TiO_(2)纳米管沉积NiMo合金纳米阵列制备高效HER催化剂  

Preparation of Highly Efficient HER Catalyst by TNAs Deposition of NiMo Alloy Nanoarray

作　　者：魏冕 李金庭 周赟 席生岐[1] 高圆[1] 吴宏京[1] 甘雨 彭文山 Wei Mian;Li Jinting;Zhou Yun;Xi Shengqi;Gao Yuan;Wu Hongjing;Gan Yu;Peng Wenshan(State Key Laboratory for Mechanical Behavior of Materials,School of Materials Science and Engineering,Xi’an Jiaotong University,Xi’an 710049,China;Xi’an XD Surge Arrester Co.,Ltd,Xi’an 710299,China;Key Laboratory of Marine Corrosion and Protection,725th Research Institute of China Shipbuilding Industry Corporation,Qingdao 266237,China)

机构地区：[1]西安交通大学材料科学与工程学院金属材料强度国家重点实验室,陕西西安710049 [2]西安西电避雷器有限责任公司,陕西西安710299 [3]中国船舶重工集团公司第七二五研究所海洋腐蚀与防护重点实验室,山东青岛266237

出　　处：《稀有金属材料与工程》2022年第10期3819-3825,共7页Rare Metal Materials and Engineering

基　　金：中国船舶重工集团公司第七二五研究所海洋腐蚀与防护重点实验室开放研究基金(6142901180402);西安西电避雷器有限责任公司压敏电阻冷烧结工艺项目(20210408)。

摘　　要：制备高效稳定的非贵金属催化剂对于电解水生产高纯度氢气的发展至关重要。本实验通过简单的阳极氧化法和电沉积方法制备NiMo/TNAs复合催化剂,将NiMo合金颗粒通过电沉积方法稳固包覆于TNAs独特的弯曲有序界面上,当沉积电流和电解液Mo离子浓度变化时,NiMo的沉积状态和催化能力也随之改变,经过研究表明,在沉积电流密度15 mA·cm^(-2),Mo离子浓度4 g·L^(-1)条件下沉积1 min制备的样品具有更高的析氢反应(HER)催化性能。通过更大活性表面积,更便捷的离子传输通道和增强的结构稳定性,获得了优异的催化活性的NiMo/TNAs电催化剂。NiMo/TNAs催化剂的起始过电位仅为50 mV,分别在110和227 mV低过电势下获得10和100 mA·cm^(-2)的电流密度。因此得到结论,将NiMo合金颗粒沉积在TNAs纳米阵列,在酸性条件下具有优异催化性能和稳定性。The preparation of efficient and stable non-precious metal catalysts is crucial for the development of electrolysis of water to produce high-purity hydrogen.In this experiment,the NiMo/TNAs composite catalyst was prepared by a simple anodization method and electrodeposition method.The NiMo alloy particles were stably coated on the unique curved and ordered interface of TNAs by the electrodeposition method.When the deposition current and the electrolyte Mo ion concentration changed,the deposition state and catalytic ability of NiMo also changed at the same time.The results show that the samples prepared under the conditions of deposition current density of 15 mA·cm^(-2) and Mo ion concentration of 4 g·L^(-1) for 1 min have higher hydrogen evolution reaction(HER)catalytic performance.NiMo/TNAs electrocatalysts with excellent catalytic activity are obtained through larger active surface area,more convenient ion transport channels,and enhanced structural stability.The onset overpotential of the NiMo/TNAs catalyst is only 50 mV,and current densities of 10 and 100 mA·cm^(-2) are obtained at low overpotentials of 110 and 227 mV,respectively.Therefore,it is concluded that NiMo/TNAs catalysts prepared by depositing NiMo alloy particles on TNAs nanoarrays have excellent catalytic performance and stability under acidic conditions.

关 键 词：非贵金属催化剂 电沉积 电解水制氢 二氧化钛 

分 类 号：O643.36[理学—物理化学]