Passaponti Maurizio, Savastano Matteo, Clares M Paz, Inclán Mario, Lavacchi Alessandro, Bianchi Antonio, García-España Enrique, Innocenti Massimo
Department of Chemistry "Ugo Schiff" , University of Florence , via della Lastruccia 3 , 50019 Sesto Fiorentino , Italy.
CSGI , University of Florence , via della Lastruccia 3 , 50019 Sesto Fiorentino , Italy.
Inorg Chem. 2018 Dec 3;57(23):14484-14488. doi: 10.1021/acs.inorgchem.8b02695. Epub 2018 Oct 24.
We report here the remarkable catalytic efficiency observed for two Pd(II) azamacrocyclic complexes supported on multiwalled carbon nanotubes (MWCNTs) toward oxygen reduction reactions. Beyond a main (>90%) 4e process and an onset potential close to or better than those of commercial Pt electrodes, the MWCNTs functionalization strategy, aimed at chemically defined Pd(II)-based catalytic centers, allowed the half-cell to exceed the proton-exchange-membrane fuel-cell reference/target mass activity efficiency set by the U.S. Department of Energy for 2020 (440 mA/mg at 0.9 V vs reversible hydrogen electrode).
我们在此报告了负载在多壁碳纳米管（MWCNT）上的两种钯（II）氮杂大环配合物对氧还原反应具有显著的催化效率。除了主要的（>90%）4电子过程以及起始电位接近或优于商业铂电极外，旨在形成化学定义明确的钯（II）基催化中心的MWCNT功能化策略，使该半电池超过了美国能源部设定的2020年质子交换膜燃料电池参考/目标质量活性效率（相对于可逆氢电极在0.9 V时为440 mA/mg）。
