文献类型：期刊文献

英文题名：Preparation and Activity of Nb2O5 center dot nH(2)O-PtRu/C for Methanol Oxidation

作者：Li Weiwei[1,2];Zhang Xiangjun[1];Lu Shigang[1]

第一作者：Li Weiwei;李伟伟

通讯作者：Li, WW[1]

机构：[1]Gen Res Inst Nonferrous Met, R&D Ctr Vehicle Battery & Energy Storage, Beijing 100088, Peoples R China;[2]Xinxiang Univ, Coll Chem & Chem Engn, Xinxiang 453000, Henan, Peoples R China

第一机构：Gen Res Inst Nonferrous Met, R&D Ctr Vehicle Battery & Energy Storage, Beijing 100088, Peoples R China

通讯机构：[1]corresponding author), Gen Res Inst Nonferrous Met, R&D Ctr Vehicle Battery & Energy Storage, Beijing 100088, Peoples R China.

年份：2012

卷号：70

期号：9

起止页码：1073-1080

外文期刊名：ACTA CHIMICA SINICA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000304633100005)】；

基金：Project supported by the National High Technology Research and Development Program (No. 2007AA03Z245).

语种：英文

外文关键词：heat treatment; methanol; Nb2O5 center dot nH(2)O; PtRu/C

摘要：10%Nb2O5 center dot nH(2)O-20%Pt10%Ru/C electro-catalyst for methanol oxidation was prepared by deposition method, followed with heat treatment in Ar atmosphere. The effect of heat treatment on morphology, structure and electrochemistry performance of the product was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), cyclic voltammetry and chronoamperograms. No diffraction peaks of Ru were observed in the XRD patterns, while all the peaks of Pt were in accordance with the face centered cubic crystal structure. The binding energy of Pt was not affected by Nb2O5 center dot nH(2)O. Compared with 20%Pt10%Ru/C, in 10%Nb2O5 center dot nH(2)O-20%Pt10%Ru/C samples, the activated particles were uniformly dispersed, and the performances of methanol oxidation and resistance to "CO" were better. The results indicated that the introduction of Nb2O5 center dot nH(2)O inhibited the growth of active particles, and decreased the alloying degree of Pt-Ru during heat treatment. Besides, Nb2O5 center dot nH(2)O also provided active "-OH" and improved H+ transfer, leading to easier adsorption-desorption of methanol and its oxidation intermediates.