[1]王建设,闫杰杰,张 冲,等.Pd/CeO2和Pd/SnO2湿法构筑及催化甲酸盐、乙醇电氧化性能[J].郑州大学学报(工学版),2020,41(06):85-91.[doi:10.13705/j.issn.1671-6833.2020.06.007]
　WANG Jianjian,YAN Jiejie,ZHANG Chong,et al.Wet-chemistry Fabrication of Pd/CeO2 Interfaces and Comparison with Pd/SnO 2 in terms of Formate and Ethanol Electro-oxidation Catalysis[J].Journal of Zhengzhou University (Engineering Science),2020,41(06):85-91.[doi:10.13705/j.issn.1671-6833.2020.06.007]
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Pd/CeO2和Pd/SnO2湿法构筑及催化甲酸盐、乙醇电氧化性能()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
41
期数:
2020年06期
页码:
85-91
栏目:
出版日期:
2020-12-31

文章信息/Info

Title:
Wet-chemistry Fabrication of Pd/CeO2 Interfaces and Comparison with Pd/SnO 2 in terms of Formate and Ethanol Electro-oxidation Catalysis
作者:
郑州大学 化工学院，河南 郑州 450001；清华大学 深圳国际研究生院 广东 深圳 518005
Author(s):
WANG Jianjian;  YAN Jiejie;  ZHANG Chong;  XI Jingyu;  ZHAO Jianhong;  SONG Chengying
School of Chemistry, Zhengzhou University, Zhengzhou 450001, Henan Province, China; Shenzhen International Graduate School, Tsinghua University Guangdong Shenzhen 518005, China
关键词:
湿化学法制备; 界面构筑; Pd/CeO2; Pd/SnO2; 甲酸盐电氧化; 乙醇电氧化
Keywords:
Preparation by wet chemical method;  Interface construction;  Pd/CeO2;  Pd/SnO2;  Formate electrooxidation;  Ethanol electrooxidation
DOI:
10.13705/j.issn.1671-6833.2020.06.007
文献标志码:
A
摘要:
界面在电催化领域发挥着重要作用，探索简易廉价的界面构筑方法对催化剂制备及应用有积极意义。本研究尝试用湿化学法，利用Sn(OH)2的还原作用沉积Pd，利用OH对Ce3+富集实现CeO2在表面沉积，从而构筑Pd/CeO2界面，并经能量色散X射线谱和X射线光电子能谱证实。电化学结果表明，CeO2与Pd形成界面且不影响Pd的电化学活性面积，说明导电性差的金属氧化物也可通过本方法与贵金属构筑界面。鉴于Pd/CeO2和Pd/SnO2两类界面在电催化领域应用广泛, 利用循环伏安法和计时电流法进一步比较了两界面对甲酸盐和乙醇电氧化催化行为。结果表明，Pd/CeO2比Pd/SnO2活性更高，原因或为Pd/CeO2界面可抑制CO类中毒产物吸附。我们认为，该研究所提供界面构筑方法拓展了导电性差金属氧化物在电催化领域的应用。
Abstract:
Interfaces play vital role in various electrocatalysis and thus exploring cheap and facile method for fabricating interfaces is of great significance. In this study, a wet-chemistry method for fabricating Pd/CeO2 interfaces is proposed, in which Pd was in-situ reduced by Sn(OH) 2 while CeO 2 was formed through Ce 3+ enrichment and homogeneous precipitation onto Sn(OH) 4 that is transformed from Sn(OH) 2. The introduction of CeO2 is confirmed by scanning electron microscope , energy-dispersive spectroscopy and X-ray photoelectron spectroscopy. Electrochemical characterization shows that CeO2 replace SnO 2 surface and hardly lowers the electrochemical active surface area of Pd, meaning t hat me＜x＞tal oxides with poor electrical conductivity can be used by this fabrication method. Considering that Pd/CeO2 and Pd/SnO 2 are two widely used interfaces in electrocatalysts, Pd/CeO 2 and Pd/SnO 2 are further compared in terms of formate and ethanol oxidation using cyclic voltammetric and chronoamperometric measurement. It shows that Pd/CeO2 is more active than Pd/SnO 2 for formate and ethanol oxidation, the reason for which might be ascribed to Pd/CeO 2 interface that prohibits CO adsorption. We believe that the present study could provide simple avenue for fabricating interfaces between noble me＜x＞tals and me＜x＞tal oxides even with poor electrical conductivity.
更新日期/Last Update: 2021-02-10