An enhanced electrochemical CO2 reduction reaction on the SnOx–PdO surface of SnPd nanoparticles decorated on N-doped carbon fibers. Issue 1 (13th November 2020)

• Record Type: Journal Article
• Authors: Narayanaru, Sreekanth; Anilkumar, Gopinathan M.; Ito, Masaki; Tamaki, Takanori; Yamaguchi, Takeo
• Is Part Of: Catalysis science & technology. Volume 11:Issue 1(2021)
• Page Start: 143
• Page End: 151
• Publication Date: 2020-11-13
• Subjects: Catalysis -- Periodicals; 541.395
• DOI: 10.1039/d0cy01437k
• Languages: English
• ISSNs: 2044-4753

Abstract

Abstract : Electrochemical reduction of CO2 to formate on SnPd–NCF. The adsorbed bicarbonate ion promotes the protonation of CO2 ˙ − to HCO2 − . Abstract : In the electrocatalytic CO2 reduction reaction (CO2 RR), tin-based catalysts are known for their high formate faradaic yield. However higher overpotentials are required to attain a high faradaic yield with high partial current density for formate. Here, we describe the increase in the electrocatalytic CO2 RR activity of Sn nanoparticles decorated on nitrogen-doped carbon fibers (NCFs) by adding a small amount of Pd. Nitrogen-doped carbon fibers decorated with SnPd nanoparticles (Sn100− y Pd y –NCF) of different Sn : Pd ratios were synthesized using the electrospinning method and their electrocatalytic CO2 RR activity was studied. The Sn100− y Pd y –NCF catalyst with 3 wt% ( y = 3) Pd displayed superior activity for the CO2 RR and attained a faradaic efficiency of 85%, whereas the NCF with Sn nanoparticles (Sn100 –NCF) attained only 57% efficiency at the same potential. The surface electronic configuration, Tafel slope (79 mV dec −1 ) and bicarbonate reduction activity of the catalyst reveal that the combination of SnO x –PdO on the catalyst surface is responsible for the superior CO2 RR activity.