ELECTROCHIMICA ACTA
·
2012
·
IF 3.832
Xianjun Liu,Deyu Wang,Siqi Shi
The electrochemically interfacial stability between Ni foam and organic electrolyte is studied under Ar and O 2 atmospheres, respectively. The potential of Ni foam cycled under Ar atmosphere does not reach 3.8 V vs. Li/Li + , and is finally stabilized at ∼3.4 V vs. Li/Li + . This phenomenon is the result of the electrolyte's continuous decomposition, which produces a thick layer of particles (0.8–1.2 μm) covered on Ni foam surface. Ni foam under O 2 atmosphere can be successfully cycled between 2.0 and 4.5 V vs. Li/Li + although there exist some precipitations on the surface, which originate from the electrolyte decomposition occurring at 4.2 V vs. Li/Li + in the initial charge. For the cycling between 2.0 and 4.0 V vs. Li/Li + , Ni foam surface almost keeps intact. Our results reveal that O 2 atmosphere significantly improves the electrochemical stability between Ni foam and electrolyte and thus enables Ni foam to work as current collector in rechargeable lithium-air battery .
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2021
·
IF 4.837
Nanyu Fan,Quan Kong,Ruifeng Lang,Hongtao Guan,Gang Chen,Chengjun Dong
One-dimensional (1D) Zn 2 GeO 4 rods were in-situ grown on Ni foam (NF) using a ethylenediamine (En)/water mixed solvent by a hydrothermal route in one single step. Such rhombohedral phase Zn 2 GeO 4 rods are 1–2 μm in diameter and a few micrometers in length. Ethylenediamine is found to play a critical role in coordinating with starting zinc and germanium ions and acting as template. The Zn 2 GeO 4 /NF was developed as a new none-enzymatic hydrogen peroxide (H 2 O 2 ) sensor. In electrochemical studies, the Zn 2 GeO 4 /NF electrode exhibits high sensitivity (3974 μM mM −1 cm −2 ), wide linear detection range (1–4000 μM), fast response (<9 s), low detection limit (1 μM), excellent selectivity and stability towards H 2 O 2 . Several factors such as intrinsic nature of Zn 2 GeO 4 , the unique microstructure and the seamless contact with NF are believed to attributed to the excellent electrochemical sensing performances.
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Ran Duan,Yejun Li,Shen Gong,Yonggang Tong,Zhou Li,Weihong Qi
The development of industrial application of water splitting demands simple and effective methods for the preparation of highly efficient electrocatalysts that are inexpensive and robust. Herein, we report a simple activation method to decorate 3D cobalt iron oxyhydroxide (CoFe-OOH) nanosheets on Co 2 P nanoparticles with Ni foams (NF) as substrates. The synthesized catalysts exhibit excellent activity for electrochemical oxygen evolution reaction due to the hierarchical heterostructures and synergistic effects of CoFe-OOH and Co 2 P. The as-prepared catalysts require a low overpotential of 199 mV to deliver 30 mA cm −2 in oxygen evolution reaction in 1 M KOH with a small Tafel slope of 39 mV dec −1 , indicating favorable kinetics during electrolysis. The synthesized catalysts are further used as cathode and anode for overall water splitting, which only requires a cell voltage of 1.60 V at a current density of 30 mA cm −2 . This work provides new insights on the preparation of efficient electrocatalysts for overall water splitting, which may have the potentials for industrial water electrolysis.
✓ 已验证
DOI
高影响因子
SYNTHETIC METALS
·
2019
·
IF 2.87
Liang Zhang,Jishun Liu,Xiaolei Peng,Qiang Cui,Dong He,Chun Zhao,Hui Suo
Herein, an electrochemical ammonia sensor based on Ni foam-supported silver/polypyrrole and platinum nanoparticles electrode (Pt-Ag/PPy-NiF) was designed and constructed. The Ag/PPy layer was firstly grown on Ni foam surface via oxidation reduction reaction, and then Pt nanoparticles with great electrocatalytic activity were electrodeposited on the surface of Ag/PPy-NiF via cyclic voltammetry methodology. Electrochemical experiments demonstrated that the Pt-Ag/PPy-NiF electrode showed a great electrocatalytic ability of the oxidation of ammonia and an electrochemical aqueous ammonia sensor was proposed accordingly. The ammonia sensor showed a sensitivity of 0.089 mA μM −1 , a detection limit of 37 nM (S/N = 3) and a wide linear range, as well as presenting a good anti-interference capability against many common ions in water. These excellent performances can be mainly attributed to large specific surface of electrode and great electrocatalytic ability of Pt nanoparticles.
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2026
·
IF 3.5
Hong-Da Zhang,Shu-Ting Bao,Shi-Chao Su,Ming-Fei Dai,Zhi-Ping Zhao,Le Sang
The coating stability of dopamine-polymer-modified Ni foam is important for its application in micropacked bed reactors. In this study, hydrophilically modified polydopamine (PDA)/Ni foam and polylevodopa (PLD)/Ni foam, and hydrophobically modified F 9 -PDA/Ni foam and F 9 -PLD/Ni foam were prepared. The hydrophobically modified Ni foam packings had a gas-liquid mass transfer enhancement performance in micropacked bed reactors. Based on the gas-liquid flushing experiment results, the stability of PDA/Ni foam and F 9 -PDA/Ni foam was better than that of PLD/Ni foam and F 9 -PLD/Ni foam. PFHS can interact with PDA and PLD to produce hydrogen bonds and chemical reactions. The adsorption of PFHS on PLD was more stable, and the chemical reaction was more spontaneous. The experiment and DFT calculation confirmed the binding strength of PDA/PLD and Ni foam acts as a key controlling factor for the overall stability of F 9 -PDA/PLD-Ni foam. As a result, the adhesion of PDA on the Ni foam was significantly better than that of PLD.
✓ 已验证
产品关联
DOI
高影响因子
Arabian Journal of Chemistry
·
2023
·
IF 6
Yongjun Shen,Yin Chen,Shuaikang Fang,Jae Kwang Park,Kun Feng
To solve the current energy and environmental dilemma, hydrogen energy is considered to be the best clean energy source to replace traditional fossil fuels. Water electrolysis as the main technology for hydrogen production has been affected by two half-reactions, making it difficult to improve the yield. To solve this problem, the development of inexpensive and efficient bifunctional electrocatalysts is the focus of current research. CuCo 2 S 4 /NF(Ni foam) nanowires are synthesized using a mild hydrothermal process and were later placed in a plasma reactor. Application of the voltage triggers a chemical reaction between the microdischarge wires and the sample. This leads to a change in the physical morphology of the catalyst and an improvement in its catalytic performance. The morphological characterization results show that the catalyst modification generates a distinct flower-like nanowire structure, which helps in the solid attachment of the catalyst to the nickel foam surface. The plasma-modified CuCo 2 S 4 /Ni foam (PA@CuCo 2 S 4 /NF) exhibits low overpotentials of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline solutions. Additionally, the Tafel slopes of the HER and OER are 85.9 mVdec −1 and 142.7 mVdec −1 , respectively, indicating optimal reaction kinetics. A cell voltage of only 1.55 V is required to provide a 10 mA cm −2 current during water splitting. This study validates the feasibility of using plasma technology to create high-performance electrocatalysts.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Yanqing Fu,Dongdong Zhang,Pan Li,Yi Han,Juan You,Qiliang Wei,Weiyou Yang
The development of efficient non-precious metal electrocatalysts is essential for oxygen evolution reaction (OER) for water splitting. Among them, amorphous bimetallic NiFe-based compounds are recognized as one of the excellent candidates for efficient OER. Herein, the Ni-Fe-Se film is rationally designed via facile one-step electrodeposition with tailored active sites and thicknesses. Accordingly, the optimized sample, with an increased Fe-incorporation level and a thickness of ∼50 nm, shows a low overpotential of ∼290 mV at a current density of 40 mA cm −2 and long-term durability in 1 M KOH solution, representing its overall excellent OER performance. Furthermore, operando Raman and ex-situ XPS are used to identify the active sites for OER. This work provides some new insights into exploring earth-abundant free-standing catalysts for OER toward overall water-splitting applications.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Shixiang Xue,Tong Zhou,Pan Wu,Liang Zhao,Yanli Nan,Mingtao Qiao,Wanying Lei
Exploring high-efficient, earth-abundant and stable electrocatalyst for oxygen evolution reaction (OER) is of vital importance for large-scale implementation of energy converting and storing. Thus, we fabricated a free-standing hierarchical heterostructure electrode of Ni 0.85 Se@CoFe LDH/NF via a rational combination of hydrothermal, selenization and electrodeposition process, among which the ultrathin CoFe LDH nanosheets intimately assembled onto the vertical aligned Ni 0.85 Se nanosheets supported on Ni foam. The constructed core-shell nanosheet arrays hold the plentiful hetero-interfaces and intimate interactions through metal-oxygen bonds between two individuals, which guarantee the fast OER kinetic processes. Additionally, CoFe LDH with crystalline/amorphous hybrid structure favors providing more reaction sites. Remarkably, the optimal Ni 0.85 Se@CoFe LDH/NF binary composites possess outstanding OER activity with a low overpotential of ∼223 and 280 mV at 10 mA cm −2 and 100 mA cm −2 in alkaline solution as well as good durability. This research offers an alternative approach for improving electrocatalytic water splitting through constructing 3D hierarchical heterostructures.
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 26
·10061-10068
·
IF 4.569
Congli Wang,Hongfang Jiu,Lixin Zhang,Wei Song,Yufang Zhang,Hao Wei,Qianwen Xu,Yaqi Qin,Sicong Che,Zhixin Guo
It is of utmost importance to explore bifunctional electrocatalysts for water splitting. Herein, unique ZnCo2O4–CoOOH heterostructured ultrathin nanosheets on Ni foam are reported that combines a two-step hydrothermal method. This catalyst exhibits excellent catalytic performances to achieve a current density of 10 mA cm−2 with an ultralow overpotential of 115 mV for HER, attaining an overpotential of 238 mV at 20 mA cm−2 for OER. Remarkably, ZnCo2O4–CoOOH/Ni shows a voltage of 1.494 V to drive a current density of 10 mA cm−2. Such performances are due to the inter-penetrative pores present in the ultrathin nanosheets that provide large surface areas and expose massive active sites to enhance activities. In addition, the unique nanosheet structure and the 3D Ni foam substrate possess large specific surface areas, which can facilitate mass diffusion. This excellent performance is ascribed to the ZnCo2O4–CoOOH heterostructure that manipulates strong synergy to improve the electrochemical activity. This study offers new insight on an innovative approach for the exploitation of effective bifunctional electrocatalysts with a heterostructure.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Xuan Liu,Jianying Wang,Zhongying Fang,Shuaiqi Gong,Dengke Xiong,Wei Chen,Deli Wu,Zuofeng Chen
Herein, an ultrafast electro-corrosion approach is developed for activating Ni foam (NF) into an efficient electrocatalyst for upcycling polybutylene terephthalate (PBT) waste plastic. The electro-corrosion process assisted by Cl − is completed by only 6 CV cycles (∼3 min) and the activity of the treated NF (T-NF), characterized by the integrated Ni 2+ /Ni 3+ peak area is enhanced by 150 times. The T-NF electrode exhibits excellent catalytic activity toward 1,4-butanediol oxidation , delivering a current density of 50 mA cm − 2 at 1.36 V (vs. RHE). This allows the electrocatalytic reforming of 1,4-butanediol component in PBT hydrolysate into succinate with a high Faraday efficiency 93%. The in-situ Raman and FTIR spectroscopies combining density functional theory calculations identify catalytically active centers, critical intermediates, and favorable pathway for 1,4-butanediol oxidation to succinate. This work provides an ultrafast one-step surface engineering strategy to turn pristine Ni foams into high-performance electrocatalysts for upcycling PBT plastic and other electrochemical applications.
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2020
·
IF 7.864
Xiaotong Chen,Ting Zhang,Miao Kan,Dinggui Song,Jinping Jia,Yixin Zhao,Xufang Qian
Energy consumption and long-term stability of a cathode are two important aspects of great concern in electrocatalytic nitrate reduction. This work studied a binderless FeNi/graphitized mesoporous carbon directly formed on Ni Foam (FeNi/g-mesoC/NF, 7.3 wt % of Fe) and evaluated its electrocatalytic nitrate reduction performance. We proposed a unique structure model of FeNi/g-mesoC/NF cathode in which FeNi alloy nanoparticles were uniformly embedded in mesoporous carbon and graphitized carbon shells were coated on isolated alloy nanoparticles. Oxygen vacancies (OVs) in FeNi oxide passivating layer facilitate the conversion of NO3–-N anions on cathode. Toxic NO2–-N was almost undetected due to the synergetic effects of FeNi electrocatalysis, and the NO3–-N conversion was high in comparation with ever reported iron-based cathode. The NO3–-N conversion showed ultrahigh electrocatalytic stability during one-month-recycling test while the physiochemical properties showed negligible change for FeNi/g-mesoC/NF except the increase of OVs. The energy consumption to treat simulated underground water (50% of NO3–-N conversion) was low (0.7 kWh mol–1) for 50 mg L–1 NO3–-N. This binderless composite cathode shows great potential in electrocatalytic NO3–-N removal in underground water.
✓ 已验证
DOI
PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2020
·Vol. 26
·期 63
·14496-14501
·
IF 4.857
You Xu,Xingjie Chai,Mengying Liu,Tianlun Ren,Shanshan Yu,Ziqiang Wang,Xiaonian Li,Liang Wang,Hongjing Wang
Graphical Bifunctional electrocatalysts : Two-dimensional NiIr@N-doped carbon nanocomposites supported on Ni foam substrate function as bifunctional electrocatalysts for overall water splitting in alkaline conditions. Electrochemical water splitting can provide a promising avenue for sustainable hydrogen production. Highly efficient electrocatalysts toward the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are extremely important for the practical application of water splitting technology. Herein, a one-step annealing strategy is reported for the fabrication of a metal–organic framework-derived bifunctional self-supported electrocatalyst, which is composed of two-dimensional N-doped carbon-wrapped Ir-doped Ni nanoparticle composites supported on Ni foam (NiIr@N-C/NF). The resultant NiIr@N-C/NF displays excellent electrocatalytic performance in 1.0 m KOH, with low overpotentials of 32 mV at 10 mA cm −2 for the HER and 329 mV at 50 mA cm −2 for the OER. Particularly, the HER-OER bifunctional NiIr@N-C/NF needs only 1.50 V to yield 10 mA cm −2 for overall water splitting.
✓ 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）