APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
·
IF 24.319
Chaojie Lyu,Jiarun Cheng,Kaili Wu,Jiwen Wu,Ning Wang,Zhonglu Guo,Pengfei Hu,Woon-Ming Lau,Jinlong Zheng
Interface engineering is an effective strategy to regulate surface properties and improve the catalytic activities of materials. Here we develop an interface engineered core-shell structure FeP@CoP catalyst, which only requires 50 mV to realize current density of 10 mA/cm 2 with a low Tafel slope of 51.1 mV/dec in 1 M KOH. Density functional theory (DFT) simulations indicate the FeP@CoP interface exhibits optimal H* adsorption energy (0.06 eV) compared with pure-phased CoP (0.26 eV) and pure-phased FeP (−0.18 eV), which is attributed to the significantly electronic structure modulation of Fe and Co atoms at the interface domain. Furthermore, the assembled NiFe LDH@Co 3 O 4 /NF || FeP@CoP/NF electrolyzer only demands the voltages of 1.50 and 1.70 V to achieve 10 and 100 mA/cm 2 under 1 M KOH. The electrolyzer also exhibits considerable catalytic performance in alkaline seawater electrolyte. What's more, it also can be driven by a commercial Si solar panel under AM 1.5 G 100 mW/cm 2 illumination. The regulation of interface-effect paves a novel avenue for constructing high-performance catalysts for hydrogen production .
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2022
·Vol. 13
·期 1
·1-9
·
IF 17.694
Wang Ziming,Berbille Andy,Feng Yawei,Li Site,Zhu Laipan,Tang Wei,Wang Zhong Lin
Mechanochemistry has been studied for some time, but research on the reactivity of charges exchanged by contact-electrification (CE) during mechanical stimulation remains scarce. Here, we demonstrate that electrons transferred during the CE between pristine dielectric powders and water can be utilized to directly catalyze reactions without the use of conventional catalysts. Specifically, frequent CE at Fluorinated Ethylene Propylene (FEP) - water interface induces electron-exchanges, thus forming reactive oxygen species for the degradation of an aqueous methyl orange solution. Contact-electro-catalysis, by conjunction of CE, mechanochemistry and catalysis, has been proposed as a general mechanism, which has been demonstrated to be effective for various dielectric materials, such as Teflon, Nylon-6,6 and rubber. This original catalytic principle not only expands the range of catalytic materials, but also enables us to envisage catalytic processes through mechano-induced contact-electrification.
研究领域:
环境科学
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化工工程
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催化
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机械工程
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
·
IF 4.65
Yingde Huang,Rongtian Yu,Gaoqiang Mao,Wanjing Yu,Zhiying Ding,Yanbing Cao,Junchao Zheng,Dewei Chu,Hui Tong
Iron phosphide as anode material for lithium ion batteries (LIBs) attracts a lot of attention because of large theoretical capacity. Nevertheless, the inherent disadvantages of huge volume expansion and low electrical conductivity inhibit its further application. In this work, FeP@C/reduced graphene oxide (rGO) anode material with unique polyhedral structure was synthesized by a simple solvothermal and low temperature phosphiding method. Metal organic framework MIL-101(Fe) was used as the precursor and anchored on the surface of graphene oxide (GO). The organic ligand of MIL-101(Fe) was transformed to polyhedral carbon skeleton, which combined with GO to form a three-dimensional conductive network that provides efficient channels for electrons and ions, and attenuates volume expansion during the insertion/extraction of lithium ions , and avoids partial pulverization and improves cycle stability. The optimized FeP@C/rGO anode material showed a discharge capacity of 414.7 mAh g −1 at the current density of 8 A g −1 , and reached a capacity of 949.7 mAh g −1 after 100 cycles at 0.1 A g −1 ; even cycled at the current density of 1 A g −1 , it provided a capacity of 737.7 mAh g −1 after 450 cycles. In virtue of ingenious microstructure design and structural optimization, FeP@C/rGO exhibited outstanding electrochemical properties in LIBs.
研究领域:
材料科学
·
电化学
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纳米材料
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能源存储
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无机非金属材料
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功能材料
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电池技术
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2020
·Vol. 30
·期 10
·1909283
·
IF 16.836
Shanshan Shi,Congli Sun,Xiuping Yin,Liying Shen,Qinhao Shi,Kangning Zhao,Yufeng Zhao,Jiujun Zhang
Transition metal phosphides (TMPs) possess high theoretical sodium storage capacities, but suffer from poor rate performance, due to their intrinsic low conductivity and large volume expansion upon sodiation/desodiation. Compositing TMPs with carbon materials or downsizing their feature size are recognized as efficient approaches to address the above issues. Nevertheless the surface-controlled capacitive behavior is generally dominated, which inevitably compromises the charge/discharge platform, and decreases the operational potential window in full-cell constructions. In this work, a novel architecture (FeP@OCF) with FeP quantum dots confined in P-doped 3D octahedral carbon framework/carbon nanotube is rationally designed. Such structure enables a simultaneous enhancement on the diffusion-controlled capacity in the platform region (2.3 folds), and the surface-controlled capacity in the slope region (2.9 folds) as compared to that of pure FeP. As a result, an excellent reversible capacity (674 mAh g −1 @ 0.1 A g −1 ) and a record high-rate performance (262 mAh g −1 @ 20 A g −1 ) are achieved. A full-cell FeP@OCF// Na 3 V 2 (PO 4 ) 3 is also constructed showing an outstandingly high energy density of 185 Wh kg −1 (based on the total mass of active materials in both electrodes), which outperforms the state-of-the art TMP-based sodium-ion battery full cells.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
RARE METALS
·
2025
·
IF 11
Li-Xia Wang,Jia-Sui Huang,Xiao-Yang Cheng,Zhi-Yang Huang,A-Lin Zhou,Shu-Hui Sun,Xiu-Lin Yang,Tian-Xiao Sun,Bin Wu
en This link goes to a English section zh This link goes to a Chinese section The design of nanoparticles confined in hollow N-doped carbon structures is crucial for improving the oxygen reduction reaction (ORR) kinetics, yet achieving this remains a significant challenge. In this work, hollow porous nitrogen-doped carbon encapsulated FeP/Fe 2 P (H-FeP/Fe 2 P) were successfully constructed via a templating method combined with dopamine hydrochloride coating, acid etching, and subsequent high-temperature phosphating. In situ spectroelectrochemical investigations and theoretical results demonstrate that the adsorbed hydroxyl species (*OH) can be readily released from the catalyst surface by facilitating the dissociation of oxygen–oxygen bonds at the active sites of Fe, thus accelerating the kinetics of the ORR. The optimized H-FeP/Fe 2 P achieves a high limiting current density of 5.5 mA cm −2 and a low Tafel slope of 39 mV dec −1 in 0.1 M KOH, outperforming corresponding solid samples and most reported transition metal phosphide catalysts. Moreover, the H-FeP/Fe 2 P-based aqueous ZAB exhibits remarkable performance, including high peak power density (175 mW cm −2 ), large specific capacity (813 mAh g −1 Zn ), and stable charge/discharge stability over 800 h. The corresponding solid-state zinc-air battery also delivers a high peak power density of 101 mW cm −2 and excellent flexibility. The carbon confinement strategy proposed in this study opens new avenues for developing high-performance and cost-effective non-precious metal ORR catalysts in zinc-air batteries. 摘要 en This link goes to a English section zh This link goes to a Chinese section 将纳米颗粒限域于中空氮掺杂碳结构中的设计对提升氧还原反应(ORR)动力学性能至关重要,但实现这一目标是一个重大挑战。本研究通过模板法结合盐酸多巴胺包覆、酸蚀刻及后续高温磷化工艺,成功构建了中空多孔氮掺杂碳封装FeP/Fe 2 P(H-FeP/Fe 2 P)。原位光谱电化学研究与理论计算结果表明,通过促进Fe活性位点处氧-氧键的解离,吸附羟基物种(*OH)可从催化剂表面顺利脱附,进而加快ORR的反应动力学。优化后的H-FeP/Fe 2 P在0.1 M KOH电解液中展现出优异的ORR性能,极限电流密度高达5.5 mA cm −2 ,塔菲尔斜率低至39 mV dec −1 ,其性能优于对应的实心结构样品及多数已报道的过渡金属磷化物催化剂。此外,基于H-FeP/Fe 2 P的水系锌-空气电池(ZAB)同样表现出卓越的性能,包括175 mW cm −2 的高峰值功率密度、813 mAh g −1 Zn 的大比容量,以及超过800 h的稳定充放电性能。相应的固态锌-空气电池也具备101 mW cm −2 的高峰值功率密度和出色的柔韧性。本研究提出的碳限域策略,为开发锌-空气电池中高性能、低成本的非贵金属ORR催化剂开辟了新途径。
研究领域:
材料科学
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电化学
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能量存储与转换
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纳米技术
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催化
✓ 已验证
产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2025
·
IF 2.9
Zhenyi Chen,Shuo Li,Kun Feng,Zhen Wen,Jun Zhong
Low-level radioactive wastewater containing Co(II)–EDTA generated in the nuclear industry is harmful to the environment, but it is difficult to remove owing to the high stability of metal–organic complexes. Here, we report efficient contact-electro-catalysis (CEC) to achieve the decomplexation of Co(II)–EDTA by using commercial fluorinated ethylene propylene (FEP) powder as a dielectric catalyst. The reaction generated reactive oxygen species through solid–liquid interfacial charge transfer, disrupting the chemical bonds and then oxidizing the central atoms in Co(II)–EDTA to form Co(III)–EDTA with vacancies. The Co(III)–EDTA could be easily removed from the solution under alkaline conditions. The decomplexation efficiency reached a high value of 41.6%, with a constant reaction rate of 0.024 min−1 in 240 minutes. The FEP also exhibited excellent recyclability over 40 h without obvious changes. Unlike conventional advanced oxidation processes, this approach does not require the use of electrodes or chemical oxidants, leading to low energy consumption. This approach also holds great potential for green wastewater management via integration with ambient mechanical energy sources (e.g., wind and hydrostatic pressure).
研究领域:
环境科学
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核工程
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催化化学
·
废水处理
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Guang Xia,Jiajia Ye,Zifan Wang,Juan An,Zhen Kong,Quanxiang Han,Mingyuan Pang,Haohao Zhang,Wensi Li,Jibin Song
The development of Lithium‑sulfur batteries (LSBs) is considerably limited by the shuttle effect and slow redox kinetics, which result in low cycle stability and decreased energy density. To enhance the energy density and accelerate the reaction kinetics of LSBs, a heterostructure consisting of FeP/Fe(PO 3 ) 3 nanoparticles was anchored on three-dimensional hierarchical porous carbon nanosheets using a simple soaking and carbonization method. This FeP/Fe(PO 3 ) 3 heterojunction, featuring an intrinsic built-in electric field (BIEF) effect and sulphiphilic characteristics, exhibited high catalytic efficiency in trapping lithium-polysulfides (LiPSs), regulated the nucleation of Li 2 S, and accelerated oxidation conversion reactions. The 3D porous hierarchical carbon nanosheets, derived from corn stalks, provide a large surface area and numerous pores, which effectively accommodate the considerable volume expansion of S 8 and Li 2 S during the electrochemical reactions, while also offering a conductive network to facilitate electron and Li + ion transport. As expected, the PCS/FeP/Fe(PO 3 ) 3 @S cathode demonstrated excellent electrochemical performance, delivering a discharge capacity of 663.8 mAh g −1 at a current rate of 5.0C. Additionally, the constructed Li S pouch cell achieved a high areal capacity of 11.0 mAh cm −2 and maintained an energy density of 450 Wh kg −1 with a sulfur mass loading of 9.0 mg cm −2 . This work provides a novel approach to developing stable, high-energy-density LSBs for practical energy storage applications.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 6
·3369-3378
·
IF 11.301
Zhifang Zhang,Chenxiao Wu,Zhonghui Chen,Huiyu Li,Haijing Cao,Xiaojing Luo,Zebo Fang,Yanyan Zhu
With excellent theoretical capacities, transition-metal phosphides (TMPs) have been recognized as promising anode materials for potassium-ion batteries (KIBs) but there remain considerable challenges in improving the structural stability and electrochemical performance. Moreover, the electrochemical reaction mechanism of TMP-based KIB anodes is still unclear and mostly unexplored. Herein, we elaborately design a flexible and hierarchically porous anode consisting of discrete FeP hollow nanospheres well encapsulated within a three-dimensional graphene skeleton (3DG/FeP) via a novel spatially confined one-step thermal transformation strategy using a 3DG/metal–organic framework (MOF) as the precursor for the first time. The unique architecture provides interconnected porous conducting network and tight contact between graphene and FeP hollow nanospheres as well as sufficient stress buffer nano-hollow spaces to greatly promote the charge transport and maintain the structural integrity. Thus, the 3DG/FeP anode delivers a high reversible capacity of 323 mA h g−1 at 0.1 A g−1 and ultrastable cycle performance with a capacity retention of 97.6% at 2 A g−1 after 2000 cycles, which is almost the best result among all the reported FeP anodes for KIBs. Further detailed characterizations not only elucidate 3DG confinement-promoted microphase separation and nanoscale Kirkendall effects of MOF but also explore the multiple reversible intercalation and conversion processes of K+ insertion/extraction in the FeP component.
研究领域:
材料科学
·
储能技术
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电化学
·
纳米材料
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Jie Liu,Xiaoli Sun,Yunmei Du,Yanru Liu,Wenna Wang,Dehong Chen,Ruiyong Zhang,Lei Wang
Because of the huge energy consumption required to drive the Volmer step, the reaction efficiency of alkaline hydrogen evolution reaction (HER) is usually 2–3 orders of magnitude lower than that of acidic HER. Therefore, overcoming the weakness of alkaline HER from the perspective of reaction kinetics is the core of electrode design. Density functional theory (DFT) illustrates that Ru dopants trigger the domino effect of electrodes. Ru induces electron redistribution of Fe@a/c-interface, increasing H 2 O adsorption and O-H bonds length. The longer O-H bonds promote the transfer of dissociated H to Ru@a/c-interface, thereby establishing a locally acid-like environment and efficient Volmer-Tafel mechanism in KOH. As expected, the well-designed a/c-Ru-FeP/IF obtains 1 A cm −2 at only 189 mV for alkaline HER. Overall, this work provides a new idea for optimizing the local reaction environment and reaction kinetics in alkaline HER by introducing a single element to trigger the domino effect of the electrode.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2022
·Vol. 18
·期 34
·2202725
·
IF 15.153
Pengxiang Zhang,Yanyan Liu,Songlin Wang,Limin Zhou,Tao Liu,Kang Sun,Huaqiang Cao,Jianchun Jiang,Xianli Wu,Baojun Li
Oxygen reduction reaction (ORR) is the key reaction on cathode of rechargeable zinc–air batteries (ZABs). However, the lack of protons in alkaline conditions limits the rate of ORR. Herein, an activating water strategy is proposed to promote oxygen electrocatalytic activity by enhancing the proton production from water dissociation. FeP nanoparticles (NPs) are coupled on N-doped wood-derived catalytically active carbon (FeP-NWCC) to associate bifunctional active sites. In alkaline, FeP-NWCC possesses outstanding catalytic activities toward ORR ( E 1/2 = 0.86 V) and Oxygen evolution reaction (OER) (overpotential is 310 mV at 10 mA cm −2 ). The liquid ZABs assembled by FeP-NWCC deliver superior peak power density (144 mW cm −2 ) and cycle stability (over 450 h). The quasi-solid-state ZABs based on FeP-NWCC also display excellent performances. Theoretical calculation illustrates that the superb bifunctional performance of FeP-NWCC results from the elevated dissociation efficiency of water via FeP NPs to assist the oxygen catalytic process. The strategy of activating water provides a new perspective for the design of ORR/OER bifunctional catalysts. This work is a model for the application of forest biomass.
研究领域:
材料科学
·
电化学
·
能量存储
·
催化
·
可持续材料
✓ 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）