Mn_(3)O_(4)-Ni/C@FeOOH复合材料的界面构筑及其在电解水制氢中的应用  

Interfacial Fabrication of Mn_(3)O_(4)-Ni/C@FeOOH Composite Material and its Application in Hydrogen Production by Water Electrolysis

作　　者：王清翔 邓腾 唐红梅 WANG Qingxiang;DENG Teng;TANG Hongmei(School of Earth Sciences,East China University of Technology,Nanchang 330013,China;Energy Research Institute of Jiangxi Academy of Science,Nanchang 330096,China;Jiangxi Carbon Neutralization Research Center,Nanchang 330096,China)

机构地区：[1]东华理工大学地球科学学院,南昌330013 [2]江西省科学院能源研究所,南昌330096 [3]江西省碳中和研究中心,南昌330096

出　　处：《能源研究与管理》2024年第2期54-60,共7页Energy Research and Management

基　　金：江西省科学院包干制试点示范项目(2022YSBG22017);江西省科学院基础研究项目(2023YJC2010)。

摘　　要：为制备一种高效、低能耗的电解水制氢催化剂,采用溶剂热法制备了Ni掺杂的前驱体Mn-Ni MIL,再通过高温热处理法将其碳化成Mn_(3)O_(4)-Ni/C基底,随后以水浴沉积法将无定型结构FeOOH超细颗粒负载在Mn_(3)O_(4)-Ni/C基底表面,得到同时含Mn、Ni、Fe 3种金属元素的复合材料Mn_(3)O_(4)-Ni/C@FeOOH。基于Mn_(3)O_(4)-Ni/C@FeOOH复合材料的形貌和结构表征可知,其保留了前驱体的八面体形貌,其中Ni以金属单质形式均匀分布在碳质基底中,且FeOOH的负载保证了材料的高比表面积,为后续的催化反应提供充足的活性位点。电化学性能测试结果显示所得复合材料Mn_(3)O_(4)-Ni/C@FeOOH的碱性电解水阳极析氧催化活性优良,在驱动电流密度10 mA/cm2时所需的过电势为288 mV,与其复合前的单独组分Mn_(3)O_(4)-Ni/C(334 mV)和FeOOH(342 mV)相比,分别提升了14%和16%。通过界面构筑合成的Mn_(3)O_(4)-Ni/C@FeOOH复合材料具有低成本、长周期稳定的竞争优势,在商业应用方面前景广阔。In order to prepare a high efficiency and low energy consumption catalyst for hydrogen production by electrolytic water,this study utilized a solvothermal method to prepare Ni-doped precursor Mn-Ni MIL,which was then carbonized into Mn_(3)O_(4)-Ni/C substrate through high-temperature heat treatment.Subsequently,amorphous FeOOH ultrafine particles were deposited on the surface of the Mn_(3)O_(4)-Ni/C substrate using a water bath precipitation method,resulting in a composite material containing Mn,Ni,and Fe metal elements,namely Mn_(3)O_(4)-Ni/[e-mail] on morphology and structural characterization,it was found that the Mn_(3)O_(4)-Ni/C@FeOOH composite material retained the octahedral morphology of the precursor.The Ni was uniformly distributed in metallic form within the carbonaceous substrate,and the loading of FeOOH ensured a high specific surface area of the material,providing sufficient active sites for subsequent catalytic reactions.Electrochemical test results demonstrated excellent oxygen evolution reaction catalytic activity of the obtained composite material Mn_(3)O_(4)-Ni/C@FeOOH in alkaline electrolysis,with an overpotential of 288 mV at a driving current density of 10 mA/cm2.Compared to the individual components Mn_(3)O_(4)-Ni/C(334 mV)and FeOOH(342 mV)before composite formation,this represented an improvement of 14%and 16%,respectively.This study has shown that the Mn_(3)O_(4)-Ni/C@FeOOH composite material synthesized through interface engineering has a competitive advantage of low cost and long-term stability,making it promising for commercial applications.

关 键 词：Mn_(3)O_(4) Ni掺杂 碳质基底 FEOOH 碱性电解水 

分 类 号：TQ116.21[化学工程—无机化工] TQ426