ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Kuangfu Huang,Ruohao Dong,Chao Wang,Wen Li,Hongxia Sun,Baoyou Geng
Design and synthesis of highly efficient, stable, and low-cost catalysts have a crucial role in the study of electrolytic water. In this work, a novel Fe–Ni layered double hydroxide (LDH) material with homogeneous heterostructures is successfully synthesized by a two-step hydrothermal method. Compared with the ordinary Fe–Ni LDH arrays prepared by one step, this structure has a rougher surface, so it has a more extensive active area, thus providing more active sites. Due to the synergistic effect of different elements and more exposure of active sites, the catalytic effect of this material for water splitting is outstanding. The post-optimized FeNi@FeNi electrode exhibits extraordinary OER (oxygen evolution reaction) and HER (hydrogen evolution reaction) performance with OER overpotentials of 193, 231, and 306 mV and HER overpotentials of 127, 173, and 253 mV when the current density is 10, 20, and 50 mA·cm–2, respectively. The improved electrolytic water performance reveals that the design of homogeneous heterostructures is maybe an alternative route to exploit high-efficiency catalysts and promote the application of nonprecious metal catalytic materials.
研究领域:
材料科学
·
电化学
·
催化
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2018
·
IF 4.427
Zhe Li,Shunqin Luo,Yang Yang,Jiawei Chen
Advanced oxidation processes (AOPs) are promising environmental remediation technologies for in-situ groundwater treatment . In this study, a bentonite supported Fe/Ni bimetallic nanoparticle (BNF) was fabricated for peroxymonosulfate (PMS) activation. The resultant BNF exhibited high catalytic activity for trichloroethylene (TCE) degradation in weak alkaline conditions. The conditions optimal for this activity were assessed in terms of peroxygen type and BNF/PMS dosage ratios. Complete degradation of 0.1 mM TCE was achieved in 25 min at pH = 8.2 when BNF was present at 1 g/L and PMS at 5 mM concentrations. Analysis of the underlying mechanisms indicated that SO 4 − has a dominant role whereas OH was rather trivial. The enhancement of catalytic activity was attributed to the strong oxidization of SO 4 − , dispersion of Fe/Ni nanoparticles and synergistic effects between Fe and Ni. The effects of inorganic anions, pH and temperature on the BNF/PMS activity were also investigated. Cl − and NO 3 − has little effect on TCE degradation, while PO 4 3− and HPO 4 2− were inhibitory. Higher temperatures favored PMS activation and BNF/PMS exhibited good catalytic activity across a wide range of solution pH. The results indicate that a novel BNF/PMS system holds promise as a superior AOP to remediate emerging organic pollutants in groundwater.
研究领域:
环境科学
·
地下水修复
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Lu Li,Shiyu Ma,Huimin Liu,Zixuan Zeng,Qijie Li,Chunlin Song,Jingang Yang
Ammonia borane (NH 3 BH 3 ) as a solid chemical hydrogen storage material with a high hydrogen content can be hydrolyzed under mild conditions to release hydrogen. In this work, Fe–Ni–B/Cu(OH) 2 –Cu foam was synthesized by combining in situ growth and electroless plating. Compared with the binary Fe–B/Cu(OH) 2 –Cu foam and Ni–B/Cu(OH) 2 –Cu foam prepared by the same method, the ternary Fe–Ni–B/Cu(OH) 2 –Cu foam has superior catalytic performance. The Fe–Ni–B/Cu(OH) 2 –Cu foam catalyst was able to achieve a maximum hydrogen production rate of 5.6 ml min −1 cm −2 at 298 K with an activation energy as low as 46.3 kJ mol −1 . And more importantly, its catalytic efficiency has hardly decayed after ten cycles. These excellent properties are due to its low activation energy and the large specific surface, multi–site Cu(OH) 2 –Cu–foam carrier.
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
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Xu Pan,Junhong Wang,Ye Chen,Qing Wen,Cunguo Lin,Haiping Gao,Zhenghui Qiu,Liuqingying Yang
As a green conversion device, the electricity performance of microbial fuel cell (MFC) was mainly affected by the extracellular electron transfer (EET) process of the biofilm. This paper presented the fabrication and characterization of carbonized derivatives composed with alloy nanoparticles (NPs) derived from Zr-based metal organic frameworks, which exhibited biocompatibility and high electrocatalytic activity. As the results of bioanodes, the charge transfer resistance decreased from 5.60 Ω (Zr-C) to 0.61 Ω (Fe/Ni-Zr-C), and the exchange current density increased from 0.56 mA/cm 2 (Zr-C) to 1.40 mA/cm 2 (Fe/Ni-Zr-C). Electrochemical tests and density functional theory (DFT) confirmed that Fe-Ni alloy NPs promoted the rapid transfer of electrons within the electrode and improved the EET efficiency mediated with the flavin compounds. High throughput sequencing and PICRUSt verified the specific screening function of Fe-Ni alloy for electrogenic bacteria (mainly Geoalkalibacter) and the promoting effect on the expression of flavin-related proteins in biofilm. The maximum power density of Fe/Ni-Zr-C MFC (5.09 W/m 2 ) was higher than that of Ni-Zr-C (4.19 W/m 2 ), Fe-Zr-C (3.58 W/m 2 ) and Zr-C (3.09 W/m 2 ) MFCs. Fe/Ni-Zr-C material can act as an economical and high-performance bioelectrocatalyst to improve the power generation capability of MFC by improving EET rate and energy conversion efficiency of biofilm.
研究领域:
环境科学
·
材料科学
·
微生物学
✓ 已验证
DOI
高影响因子
Small
·
2021
·Vol. 17
·期 36
·2102002
·
IF 13.281
Hong Li,Xinxin Shu,Peiran Tong,Jihui Zhang,Pengfei An,Zhengxing Lv,He Tian,Jintao Zhang,Haibing Xia
In this work, Fe–Ni alloy nanoclusters (Fe–Ni ANCs) anchored on N, S co-doped carbon aerogel (Fe–Ni ANC@NSCA catalysts) are successfully prepared by the optimal pyrolysis of polyaniline (PANI) aerogels derived from the freeze-drying of PANI hydrogel obtained by the polymerization of aniline monomers in the co-presence of tannic acid (TA), Fe 3+ , and Ni 2+ ions. In addition, the optimal molar ratio of the TA, Fe 3+ , and Ni 2+ ions for synthesis of Fe–Ni ANC@NSCA catalysts are 1:2:5, which can guarantee the formation of carbon aerogel composed of quasi-2D porous carbon sheets and the formation of high-density Fe–Ni ANCs with an ultrasmall size between 2 to 2.8 nm. These Fe–Ni ANCs consisting of N 4 –Fe–O–Ni–N 4 moiety are proposed as a new type of active species for the first time, to the best of the authors’ knowledge. Thanks to their unique features, the Fe–Ni ANC@NSCA catalysts show excellent performance in oxygen reduction reaction with a half-wave potential ( E 1/2 ) of 0.891 V and oxygen evolution reaction (260 mV @ 10 mA cm −2 ) in alkaline media as bifunctional catalysts, which are better than the state-of-the-art commercial Pt/C catalysts and RuO 2 catalysts. Moreover, Zn–air battery assembled with the Fe–Ni ANC@NSCA catalysts also shows a remarkable performance and exceptionally high stability over 500 h at 5 mA cm −2 .
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
Molecular Catalysis
·
2022
·
IF 5.089
Kuan Wang,Zhe Cao,Junlei Wang,Zhen-Hong He,Dan Wang,Rong-Rong Zhang,Weitao Wang,Yang Yang,Zhao-Tie Liu
The development of non-precious metal catalysts in heterogeneous catalytic processes is of great importance to the hydrogenation of quinolines for both theoretical and industrial applications. Herein, an effective non-precious metal catalyst, 58% Fe 4 Ni 6 Cu 5 /MCM-41, was developed to catalyze the hydrogenation of quinolines under the green and mild conditions, which can achieve 97.5% conversion and exceeding 98% selectivity to tetrahydroquinoline in solvent-free at low temperature of 50 °C. Moreover, the acceptable results of the reusability and gram scale-up experiments proved an industrial application potential of the as-prepared catalyst. Meanwhile, in cyclohexane system, 58% Fe 4 Ni 6 Cu 5 /MCM-41 catalyst can further realize a higher activity of the hydrogenation at a lower temperature of 40 °C, achieving 98.2% conversion and 98% selectivity to tetrahydroquinoline. The existence of Fe-Ni and Ni-Cu alloys in Fe 4 Ni 6 Cu 5 /MCM-41 catalyst was demonstrated by TEM, XRD, XPS, H 2 -TPD, and Raman spectroscopy. And, Fe-Ni and Ni-Cu alloys can be well dispersed onto MCM-41 molecular sieves. For Fe 4 Ni 6 Cu 5 /MCM-41 catalyst, quinoline molecules can be adsorbed by Fe 3+ species on the surface of Fe-Ni alloy through the coordination, while hydrogen molecules can be adsorbed and activated by Ni-Cu alloy. Under the synergism of Fe-Ni and Ni-Cu alloys, the highly effective and selective hydrogenation of quinolines was achieved at low temperature and in solvent-free system. The present approach offers a prospective idea for building non-precious metal catalysts to realize the effective hydrogenation of N-heterocyclic compounds under mild conditions.
研究领域:
催化化学
·
材料科学
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ENERGY INSTITUTE
·
2023
·
IF 5.7
Jinchang Liu,Tao Qin,Kuo Li,Xin Chen,Qiuxiang Lu,Jin Deng,Xiaodong Luo,Shenfu Yuan
In this work, the promotion mechanism of Ce as Fe and Ni catalyst promoter for the catalytic reforming of biomass pyrolysis volatiles was investigated. Fe–Ni–Ce/biochar catalysts were prepared and evaluated for their catalytic performance under N 2 and steam atmospheres. The yield of Fe–Ni–Ce/biochar catalyzed syngas (H 2 +CO) increased from 224.36 mL/g to 1299.14 mL/g (800 °C) with the change of N 2 to steam atmosphere. The addition of Ce can introduce a large number of oxygen vacancies to the catalyst, and the increase of oxygen vacancies reduces the reaction barrier of the tar, thus promoting the catalytic activity of the catalyst. In the N 2 atmosphere, the electron transfer of Ce 3+ ⇄ Ce 4+ during catalytic process promotes the production of Fe 2+ to ensure the catalytic activity of the catalyst. In the steam atmosphere, Ni will activate the active sites in a steam atmosphere in water molecules. The activated active sites increase the catalyst activity by cyclic reaction with the oxygen vacancies introduced by Ce, resulting in a higher catalytic capacity of Fe–Ni/biochar than Fe–Ce/biochar. To provide the theoretical basis for the preparation of efficient catalysts based on Fe and Ni.
研究领域:
能源与环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2015
·
IF 2.352
Zhen Huang,Huanqi Jiang,Fang He,Dezhen Chen,Guoqiang Wei,Kun Zhao,Anqing Zheng,Yipeng Feng,Zengli Zhao,Haibin Li
Chemical looping dry reforming (CLDR) is an innovative technology for CO 2 utilization using the chemical looping principle. The CLDR process consists of three stages, i.e. CH 4 reduction, CO 2 reforming, and air oxidation . Spinel nickel ferrite (NiFe 2 O 4 ) was prepared and its multi-cycle performance as an oxygen carrier for CLDR was experimentally investigated. X-ray diffraction (XRD) and Laser Raman spectroscopy showed that a pure spinel crystalline phase (NiFe 2 O 4 ) was obtained by a parallel flow co-precipitating method. NiFe 2 O 4 was reduced into Fe–Ni alloy and wustite (Fe x O) during the CH 4 reduction process. Subsequent oxidation of the reduced oxygen carrier was performed with CO 2 as an oxidant to form an intermediate state: a mixture of spinel Ni 1− x Fe 2+ x O 4 , Fe 2+ y O 4 and metallic Ni. And CO was generated in parallel during this stage. Approximate 185 mL of CO was generated for 1 g spinel NiFe 2 O 4 in a single cycle. The intermediate oxygen carrier was fully oxidized in the air oxidation stage to form a mixture of Ni 1+ x Fe 2− x O 4 and Fe 2 O 3 . Although the original state of oxygen carrier (NiFe 2 O 4 ) was not fully regenerated and agglomeration was observed, a good recyclability was shown in 10 successive redox cycles.
研究领域:
化学工程
·
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Zhuoran Li,Limin Cao,Jianxin Sui,Lei Wang,Hong Lin,Kaiqiang Wang
The timely detection of freshness changes of aquatic products is crucial. In this study, we have developed a reliable, cost-effective, and user-friendly method for rapidly detecting hypoxanthine using a xanthine oxidase (XOD)/nanozyme enzymatic cascade system. The nanozyme, derived from the Fe 7 /Ni 3 metal–organic framework (Fe 7 Ni 3 MOF), exhibited good peroxidase-mimetic activity and stability. Our proposed XOD/Fe 7 Ni 3 MOF enzymatic cascade system demonstrated a linear response to hypoxanthine in the range of 3–70 μM, with a low detection limit of 1.39 μM. We also analyzed hypoxanthine in actual aquatic products, achieving spiked recoveries ranging from 90.04 % to 107.37 %. The correlation coefficient between our developed colorimetric method and the HPLC method was 0.98. Importantly, our proposed method holds several advantages over alternative techniques, particularly in terms of cost-effectiveness, precision, and speed. Consequently, this methodology shows great promise for the early detection of freshness changes in aquatic samples.
研究领域:
分析化学
·
食品科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2022
·
IF 8.035
Xiuquan Li,Zhongqing Yang,Li Zhang,Ziqiang He,Yunfei Yan,Jingyu Ran,Zukhra C. Kadirova
The catalytic reaction of ethane with CO 2 promotes the value-added conversion of natural gas and the resource utilization of greenhouse gases. In this work, the CO 2 -assisted ethane dehydrogenation reaction characteristics on Fe 1.5 Ni 0.5 /ZrO 2 (M, T, Mix) catalyst with different crystal plane structure were studied through catalyst activity test, catalytic reaction kinetics study and catalyst characterization analysis. It is found that the exposed crystal faces of the ZrO 2 -supported catalyst has a significant effect on the CO 2 -assisted ethane oxidative dehydrogenation reaction. The monoclinic phase Fe 1.5 Ni 0.5 /ZrO 2 -M catalyst exhibits the largest conversion of ethane (21.8%) and CO 2 (25.2%) and the maximum selectivity to C 2 H 4 (80.5%). Monoclinic phase of ZrO 2 selectively exposes the ( −1 1 1) and (1 1 1) low-index surfaces with higher oxygen vacancy (O v ) density and stronger metal-support interaction, which leads to the formation of more Fe x Zr 1-x O 2 structures with high catalytic activity. The reductive oxygen vacancy O v and Fe 2+ -O-Zr 3+ sites promote the activation of CO 2 through the cleavage of C=O bond to supplement O* species. The O* species on the oxidative Fe 3+ -O-Zr 4+ site are captured and combined with H* species derived from the selective cleavage of ethane C–H bond to generate H 2 O.
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
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2019
·Vol. 26
·期 9
·8768-8778
·
IF 2.914
Sun Yufeng,Liu Zongtang,Fei Zhenghao,Li Changshun,Chun Yuan,Zhang Aimin
Fe-Ni bimetallic nanoparticles supported on CNTs (Fe-Ni/CNTs) were synthesized, characterized, and applied for removal of 2,4-dichlorophenol (2,4-DCP) in aqueous solution. The removal performance was enhanced drastically on Fe-Ni/CNTs with respect to monometallic Fe/CNTs. The synergistic effect between Fe-Ni nanoparticles and CNTs has been studied in detail. The research results indicated that the doping of Ni played an important role in promoting the catalytic degradation of 2,4-DCP. And the presence of CNTs not only could effectively reduce the aggregation of nanoparticles but also facilitate the mass transfer of 2,4-DCP and the formation of active atomic hydrogen during the catalytic process. In addition, the removal kinetics of 2,4-DCP by Fe-Ni/CNTs were in agreement with a pseudo-first-order model, and the rate constants were dependent on a number of factors including the initial concentration of 2,4-DCP, the dosage of Fe-Ni/CNTs, pH value of the solution, and doping amount of Ni. The degradation mechanism involved the adsorption by CNTs and catalytic reduction by Fe under the stimulating of Ni, and the preferred dechlorination followed the order of para-Cl > ortho-Cl. The study confirmed that Fe-Ni/CNTs had a potential to be a promising catalytic material for removal of chlorophenol and had a great prospect for practical application.
研究领域:
环境科学
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Junshuang Zhou,Ying Bian,Zhuoran Hao,Kuo Wei,Jiajia Xiao,Jing Wang,Yuanzhe Wang,Huiyang Gou,Faming Gao
Inhibiting the chlorine evolution reaction (CER) is of great significance for the design and development of oxygen evolution catalysts with high current density for seawater electrolysis. The KOH concentration plays a very important role in controlling the potential of chlorine evolution in seawater electrolysis. However, the effect of its concentration, especially the high one (for example, >1 M), on the OER activity of different catalysts has not been studied so far. Here, we found that the KOH concentration has different linear effects on the OER activity for different catalysts, and we first propose a novel concept named concentration activity coefficient (CAC) to express the linear relationship between the OER activity of the catalyst and the KOH concentration in seawater electrolysis. Based on CAC, we report a Co S-NiFe 2 O 4 catalyst with ultrahigh oxygen evolution activity in the 3 M KOH + seawater. This is due to the strong electronic interaction between Co and S-NiFe 2 O 4 . At current densities of 500 mA cm −2 and 1000 mA cm −2 , the overpotentials of Co S-NiFe 2 O 4 are 270 mV, and 287 mV, respectively, which are much lower than those of the existing electrocatalysts . More promising, the new catalysts also showed a splendid Tafel slope of 18.8 mV dec −1 and a long catalytic lifetime in concentrated alkaline electrolyte . Our findings provide a better understanding of the correlation between the KOH concentration and the OER activity and open new avenues for design and development of electrocatalysts for the next generation of high OER activity in seawater electrolysis.
研究领域:
电化学
·
材料科学
·
能源材料
·
催化
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）