2025-04-08 東北大学,北海道大学, AZUL Energy 株式会社
＜関連情報＞
- https://www.tohoku.ac.jp/japanese/newimg/pressimg/tohokuuniv-press20250408_03_co2.pdf
- https://advanced.onlinelibrary.wiley.com/doi/10.1002/advs.202501459
表面電荷移動を利用したコバルトフタロシアニン結晶による1000 mA cm-2を超える大電流密度での効率的なCO2-CO電解還元反応 Surface Charge Transfer Enhanced Cobalt-Phthalocyanine Crystals for Efficient CO2-to-CO Electroreduction with Large Current Density Exceeding 1000 mA cm−2
Tengyi Liu, Di Zhang, Yutaro Hirai, Koju Ito, Kosuke Ishibashi, Naoto Todoroki, Yasutaka Matsuo, Junya Yoshida, Shimpei Ono, Hao Li, Hiroshi Yabu
Advanced Science Published: 04 April 2025
DOI:https://doi.org/10.1002/advs.202501459
Abstract
Phthalocyanines (Pcs) have garnered significant attention as promising catalysts for electrochemical CO2 reduction (ECR); however, traditional methods for preparing carbon-supported Pcs are often complex and time-consuming, limiting their industrial applicability. Herein, a rapid spray-growth method is introduced that directly deposits CoPc crystals onto carbon paper (CP) in just 15 min. The resulting CoPc/CP electrode maintains > 90% CO selectivity across a broad ECR window (−0.57 to −1.32 V vs RHE), achieves a record-breaking CO current density of −1034 mA cm−2, an ultrahigh mass activity of 5180 A g−1, and demonstrates excellent long-term stability (145 h @ −150 mA cm−2), surpassing all reported Pc-based catalysts. Comprehensive characterization attributes this high performance to its carbon-supported-crystalline structure and surface charge transfer (SCT). Density functional theory (DFT) calculations further reveal that even minimal SCT effectively optimizes the adsorption energies of key intermediates (*CO and *COOH), thereby significantly enhancing intrinsic activity. Moreover, this spray-grown electrode offers unique structural advantages, such as strong substrate adhesion and internal layers that replenish active sites—features absent in traditional carbon-supported electrodes. It is believed that this facile spray-growth method holds broad potential and enables the application of additional Pc-based materials for industrial-scale ECR.
