Enhancement of CO2RR product formation on Cu-ZnO-based electrodes by varying ink formulation and post-treatment methods

被引：17

作者：

Jaster, Theresa ^{[1
,2
]}

Albers, Simon ^{[1
]}

Leonhard, Armin ^{[1
]}

Kraeenbring, Mena-Alexander ^{[3
]}

Lohmann, Heiko ^{[1
]}

Zeidler-Fandrich, Barbara ^{[1
]}

Ozcan, Fatih ^{[3
]}

Segets, Doris ^{[3
,4
]}

Apfel, Ulf-Peter ^{[1
,2
]}

机构：

[1] Fraunhofer Inst Environm Safety & Energy Technol, Dept Energy, Osterfelder Str 3, D-46047 Oberhausen, Germany

[2] Ruhr Univ Bochum, Inorgan Chem 1, Univ Str 150, D-44801 Bochum, Germany

[3] Univ Duisburg Essen UDE, Inst Energy & Mat Proc Particle Sci & Technol EMP, Carl Benz Str 199, D-47057 Duisburg, Germany

[4] Univ Duisburg Essen UDE, Ctr Nanointegrat Duisburg Essen CENIDE, Carl Benz Str 199, D-47057 Duisburg, Germany

来源：

JOURNAL OF PHYSICS-ENERGY | 2023年 / 5卷 / 02期

关键词：

electrochemical CO2 reduction; gas diffusion electrodes; ink composition; CuZn catalysis; GAS-DIFFUSION ELECTRODES; REDUCTION; ELECTROREDUCTION; CO;

D O I：

10.1088/2515-7655/acb8db

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Numerous catalysts have been reported with enhanced performance, e.g. longer lifetime and improved selectivity, for the electrochemical CO2 reduction reaction (CO2RR). Respectively little is, however, known about the influence of the electrode structuring and pre-treatment on this reaction for catalytic layers. Thus, we herein report on the modification of the catalyst environment of a Cu-ZnO-carbon black catalyst by variation of the ink composition and subsequent electrode treatment before performing CO2RR. We furthermore provide insight into the impact of different solvents, ionomer, and additives like pore forming agents used for the ink preparation as well as post-treatment steps in terms of pressing and sintering of the generated electrodes on the CO2RR performance. Although using the same catalyst for all electrodes, remarkable differences in hydrophobicity, surface morphology, and electrochemical performance with respect to stability and product distribution were observed. Our study reveals the critical role of the catalytic layer assembly aside from using proper catalysts. We furthermore show that the parasitic hydrogen formation and flooding behavior can be lowered and C2+ product formation can be enhanced when operating in optimized gas diffusion electrodes.

引用

页数：15