Highly active Ag1Pd7@HPNC catalyst were obtained through anchoring Ag and Pd on Zn/Co-ZIF derived nitro-gen-doped porous carbon(HPNC),which was obtained by HNO3immersion and(NH4)2HPO4 phosphating.Zn/Co-ZIF,po-rous carbon supports and prepared catalysts were characterized and systematically analyzed by a series of characterization methods such as XRD,TEM,SEM and EDS,etc.The results showed that Zn and most of Co species in porous carbon could be effectively removed by high-temperature sintering and acidification treatment,and small-size Pd and Ag nanoparticles could be efficiently loaded on the surface of HPNC porous carbon carriers.By exploring the effects of different catalyst sup-ports and different mAg∶mpd on the catalyst catalysts,it was demonstrated that the Ag1Pd7@HPNC catalysts had excellent for-mic acid catalytic activity.The formic acid dehydrogenation experiment showed that the catalytic activity of Pd@HPNC treated by(NH4)2HPO4 was superior to that of untreated Pd@HNC catalyst,and the catalytic activity of AgxPd,@HPNC(x＞0)prepared by doping Ag species had been further improved.When the mass ratio of mAg∶mPd=1∶7,the catalytic activity of Ag1Pd7@HPNC for formic acid decomposition was optimal with a turnover frequency(TOF)of 1 025 h-1 for formic acid at 318 K,and the catalyst was recycled for five times with the TOF value of 920 h-1,indicating its good recycling stability.Ag1Pd7@HPNC showed a good application prospect to formic acid dehydrogenation.
维普
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