Article
Engineering, Environmental
Yan Resing Dias, Oscar W. Perez-Lopez
Summary: Mitigating CO2 emissions has become an important issue nowadays, and converting CO2 to CH4 as a natural gas substitute and H2 storage source is an interesting alternative. In this study, Ni/SiO2 catalysts promoted by Fe, Co and Zn were prepared and showed improved performance in CO2 conversion to methane, with Ni-Co/SiO2 achieving the best results in terms of CO2 conversion and CH4 selectivity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Zhongliang Huang, Yujia Yuan, Miaomiao Song, Zhimian Hao, Jingran Xiao, Dongren Cai, Abdul-Rauf Ibrahim, Guowu Zhan
Summary: The study demonstrates the importance of Pt/Ni ratio in determining the product selectivity in CO2 hydrogenation. Methane becomes the major product only when the Ni/Pt ratio is increased to 9. The enrichment of Pt on the catalyst surface is crucial for improving catalytic performance and stability.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Chemistry, Physical
Yingrui Zhao, Valentina Girelli, Ovidiu Ersen, Damien P. Debecker
Summary: In the power-to-gas scenario, surplus renewable electricity is stored in the form of methane by reacting green hydrogen with waste CO2. Low-cost catalysts with high activity at low temperature are necessary. This study introduces the sol-gel preparation of high-loading mesoporous Ni/SiO2 catalysts. Characterization techniques show that small Ni particles are obtained, even at high loading. The catalyst with the best performance achieved a specific activity almost three times higher than a reference catalyst prepared by impregnation.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Physical
Haipeng Chen, Pei Liu, Jinqiang Liu, Xun Feng, Shixue Zhou
Summary: The study presents a Ni-incorporated MgO/MgH2 material synthesized via a facile mechanochemical ball-milling method for thermo-catalytic CO2 methanation. The material achieves high catalytic performance in converting CO2 to CH4 with superior selectivity at low temperature. This selective hydrogenation process can potentially inspire the design of catalysts for the conversion of CO2 to value-added chemicals.
JOURNAL OF CATALYSIS
(2021)
Article
Multidisciplinary Sciences
Kristijan Lorber, Petar Djinovic
Summary: The article discusses the feasibility of photo-thermal reduction of carbon dioxide and showcases the role of transition metal nanoparticles on suitable catalysts. Future research directions are also provided.
Article
Chemistry, Physical
Paola Riani, Ioannis Valsamakis, Tullio Cavattoni, Vicente Sanchez Escribano, Guido Busca, Gabriella Garbarino
Summary: Ni-based catalysts with enhanced thermal stability and catalytic performance for CO2 methanation have been synthesized, and it was found that La2O3 plays a promoting role in the reaction.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Xinru Yang, Min Huang, Hongyang Huang, Dalin Li, Yingying Zhan, Lilong Jiang
Summary: A series of supported Ni catalysts were prepared and investigated for CO2 methanation. The catalysts exhibited different structural properties and catalytic activities depending on the Ni:Mg molar ratio. Among the catalysts, Ni2Mg1Al-HT showed the highest activity and stability, with well-dispersed Ni particles and a large amount of surface Ni-0 species. The reaction was found to proceed via the formate formation route.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Ziyi Zhang, Yunhao Zang, Feng Gao, Jiangying Qu, Jianfeng Gu, Xuetan Lin
Summary: A sulfur-containing zirconia supported nickel catalyst was prepared to convert CO2 to CO efficiently and stably. By adjusting the support size, the catalyst showed improved activity and achieved high CO2 conversion with selective production of CO.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Applied
Elena Spennati, Gabriella Garbarino, Letizia Savio, Luca Vattuone, Paola Riani, Guido Busca
Summary: Catalysts with different cobalt loadings and supports were prepared and characterized. The catalytic activities for CO2 hydrogenation were evaluated, and the results showed that the catalyst with 5 wt% Co on pure gamma-Al2O3 mainly exhibited reverse Water Gas Shift (rWGS) activity, while the catalyst with 13.6 wt% Co on pure gamma-Al2O3 showed methanation activity. The addition of silica decreased the selectivity to CO but enhanced the methanation activity. The 13.6 wt% Co/gamma-Al2O3 catalyst had lower selectivity but higher stability compared to Ni/gamma-Al2O3 catalysts and unsupported cobalt and Co/SiO2 catalysts. The effect of silica on the catalysts was a combination of increasing the total surface area and decreasing the available surface area for cobalt dispersion.
Article
Chemistry, Multidisciplinary
Nur Athirah Ayub, Hasliza Bahruji, Abdul Hanif Mahadi
Summary: The study showed that the addition of barium to Ni/Sm2O3 catalyst significantly improved CO2 methanation reaction, including increasing CO2 conversion rate and enhancing the basicity of the catalyst. Barium also transformed the morphology of Sm2O3 into nanoparticles, creating interparticle porosity that improved heat transfer efficiency during long catalytic reactions.
Article
Chemistry, Multidisciplinary
Chia-Hung Chen, Hong-Kai Chen, Wei-Hsiang Huang, Chi-Liang Chen, Kittisak Choojun, Tawan Sooknoi, Hong-Kang Tian, Yu-Chuan Lin
Summary: Investigation of Ni/SiO2-based catalysts for the catalytic hydrogenation of CO2 to CO via the reverse water-gas shift showed that the Ni0.2@S-1-red catalyst exhibited promising performance with a CO2 conversion rate approaching equilibrium, high selectivity for CO, and a high space time yield of CO. The results were attributed to the highly dispersed Ni0 and Ni2+ species, as well as the presence of bridging oxygen in the Ni-O-Si structure, allowing for moderate adsorption of CO2 and efficient desorption of its reduced intermediate, *CO. Complementary DFT calculations supported the rapid desorption of *CO and the high selectivity of CO on the Ni@S-1 surface. The structure-activity correlation analysis further confirmed Ni0.2@S-1-red as a promising RWGS catalyst.
Article
Chemistry, Multidisciplinary
Chia-Hung Chen, Hong-Kai Chen, Wei-Hsiang Huang, Chi-Liang Chen, Kittisak Choojun, Tawan Sooknoi, Hong-Kang Tian, Yu-Chuan Lin
Summary: Investigation on catalytic hydrogenation of CO2 to CO via reverse water-gas shift (RWGS) was conducted using Ni/SiO2-based catalysts. The Ni/SiO2 catalyst derived from the reduction of silicalite-1-encapsulated, ligand-protected Ni2+ (Ni0.2@S-1-red) showed promising performance with high CO2 conversion rate, selectivity for CO, and space time yield of CO. The highly dispersed Ni0 and Ni2+ species, along with the presence of bridging oxygen of Ni-O-Si structure, contributed to the observed outcomes.
Article
Chemistry, Physical
Xin Xiao, Jiajie Wang, Jing Li, Hui Dai, Fangli Jing, Yan Liu, Wei Chu
Summary: Mn-doped NiMgAl mixed-oxide catalysts showed enhanced catalytic performance, with NiMn5-LDO delivering the best results. Mn dopants tuned the interaction between Ni and Mg(Mn)AlOx support, promoting the reduction of NiO and achieving a higher surface basicity strength.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Guilin Zhou, Xing Ai, Yunqi Tian, Rui Huang, Yongcheng Feng, Jianmin Ren
Summary: In this study, a Co/KIT-6 catalyst with high specific surface area and well-developed ordered mesoporous structure was prepared and characterized. The active metal Co species highly dispersed on the catalyst were identified as the main active centers for CO2 hydrogenation. The catalyst showed high activity and stability in CO2 hydrogenation, with over 47% CO2 conversion and selective generation of CO and CH4.
GREENHOUSE GASES-SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
Wei Wang, Ekaterina Toshcheva, Adrian Ramirez, Genrikh Shterk, Rafia Ahmad, Mustafa Caglayan, Jose Luis Cerrillo, Abhay Dokania, Gerard Clancy, Tuiana B. Shoinkhorova, Nibras Hijazi, Luigi Cavallo, Jorge Gascon
Summary: The synthesis of K-promoted Fe-Co bimetallic catalysts through a modified one pot sol-gel approach and their performance for the selective hydrogenation of CO2 to liquid hydrocarbons were reported. The high dispersion of K and Co on the catalysts was achieved, and both K and Co significantly influenced catalyst activity and selectivity. The addition of K increased the affinity of the catalyst towards the adsorbed species, while the presence of Co facilitated the spontaneous dissociation of H2. The optimized catalyst exhibited a C-5(+) space time yield of 15.8 mmol g(cat.)^(-1) h^(-1) with a C-5(+) selectivity of 51% at a CO2 conversion of 35%.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Lidan Deng, Xin Ai, Fengqiong Xie, Guilin Zhou
Summary: The addition of Cu to Ni catalysts significantly affects CO2 hydrogenation activity and CO selectivity, with the Ni/Cu ratios playing a crucial role. The reduction temperatures of the studied catalysts also influence the reaction, highlighting the importance of active species and their dispersion. The Ni1Cu1-400 catalyst shows promise as a superior catalyst for the reverse water-gas shift reaction, with high stability, CO selectivity, and fast formation rate at 400 degrees C.
CHEMISTRY-AN ASIAN JOURNAL
(2021)
Article
Chemistry, Physical
Guilin Zhou, Tao Li, Jiongyi Chen, Lidan Deng, Hongmei Xie
Summary: Different preparation methods of Nano-CeO2 supports were used to prepare nano-Pd/CeO2 catalysts, showing excellent catalytic performance in benzene hydrogenation and cyclohexane dehydrogenation reactions. The synergy between metal Pd, CeO2 support, and their structures effectively promotes hydrogen storage capacity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Jingjing Wang, Jun Chen, Lishan Peng, Haidong Zhang, Zhiquan Jiang, Kun Xiong, Qi Yang, Jia Chen, Na Yang
Summary: The study provides a new understanding of the active site of CuMnOx catalysts and suggests a new perspective in the development of effective and low-cost CuMnOx catalysts for heterogeneous catalytic oxidation reactions. The CuMnOx catalysts were found to consist of uniform CuO-Mn2O3 oxide pair structure, with highly isolated/dispersed CuO species anchored in the framework of Mn2O3. The speciation in these CuMnOx catalysts shifts from highly isolated or single Cu2+ oxide species to CuO nanoclusters and CuO microcrystalline with increasing Cu content.
APPLIED SURFACE SCIENCE
(2022)
Article
Environmental Sciences
Haoyu Wang, Hongmei Xie, Qihong Cao, Xiaole Li, Biyan Liu, Zuoxiang Gan, Huijun Zhang, Xue Gao, Guilin Zhou
Summary: Activated carbon adsorbents were prepared using waste Zanthoxylum bungeanum branches as raw materials and H3PO4/H2SO4 as composite activator. The adsorption properties for toluene in the air were evaluated, and it was found that the dosage of auxiliary activator H2SO4 significantly affected the adsorption performance of the activated carbon.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Physical
Yang Xiang, Kun Xiong, Linjian Yu, Haidong Zhang, Jia Chen, Meirong Xia
Summary: In this study, nickel telluride nanosheets with three different crystal phases were grown on Ni Foam through a one-step hydrothermal tellurization followed by annealing process. Among them, the non-stoichiometric Ni2.86Te2/NF exhibited superior electrocatalytic HER performance, providing valuable insights for the rational modulation of crystal phase on nickel telluride for catalyzing HER.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Energy & Fuels
Guilin Zhou, Xing Ai, Yunqi Tian, Rui Huang, Yongcheng Feng, Jianmin Ren
Summary: In this study, a Co/KIT-6 catalyst with high specific surface area and well-developed ordered mesoporous structure was prepared and characterized. The active metal Co species highly dispersed on the catalyst were identified as the main active centers for CO2 hydrogenation. The catalyst showed high activity and stability in CO2 hydrogenation, with over 47% CO2 conversion and selective generation of CO and CH4.
GREENHOUSE GASES-SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Guilin Zhou, Shiyu Xu, Yue Li, Qingqing Jiang, Benjing Xu, Hongmei Xie, Guizhi Zhang
Summary: A soft template method was used to introduce Ni component into CeO2 to prepare porous NiCe composite catalysts. The synergistic effect of Ni and Ce species significantly improved the reducibility of the catalysts and formed CO2 hydrogenation active sites. The structure and performance of the prepared NiCe composite catalysts were affected by the n(Ni)/n(Ce) ratio.
Article
Environmental Sciences
Jia Zeng, Hongmei Xie, Hanyi Zhang, Min Huang, Xuecheng Liu, Guilin Zhou, Yi Jiang
Summary: By fabricating alpha-MnO2 catalysts with abundant oxygen vacancies (OVs) via a novel redox-precipitation approach, the role of OVs in toluene oxidation has been clarified. The OVs induce new bandgap states, promote the formation of active oxygen species, and result in the elongation of Mn-O bonds. Therefore, the OVs have synergistic effects on the catalytic activity of the prepared catalysts.
Article
Chemistry, Applied
Xiaojie Li, Yuantao Tang, Jingjing Wang, Haidong Zhang, Kun Xiong, Jia Chen
Summary: A new ordered mesoporous carbon material with highly ordered carbon nano-channels was successfully synthesized using a novel mesoporous silica material as template agent. This material shows a 7 times faster adsorption rate and 3.2 times higher adsorption capacity for the removal of Cr(VI) in aqueous solution compared to a commercial activated carbon material.
JOURNAL OF POROUS MATERIALS
(2022)
Article
Chemistry, Physical
Qi Yang, Yuantao Tang, Haidong Zhang, Jun Chen, Zhiquan Jiang, Kun Xiong, Jingjing Wang, Xinai Liu, Na Yang, Qiuyue Du, Yuting Song
Summary: This study presents a new method for the synthesis of CuMnOx catalysts using a half carbonized citrus grandis peel assisted hard template method. The shift of the oxide pairs from CuO-Cu1.4Mn1.6O4 to Mn2O3- Cu1.4Mn1.6O4 has been achieved by tuning the Cu/Mn molar ratio, resulting in high selectivity and efficiency in the oxidation of benzyl alcohol using H2O2 as oxidant. The interaction between the Cu1.4Mn1.6O4 constituent and Mn2O3 constituent enhances the formation of Cu+ species, leading to a Fenton-like catalytic oxidation process.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Yuan Gao, Kun Xiong, Bingfeng Zhu
Summary: In this study, a series of Cu-based catalysts supported by MoOx were synthesized for noble metal-free RWGS reactions, and the effects of MoOx support on catalyst performance were investigated. The results show that the introduction of MoOx can effectively improve the catalytic performance of RWGS reactions.
Article
Chemistry, Multidisciplinary
Qiuyue Du, Haidong Zhang, Zhiquan Jiang, Kun Xiong, Qi Yang, Na Yang, Yuting Song, Jia Chen
Summary: As a metal-free material, graphitic carbon nitride (g-C3N4) finds widespread applications in catalytic and energy storage materials. However, limited light absorption, low conductivity, and high recombination rate of electron-hole pairs hinder its further development. To overcome these limitations, integrating g-C3N4 with carbon materials to construct composite materials is common and effective. This paper reviews the photoelectrocatalytic performance of carbon/g-C3N4 composite materials (CCNCS) that combine g-C3N4 with carbon dots, carbon nanotubes, graphene, and carbon spheres. The effects of carbon material types, content, nitrogen content, g-C3N4 morphology, and carbon-g-C3N4 interfacial interactions on the performance of CCNCS are analyzed, providing insights into the synergistic effect between g-C3N4 and carbon in CCNCS.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Kun Xiong, Jiayao Chen, Na Yang, Shangkun Jiang, Li Li, Zidong Wei
Summary: In this study, a series of transition-metal-doped carbon material catalysts were systematically investigated for electrochemical NRR under actual ambient conditions using DFT and AIMD simulations. The results showed high thermodynamic stability of the catalysts, with VN3C1 catalyst demonstrating the best performance in the presence of water. These findings suggest potential for artificial ammonia synthesis using single-atom catalysts under realistic conditions.
ACTA CHIMICA SINICA
(2021)
Article
Chemistry, Physical
Jia Zeng, Hongmei Xie, Zhao Liu, Xuecheng Liu, Guilin Zhou, Yi Jiang
Summary: This study demonstrates the tuning of oxygen vacancies on alpha-MnO2 for catalytic toluene oxidation, resulting in superior activity and stability. The control of oxygen vacancies weakens the Mn-O bond strength, increases the amount of surface adsorbed active oxygen species, and promotes catalytic activity.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Environmental
Guizhi Zhang, Bingman Lei, Shengming Chen, Hongmei Xie, Guilin Zhou
Summary: In this study, waste biomass was successfully used to prepare activated carbon adsorbents for toluene removal from air. The results showed that the activation temperature significantly influenced the structural characteristics and toluene adsorption performance of the adsorbents.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
