碳化铁/氮掺杂碳复合材料电催化性能研究  

Study on electrocatalytic property of Fe3C/N-doped carbon composite

作　　者：郑宝成 陈东[1] 丘德立 马丽[1] Zheng Baocheng;Chen Dong;Qiu Deli;Ma Li(School of Chemistry and Chemical Engineering,Hefei University of Technology,Hefei 230000)

机构地区：[1]合肥工业大学化学与工学院,合肥230000

出　　处：《化工新型材料》2020年第10期121-124,128,共5页New Chemical Materials

基　　金：国家青年科学基金项目“高活性铬氮配合物的设计合成及其与有机底物的反应活性研究”(21801058)。

摘　　要：合成高效、经济的析氢电催化剂对于解决能源危机和化石燃料短缺问题具有重要意义。报道了以2,2-联吡啶-6,6-二羧酸(H2bpdc)为前驱体的八配位铁配合物为载体,制备碳化铁嵌入式碳复合材料的方法。通过控制热解条件,制备的材料在0.5mol/L H2SO4溶液中表现出较高的HER活性,具有较低的起始过电位(1mA/cm2电流密度时为53mV)和较低的过电位(10mA/cm2电流密度时为149mV),这种高性能归功于碳化铁表面的最佳电子密度的氮掺杂碳。实验揭示了碳复合材料电催化剂与其金属络合物前驱体之间的关系,为设计高效、低成本的电催化剂提供了一条可行的途径。Synthesis of efficient and cost-effective electrocatalysts for the hydrogen evolution reaction(HER)is of great significance for solving energy crisis and fossil fuel shortage.The effective and simple preparation of iron carbide(Fe3C)-embedded and N-doped carbon composites was carried using an eight-coordinated iron complex bearing2,2′-bipyridine-6,6′-dicarboxylic acid(H2 bpdc)ligand as the precursor.By controlled pyrolysis,the as-prepared material shown high HER activity with a low onset overpotential(53 mV for reaching a current density of 1 mA·cm-2)and a low overpotential(149 mV for reaching a current density of 10 mA·cm-2)in 0.5 mol/L H2SO4 solution.Such high performance was ascribed to the Fe3C surface with an optimized electron density by N-doped carbon.The relationship between the carbon composite electrocatalysts and their metal complex precursors was revealed.It also implied a feasible way toward the design of efficient and low-cost electrocatalysts in energy conversion.

关 键 词：电催化析氢 金属配合物 复合材料 制备 

分 类 号：O69[理学—化学]