Unravelling the active sites and structure-activity relationship on Cu-ZnO-Al2O3 based catalysts for water-gas shift reaction

被引：40

作者：

Ahn, Seon-Yong ^{[1
]}

Kim, Kyoung-Jin ^{[1
]}

Kim, Beom-Jun ^{[1
]}

Shim, Jae-Oh ^{[2
]}

Jang, Won-Jun ^{[3
]}

Roh, Hyun-Seog ^{[1
]}

机构：

[1] Yonsei Univ, Dept Environm & Energy Engn, 1 Yonseidae Gil, Wonju 26493, Gangwon, South Korea

[2] Wonkwang Univ, Dept Chem Engn, 460 Iksan Daero, Iksan 54538, Jeonrabuk, South Korea

[3] Kyungnam Univ, Dept Environm & Energy Engn, 7 Kyungnamdaehak Ro, Chang Won 51767, Gyeongsangnam, South Korea

来源：

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2023年 / 325卷

基金：

新加坡国家研究基金会;

关键词：

Water gas shift; Hydrogen production; Structure insensitivity; Cu content; Cu plus; DIMETHYL OXALATE; CARBON-MONOXIDE; COPPER; CU; HYDROGENATION; PERFORMANCE; OXIDATION; OPTIMIZATION; REDUCTION; MECHANISM;

D O I：

10.1016/j.apcatb.2022.122320

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Herein, we investigated the main active sites and structure-sensitivity of the water-gas shift (WGS) reaction over ternary Cu-ZnO-Al2O3 (CZA) catalysts. CZA catalysts with various Cu contents were synthesized by the ho-mogeneous one-step coprecipitation method. The Cu content mainly affected the number of active Cu sites and was closely related to the WGS activity. Turnover frequency (TOF) values were independent of Cu dispersion, indicating that the CZA catalyst is structure-insensitive in WGS. The ratio of surface Cu+ species also strongly influenced the activity of the CZA catalyst. TOF based on the total active Cu species showed a constant value, but the CO conversion was linearly increased with the number of surface Cu+ species.

引用

页数：14

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