Frontiers in Energy
·
2025
·
IF 6.2
Tang Wenbin,Xia Shuyue,Chou Haiwen,Zhao Jianan,Zhou Yi,Huang Qinghong,Yu Nengfei,Wu Yuping
The oxygen reduction reaction (ORR) plays a crucial role in key processes of fuel cells and zinc-air batteries. To enable commercialization, reducing the platinum (Pt) content and increasing the specific activity per unit mass is essential. A promising approach involves synthesizing of Fe-N-C precursors via the polyaniline (PANI) pathway, which ensures a uniform distribution of Fe-N-C species and facilitates the subsequent adsorption of platinum ions. This leads to the formation of Pt-Fe bimetallic alloys. The synergistic interaction between Pt and Fe-N-C sites promotes the homogeneous dispersion of Pt and the formation of smaller particle sizes, which in turn enhances intrinsic activity and stability of the catalyst. Notably, the Pt/Fe-N-C catalyst, featuring an ultra-low Pt loading of just 1.79 wt%, exhibits a remarkable doubling of mass activity compared to conventional catalysts. Moreover, zinc-air batteries using this catalyst achieve an impressive peak power density of 200 mW/cm 2 .
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Jiaming Cui,Xiaoting Cao,Xi Wang,Jie Liu,Ningyi Yuan,Jianning Ding
The strategic development of high-efficiency electrocatalysts for the oxygen reduction reaction (ORR) remains a pivotal challenge in advancing high-performance zinc-air batteries (ZABs) towards commercial viability. In this work, we developed a template-directed synthesis of Co, N-co-doped polyhedral carbon 3D frameworks (Co-N-C-x) through controlled pyrolysis of Co-ZIF precursors grown on Co-ZnO nanorod self-template. Owing to its unique carbon skeleton architecture and uniform dispersion of Co and N species, the optimized catalyst (Co-N-C-7%) exhibits enhanced ion/electron-transfer kinetics, improved mass transport capabilities. Consequently, the Co-N-C-7% catalyst exhibits superior ORR performance, achieving a half-wave potential (E1/2 = 0.878 V vs. RHE) that is 3 mV higher than commercial 20 wt% Pt/C (E1/2 = 0.875 V vs. RHE), along with exceptional stability. When applied in ZABs, the Co-N-C-7% cathode delivers a higher peak power density (178 mW cm-2) compared to Pt/C-based counterparts (152 mW cm-2). This work provides a simple and reliable control scheme for designing cost-effective, high-performance, and durable ORR electrocatalysts.
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高影响因子
RARE METALS
·
2025
·
IF 11
Zhou Luo-Ting,Zhang Qian-Qian,Yuan Hua-Dong,Fang Ru-Yi,Luo Jian-Min,Huang Hui,Gan Yong-Ping,Xia Yang,Zhang Jun,Xia Xin-Hui,He Xin-Ping,Jin Cheng-Bin,Zhang Wen-Kui
Lithium (Li) metal anodes (LMAs) that employ three-dimensional lithiophilic frameworks are among the most promising options for constructing high-energy-density rechargeable batteries. Herein, hollow ZnS nanosheets with the coating of N-doped carbon are modified on the surface of carbon cloth (NCHZS@CC) to serve as the host material for Li metal. It is revealed that the high surface area of NCHZS@CC can significantly reduce local current density and mitigate volume change during cycling. More importantly, the lithiated product of ZnS, confined within the carbon cage, facilitates the uniform deposition of Li metal on carbon fibers and promotes the formation of a stable solid electrolyte interphase enriched with Li 2 S, thereby improving long-term performance as the cycling progresses. Consequently, the LMAs based on NCHZS@CC demonstrate an impressive cycle life beyond 560 h with an ultralow overpotential of 38 mV at a current density of 5 mA cm −2 with a capacity of 1 mAh cm −2 in the symmetric cell. In addition, when matched with a high mass loading cathode of LiFePO 4 (11.5 mg cm −2 ), the assembled full cell displays outstanding performance, achieving 900 cycles at a rate of 2C. Graphical abstract
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TRANSACTIONS OF TIANJIN UNIVERSITY
·
2025
·
IF 8.5
Jia Ke,Zhang Yanan,Zuo Rui,Lu Hongbing,Ji Kemeng,Chen Mingming
The sluggish bidirectional conversion rate between Li 2 S n (2 ≤ n ≤ 4) and Li 2 S, coupled with the uncontrolled deposition of Li 2 S, significantly impedes the realization of high-performance lithium–sulfur batteries (LSBs). In this study, a metal–organic framework was employed as a precursor for the synthesis of a CoO x –CeO 2− y /C (0 < x < 3/2, 0 < y < 1/2) heterojunction via pyrolysis, which was subsequently introduced onto the cathode side of the polypropylene (PP) separator in LSBs. The modification of CoO x –CeO 2− y /C enhances the kinetics of converting of Li 2 S n to Li 2 S during the discharge process. The Tafel slope for the Li 2 S deposition reaction is reduced to 52.1 mV/dec, representing a 56.6% decrease compared to LSBs with bare PP separator. Conversely, during the charging process, the modification lowers the energy barrier for the Li 2 S decomposition reaction, with the activation energy reduced to 6.12 kJ/mol, indicating a 70.3% decrease relative to LSBs with PP separator only. Consequently, more Li 2 S is promoted to undergo decomposition. The CoO x –CeO 2− y /C heterojunction facilitates uniform deposition of Li 2 S, featuring fine particles and a uniform distribution, after brief potentiostatic charging for decomposition, thereby effectively mitigating the deactivation of sulfur species. Thanks to the enhanced bidirectional conversion of lithium polysulfides (LiPS) facilitated by the CoO x –CeO 2− y /C modification layer, the (−)Li|CoO x –CeO 2− y /C@PP|S(+) coin cell maintains a Coulombic efficiency of 90.4% after 500 cycles at a current density of 1 C, exhibiting a low capacity-decay rate of only 0.081% per cycle, thereby demonstrating excellent long-cycle stability.
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DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY
·
2018
·
IF 2.913
Liangliang Mu,Xiaoxue Yin,Yanhui Xiao,Xia Bian,Yanjian Yang,Liting Wu,Jianmin Ye
Collectins, a subfamily of the C-type lectins, are able to bind non-self glycoconjugates on the surface of microorganisms and inhibit infection by direct neutralization, agglutination and/or opsonization , which play important roles in innate immunity . In this study, a CL11X1-like collectin (OnCL11X1) was identified from Nile tilapia ( Oreochromis niloticus ) and characterized at expression and agglutination functional levels. The open reading frame of OnCL11X1 is 840 bp of nucleotide sequence encoding polypeptides of 279 amino acids . The deduced amino acid sequence is highly homology to teleost and similar to mammalian CL11X1, containing a canonical collagen-like region, a carbohydrate recognition domain and a neck region. Expression analysis revealed that the OnCL11X1 was highly expressed in the liver, and widely exhibited in other tissues including kidney, intestines and spleen. In addition, the OnCL11X1 expression was significantly up-regulated in spleen and anterior kidney following challenges with a Gram-positive bacterial pathogen ( Streptococcus agalactiae ) and a Gram-negative bacterial pathogen ( Aeromonas hydrophila ). The up-regulation of OnCL11X1 expression was also demonstrated in hepatocytes and macrophages in vitro stimulation with S. agalactiae and A. hydrophila . Recombinant OnCL11X1 protein was able to agglutinate both S. agalactiae and A. hydrophila in vitro and promote the phagocytosis by macrophages. Taken together, the results of this study indicated that OnCL11X1, possessing apparent agglutination and opsonization ability to bacterial pathogens, might be involved in host defense against bacterial infection in Nile tilapia.
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Zhaoxu Li,Xinyi Luo,Meifang Luo,Yuan Qin,Chaozhong Guo,Yao Liu,Zhongli Luo
To design inexpensive carbon catalysts and enhance their oxygen reduction reaction (ORR) activity is critical for developing efficient energy-conversion systems. In this work, a novel Fe-N-C hybrid electrocatalyst with carbon nanolayers-encapsulated Fe 3 O 4 nanoparticles is synthesized successfully by utilizing the molecular-level confinement of graphitic C 3 N 4 structures via hemin biomaterial. Benefiting from the Fe-N structure prevalent on the carbon nanosheets and large mesopore-dominated specific surface area, the synthesized catalyst under optimized conditions shows excellent electrocatalytic performance for ORR with an E ORR at 1.08 V versus reversible hydrogen electrode (RHE) and an E 1/2 at 0.87 V vs. RHE, and outstanding long-term stability, which is superior to commercial Pt/C catalysts (E ORR at 1.04 V versus RHE and E 1/2 at 0.84 V versus RHE). Moreover, the low hydrogen peroxide yield (<11%) and average electron transfer number (~3.8) indicate a four-electron ORR pathway. Besides, the maximum power density of the home-made Zn-air battery using the obtained catalyst is 97.6 mW cm −2 . This work provides a practical route for the synthesis of cheap and efficient ORR electrocatalysts in metal-air battery systems.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2015
·Vol. 40
·期 2
·1454-1459
·
IF 3.086
Limei Zhou,Mengyun Yin,Xiaohui Jiang,Qiang Huang,Wencheng Lang
1,3-Diamino-graphene (NH2-G-NH2) materials were synthesized using a simple chemical method. The as-prepared materials were characterized using FT-IR, TG, XRD, XPS, and SEM measurements. The results revealed that a 1,3-diamino group was successfully grafted on graphene and could immobilize CuI by coordination interactions. The NH2-G-NH2 materials can be used as heterogeneous ligands for CuI-catalyzed C–N coupling reactions, and the desired products were obtained with good yields. The reaction system is much smoother at lower temperature compared with others previously reported. Additionally, the new method can easily realize the purification of products and recycling of catalysts.
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高影响因子
BIOSENSORS & BIOELECTRONICS
·
2022
·
IF 12.545
Min Feng,Qian Zhang,Xiaofang Chen,Die Deng,Xiaoyi Xie,Xiupei Yang
Single-atom catalysts with atomically dispersed M-Nx active sites have been widely used as nanozymes for colorimetric sensing due to their similar structure to natural enzymes , but they are still limited by their biological activity. Herein, controllable synthesis of B-doped Zn–N–C (ZnBNC) single-atom nanozymes (SAzymes) was designed and realized for the first time as a potent peroxidase mimetic. Based on the peroxidase-like activity of ZnBNC SAzymes, a novel colorimetric method was developed for the highly sensitive and selective detection of p-phenylenediamine (PPD) with a wide response range (0.3–10 μM) and a low detection limit (0.1 μM), which can be used as an alternative method for the detection of PPD in hair dyes and dyed hair samples.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Shuang Liang,Guozhe Sui,Jinlong Li,Dongxuan Guo,Ze Luo,Rongping Xu,Hong Yao,Chao Wang,Shijie Chen
This study presents a novel approach for synthesizing C–ZnO/CdS graded nanorods derived from metal–organic frameworks (MOFs) that can be applied as a catalyst for photocatalytic hydrogen evolution from pure water. Porous C-doped ZnO was prepared by a self-template method using imidazole-like metal–organic backbone (ZIF-L) as a precursor through a two-step calcination method. CdS nanoparticles were deposited on ZIF-L surface by chemical deposition . The two-step calcination method introduced elemental C, and the unique architecture of ZIF-L played an essential role in forming the hierarchical structure of the porous ZnO nanorods. Compared with other ZnO/CdS catalysts, the C-doped ZnO/CdS graded nanorods exhibited remarkable photocatalytic activity for hydrogen production . The highest hydrogen production rate of 20.25 mmol g −1 h −1 with an apparent quantum yield (AQY) of 24.7% at 365 nm obtained over C–ZnO/CdS with Pt as co-catalyst, which was 24.4 and 65.3 times higher than that over CdS (0.83 mmol g −1 h −1 ) and ZnO (0.31 mmol g −1 h −1 ), respectively. This outcome was attributed to (i) the formation of Z-scheme heterojunction that significantly promoted the separation and migration of photogenerated electron–hole pairs; (ii) C doping that reduced the bandgap of ZnO and broadened its spectral response range; and (iii) the ordered arrangement of porous nanorods that effectively reduced the recombination rate of the electron–hole pairs.
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高影响因子
CATALYSIS LETTERS
·
2019
·Vol. 150
·期 1
·178-184
·
IF 2.372
Li Zhi-Xin,Wei Xian-Yong,Yang Zheng,Zhang Min,Meng Xing-Long,Niu Shuo,Zhang Di,Zong Zhi-Min
Abstract Highly selective hydrogenation of furfural to furan-2-ylmethanol (FM) in isopropanol was achieved over a novel magnetic Cu–Co/C derived from zeolitic imidazolate frameworks prepared by galvanic replacement reaction. Furfural conversion and FM selectivity (FMS) are 100% and 97.2%, respectively, at 200 °C. FMS was held around 95% after 5-times recycle of the Cu–Co/C. In addition, cinnamaldehyde was completely converted with 96.8% of phenylpropanol selectivity over the Cu–Co/C at 150 °C. Graphic Abstract
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高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 44
·25268-25273
·
IF 10.733
Jun Han,Kunjie Zhu,Pei Liu,Yuchang Si,Yujun Chai,Lifang Jiao
Herein, the preparation of CoSb nanoparticles embedded in carbon nanofibers with a raised surface (N-doped CoSb@C nanofibers) via the electrospinning method is reported for the first time. The distinct structure facilitates the pseudocapacitive behaviors, which is the key to obtain fast kinetics and long cyclability. N and Co elements can not only optimize the electronic configuration but also buffer the volume changes of the material during cycling. For potassium-ion batteries, the capacity maintains 250 mA h g−1 after 500 cycles at 1 A g−1, and for sodium-ion batteries, the capacity keeps 413 mA h g−1 after 1000 cycles at 1 A g−1. Thus, this work makes a great contribution towards exploring high-capacity anodes for practical potassium-ion batteries and sodium-ion batteries.
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2021
·Vol. 22
·期 11
·5680
·
IF 5.924
Long Tang,Jianchun Jiang,Guoqiang Song,Yajing Wang,Ziheng Zhuang,Ying Tan,Yan Xia,Xianfeng Huang,Xiaoqing Feng
Urolithins (hydroxylated 6H-benzo[c]chromen-6-ones) are the main bioavailable metabolites of ellagic acid (EA), which was shown to be a cognitive enhancer in the treatment of neurodegenerative diseases. As part of this research, a series of alkoxylated 6H-benzo[c]chromen-6-one derivatives were designed and synthesized. Furthermore, their biological activities were evaluated as potential PDE2 inhibitors, and the alkoxylated 6H-benzo[c]chromen-6-one derivative1fwas found to have the optimal inhibitory potential (IC50: 3.67 ± 0.47 μM). It also exhibited comparable activity in comparison to that of BAY 60-7550 in vitro cell level studies.Keywords:alkoxylated 6H-benzo[c]chromen-6-one;phosphodiesterase II;inhibitors;biological activities
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高影响因子
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