A co-coordination strategy to realize janus-type bimetallic phosphide as highly efficient and durable bifunctional catalyst for water splitting
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2021年第15期
论文作者：Bin Wang Yuanfu Chen Qi Wu Yingjiong Lu Xiaojuan Zhang Xinqiang Wang Bo Yu Dong Xu Yang Wanli Zhang
摘 要：In this work,a Janus-type dual-ligand metal-organic frameworks derived bimetallic （Fe,Co）P nanoparticles embedded carbon nanotube （CNT） skeleton （DLD-Fe Co P@CNT） is presented and synthesized via a facile"co-coordination synthesis"strategy.The DLD-Fe Co P@CNT hybrid shows much better performances for OER and HER with much lower Tafel slope of 39.6 （57.1） m V dec-1,an overpotential of 286（166） m V@10 m A cm-2and better stability for OER （HER） in 1 M KOH.Being both cathode and anode for water splitting,it requires only a low voltage of 1.67 V to obtain 10 m A cm-2with nearly 100%faradaic efficiency,which is close to Pt/C//Ru O2cell.Density functional theory calculations based on the bimetallic phosphide (Fe0.3Co0.7P) model reveal that,compared with the monometallic Fe P or Co P,the enhanced catalytic activities of Fe0.3Co0.7P is mainly manifested in its free energy of H adsorption (GH*) closer to zero,larger binding strength for H2O and higher electrical conductivity.
Bin Wang1，Yuanfu Chen1,2，Qi Wu2，Yingjiong Lu1，Xiaojuan Zhang1，Xinqiang Wang1，Bo Yu1，Dong Xu Yang1，Wanli Zhang1
1. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China2. School of Science, and Institute of Oxygen Supply, Tibet University
摘 要：In this work,a Janus-type dual-ligand metal-organic frameworks derived bimetallic （Fe,Co）P nanoparticles embedded carbon nanotube （CNT） skeleton （DLD-Fe Co P@CNT） is presented and synthesized via a facile"co-coordination synthesis"strategy.The DLD-Fe Co P@CNT hybrid shows much better performances for OER and HER with much lower Tafel slope of 39.6 （57.1） m V dec-1,an overpotential of 286（166） m V@10 m A cm-2and better stability for OER （HER） in 1 M KOH.Being both cathode and anode for water splitting,it requires only a low voltage of 1.67 V to obtain 10 m A cm-2with nearly 100%faradaic efficiency,which is close to Pt/C//Ru O2cell.Density functional theory calculations based on the bimetallic phosphide (Fe0.3Co0.7P) model reveal that,compared with the monometallic Fe P or Co P,the enhanced catalytic activities of Fe0.3Co0.7P is mainly manifested in its free energy of H adsorption (GH*) closer to zero,larger binding strength for H2O and higher electrical conductivity.
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