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Study on the Oxidation Enhancement of Formic Acid and Formate Blended Fuel Solution on Pt Catalyst
Author(s) -
Guo J.,
Gao Y.Y.,
Tan C.H.,
Li Y.P.,
Zhao S.L.,
Bai L.Z.,
Zhang S.Y.
Publication year - 2013
Publication title -
fuel cells
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.485
H-Index - 69
eISSN - 1615-6854
pISSN - 1615-6846
DOI - 10.1002/fuce.201200148
Subject(s) - chemistry , tafel equation , formate , formic acid , chronoamperometry , cyclic voltammetry , inorganic chemistry , catalysis , electrolyte , ionic strength , aqueous solution , electrochemistry , electrode , organic chemistry
The effect of [HCOOH]/[HCOONa] ratio on the oxidation activity of HOOH and HCOONa blended fuel solution on Pt nanocatalyst is studied using cyclic voltammetry, chronoamperometry, and Tafel analysis. Five electrolyte solutions with the same total concentrations of HCOOH and HCOONa but different [HCOOH]/[HCOONa] ratios are tested. Blended solutions containing both higher HCOOH and HCOONa concentrations are found to be more active than single HCOOH or HCOONa solution, with the solution containing 0.8 mol dm –3 HCOONa and 0.2 mol dm –3 HCOOH exhibiting the best activity. The reasons behind the better performance of the HCOOH and HCOONa blended solutions – such as electric conductivity, pH, concentrations of HCOOH, and HCOONa, ionic strength of the solution, and oxidation mechanism of HCOOH – are investigated. Enhanced oxidation activity of the HCOOH and HCOONa blended solution is observed to be the mutual effect of various reasons, with pH and [HCOO – ] assuming the key roles.