Article
Chemistry, Physical
Shuxiao Wang, Yibo Sun, Rui Shan, Jing Gu, Taoli Huhe, Xiang Ling, Haoran Yuan, Yong Chen
Summary: The aim of this study is to efficiently produce hydrogen-rich syngas. The thermal conversion experiment of polypropylene was carried out using a two-stage pyrolytic-catalytic device. A new activated carbon based catalyst was developed, and the catalytic performance of monomial and bimetallic catalysts was explored. The method of hydrogen production from waste plastic cracking in this paper will provide new ideas for high value utilization of plastic and hydrogen production.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Applied
J. M. Fernandez-Morales, L. Martinez-Quintana, A. B. Dongil, E. Asedegbega, E. Castillejos, I. Rodriguez-Ramos, A. Guerrero-Ruiz
Summary: In this study, the conversion of 1-butene was investigated over Mo carbides and Ni, Co and Mo phosphides as catalysts, using a 1-butene/helium mixture in a molar ratio of 4:1. The conversion rate ranged from 30-44% and was relatively stable, except for certain catalysts. The main reaction observed was isomerization of 1-butene, with higher selectivity towards dimerization on certain catalysts.
Article
Environmental Sciences
Hang Dong, Meng Liu, XiangZhe Yan, ZeHao Qian, Yu Xie, Wei Luo, Can Lei, Zhi Zhou
Summary: The metal catalyst X-Mo@MgO (X = Ni, Fe, Co) was studied as an excellent catalyst for converting biomass and plastics into functional carbon nanocomposites. By exploring the reaction mechanism and bactericidal performance, it was found that the addition of Mo increased the H2 gas yield and the NiMo@MgO catalyst produced higher quality MWCNTs.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Inorganic & Nuclear
Bihao Hu, Yuxin Xie, Ying Yang, Jiazhi Meng, Jinliang Cai, Changguo Chen, Danmei Yu, Xiaoyuan Zhou
Summary: Researchers successfully fabricated a novel tensile lattice strained Ni@NiCu catalyst with a popcorn-like morphology, showing excellent catalytic activity, selectivity, and stability in borohydride electrooxidation. Moreover, using a Ni@NiCu anode, a direct borohydride fuel cell (DBFC) achieved a power density of 433 mW cm(-2) and an open circuit voltage of 1.94 V, surpassing the performance of DBFCs with other reported anode catalysts. This improvement can be attributed to the introduction of Cu generating tensile lattice strain, leading to an increase in the d-band center of Ni metal and promoting the rate-determining step of B-H decoupling in borohydride oxidation.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Shuai Chang, Wei Na, Jiaqi Zhang, Lina Lin, Wengui Gao
Summary: This study investigates the process and mechanism of CO2 conversion to methane. By altering the Zr/Al ratio in Ni catalysts, high CO2 conversion rates and CH4 selectivity can be achieved. Characterization techniques reveal the physicochemical properties and reaction mechanism of the catalysts.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Physical
Weiqiao Huang, Changgeng Wei, Yi Li, Yongfan Zhang, Wei Lin
Summary: This study investigates the mechanism and coke-resistance ability of the Ni-Mo catalyst in dry reforming of methane (DRM) by using Mo-doped Ni and MoOx adsorbed Ni surfaces. The electron donor effect of Mo inhibits the carbonization of Ni, while the strong interaction between Mo and O promotes the formation of MoOx species. The presence of Mo-O species enhances the carbon oxidation reaction.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Energy & Fuels
Yanli Huang, Xiaodong Li, Qian Zhang, Vladimir A. Vinokurov, Wei Huang
Summary: The study revealed that the stability of catalyst declines rapidly at elevated reaction pressure, with differences in the sources and types of carbon deposition between atmospheric pressure and pressurized conditions. Carbon nanotubes were produced by CH4 decomposition reaction and CO disproportionation reaction at atmospheric pressure, while at high pressure, filamentous carbon was formed regardless of the reaction temperature, and accompanied by encapsulated graphitic carbon.
Article
Engineering, Chemical
Xingbo Wang, Deng Hu, Yingdong Hao, Lina Zhang, Nannan Sun, Wei Wei
Summary: Massive CO2 emission contributes greatly to global warming, and carbon capture, utilization and storage (CCUS) has been proposed as an essential option for carbon reduction. The integrated carbon capture and conversion (ICCC) approach, using efficient dual-functional materials (DFMs), has shown potential for reducing CCUS costs. In this study, Ni-MgO-Al2O3 DFMs were prepared by calcination of Ni-impregnated Mg-Al layered double hydroxide (MgAl-LDH), and achieved excellent ICCC performance with high selectivity for converting captured CO2 to CH4. This work provides a pathway for practical implementation of ICCC technology and inspires other integration approaches for CO2 capture and mitigation technologies.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Liliana P. L. Goncalves, Maria Meledina, Alexander Meledin, Dmitri Y. Petrovykh, Juliana P. S. Sousa, O. Salome G. P. Soares, Yury Kolen'ko, M. Fernando R. Pereira
Summary: N-doping is crucial for enhancing the catalytic performance of carbon nanotube-supported Ni catalysts for CO2 methanation. The N-doping improves the dispersion of Ni on the CNT support, leading to higher CO2 conversion and methane selectivity.
Article
Chemistry, Applied
Arina R. Potylitsyna, Yury Bauman, Ilya Mishakov, Pavel E. Plyusnin, Aleksey A. Vedyagin, Yury Shubin
Summary: Self-organizing catalytic systems show promise in synthesizing carbon nanomaterials. The addition of molybdenum improves the catalytic performance of nickel, leading to a shorter induction period and higher carbon yield. The bimetallic 96Ni-4Mo alloy outperforms the monometallic 100Ni catalyst.
TOPICS IN CATALYSIS
(2023)
Article
Energy & Fuels
Limo He, Xiaofei Yin, Chong Tao, Xuechen Zhou, Jiahang Li, Zhe Xiong, Yuxing Tong, Song Hu, Sheng Su, Yi Wang, Jun Xiang
Summary: New catalysts of Ni-Fe loading Ni foam (Ni-Fe/NF) show great potential in catalytic reforming of pyrrole for the co-production of H2 and CNTs@Ni foam electrode materials. The catalytic activity of Ni-Fe/NF increases and then decreases with the increase of Fe/Ni ratio, reaching the maximum at N1F2/NF (Fe/Ni ratio is 2). The H2 yield over N1F2/NF is 20 times larger than that over Ni/NF and Fe/NF. The prepared CNTs@Ni foam materials exhibit excellent electrochemical performance and have promising application potential in supercapacitors.
Article
Energy & Fuels
Shahla Karimi, Fereshteh Meshkani, Mehran Rezaei, Ali Rastegarpanah
Summary: Supported Ni catalysts on magnesium silicate were synthesized via co-precipitation using urea. Factors such as urea decomposition time, concentration, calcination temperature, and surfactant type significantly influenced the surface properties and catalytic performance. Optimal performance was observed at urea decomposition time of 24 h, urea concentration of 0.5 M, and calcination temperature of 700 degrees C for the Ni/SiO2 dot MgO catalyst with good thermal stability and decreased surface area.
Article
Chemistry, Applied
Muhammad Masood Khan, Lijun Jin, Muhammad Mahmood Khan, Yang Li, Hammad Saulat, Yun Zhang, Muhammad Sarfraz, Jialong Zhu, Haoquan Hu
Summary: The addition of activated carbon to Ni/MgO-Al2O3 catalyst improved textural properties, increased surface area and pore volume, and decreased the size of metal Ni. The 10% activated carbon loading in 10AC-Ni/MgO-Al2O3 exhibited the best catalytic activity and stability.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Chemistry, Physical
N. V. Ruban, D. I. Potemkin, V. N. Rogozhnikov, K. I. Shefer, P. V. Snytnikov, V. A. Sobyanin
Summary: The catalysts prepared exhibited excellent performance in the auto-thermal reforming of isooctane, but carbon formation was observed in the presence of Rh-Ni-containing catalyst during the ATR of isooctane-o-xylene blend. Rh-containing catalyst showed good activity and stability even in the case of isooctane-o-xylene-naphthalene blend.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Yu Fu, Wenbo Kong, Bingrong Pan, Changkun Yuan, Shuqing Li, He Zhu, Jun Zhang
Summary: In this study, the dry reforming of methane was investigated using catalysts modified by different amounts of B2O3. The results showed that the introduction of a small amount of B2O3 significantly improved the catalyst's activity, stability, and carbon resistance.
JOURNAL OF THE ENERGY INSTITUTE
(2022)
