JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Jue Wang,Zhi Li,Libei Feng,Dachun Lu,Wei Fang,Qinfang Zhang,Daniel Hedman,Shengfu Tong
The development of efficient and stable catalysts for oxygen evolution reaction (OER) in seawater presents a major challenge for hydrogen production through water electrolysis. In this work, we present a stable NiFe foam catalyst with a Se-doped Ni/Fe oxide surface prepared through a combination of chemical vapor deposition and electrochemical exfoliation. This method effectively modifies the surface of the commercial NiFe foam to a rough and stable Se-doped Ni/Fe oxide surface, displaying exceptional OER performance in both freshwater and seawater with more than 54 days stability in natural seawater. Characterizations reveal Ni-Se doped Fe oxide surface, with subsurface layers consisting of Ni alloyed with a moderate concentration of Fe, optimizes the adsorption free energy of oxygen-containing intermediates. Our results demonstrate a surface engineering approach to activate NiFe foam as a robust OER catalyst for seawater electrolysis, which is beneficial for the hydrogen economy and for the environment.
研究领域:
材料科学
·
电化学
·
能源技术
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Shiwei Song,Yanhui Wang,Shuyu Zhou,Hongwei Gao,Xueqing Tian,Yungang Yuan,Wei Li,Jianbing Zang
Seawater is more favorable than freshwater in large-scale hydrogen production by electrolysis as it is considered to be the most plentiful natural resource. However, chloride ions with high concentrations in the electrolyte may easily cause corrosion to electrodes or undesirable side reactions during the implementation of seawater electrolysis, thereby degrading the overall system’s efficiency. Therefore, it is necessary to develop an electrocatalyst with excellent catalytic activity and corrosion resistance in order to achieve high-efficiency seawater electrolysis. In this study, a three-dimensional heterogeneous architecture of (FeNi)9S8 nanosheets uniformly decorated with an amorphous MoS2 layer on Ni-Fe foam (MoS2-(FeNi)9S8/NFF) was successfully prepared via one-step hydrothermal vulcanization. Benefiting from the strong interaction at the heterogeneous interface, effective charge transfer, and the enhanced corrosion resistance by MoS2-(FeNi)9S8 coupling, the self-supported MoS2-(FeNi)9S8/NFF electrocatalyst exhibited superior catalytic activity and stability toward overall fresh/seawater splitting. Moreover, it required a low battery voltage of 1.57 and 1.62 V to reach 50 and 100 mA cm–2 in an alkaline natural seawater electrolyte, respectively, and possessed impressive durability up to 72 h, exceeding the pair of Pt/C||IrO2. Accordingly, this study provides a route for the preparation of corrosion-resistant electrocatalysts of hydrogen production by seawater electrolysis.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2015
·
IF 3.313
Yanhui Liang,Qian Liu,Abdullah M. Asiri,Xuping Sun,Yuquan He
In this communication, we report the first use of commercial nickel–iron (NiFe) foam as a novel three-dimensional anode for oxygen evolution reaction in alkaline electrolyte . The NiFe foam electrode exhibits onset overpotential of 300 mV and affords current density of 10 mA cm −2 at an overpotential of 320 mV, with catalytic activity being maintained for at least 10 h. Further acid etching of this electrode leads to greatly enhanced OER activity.
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 ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Peng Chu,Hailei Zhao,Jie Wang,Hongliang Xie,Chongqi Han,Zhao Yang
Negative current collectors play vital roles in the electrochemical performance of liquid metal batteries (LMBs). Employing a three-dimensional (3D) current collector is an effective approach to host molten lithium and reduce the effective current density. The Ni-Fe foam is a frequently used 3D current collector for the negative electrode. However, the corrosion of molten lithium towards the Ni-Fe foam skeleton devastates the 3D structure of the current collector and so deteriorates seriously the electrochemical performance of LMB. To enhance the corrosion resistivity, herein, the graphite layer coated Ni-Fe foam (Graphite@Ni-Fe) is prepared by the chemical vapor deposition method. The prepared scaly-like graphite layer plays a bifunctional role in chemistry, preventing corrosion as an effective barrier and improving remarkably the surface lithiophilicity of Ni-Fe foam. The assembled Li||Bi batteries with Graphite@Ni-Fe foam as negative current collector exhibit stable cycling performance with capacity retention of 98.10% and high Coulombic efficiencies over 98.3% at 0.4 A cm −2 over 100 cycles at 500 °C. More importantly, outstanding rate capability is achieved and almost no capacity degradation is observed upon current density change from 0.2 to 2.0 A cm −2 . This work highlights the importance of the lithiophilicity and the corrosion resistance ability of the negative current collectors for LMBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 46
·21297-21306
·
IF 3.3
Qing Guo,Lin Wu,Jie Feng,Zhijuan Zou,Chunmei Zeng,Kunpeng Song
Transition metal phosphides (TMPs) with an adjustable structure can greatly promote the activity of water electrolysis owing to the zero-valence metal property of P. Therefore, designing the structure of metal phosphides by regulating the structure of the metal–organic framework (MOF) precursor is an important method to optimize the performance of catalysts. Herein, we prepared a P-doped FeNi compound by utilizing a low-temperature phosphating bimetallic organic framework, which was grown on an NiFe foam (NFF) using terephthalic acid and 2-methylimidazole as ligands through a hydrothermal method. Compared to monometallic phosphides, bimetallic phosphides have shown excellent electrocatalytic performance. The overpotential of P-FeNi@NFF was only 194 mV for the oxygen evolution reaction at a current density of 10 mA cm−2. In addition, the overall water splitting (OWS) performance of P-FeNi@NFF was analyzed. A current density of 10 mA cm−2 could be achieved with a cell voltage of 1.59 V, and the OWS process could continue for at least 27 h at a high current density of 500 mA cm−2. Its excellent catalytic performance was mainly attributed to the excellent conductivity of the phosphide catalyst on the conductive substrate. Additionally, the lattice distortion resulting from a lattice mismatch between Ni2P and Fe2P could accelerate electron transfer, thus greatly improving the intrinsic activity of the catalyst.
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 SOLID STATE CHEMISTRY
·
2023
·
IF 3.3
Zhimin He,Zhengjie Tan,Yu Pu,Qiyu Li,Wei Hong,Rong Li,Xinglong Gou
Ti 3 C 2 T x nanosheets arrays sandwiched with FeNi 2 S 4 nanoparticles are in-situ grown on Ni-Fe foam (FeNi 2 S 4 -Ti 3 C 2 T x @NFF) via a facile one-pot hydrothermal route. The as-prepared FeNi 2 S 4 -Ti 3 C 2 T x @NFF exhibits simultaneously excellent catalytic activity towards oxygen and hydrogen evolution reactions with low overpotentials (136 and 97 mV at 10 mA cm -2 , respectively) and superior stability. Moreover, a symmetrical electrolyzer utilizing FeNi 2 S 4 -Ti 3 C 2 T x @NFF as the anode and cathode only requires 1.51 V for overall water splitting to reach 10 mA cm -2 , and can continuously operate at 20 mA cm -2 for 100 h. The outstanding catalytic performance of the catalyst can be attributed to increased active sites in the well-dispersed FeNi 2 S 4 nanoparticles, enhanced electronic conductivity due to introduction of Ti 3 C 2 T x nanosheets, strong electronic coupling between Ti 3 C 2 T x and FeNi 2 S 4 , improved mass transfer through the hierarchically porous structures and robust self-supporting configuration.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Dingdiao Mo,Guoxiang Chen,Jiaxing Zhang,Zhiwei Xiang,Chao Huang,Weitong Cai,Jie Cui,Wei Su
Designing low-cost, efficient, and durable bifunctional electrocatalysts can significantly reduce the cost of industrial electrolysis of water. In this article, a novel self-supported nickel–iron foam completely covered with Ni 2 B particles was prepared through a solid-phase boronization method as the substrate (referred to as NFF-B). Then, an independent columnar Co-doped NiSe electrocatalyst composed of petal-shaped nanosheets was synthesized on NFF-B via a stirring-electrodeposition method. For comparison, a series of reference samples were also synthesized using the same process. The synthesized Ni 0.5 Co 0.5 Se/NFF-B exhibited excellent bifunctional catalytic activity and stability, with an HER overpotential of 90 mV and an OER overpotential of only 182 mV in 1 M KOH at 10 mA‧cm −2 . More importantly, the assembled Ni 0.5 Co 0.5 Se/NFF-B||Ni 0.5 Co 0.5 Se/NFF-B overall water splitting system required only 1.49 V to drive the electrolysis of water at 10 mA‧cm −2 , maintaining exceptional stability for 115 h under these conditions, surpassing most previously reported bifunctional electrocatalysts. Our work offers a new strategy for preparing efficient and durable bifunctional electrocatalysts.
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
·
2022
·
IF 9.965
Jia Wang,Yu Jiang,Chunbo Liu,Yuanyuan Wu,Bo Liu,Wei Jiang,Hongji Li,Guangbo Che
Evidence shows that self-supported electrocatalysts are crucial role to solving environmental and energy issues. In this study, self-supported 2D metal–organic framework (MOF) nanosheets grown in situ on nickel–iron foam (NFF) were prepared by a one-step solvothermal process. The hierarchical nanostructure possesses a high specific surface area and abundant metal sites, which are beneficial for electrocatalytic reactions. In the electrocatalytic oxygen evolution reaction (OER), the optimal NiFe(20Ni)-MOF/NFF can drive current densities of 10, 50 and 100 mA cm −2 at small overpotentials of 226, 277 and 294 mV, respectively. According to the characterization results, the OER performance is improved by the synergistic action of bimetals and the generation of hydroxides/oxyhydroxides. This work provides new insights into fabricating self-supported MOF-based electrodes for water splitting that are simple and highly efficient.
研究领域:
材料科学
·
电化学
·
能源材料
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）