Viologen-Radical-Driven Hydrogen Evolution from Water Catalyzed by Co-NHC Catalysts: Radical Scavenging by Nitrate and Volmer-Heyrovsky-like CPET Pathway - Kosei Yamauchi; Ken Kawano; Koichi Yatsuzuka; Kaori Kawamura; Masanori Kan; Ken Sakai (Journal of the American Chemical Society, 2025)