Inorganic Chemistry Frontiers
·
2025
·
IF 6.4
Chongxi Zhang,Fengting Li,Dong Wu,Qingmeng Guo,Zhanning Liu,Zhikun Wang,Zixi Kang,Lili Fan,Daofeng Sun
Integration of cobalt phosphides (Co2P and CoP) in a carbon matrix shows great promise for developing high-performance catalysts for water electrolysis. Nevertheless, the controlled synthesis of these two phases with an effective interface, uniform dispersion, and a simplified synthesis process is still challenging. Herein, we proposed a strategy that involves pre-construction of the Co/CoO@C heterostructure followed by post-conversion by phosphorization to achieve the precise synthesis of the Co2P/CoP@C heterostructure, which was realized by utilizing a MOF as the self-sacrificial template. The oxygen-coordinated MOF that shows advantages in building the Co/CoO heterostructure was employed in this work and grown into a high-quality membrane via cathodic electrodeposition on the graphite substrate (Gss). The obtained catalyst (Gss-Co2P/CoP@C-800) requires 146 and 365 mV overpotentials to achieve a current density of 100 mA cm−2 for the HER and OER, respectively, and 1.54 V to achieve a current density of 10 mA cm−2 for water electrolysis. Beyond the significantly enhanced conductivity that originates from the robust interaction between the MOF and Gss, the establishment of an effective Co2P/CoP interface also plays a pivotal role in contributing to the high performance of Gss-Co2P/CoP@C-800. As revealed by density functional theory (DFT) calculations, the unique d-orbital electron distribution of Co2P/CoP and the enhanced state density near the Fermi level facilitate its efficient electron transport and render the Co2P/CoP heterostructure region a crucial active site for water electrolysis. This study will provide new insights into the rational design and construction of heterostructures based on MOFs for efficient and green energy conversions.
研究领域:
材料科学
·
电化学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Cong Wang,Jieying Xiu,Kunxi Lü,Yafeng Li,Mingdeng Wei
Na super-ion conductor type material Na 3 V 2 (PO 4 ) 3 has been widely researched as the cathode of sodium-ion batteries (SIBs) in recent years, but the unsatisfying cost of Na 3 V 2 (PO 4 ) 3 impedes its wide application in SIBs. In this study, iron element is used to replace part of vanadium in Na 3 V 2 (PO 4 ) 3 to reduce its expense, and pine pollen is applied for the first time as a very effective carbon source to improve the performance of Na 4 FeV(PO 4 ) 3 . The fabricated composite material achieves a capacity of 105 mA h g −1 under 0.2 C and fascinating cycling stability over 94 % under 2 C for 500 cycles and 98 % under 10 C for 1000 cycles. The excellent cycle performance is caused by the involvement of pine pollen that acts as a carbon matrix to enhance the electron conductivity and block the agglomeration of active material effectively, thus the well-dispersed nano sized Na 4 FeV(PO 4 ) 3 shortens the diffusion path of sodium ion and gains a remarkable rate capability. Moreover, the distinguished reversibility during the charge and discharge procedures is ascribed also to the robust structure of Na 4 FeV(PO 4 ) 3 . This work provides an efficient route to realize the economic cathode material of SIBs with good performance.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
IONICS
·
2022
·Vol. 28
·期 3
·1473-1481
·
IF 2.961
Huang Xiaona,Ren Yaqi,Long Jianping,Lin Jinhui,Zhou Zheng
The interface between carbon matrix and sulfur (S) is critically essential for the exhaustive conversion of S to lithium sulfide (Li 2 S). However, the struggling diffusion of lithium (Li) ions on the surface of carbon allows severe polarization of Li ions and shuttling of polysulfides. Herein, we demonstrate an effective strategy via decreasing the diffusion barrier of Li ions on the conductive carbon matrix surface via embedding Fe and N atoms within the carbon matrix. As combined with 80% sulfur content, the proposed interfaces exhibit an excellent increment in both of specific capacity and stability cycles. The promoted mechanism at the proposed interface is clearly evaluated by density functional theory (DFT) calculation, cyclic voltammograms (CV) curve, and AC impedance. This research offers a novel inspires to design fast conversion of high content S cathode via promoting the Li-ion diffusion within the cathode.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Chemistry-An Asian Journal
·
2022
·Vol. 17
·期 10
·e202200191
·
IF 4.839
Yuan Gao,Yang Ling,Yan Peng,Shiyou Guan
Graphical We fabricated a novel single-phase nanotube structure with uniform distribution of nanoscale SiOx units and amorphous carbon matrix. The hollow nanotube and homogeneously distributed ultrafine SiOx units greatly alleviate volume changes. When employed as an anode of LIBs, the SiOx/C NTs electrode displays excellent long−Cycle stability and rate capability. SiOx is an attractive anode material for lithium-ion batteries due to its considerable capacity. However, its obvious volume expansion and low conductivity result in poor electrochemical performance. Herein, a novel single-phase nanotube structure with uniform distribution of nanoscale SiOx units and amorphous carbon matrix was fabricated. The hollow nanotube and homogeneously distributed ultrafine SiOx units greatly alleviate volume changes. The amorphous carbon facilitates electron transport throughout the network and offers a buffer to further reduce the volume expansion of SiOx. Benefiting from this unique structure, as-prepared single-phase SiOx/C NTs demonstrate excellent durability and rate capability. Specifically, it delivers a high reversible specific capacity (713 mAh g −1 at 0.1 A g −1 after 200 cycles); negligible capacity decay is confirmed after 500 cycles at high density current (544 mAh g −1 at 1 A g −1 after 500 cycles).
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Yaqing Wei,Xuhao Liu,Runzhe Yao,Jiayao Qian,Yiyi Yin,De Li,Yong Chen
The alloying type materials have been proposed to be served as the alternative anode for lithium ion batteries (LIBs) owing to their much higher capacity than graphite. However, those elementary alloying substances still suffer large volume expansion, resulting in much Li-irreversibility of low initial coulombic efficiency (ICE<75%) and fast capacity fading. Herein, inspired by the high entropy concept, we extend the simple elements into the high entropy alloy (HEA) system by rational designing Li-active and high conductive components. Interestingly, one kind atomic disorder HEA composed of Ge-Sn-Sb-Si-Fe-Cu-P is successfully synthesized for the first time, which is surprisingly found delivered ultra-high reversibility (e.g. ICE=91%) for LIBs, combining with suitable plateau (∼0.5 V) and large discharge capacity (1448 mAh/g) as well. Furthermore, such formed HEA nanoparticles are greatly emdedded and encapsulated into carbon matrix to form a dragon-fruit-like HEA/C composite. Benefitted from above unique structural design, the HEA/C composite exhibits superior cyclability (>1600 h operation) and excellent rate performances (787 mAh/g and 63% retention at 2000 mA/g). This successful implement of high entropy concept into alloying type anode materials may open a new avenue to developing series high entropy alloys toward advanced energy storage.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Carbon Neutralization
·
2025
·Vol. 4
·期 3
·e70013
·
IF 12
Zihua Li,Yao Lu,Mengmeng Liu,Di Xiao,Kehua Dai,Jiangtao Xu,Guangfu Liao,Chunju Li
Molybdenum dioxide (MoO 2 ) is a hopeful anode material for high-performing lithium-ion batteries (LIBs), but the practical application is still impeded due to its huge volume variation and degraded capacity upon the cycling process. Herein, we present a reasonable design and synthesis of amorphous carbon matrix-confined MoO 2 yolk–shell microspheres (MoO 2 /C-YSMs) by a simple solvothermal strategy and in situ carbonizing process. This unique carbon-restrained yolk–shell architecture can not only shorten Li + ion/electron transfer pathways, but also relieve the large volume change of anode materials and further improve battery performance. Profit from steady yolk–shell structure and conductive carbon matrix, the obtained MoO 2 /C-YSMs electrode demonstrates a high reversible specific capacity of 1034 mA h g –1 at 100 mA g −1 and 504 mA h g −1 at 2000 mA g −1 with good rate capability and long cycle performance. The study demonstrates a facile, feasible, and low-cost method to prepare high-performing electrodes via structural design, which reveals the potential of MoO 2 /C-YSMs for using high-performance anode material for LIBs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 115
·114790-114799
·
IF 3.289
Shuang Liao,Gongzheng Yang,Chengxin Wang
Sodium-ion batteries (SIBs) have drawn growing interest as alternative energy-storage devices for lithium ion batteries owing to sodium's natural abundance, low cost and environmental benignity. To date, exploitation of suitable anode materials with high capacities and fast sodium ion uptake/removal for SIBs is still a great challenge. Herein, a sea-island-like SbNPs@C nanocomposite composed of Sb nanoparticles (NPs) uniformly embedded in a carbon matrix was synthesized via a facile, low cost, and high yield hydrothermal method followed by an annealing process. When used as anode materials for SIBs, the as-obtained SbNPs@C nanocomposite electrodes exhibited superior electrochemical performances (a high reversible capacity of 622 mA h g−1, 91% capacity retention over 110 cycles at 100 mA g−1 and a good rate capability of 444 mA h g−1 at 1000 mA g−1) and offered a good choice for advanced SIB anode materials.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xiaoqing Liu,Ze Xu,Jinjiang Wu,Kexin Wang,Chuang Yu
Vanadium dioxide (VO 2 ) materials exhibit significant theoretical specific capacity, which is ascribed to multi-electron transfer reactions and unique tunneled structures. However, the low electronic conductivity and sluggish reaction kinetics of VO 2 have impeded its further development. Hence, in this study, we employed a synergistic strategy of defect engineering and compositing with a calabash carbon matrix to reduce Zn 2+ diffusion barriers and accelerate electron transfer. The VO 2 cathode provided a high specific capacity at a low rate of 303 mA h g −1 at 0.1 A g −1 after 191 cycles, along with good rate performance (168 mA h g −1 at 10 A g −1 ) and satisfactory long-term stability (170 mA h g −1 at 1 A g −1 after 1100 cycles). The exhaustive structural analyses indicated that oxygen vacancies accelerated the Zn 2+ diffusion rate, while a uniform calabash-like hollow carbon matrix improved electronic conductivity during cycling. Moreover, ex-situ measurements demonstrated that during discharge, the composite cathode transformed to layered Zn 3+ x (OH) 2 V 2 O 7 ·2H 2 O, which then facilitated the subsequent intercalation of Zn 2+ . This cooperative strategy advances the practical application of aqueous zinc ion batteries by leveraging vanadium-based electrodes.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2020
·Vol. 13
·期 2
·1213-1219
·
IF 6.895
Lu Meng,Ling Zhang,Yihua Zhu,Hongliang Jiang,Yusuf Valentino Kaneti,Jongbeom Na,Yusuke Yamauchi,Dmitri Golberg,Hao Jiang,Chunzhong Li
Restricting the aggregation and rationally adjusting the electronic structure of binary metal centers in metal–organic framework (MOF) precursors are important for optimizing their performance as electrocatalysts for the oxygen evolution reaction (OER) and achieving low overpotential and high stability in such applications. Herein, we demonstrate the possibility of enhancing the electrochemical activity of MOF-derived binary metal center catalysts by controlling the form of the Fe species. The introduction of Fe-SBU (iron 2,5-dihydroxyterephthalic acid) into ZIF-67 is found to induce a distinct confinement effect and this can be exploited to improve the electroconductivity of binary metal center catalysts, and therefore, to reduce the OER reaction barrier (OOH* → O*). When applied as an OER catalyst in 1 M KOH solution, the Fe-SBU@Co-Matrix catalyst exhibits a low overpotential of 249 mV to reach a current density of 10 mA cm−2 and high stability for over 40 h. This work describes the secondary growth treatment of MOF-derived porous carbons to promote their application as catalysts in energy conversion reactions.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2019
·
IF 4.63
Yihu Dai,Chunyang Jiang,Min Xu,Bo Bian,Di Lu,Yanhui Yang
Anilines as important intermediates for both organic synthesis and industrial manufactory are densely substituted with a variety of functional moieties, and the transformation of nitroarenes into corresponding anilines requires catalytically selective hydrogenation catalyst. Herein, we describe a simple pyrolysis strategy to prepare cobalt catalysts in nitrogen-doped carbon matrix applied in the selective hydrogenation of nitroarenes with molecular hydrogen. The Co/NC catalysts are obtained through thermal treatment of mixed precursors of cobalt phthalocyanine and melamine . The surface-modified Co particles with Co 3 O 4 and CoN x sites are surrounded by N-doped carbon layers according to a series of structural characterization results. These Co/NC catalysts are capable of efficiently selective hydrogenation of nitrobenzene and various substituted nitroarenes into corresponding anilines under relatively mild reaction conditions. The optimal catalytic hydrogenation performance is contributed to the fast rate of H 2 dissociated activation on the CoN x active sites and the facile adsorption of the reactant substances, which is verified by the isotopic H 2 -D 2 exchange experiments, reactant adsorption and the ORR reaction tests. Furthermore, the heterogeneous Co/NC catalyst is highly stable without the Co leaching and deactivation issues during the recycling reaction runs.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2019
·
IF 15.548
Xian Wang,Lulu Chai,Junyang Ding,Li Zhong,Yujing Du,Ting-Ting Li,Yue Hu,Jinjie Qian,Shaoming Huang
Environmentally friendly and efficient transition metal phosphide (TMP) electrocatalysts for oxygen evolution reaction (OER) are developed to meet the growing demand for clean energy. Here we report a novel and environmentally friendly strategy for the preparation of MOF-derived bimetallic phosphide embedded in the carbonaceous matrix ( FeNiP/C ). With 3-dimensional hollow barrel shape and high specific surface, FeNiP/C-900 performs excellent OER catalytic performance, reaching a current density of 10 mA cm −2 at an overpotential of 229 mV with a low Tafel slope of 74.5 mV dec −1 . Meantime, we explore the thermal conversion mechanism of P-containing MOF and the compositional changes during heat treatment.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Bioactive Materials
·
2025
·
IF 20.3
Danyan Wang,Hui Jin,Yetao Shen,Dandan Wang,Jingjing He,Jinmiao Qu,Xiaojun He,Zhengli Jiang
Methicillin-resistant Staphylococcus aureus (MRSA) remains a major pathogen in ventilator-associated pneumonia and wound infections. To address the limitations of traditional antibiotics, we developed a novel iridium-based single-atom catalyst (Ir/CN SAC) anchored on a nitrogen-doped carbon matrix. Engineered for ultra-low metal loading and maximal active site exposure, this catalyst integrates robust photothermal and catalytic functionalities. Under second near-infrared (NIR-II, 1270 nm) irradiation, the Ir/CN SAC efficiently converts light to heat and catalytically generates reactive oxygen species (ROS), achieving a potent photothermal-catalytic synergistic effect. This dual-action mechanism enabled rapid bacterial eradication in vitro and significantly accelerated wound healing and lung tissue repair in MRSA-infected in vivo models. Transcriptomic analyses revealed downregulation of pro-inflammatory pathways, shedding light on the immunomodulatory roles of the treatment. Notably, the Ir/CN SAC exhibited negligible toxicity and enhanced peroxidase-mimicking activity via thermal activation. Collectively, the Ir/CN SAC presents a promising strategy for treating MRSA infections in wounds and the lungs via a synergistic treatment model.
研究领域:
生物医学工程
·
纳米医学
·
感染病学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）