Monodispersed Cu-TCPP/Cu₂O hybrid microspheres: a superior cascade electrocatalyst towards CO₂ reduction to C₂ products

Authors

Zi-xuan Wan, New Energy Research Institute, School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou 510006, Guangdong, China
Aidar Kuchkaev, Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, Arbuzov Street 8, Kazan, 420088, Russian Federation
Dmitry Yakhvarov, Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, Arbuzov Street 8, Kazan, 420088, Russian Federation; Alexander Butlerov Institute of Chemistry, Kazan Federal University, Kremlyovskaya Street 18, Kazan, 420008, Russian Federation
Xiong-wu Kang, New Energy Research Institute, School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou 510006, Guangdong, China

Document Type

Communication

Corresponding Author(s)

Xiong-wu Kang(esxkang@scut.edu.cn);
Dmitry Yakhvarov(yakhvar@iopc.ru)

Abstract

The electrochemical conversion of carbon dioxide into valuable chemicals is a feasible way to mitigate the negative impacts of overmuch carbon dioxide emissions. Porphyrin-based metal organic frameworks (MOFs) are expected to be used for selective and efficient electrochemical carbon dioxide reduction (ECR) with porous structure and ordered active sites. Herein, we report the synthesis of a monodispersed and spherical organic/inorganic hybrid Cu-TCPP@Cu₂O electrocatalyst composed of Cu-TCPP (TCPP=tetrakis (4-carboxyphenyl) porphyrin) and Cu₂O, where TCPP play significant roles in regulating the morphology. In-situly formed Cu during ECR process in combination with Cu-TCPP (Cu-TCPP@Cu) can suppress hydrogen evolution, enrich CO intermediate and promote C-C coupling towards C₂ products. Cu-TCPP@Cu supported on porous carbon (PC) show ultrafine Cu nanoclusters on PC and displays high ECR activity and selectivity towards C₂ products, with a C₂ faradaic efficiency of 62.3% at –1.0 V versus the reversible hydrogen electrode (RHE) and a C₂ partial current density of 83.4 mA cm^–2, which is 7.6 times and 13.1 times that of pure Cu₂O and TCPP. In this paper, the morphology and hybrid structure of the catalyst were studied to improve the selectivity of ECR to produce C₂ products, which provided a new idea for the design of high-performance ECR catalyst.

Graphical Abstract

Keywords

organic/inorganic hybrid electrocatalysts, TCPP, cuprous oxide, cascade electrocatalysts

DOI

10.13208/j.electrochem.2303271

Online Date

6-14-2023

Recommended Citation

Zi-xuan Wan, Aidar Kuchkaev, Dmitry Yakhvarov, Xiong-wu Kang.

Monodispersed Cu-TCPP/Cu₂O hybrid microspheres: a superior cascade electrocatalyst towards CO₂ reduction to C₂ products