Insight into the high efficiency of Cu/CeO_2(110) catalysts for preferential oxidation of CO from hydrogen rich fuel

Wang Yongke; Zhang Qiuyue; Lin Yuwen; Huang Wujun; Ding Ding; Zheng Yanping; Chen Mingshu; Wan Huilin

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Insight into the high efficiency of Cu/CeO_2(110) catalysts for preferential oxidation of CO from hydrogen rich fuel

机译：洞察Cu / CeO_2（110）催化剂的高效率，用于氢气富氢氢的优先氧化

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Ceria nanosheets with predominantly exposing {110} planes had been synthesized, and used as supports to prepare copper-based catalysts for preferential oxidation of CO from hydrogen rich fuel (PROX). The 3 wt% CuO/CeO2 (110) catalyst shows excellent catalytic performance, achieving Con. 100% and Sel. 99.8% at 90 degrees C after a pretreatment with the reaction gas. Quasi in-situ XPS and HS-LEIS results, as well as CO-DRIFTS, reveal that the relative ratio and dispersion of Cu+ on the surface increase after treating with the reaction gas. These results disclose that the interface between Cu+ and CeO2 should play main roles for CO oxidation. The obtained apparent activation energy for hydrogen oxidation is much higher than that for CO oxidation. The selectivity for H-2 oxidation increases significantly and Cu-0 appears concurrently at a higher reaction temperature, leading that Cu-0 is more favor for H-2 oxidation. Therefore, to stabilize Cu+ on CeO2 is the key to achieve high catalytic performance for PROX.

机译：已经合成了主要曝光{110}平面的Ceria Nanoshs，并用作制备铜基催化剂的催化剂，以便从氢气（Prox）中的CO的优先氧化氧化。 3wt％CuO / CeO 2（110）催化剂显示出优异的催化性能，实现孔。 100％和sel。在用反应气体预处理后99.8％在90摄氏度下。准原位XPS和HS-leise＆Hs-leise as，以及共漂移，揭示了Cu +在用反应气体处理后Cu +对表面增加的相对比和分散。这些结果揭示了Cu +和CeO2之间的界面应该发挥共同氧化的主要作用。获得的氢氧化的明显活化能量远高于共氧化的能量。 H-2氧化的选择性显着增加，Cu-0同时出现在更高的反应温度下，导致Cu-0更有利于H-2氧化。因此，在CEO 2上稳定Cu +是实现Prox的高催化性能的关键。

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来源
《Applied Surface Science》 |2021年第15期|150707.1-150707.10|共10页
作者
Wang Yongke; Zhang Qiuyue; Lin Yuwen; Huang Wujun; Ding Ding; Zheng Yanping; Chen Mingshu; Wan Huilin;
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作者单位

Xiamen Univ Coll Chem & Chem Engn State Key Lab Phys Chem Solid Surfaces Dept Chem Natl Engn Lab Green Chem Prod Alcohols Ethers Est Xiamen Fujian Peoples R China;

Xiamen Univ Coll Chem & Chem Engn State Key Lab Phys Chem Solid Surfaces Dept Chem Natl Engn Lab Green Chem Prod Alcohols Ethers Est Xiamen Fujian Peoples R China;

Xiamen Univ Coll Chem & Chem Engn State Key Lab Phys Chem Solid Surfaces Dept Chem Natl Engn Lab Green Chem Prod Alcohols Ethers Est Xiamen Fujian Peoples R China;

Xiamen Univ Coll Chem & Chem Engn State Key Lab Phys Chem Solid Surfaces Dept Chem Natl Engn Lab Green Chem Prod Alcohols Ethers Est Xiamen Fujian Peoples R China;

Xiamen Univ Coll Chem & Chem Engn State Key Lab Phys Chem Solid Surfaces Dept Chem Natl Engn Lab Green Chem Prod Alcohols Ethers Est Xiamen Fujian Peoples R China;

Xiamen Univ Coll Chem & Chem Engn State Key Lab Phys Chem Solid Surfaces Dept Chem Natl Engn Lab Green Chem Prod Alcohols Ethers Est Xiamen Fujian Peoples R China;

Xiamen Univ Coll Chem & Chem Engn State Key Lab Phys Chem Solid Surfaces Dept Chem Natl Engn Lab Green Chem Prod Alcohols Ethers Est Xiamen Fujian Peoples R China;

Xiamen Univ Coll Chem & Chem Engn State Key Lab Phys Chem Solid Surfaces Dept Chem Natl Engn Lab Green Chem Prod Alcohols Ethers Est Xiamen Fujian Peoples R China;

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正文语种 eng
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关键词
Preferential oxidation of CO in H-2; CO oxidation; Copper based catalyst; Ceria(110); Quasi in-situ XPS and HS-LEIS;

机译：CO在H-2中的优先氧化;共氧化;基于铜的催化剂;CERIA（110）;准原位XPS和HS-LIN;

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1. Effects of sodium addition on the performance of PtCo/Al2O3 catalysts for preferential oxidation of carbon monoxide from hydrogen-rich fuels [J] . Kwak C, Park TJ, Suh DJ Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications . 2005,第2期

机译：钠添加对PtCo / Al2O3催化剂优先氧化富氢燃料中一氧化碳性能的影响
2. Effects of sodium addition on the performance of PtCo/Al2O3 catalysts for preferential oxidation of carbon monoxide from hydrogen-rich fuels [J] . Kwak C, Park TJ, Suh DJ Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications . 2005,第2期

机译：钠添加对PtCo / Al2O3催化剂优先氧化富氢燃料中一氧化碳性能的影响
3. Inverse CeO_2/CuO Catalyst As an Alternative to Classical Direct Configurations for Preferential Oxidation of CO in Hydrogen-Rich Stream [J] . A. Hornes, A. B. Hungrfa, P. Bera, Journal of the American Chemical Society . 2010,第1期

机译：反向CeO_2 / CuO催化剂可替代富氢流中CO优先氧化的经典直接构型
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机译：使用原位红外在富氢流化Cu-Ce基催化剂中CO的优先氧化特性
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Insight into the high efficiency of Cu/CeO_2(110) catalysts for preferential oxidation of CO from hydrogen rich fuel

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