Article
Chemistry, Multidisciplinary
Xiaoli Jiang, Lei Tang, Lei Dong, Xuedi Sheng, Wenfei Zhang, Zhen Liu, Jianhua Shen, Hongliang Jiang, Chunzhong Li
Summary: In this study, density functional theory (DFT) simulations were used to investigate the site isolation strategy in electrocatalytic selective hydrogenation of acetylene. The results showed that isolated Cu metal sites have higher energy barriers on overhydrogenation and C-C coupling reactions. Based on this, Cu single-atom catalysts highly dispersed on nitrogen-doped carbon matrix were developed and demonstrated high ethylene selectivity under high concentrations of acetylene. The superior performance was attributed to the weak adsorption of ethylene intermediates and highly energy barriers on C-C coupling at isolated sites, as confirmed by both DFT calculations and experimental results. This study provides a comprehensive understanding of the isolated sites inhibiting the side reactions in electrocatalytic acetylene semihydrogenation.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Yalin Guo, Yangyang Li, Xiaorui Du, Lin Li, Qike Jiang, Botao Qiao
Summary: A simple strategy to fabricate Pd single-atom catalysts (SACs) by reducing conventional supported Pd catalysts at suitable temperatures to encapsulate the co-existed Pd nanoparticles/clusters has been reported. The derived Pd SACs exhibit improved ethylene selectivity and high stability in the acetylene selective hydrogenation.
Article
Chemistry, Multidisciplinary
Zeping Wang, Lu Shang, Hongzhou Yang, Yunxuan Zhao, Geoffrey I. N. Waterhouse, Dong Li, Run Shi, Tierui Zhang
Summary: A Cu single-atom electrocatalyst (Cu-SA/TiO2) is successfully synthesized for the efficient selective production of ethylene at low concentrations of acetylene, while suppressing undesired hydrogen evolution. The catalyst exhibits high acetylene conversion and ethylene selectivity, outperforming other reported acetylene reduction catalysts.
ADVANCED MATERIALS
(2023)
Article
Engineering, Environmental
Chenyang Lu, Shihong Zhou, Wenyu Zhou, Cailong Zhou, Qun Li, Aonan Zeng, Anjie Wang, Luxi Tan, Lichun Dong
Summary: A highly selective acetylene selective hydrogenation catalyst (Cu15Pd@C) was successfully prepared, which improves ethylene selectivity while maintaining high activity. The carbon layer promotes the formation of smaller nanoparticles and effectively inhibits the production of green oil associated with acetylene coupling. The same approach was applied to fabricate a series of carbon-confined Cu and Ag-based bimetal catalysts, demonstrating the universality and potential applications of the carbon layer in selective hydrogenation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Engineering, Chemical
Toyin D. Shittu, Olumide B. Ayodele
Summary: This review provides an overview of recent developments in the selective hydrogenation of acetylene, including the application of different catalyst systems and the impact of various process parameters on product selectivity.
FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING
(2022)
Review
Chemistry, Multidisciplinary
Wenwen Gao, Shihuan Liu, Guangxun Sun, Chao Zhang, Yuan Pan
Summary: Selective hydrogenation is a crucial reaction in the fine chemical industry, and the activation of H-2 is a key step. Catalysts, particularly single-atom catalysts (SACs), have shown great potential in activating H-2 for selective hydrogenation due to their high atom utilization and uniform active sites. Further research is needed to design SACs with superior H-2-activating capabilities.
Review
Chemistry, Multidisciplinary
Jiexin Zhu, Lei Lv, Shahid Zaman, Xingbao Chen, Yuhang Dai, Shenghua Chen, Guanjie He, Dingsheng Wang, Liqiang Mai
Summary: This review summarizes the current research progress and future application prospects of electrochemical CO2 methanation on single-site catalysts (SSCs). It discusses the CO2 methanation mechanism, primary activity descriptors, coordination structure and design of SSCs, and several in situ characterization methods for tracking the structural changes in SSCs. This review provides insights into the further exploitation of SSCs for selective CO2 methanation and inspires the rational design of SSCs in electrochemical CO2 methanation research.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Physical
Yu Liang, Qiong Tang, Lei Liu, Dingsheng Wang, Jinxiang Dong
Summary: In this work, a mild hydrolysis method was used to fabricate single-atom Pt catalysts with high oxidation state. The catalysts showed high selectivity for hydrogenation of C--O groups in unsaturated aldehydes. The synergy between highly electron-deficient Pt single-atoms and FeOx species was responsible for the selectivity control and inhibition of further hydrogenation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Chemical
Denglei Gao, Ding Yi, Fei Lu, Sha Li, Lu Pan, Yong Xu, Xi Wang
Summary: Understanding acetylene hydrogenation process at orbital scale using Pt-1-Cu(1 1 1) and Pd-1-Cu(1 1 1) model catalysts can provide insights for catalyst design and pave the way for general catalysis.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Ruijie Gao, Jisheng Xu, Jian Wang, Jongwoo Lim, Chong Peng, Lun Pan, Xiangwen Zhang, Huaming Yang, Ji-Jun Zou
Summary: The study successfully constructed a highly active and stable single palladium-iron catalyst, achieving high activity and selectivity for alkyne hydrogenation and exhibiting excellent performance for purifying acetylene from ethylene streams.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Song Hu, Chong Zhang, Mingyu Wu, Runping Ye, Depan Shi, Mujin Li, Peng Zhao, Rongbin Zhang, Gang Feng
Summary: The purpose of this study is to develop a low-cost, high-performance catalyst for the selective catalytic hydrogenation of acetylene to ethylene. Cu and Ni bimetallic catalysts were prepared and showed high acetylene conversion and ethylene selectivity under optimal reaction conditions. This catalyst has the potential for industrial application.
Article
Materials Science, Multidisciplinary
Shu Zhao, Yan Tang, Xiaohu Yu, Jun Li
Summary: This study investigates the influence of single Pd atom coordination environments and surface properties on the activity and selectivity of Pd-1/TiO2 catalysts for acetylene semi-hydrogenation using density functional theory calculations. A negatively charged four-atom single-cluster catalyst is found to exhibit excellent catalytic performance. The activity and selectivity are highly correlated with surface properties.
SCIENCE CHINA-MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yuxuan Ling, Handong Ge, Jiawen Chen, Yuqi Zhang, Yunxia Duan, Minghui Liang, Yanjun Guo, Tai-Sing Wu, Yun-Liang Soo, Xiong Yin, Liming Ding, Leyu Wang
Summary: A general strategy for the fabrication of hydrophilic single atom catalysts (SACs) by cation-exchange approach is reported. The SACs are highly dispersible and stable in hydrophilic solvents, facilitating catalysis reactions in alcohols.
Article
Chemistry, Multidisciplinary
Mohammed J. Islam, Marta Granollers Mesa, Amin Osatiashtiani, Martin J. Taylor, Mark A. Isaacs, Georgios Kyriakou
Summary: By diluting the Pd content in the alloy, the reaction activity of Cu nanoparticles can be accelerated, leading to increased time for the cascade conversion and higher selectivity towards butanol. Compared to bulk Cu/Al2O3 and Pd/Al2O3 catalysts, the single atom alloy catalysts showed a significant increase in conversion rate. These findings suggest that fine-tuning the dilution of PdCu single atom alloy catalysts can provide cost-effective and sustainable alternatives to traditional monometallic catalysts.
Article
Chemistry, Multidisciplinary
Shang Li, Yuxing Xu, Hengwei Wang, Botao Teng, Qin Liu, Qiuhua Li, Lulu Xu, Xinyu Liu, Junling Lu
Summary: Tuning the coordination environments of metal single atoms in single-atom catalysts have significant impacts on catalytic activity and stability. However, the selectivity in thermocatalysis is often hardly affected. This study demonstrates that simultaneous regulation of both Rh-1 atoms and ZrO2 support with alkali ions enables efficient switching of reaction products in CO2 hydrogenation, leading to exclusive CO formation.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
