Morphology-dependent electrocatalytic performance of Fe_(2)(MoO_(4))_(3) for electro-oxidation of methanol in alkaline medium  

作　　者：Daoming Zhang Liheng Zhang Wei Zhang Mengfei Huo Jiajia Yin Guoju Dang Zhen Ren Quansheng Zhang Jingying Xie Samuel S.Mao 

机构地区：[1]School of Chemical and Environmental Engineering,Shanghai Institute of Technology,Shanghai 201418,China [2]Shanghai Institute of Space Power Sources,Shanghai 200245,China [3]Department of Mechanical Engineering,University of California at Berkeley,Berkeley CA94720,USA [4]Samuel Mao Institute of New Energy,Science Hall,Shenzhen 518031,China

出　　处：《Journal of Materiomics》2017年第2期135-143,共9页无机材料学学报（英文）

基　　金：This work was supported by the National Natural Science Foundation of China(No.21373137);National 863 program(No.2014AA052202);Shanghai Science and Technology Development Funds(No.13DZ2280200&No.15DZ2282000);SSM also thanks the support of Shenzhen Overseas High-Level Talent Innovation and Entrepreneurship Team special funds(No.1208040050847074).

摘　　要：Electrochemically synthesized nanosphere,nanorod and nanotube Fe_(2)(MoO_(4))_(3) at optimized temperature and current density are characterized with XRD,SEM,TEM,XPS.Crystal lattices of the three types Fe_(2)(MoO_(4))_(3) detected by HRTEM are well matched with the simulation analysis results from Materials Studio 6.0 based on the inorganic crystal structure database(ICSD)data and the modified XRD lattice parameters.The ratios of Fe/Mo on the surface resulted from XPS analysis are 1.47,1.63 and 2.22 respectively for nanosphere,nanorod and nanotube.The mixture of Fe_(2)(MoO_(4))_(3) with polytetrafluoroethylene dispersion are coated on glass carbon substrate as electrode for electrocatalytic performance test by cyclic voltammetries in 0.1 mol/L KOH and 1 mol/L methanol electrolyte.Methanol oxidation peak current density of the Nanotube-Fe_(2)(MoO_(4))_(3)/GCEs electrode is 3.27 mA/cm^(2) higher than 2.8 mA/cm^(2) of platinum foil electrode,which shows enhanced catalytic activity of Nanotube-Fe_(2)(MoO_(4))_(3)/GCEs.The cyclic stability in terms of peak current retention are 91%,92%and 88%respectively for Nanosphere-Fe_(2)(MoO_(4))_(3)/GCE,Nanorod-Fe_(2)(MoO_(4))_(3)/GCE and Nanotube-Fe_(2)(MoO_(4))_(3)/GCE electrode after 220 cycles.It is concluded that nanosized Fe_(2)(MoO_(4))_(3) could be promising alternative non-noble electro-catalysts for electro-oxidation of methanol in alkaline medium.

关 键 词：ELECTROCHEMISTRY Methanol electro-oxidation Fe_(2)(MoO_(4))_(3) 

分 类 号：O64[理学—物理化学]