Article
Chemistry, Physical
Shaoxia Guo, Guilong Liu, Yuan Zhang, Yuan Liu
Summary: In this study, oxygen vacancies enhanced Co-Co2C catalyst was successfully fabricated, and it was found that oxygen vacancies played a crucial role in the formation of higher alcohols on the catalyst. The synergism effect between Co, Co2C, and oxygen vacancies contributed to the excellent alcohol selectivity and stability of the catalyst, providing insights into the catalytic mechanism of oxygen vacancies promoted Co-Co2C catalyst for higher alcohol synthesis.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Shaoxia Guo, Zhuoshi Li, Rui Yin, Jianbao Li, Zhuang Zeng, Zhiwei Hu, Guangyuan Luo, Jing Lv, Shouying Huang, Yue Wang, Xinbin Ma
Summary: In this study, a CoMnOx nanocomposite catalyst prepared by the sol-gel method was found to selectively produce short-chain alcohols, particularly ethanol, in higher alcohol synthesis from syngas. The presence of oxygen vacancies in MnOx was shown to enhance the reaction and interact with neighboring Co2C, leading to the production of ethanol and other short-chain alcohols in HAS.
Article
Engineering, Environmental
Shaoxia Guo, Zhuoshi Li, Yajun Li, Zhuang Zeng, Jing Lv, Shouying Huang, Yue Wang, Xinbin Ma
Summary: A series of catalysts prepared by thermal decomposing CoMn-MOF materials were used for the synthesis of higher alcohols (HA) from syngas. The catalyst with a remaining MOF framework exhibited excellent stability and displayed a superior selectivity to HA, with an alcohol selectivity of 57.5% and a distribution of C2+OH in total alcohols up to 82.4% at a CO conversion of 51.5%. This study highlights a feasible strategy for designing highly efficient catalysts for HA synthesis via partial decomposing MOF materials.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Shiva Fazlikeshteli, Xavier Vendrell, Jordi Llorca
Summary: In this study, monometallic Ru, Pd, and bimetallic Ru-Pd catalysts were prepared via mechanochemical and conventional incipient wetness impregnation methods and used in the partial oxidation of methane (POM). The results showed that bimetallic catalysts exhibited higher catalytic activity and stability compared to monometallic ones, and the catalysts prepared by mechanochemical method produced synthesis gas at a lower temperature compared to conventional catalysts.
Article
Chemistry, Applied
Yanwei Zhu, Jianqiao Shi, Yingying Li, Yuxuan Lu, Bo Zhou, Shuangyin Wang, Yuqin Zou
Summary: This study demonstrates the superior electrocatalytic oxidation performance of graphene-encapsulated CoCu for the conversion of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA). The exceptional catalytic activity is attributed to local structural distortion and the sub-nanometer lattice composition of the CoCu surface. The experimental results reveal the presence of dispersed Cu-doped Co3O4 nano-islands with edge sites on the bimetallic Co-Cu surface, which facilitate the catalytic reaction. Additionally, the gradient components aid in establishing a built-in electric field and accelerating charge transfer. Theoretical and experimental findings suggest that the surface Co and neighboring Cu atoms in the sub-nanometer lattice synergistically promote the catalysis of HMF. This work provides new insights into controlling the spatial distribution of elements for catalysis.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Review
Chemistry, Multidisciplinary
Xianhua Zhang, Rui Liu, Tao Liu, Chunlei Pei, Jinlong Gong
Summary: Methane has potential as a promising alternative to crude oil for energy fuels and chemicals. Chemical looping methane conversion, among various techniques, allows for efficient utilization of methane with minimal environmental impact and energy loss. Understanding of redox catalysts that combine surface reaction and bulk oxygen transport is crucial to enhance reaction performance.
TRENDS IN CHEMISTRY
(2023)
Article
Chemistry, Physical
Zhuang Zeng, Zhuoshi Li, Tong Guan, Shaoxia Guo, Zhiwei Hu, Junhu Wang, Alexandre Rykov, Jing Lv, Shouying Huang, Yue Wang, Xinbin Ma
Summary: In this study, CoFe bimetallic carbide catalysts were prepared and found to exhibit excellent catalytic performance and stability in higher alcohols synthesis. The catalysts could form ε-(CoxFe1-x)(2.2)C species at high temperature, promoting the selective conversion of CO, and the addition of proper content of Na could modulate the surface concentration of intermediates, enhancing the catalytic activity.
JOURNAL OF CATALYSIS
(2022)
Review
Chemistry, Physical
Paivi Maki-Arvela, Atte Aho, Irina Simakova, Dmitry Yu Murzin
Summary: Recent developments in the transformation of syngas to higher alcohols are critically summarized in this review. The production of jet fuel from alcohols has gained interest due to the urgent need for sustainable sources. Different pathways and catalysts are discussed, along with the challenges of increasing selectivity and suppressing the formation of unwanted byproducts.
Article
Chemistry, Applied
Pedro Nothaft Romano, Jose Faustino Souza de Carvalho Filho, Joao Monnerat Araujo Ribeiro de Almeida, Eduardo Falabella Sousa-Aguiar
Summary: A series of mono and bimetallic catalysts based on Ni, Rh, and Pd supported on different materials were evaluated for the dry reforming of methane reaction. Ni-based catalysts suffered from deactivation but could be regenerated, while Pd-based catalysts deactivated due to coke deposition. Rh-based catalysts showed remarkable activity and stability.
Article
Chemistry, Multidisciplinary
Sihang Liu, Chengsheng Yang, Shenjun Zha, Dmitry Sharapa, Felix Studt, Zhi-Jian Zhao, Jinlong Gong
Summary: This study investigates the dual effect of surface segregation and varied CO coverage on the reactivity of CoCu alloy in CO2 hydrogenation reactions. The relationship between C-O bond scission and further hydrogenation of intermediate *CH2O was found to be crucial for ethanol production. Theoretical investigation suggests that moderate Co segregation can enhance selectivity to ethanol, in agreement with experimental results inspired by theory.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Nanoscience & Nanotechnology
Zhangsen Chen, Gaixia Zhang, Yuren Wen, Ning Chen, Weifeng Chen, Tom Regier, James Dynes, Yi Zheng, Shuhui Sun
Summary: This study focuses on the synthesis of atomically dispersed Co, Fe bimetallic catalysts for syngas generation from ECO2RR. The bimetallic catalyst shows enhanced CO production with a boosted Faradaic efficiency and tunable H2/CO ratio in a wide potential window, demonstrating its versatility and potential application in ECO2RR.
NANO-MICRO LETTERS
(2022)
Article
Chemistry, Physical
Juti Rani Deka, Diganta Saikia, Ning-Fang Lu, Ke-Ting Chen, Hsien-Ming Kao, Yung-Chin Yang
Summary: Bimetallic CoCu nanoparticles are embedded in mesoporous silica SBA-16 functionalized with -COOH groups, allowing for controlled size and dispersion. The catalyst CoCu@S16LC-20 shows superior catalytic activity in the hydrolysis of ammonia borane and reduction of 4-nitrophenol compared to monometallic counterparts Co and Cu.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Defang Liang, Yishuang Wang, Mingqiang Chen, Xuanlan Xie, Chang Li, Jun Wang, Liang Yuan
Summary: This study successfully synthesized a highly efficient Ni-Co alloy catalyst, which can effectively treat greenhouse gases and produce high-value products through methane dry reforming. The research provides important guidance for the development of clay-based metallic Ni catalysts and their applications in syngas production.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Junhui Liu, Bing Li, Yaowei Dong, Qi Liu, Yakun Song, Yafei Guo, Yuan Zhao, Xiang Li, Jian Xiong
Summary: The hydrolysis of ammonia borane is a secure and promising method for producing and employing hydrogen in mild conditions. The synthesis of bimetallic catalysts is an efficient way to boost the hydrogen generation rate. The regulation and control of the synergistic effect between Co and Cu is essential for the rational design of high-performance bimetallic catalysts.
Article
Nanoscience & Nanotechnology
Hong Xu, Di Hu, Man Zhang, Yuchen Wang, Zhiyue Zhao, Zhiwei Jiang, Hector F. Garces, Kai Yan
Summary: This study presents a modified strategy to synthesize highly dispersed noble-metal-free bimetallic NiCu alloy nanoparticles for the selective hydrogenation of levulinic acid, in which the ligand effect between Ni and Cu plays a crucial role. The catalyst with a Ni/Cu ratio of 1:2 exhibited the best catalytic performance, achieving an outstanding yield of 93.9% for gamma-valerolactone.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
Junjie Su, Zhengpai Zhang, Donglong Fu, Da Liu, Xin-Chao Xu, Bianfang Shi, Xu Wang, Rui Si, Zheng Jiang, Jing Xu, Yi-Fan Han
JOURNAL OF CATALYSIS
(2016)
Article
Engineering, Chemical
Lin Zhang, Junjie Su, Haibo Zhou, Su Liu, Chang Liu, Wenqian Jiao, Yangdong Wang
Summary: The introduction of K in the catalyst can inhibit the production of paraffins on oxides at high CO conversion and further enhance the catalytic performance.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Junjie Su, Chang Liu, Songlin Liu, Yingchun Ye, Yujue Du, Haibo Zhou, Su Liu, Wenqian Jiao, Lin Zhang, Chuanming Wang, Yangdong Wang, Zaiku Xie
Summary: Tailoring silicoaluminophosphate zeolite structure and acid site strength can achieve high selectivity to ethylene and propylene in the direct conversion of syngas, showing potential for industrial applications. By comparing and controlling catalysts, better results can be achieved.
CELL REPORTS PHYSICAL SCIENCE
(2021)