Article
Environmental Sciences
Zhaolu Feng, Xiaomin Chen, Xuefeng Bai
Summary: In this study, Pd/C catalysts were synthesized via Ar glow-discharge plasma reduction, with Pd/C-A showing the best catalytic activity due to its smallest palladium nanoparticles and highest dispersion.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Zhaolu Feng, Yindong Wang, Xuefeng Bai
Summary: This paper investigates the critical indicators of dehydrogenation reactions in hydrogen storage based on a liquid organic hydrogen carrier (LOHC) system, namely, speeding up the dehydrogenation rate and lowering the reaction temperature. By preparing Pd/SBA-15 catalysts and optimizing the reaction conditions, high dehydrogenation efficiency and catalytic stability were achieved.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Physical
Linsen Li, Xiang Gong, Zhuwei Yang, Riguang Zhang, Zhao Jiang, Tao Fang
Summary: Liquid organic hydrogen carriers (LOHCs) have advantages in hydrogen storage density and convenience of storage and transportation. This study used single-layer Ti3C2Tx MXene as a support to load Pt nanoparticles for the dehydrogenation reaction of 12H-NECZ. The 3 wt% Pt/S-Ti3C2Tx catalyst showed the best catalytic performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Ziting Liu, Zhaolu Feng, Xuefeng Bai
Summary: In this paper, Ni/MCM-41 catalyst was prepared by chemical reduction method, and Nin@Pd1/M41 core-shell nanocatalysts were prepared by ultrasound-assisted galvanic replacement method. The results showed that Nin@Pd1/M41 had electron transfer and SMSI effect, promoting its catalytic performance. The dehydrogenation efficiency of H12-NEC reached 100% at 180°C for 4 h and at 170°C for 6 h, and 97.58% for 6 h at 160°C, with a TOF of 5080.6 h-1, which was better than that reported in the literature. The excellent catalytic performance of Ni6@Pd1/M41 can mainly be attributed to the synergistic effect of coordination and strain effects between the bimetals.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Acoustics
Yanpeng Wu, Xiaoran Liu, Xuefeng Bai, Wei Wu
Summary: In this paper, Pd nanocrystalline catalysts were prepared by ultrasonic-assisted reduction method and applied in the dehydrogenation of 12H-NEC. The high temperature generated by cavitation during ultrasonic-assisted reduction decomposed CO32- in LDHs interlayer, promoting the formation of Pd nanoparticles. The catalyst exhibited excellent catalytic performance and stability.
ULTRASONICS SONOCHEMISTRY
(2022)
Article
Energy & Fuels
Jinjian Li, Fengya Tong, Yi Li, Xiaohui Liu, Yong Guo, Yanqin Wang
Summary: In this study, the dehydrogenation of 12H-NECZ over supported spinel catalysts in a continuous flow fixed bed reactor was investigated. Pd/MgAl2O4 catalyst showed the best performance due to the strong interaction between Pd and MgAl2O4, resulting in smaller Pd particles and more positively charged Pd species.
Article
Chemistry, Physical
Xiang Gong, Shuyi Guo, Zhao Jiang, Bolun Yang, Tao Fang
Summary: A series of Pd-M/Al2O3 bimetallic catalysts were successfully synthesized in this study, showing higher hydrogen release amount and NECZ selectivity by fine-tuning the alloy degree and nanoparticle size. The increase in NECZ selectivity mainly comes from the enhancement of the kinetic constant of the rate-limiting step.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Environmental
Wenjie Xue, Hongxia Liu, Baohua Mao, Honglei Liu, Minghuang Qiu, Chengguang Yang, Xinqing Chen, Yuhan Sun
Summary: Hydrogen, a promising candidate to replace fossil fuels, faces challenges in storage. A new reusable bimetallic Pd-Rh nanoparticles (NPs) catalyst shows potential for high-weight% hydrogen storage. The mechanism proposed for NEC hydrogenation over the Pd-Rh catalyst opens avenues for the development of LOHCs as energy vectors.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Jihyeon Lee, Byung Gwan Park, Kiheon Sung, Hyeongeon Lee, Jihun Kim, Eonu Nam, Jeong Woo Han, Kwangjin An
Summary: This study investigates the reversible hydrogenation and dehydrogenation processes in a liquid organic hydrogen carrier (LOHC) system using a single-catalyst approach. Key hydrogen-involved catalytic behaviors, such as adsorption and migration, play crucial roles in reactivity. The findings demonstrate that employing a defective metal oxide support can facilitate these behaviors at the active sites on the catalyst surface during the LOHC process.
Article
Engineering, Chemical
Xiaoxuan Li, Fei Wu, Wenhua Zhou, Chao Chen, Jianghao Wang, Bolong Li, Hao Chen, Jie Fu
Summary: In this study, a PdCoOx-based bimetallic oxide catalyst was prepared and applied for the low-temperature dehydrogenation of 12H-NECZ to produce H2. The activity of Pd was enhanced by introducing Co and the catalyst's electronic state was tuned based on the interfacial effect between PdCoOx and Zr-C3N4 supports. The PdCo bimetallic oxide formation improved the electronic transfer rate and the interaction between the support and PdCoOx, thereby enhancing the catalytic dehydrogenation activity.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Chemistry, Physical
Zhao Jiang, Xiang Gong, Shuyi Guo, Yanxin Bai, Tao Fang
Summary: A series of bimetallic Pd-M (M = Cu, Ni)/SiO2 catalysts were prepared and employed to enhance the catalytic activity and selectivity of NECZ for the 12H-NECZ dehydrogenation reaction. Pd3Ni1/SiO2 exhibited high catalytic performance with 100% conversion, 91.1% selectivity of NECZ, and 5.63 wt% hydrogen release amount. Adjusting the alloying degree or the alloy phase in the PdCu and PdNi bimetallic catalysts significantly enhanced the dehydrogenation activity and selectivity, providing theoretical guidance for designing efficient and low-cost bimetallic catalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Yindong Wang, Zhaolu Feng, Xuefeng Bai
Summary: A negatively charged silica surface (-Si-O-) was formed on SBA-15 by treating it with alkali, and ultrafine Pd nanoparticles (Pd NPs) were supported on SBA-15 via NaBH4 reduction. The as-prepared Pd/SBA15 catalyst exhibited excellent catalytic performance for dehydrogenation of H12-NEC. Characterization results revealed that Pd NPs were uniformly dispersed on the pore surface of SBA-15 with high Pd dispersion, and the coordination of Pd NPs with hydroxyl on the SBA-15 surface improved catalytic stability.
Article
Chemistry, Inorganic & Nuclear
Zhaolu Feng, Ziting Liu, Xuefeng Bai
Summary: In this study, Ni core-Pd shell nanoparticles supported on KIT-6 were prepared using Ni as a template and reductant by a galvanic replacement reaction under ultrasonic radiation. The characterization results showed that the Ni@Pd core-shell nanoparticles were uniformly dispersed on KIT-6 with an average diameter of 1.9+/-0.3 nm. The dehydrogenation efficiency of dodecahydro-N-ethylcarbazole on Ni@Pd(6:1)/K6 was higher than that of reported catalysts, which could be attributed to the synergistic effect of the ligand and strain effect, the high dispersion of core-shell nanoparticles, and the weak H2 binding ability of the catalyst.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Applied
Zhaolu Feng, Xuefeng Bai
Summary: Highly dispersed Pd/KIT-6 catalysts were prepared via inorganometallic chemical adsorption and sonochemical reduction, exhibiting excellent performance in the dehydrogenation of dodecahydro-N-ethylcarbazole with a high efficiency of 97.4% and maintaining above 95% efficiency after 10 cycles.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Bin Wang, Pei-ya Li, Shi-yuan Wang, Shu-han Lu, Tao Fang
Summary: The liquid organic hydrogen carrier (LOHC) technology shows great potential in hydrogen storage and delivery. N-ethylcarbazole (NEC) is a promising hydrogen storage carrier that can undergo reversible hydrogenation and dehydrogenation reactions. However, during the dehydrogenation reaction, side reactions involving C-N bond cleavage often occur. In this study, it was found that using a Pd catalyst supported on Mg-Al spinel can reduce side reactions, improve dehydrogenation activity and selectivity, and decrease the amount of noble metal Pd used. The improvement in catalyst activity is attributed to the smaller active metal particles and the valence distribution of Pd, while the reduction of C-N bond cleavage is related to the moderate acid site density of the catalyst, the synergy effect between metal and acid sites, and the weak adsorption capacity of dehydrogenation products.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
