Mechanism for Catalytic Stability Enhancement of Fe<sup>III</sup>[Co<sup>III</sup>(CN)<sub>6</sub>] by Doping Divalent Ions for Organophosphate Hydrolysis
نویسندگان
چکیده
Catalytic activity and stability of iron hexacyanocobaltate (FeIII[CoIII(CN)6], Fe–Co) for organophosphate hydrolysis are improved by doping divalent metal ions (MII = MnII, NiII, or CuII). The catalytic a series (FeIII0.8MII0.3)[CoIII(CN)6] (FeM–Co compounds) was examined in mixed solution water ethanol [9:1 (v/v)] containing disodium p-nitrophenyl phosphate (p-NPP) at 60 °C. FeM–Co compounds exhibited high conversions (≥60%, 25 h), which about four times that Fe–Co (16%). Repetitive examinations indicated the conversion second runs systems using maintained over 90% those first runs. low resulted from decomposition due to leaching FeIII ligand exchange CN p-NPP as evidenced IR XPS measurements recovered precipitates after examination. Thus, enhancement observed weaker interaction between ions, can be reduced surface acidity evaluated temperature-programmed desorption pyridine on surfaces. heats adsorption compound surfaces were around 60–80 kJ mol–1, less than half (160 mol–1). Based these results, mechanism is proposed securing Fe–NC bonds enhancing Fe–Co.
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ژورنال
عنوان ژورنال: Journal of Physical Chemistry C
سال: 2022
ISSN: ['1932-7455', '1932-7447']
DOI: https://doi.org/10.1021/acs.jpcc.2c00772