials to practical applications. The journal publishes articles on synthesis, characterization, and manipulation of nanomaterials; nanoscale physics, electrical transport, and quantum physics; scanning probe microscopy and spectroscopy; nanofluidics; nanosensors; nanoelectronics and molecular electronics; nano-optics, nano-optoelectronics, and nano-photonics; nanomagnetics; nanobiotechnology and nanomedicine; and nanoscale modeling and simulations. Nano Research offers readers a combination of authoritative and comprehensive Reviews, original cutting-edge research in Communication and Full Paper formats. The journal also prioritizes rapid review to ensure prompt publication.
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