非贵金属多孔Mo_(2)N纳米带催化剂的制备与电解析氢性能研究  

Preparation Non-Noble Electrocatalyst Porous Mo_(2)N Nanobelt Arrays and In⁃vestigation on Hydrogen Evolution Performance

作　　者：张雪茹 彭昊 董森宇 汤利梅 张勇 吴玉程[2,3] ZHANG Xueru;PENG Hao;DONG Senyu;TANG Limei;ZHANG Yong;WU Yucheng(Instrumental Analysis Center,Hefei University of Technology,Hefei 230009,China;Key Laboratory of Advanced Functional Materials and Devices of Anhui Province,Hefei 230009,China;School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学分析测试中心,合肥230009 [2]先进功能材料与器件安徽省重点实验室,合肥230009 [3]合肥工业大学材料科学与工程学院,合肥230009

出　　处：《真空科学与技术学报》2022年第3期185-192,共8页Chinese Journal of Vacuum Science and Technology

基　　金：国家自然科学基金面上项目(52072106);中央高校基本科研专项资金项目(JZ2019HGBZ0134;PA2019GDZC0096)。

摘　　要：采用水热法和氮化法相结合的手段,在优化的实验条件下,获得了生长在导电碳纸上的多孔氮化钼(Mo_(2)N)纳米带阵列。首先采用水热法在碳纸上原位合成了高密度的MoO3纳米带阵列。随后的氮化反应遵循固态拓扑反应机理,形成了具有密排介孔的Mo_(2)N纳米带阵列。Mo_(2)N/C不需要粘合剂可以直接作为电极使用。在不负载贵金属的情况下,Mo_(2)N/C表现出较优异的电催化析氢性能。在10 mA•cm^(-2)电流密度时,其过电位约为-180 mV;Tafel斜率约为81 mV/dec。与MoO_(3)/C相比,Mo_(2)N/C的η10值低约-60 mV,Tafel斜率低约94 mV/dec。氮化后催化析氢性能有很大的提升,多孔Mo_(2)N纳米带/C有望应用于非贵金属自支撑型析氢催化剂。Porous molybdenum nitride(Mo_(2)N)nanobelt arrays that integrated with conductive carbon paper were obtained via hydrothermal and nitridation method under optimal conditions.Initially,high density MoO_(3) nanobelt arrays were in situ synthesized on carbon paper via the hydrothermal method.The followed nitridation reaction was based on the solid-state topotactic reaction mechanism.After that,arrayed Mo_(2)N nanobelts with closely aligned mesopores were formed.This prepared Mo_(2)N/C could be used as an electrode directly without adding polymer binder or additives.Mo_(2)N/C presented an enhanced electrocatalytic hydrogen evolution performance without loading noble metal.The overpotential for Mo_(2)N porous nanobelt arrays was about-180 mV at 10 mA⋅cm^(-2)current density.And the Tafel slope was at about 81 mV/dec.Compared with MoO_(3)/C,theη10 value of porous Mo_(2)N/C was about-60 mV lower,and Tafel slope was about 94 mV/dec smaller.After nitriding,the electrocatalytic hydrogen evolution property has been improved significantly.The results suggested that porous Mo_(2)N/C possesses a promising potential as self-supporting non-noble metal electrocatalysts for hydrogen evolution.

关 键 词：氮化钼 多孔纳米带阵列 电催化析氢 无粘合剂 自支撑 

分 类 号：O643.36[理学—物理化学]