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Mechanistic insight on porphyrin based porous titanium coordination polymer as efficient bifunctional electrocatalyst for hydrogen and oxygen evolution reactions

机译:基于卟啉的多孔钛配位聚合物作为高效双官能电催化剂的机械洞察力氢气进化反应

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摘要

Herein, a novel porous titanium coordination polymer (TiCP-PCP) with push-pull motif is prepared through the transesterification reaction of catechol porphyrin with titanium tetraisopmpoxide. TiCP-PCP demonstrates efficient electrocatalytic activity toward HER/OER with prominent electrochemical durability in acid/basic medium. Surprisingly, TiCP-PCP requires relatively low overpotentials of 339 and 310 mV to reach a catalytic current density of 10 mA cm(-2) for HER and OER, respectively. Based on experimental and theoretical results, the improved electrocatalytic performances for TiCP-PCP in comparison with those of TPP and TiO2 are ascribed to efficient charge transfer and positive synergistic effect, stemming from the interactions between porphyrin units and Ti entities. This work can be readily extended to a wide range of porous coordination polymer-based electrochemical devices and catalysts design.
机译:在此,通过具有推挽式基序的新型多孔钛配位聚合物(TICP-PCP)通过CateChol卟啉与四氧化钛氧化钛的酯交换反应制备。 TICP-PCP在酸/基础培养基中展示了对她/伊尔的高效电化学活性,具有突出的电化学耐久性。 令人惊讶的是,TICP-PCP需要相对较低的339和310mV的过电位,分别为她和Oer达到10 mA cm(-2)的催化电流密度。 基于实验和理论结果,与TPP和TiO2相比,TICP-PCP的改善的电催化性能归因于有效的电荷转移和阳性协同作用,从卟啉单位和Ti实体之间的相互作用中源性源。 该工作可以容易地扩展到各种多孔配位聚合物基电化学装置和催化剂设计。

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