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Preparation of Zn/Co-ZIF derived porous carbon supported Pd as catalyst and its application to formic acid dehydrogenation
Received date: 2023-10-30
Online published: 2024-06-20
Highly active Ag1Pd7@HPNC catalyst were obtained through anchoring Ag and Pd on Zn/Co-ZIF derived nitrogen-doped porous carbon（HPNC），which was obtained by HNO3 immersion and（NH4）2HPO4 phosphating.Zn/Co-ZIF，porous 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 supports and different mAg∶mPd on the catalyst catalysts，it was demonstrated that the Ag1Pd7@HPNC catalysts had excellent formic 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 Ag x Pd y @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.
Key words： formic acid; hydrogen production; ZIF; Pd catalyst; porous carbon
LIU Qingcui , LI Yunqing , PANG Ruiqi , TIAN Yaping , CHEN Yiying , LI Fang , LI Qiming . Preparation of Zn/Co-ZIF derived porous carbon supported Pd as catalyst and its application to formic acid dehydrogenation[J]. Inorganic Chemicals Industry, 2024 , 56(6) : 147 -152 . DOI: 10.19964/j.issn.1006-4990.2023-0517
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