Low full-cell voltage driven high-current-density selective paired formate electrosynthesis. Issue 3 (21st December 2021)

• Record Type: Journal Article
• Authors: Xiao, Chuqian; Cheng, Ling; Wang, Yating; Liu, Jinze; Chen, Rongzhen; Jiang, Hao; Li, Yuhang; Li, Chunzhong
• Is Part Of: Journal of materials chemistry. Volume 10:Issue 3(2022)
• Page Start: 1329
• Page End: 1335
• Publication Date: 2021-12-21
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d1ta08303a
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : A low cell voltage of 2.48 V drives paired formate electrosynthesis at 300 mA cm −2 with double 100% FEs in the cathode and anode. Abstract : Anodic selective electro-oxidation of methanol paired with cathodic carbon dioxide (CO2 ) reduction is regarded as a promising strategy to generate value-added formate products. We first design a 3D-assembled NiCo layered double hydroxide electrocatalyst containing sulfur with a low coordination number (S–NiCo-LDH) for methanol oxidation to formate. We decrease the anodic methanol-to-formate working potential to 1.39 V ( vs. RHE) at 100 mA cm −2, and maintain ∼100% formate faradaic efficiency at a high current density up to 300 mA cm −2 with >60 mV, lower than the previous best potentials in the literature. From the remaining S 2p1/2 peak after electrocatalysis, we demonstrate that the low-coordinated sulfur on the catalyst surface serves as the promoter for the reaction. In the end, when combining the CO2 reduction in the cathode, we achieve a record low full-cell voltage of 2.48 V to drive selective paired formate electrosynthesis at a high current density of 300 mA cm −2 .