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| 1 | Quasi-continuous synthesis of cobalt single atom catalysts for transfer hydrogenation of quinoline显示文摘Improving the transfer hydrogenation of N-heteroarenes is of key importance for various industrial pro-cesses and remains a challenge so far.We reported here a microcapsule-pyrolysis strategy to quasi-continuous synthesis S,N co-doped carbon supported Co single atom catalysts(Co/SNC),which was used for transfer hydrogenation of quinoline with formic acid as the hydrogen donor.Given the unique ge-ometric and electronic properties of the Co single atoms,the excellent catalytic activity,selectivity and stability were observed.Benefiting from the quasi-continuous synthesis method,the as-obtained cata-lysts provide a reference for the large-scale preparation of single atom catalysts without amplification ef-fect.Highly catalytic performances and quasi-continuous preparation process,demonstrating a new and promising approach to rational design of atomically dispersed catalysts with maximum atomic efficiency in industrial. | Liyun Huang Hao Zhang Yujie Cheng Qingdi Sun Tao Gan Qian He Xiaohui He Hongbing Ji | 2022 | Chinese Chemical Letters2022，33，5： | 2 |
| 2 | Single Cu atom dispersed on S,N-codoped nanocarbon derived from shrimp shells for highly-efficient oxygen reduction reaction显示文摘Recently,Cu-based single-atom catalysts(SACs)have garnered increasing attention as substitutes for platinum-based catalysts in the oxygen reduction reaction(ORR).Therefore,a facile,economical,and efficient synthetic methodology for the preparation of a high-performance Cu-based SAC electrocatalyst for the ORR is extremely desired,but is also significantly challenging.In this study,we propose a ball-milling method to synthesize isolated metal SACs embedded in S,N-codoped nanocarbon(MNSDC,M=Cu,Fe,Co,Ni,Mn,Pt,and Pd).In particular,the Cu-NSDC SACs exhibit high electrochemical activity for the ORR with half-wave potential(E_(1/2))of 0.84 V(vs.reversible hydrogen electrode(RHE),20 mV higher than Pt/C)in alkaline electrolyte,excellent stability,and electrocatalytic selectivity.Density functional theory(DFT)calculations demonstrated that the desorption of OH*intermediates was the rate-determining step over Cu-NSDC.This study creates a pathway for high-performance ORR single atomic electrocatalysts for fuel cell applications and provides opportunities to convert biowaste materials into commercial opportunities. | Hao Zhang Qingdi Sun Qian He Ying Zhang Xiaohui He Tao Gan Hongbing Ji | 2022 | Nano Research2022，15，7： | 2 |
| 3 | Amino-metalloporphyrin polymers derived Fe single atom catalysts for highly efficient oxygen reduction reaction显示文摘Recently,nitrogen-doped porous carbon supported single atom catalysts(SACs)have become one of the most promising alternatives to precious metal catalysts in oxygen reduction reaction(ORR)due to their outstanding performance,especially those derived from porphyrin-based materials.However,most of them involve other metal residuals,which would cause the tedious pre-and/or post-treatment,even mislead the mechanistic investigations and active-site identification.Herein,we report a precursor-dilution strategy to synthesize Fe SACs through the Schiff-based reaction via co-polycondensation of amino-metalloporphyrin,followed by pyrolysis at high temperature.Systematic characterization results provide the compelling evidence of the dominant presence of atomically dispersed Fe-Nxspecies.Our catalyst shows superior ORR performance with positive half-wave potential(E1/2=0.85 V vs.RHE)in alkaline condition and moderate activity(E1/2=0.68 V vs.RHE)under the acidic condition,excellent methanol tolerance and good long-term stability.All the results indicate Fe SACs would be a promising candidate for replacing the precious Pt in metal-air batteries and fuel cells. | Qian He Yuying Meng Hao Zhang Ying Zhang Qingdi Sun Tao Gan Huajian Xiao Xiaohui He Hongbing Ji | 2020 | Science China Chemistry2020，63，6： | 2 |
| 4 | Synthesis of Nitrogen-doped Carbon Supported Cerium Single Atom Catalyst by Ball Milling for Selective Oxidation of Ethylbenzene显示文摘Through screening Ce precursors and pyrolysis temperatures[Ce(acac)3 as Ce precursors and pyrolysis at 900°C],zeolitic imidazolate framework-8(ZIF-8)derived nitrogen-doped carbon supported cerium single atom catalyst(Ce_(1)/NC)is successfully prepared by ball milling method.The Ce_(1)/NC catalyst exhibits exceptional catalytic performance in the selective oxidation of saturated C―H bonds in aromatic compounds,e.g.,91%conversion and 99%selelctivity can be achieved in the oxidation of ethylbenzene to acetophenone under mild reaction conditions. | ZHANG Xingcong ZHONG Yunzhu CHEN Hongyu CHENG Yujie SUN Qingdi ZHANG Hao HE Qian ZHANG Ying GUO Guanghui HE Xiaohui JI Hongbing | 2022 | Chemical Research in Chinese Universities2022，38，5： | 0 |
| 5 | Activity promotion of Rh_(1)Ca_(x)/Al_(2)O_(3) single-atom catalyst in 1-octene hydroformylation:a volcano curve exists between Ca adding ratio and catalytic activity显示文摘Single-atom catalysts(SACs)are considered the best candidates for olefin hydroformylation due to their combined advantages of homogeneous and heterogeneous catalysts.Unlike conventional organo-phosphine modification,Rh SAC is modified by introducing Ca,resulting in a significant increase in activity(maximum~5.7-fold)and stability.Furthermore,a volcano curve between Ca addition ratio and catalytic activity is found.Introducing Ca significantly increases activity by decreasing the energy barrier,but excessive Ca decreases activity due to hindering substrate adsorption and reaction. | Hao Zhang Xingcong Zhang Xilun Wang Qingdi Sun Hao Liu Hongbing Ji Xiaohui He | 2024 | Science China Chemistry2024，67，4： | 0 |
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