论文部分内容阅读
The electrosynthesis of H2O2 as an environmentally friendly green process has attracted great attention due to the importance of H2O2 in industry and human lives.In this work,a new strategy was proposed to improve the electrical conductivity and H2O2 selectivity of transition metal oxides catalysts.F-C(F doped carbon)was coupled with Ta2O5 by calcining polyvinylidene fluoride(PVDF)as the carbon source using one step method.The Ta2O5/F-C composite catalysts show an excellent H2O2 selectivity of more than 80％as well as high reactivity at 2.52 mA/cm2,which is greatly enhanced compared to the counterparts of F-C(selectivity of 59％)and Ta2O5-800(current density of 0.85 mA/cm2)in 0.1 M KOH solution.The onset potential for H2O2 production on Ta2O5/F-C composites is 0.78 V in 0.1 M KOH,which indicates a negligible overpotential.In addition,H2O2 selectivity of the catalyst can be stabilized at more than 80％after 10 hours of electrolysis in alkaline electrolyte.The high performance due to the introduction of F-C increases the conductivity of Ta2O5 and the synergistic effect between F-C and Ta2O5.This work proposed an efficient synergistic effect among F-doped C and Ta2O5 for H2O2 production.