JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Tengfei Zhang,Dan Xu,Ping Liu,Long Chen,Wen Guo,Tiantian Gu,Feng Yu,Yanyan Liu,Gang Wang
The development of economical, efficient, and durable bifunctional catalyst for overall water splitting is an attractive and challenging task. Herein, a novel defect-rich 2D/2D heterostructure is constructed by vertically growing S-doped NiMoO 4 (NiMoO 4 -S) nanosheets on nickel sulfide (Ni 3 S 2 ) nanosheet arrays supported on nickel foam (NF) using a two-step hydrothermal method. Benefiting from the hierarchical sheet-on-sheet heterogeneous nanostructure and abundant oxygen vacancies for more active sites, efficient electronic/mass transfer, and fast gas release, the synthesized NiMoO 4 -S/Ni 3 S 2 /NF electrode exhibits excellent electrocatalytic performance for HER (η 10 mA cm −2 = 107 mV) and OER (η 50 mA cm −2 = 285 mV). The alkaline water electrolyzer with NiMoO 4 -S/Ni 3 S 2 /NF as the positive and negative electrodes can provide a current density of 10 mA cm −2 with the potential of 1.52 V, which is below that of the commercial Pt||RuO 2 /NF system or many other reported systems. More importantly, the alkaline water electrolyzer offers a current density of 100 mA cm −2 at 1.85 V with outstanding durability of over 50 h. This research points to a promising route in designing transition metal-based bifunctional electrocatalysts for large-scale energy conversion 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
Nano Research
·
2023
·
IF 9.9
Yue Meng,He Xun,Sun Shengjun,Sun Yuntong,Hamdy Mohamed S.,Benaissa Mhamed,Salih Alsamani A. M.,Liu Jun,Sun Xuping
Developing efficient and durable oxygen evolution reaction (OER) catalysts holds great promise for green hydrogen production via seawater electrolysis, but remains a challenge. Herein, we report a Co-doped Ni 3 S 2 nanosheet array on Ni foam (Co-Ni 3 S 2 /NF) as a high-efficiency OER electrocatalyst for seawater. In alkaline conditions, Co-Ni 3 S 2 /NF requires an overpotential of only 368 mV to drive 100 mA·cm −2 , superior to Ni 3 S 2 /NF (385 mV). Besides, it exhibits at least 50-h continuous electrolysis.
研究领域:
材料科学
·
电化学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Yi Ma,Huan Ge,Yong Zhang,Ning Jian,Jing Yu,Jordi Arbiol,Canhuang Li,Yue Zhong,Luming Li,Hui Kang,Jun Wang,Andreu Cabot,Junshan Li
The electrocatalytic oxidation of small organic molecules, such as ethylene glycol (EG), can be paired with the hydrogen evolution reaction (HER) to effectively lower the overall cell voltage, thereby enhancing energy efficiency for hydrogen production. Moreover, the anodic EG oxidation reaction (EGOR) can generate valuable C1 and C2 compounds, offering a sustainable approach to greener chemical production. The industrial viability of this process requires nonprecious metal electrocatalysts that demonstrate high performance at low potential and exhibit high selectivity. In this study, we report on a cost-effective electrocatalyst based on a nickel sulfide phase (Ni3S2) heterogeneously nucleated on the surface of nickel–iron-manganese layered double hydroxide (NiFeMn-LDH) nanosheet arrays and supported on nickel foam (NF), demonstrating exceptional activity for the coupled HER and EGOR in alkaline conditions. This Ni3S2@NiFeMn-LDH/NF catalyst achieves an EG-to-formate faradaic efficiency of up to 90% at 1.5 V, with glycolate and oxalate as minor byproducts. Density functional theory calculations reveal that the EGOR was facilitated by the phase-separated Ni3S2, which lowers the energy barrier of the rate-limiting step. This work presents a promising, sustainable pathway for hydrogen production alongside value-added chemical generation from the electrooxidation of EG.
研究领域:
电化学
·
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Shaobo Ye,Zhentao Du,Zhengxiang Cai,Deliu Ou,Haonan Guo,Qiao Liu,Weiyou Yang,Qing Shi
Molybdenum disulfide (MoS2), a typical earth-abundant material, is an excellent candidate for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), which fundamentally rely on the regulation of the morphology and electronic structure of MoS2. Herein, Mn-doped amorphous MoS2 coated on Mn-doped crystalline Ni3S2 nanorods (Mn–Ni3S2@MoS2), rationally designed core–shell nanorods, have been fabricated via a facile one-step hydrothermal method as highly efficient bifunctional activities for HER and OER in alkaline solution. The target electrodes deliver a high current density of 100 mA cm–2 at a low overpotential of 187 and 310 mV for HER and OER, respectively, outperforming most MoS2-based catalysts. Moreover, a water-splitting cell based on the Mn–Ni3S2@MoS2 electrode requires a voltage of 1.45 V to reach a current density of 10 mA cm–2, which is superior to the state-of-the-art one of those based on noble metal Pt/C–NF∥RuO2–NF and non-noble metal catalysts. The overall enhanced bifunctional catalytic performance is mainly attributed to the abundant catalytically active sites provided by the Mn-doped amorphous MoS2 and the fast pathway for electron/proton transfer facilitated by the Mn-doped crystalline Ni3S2 nanorods. The incorporated Mn dopants and assembled Ni3S2/MoS2 heterostructure effectively regulate the electronic structure with redistributed charge within the core–shell Mn–Ni3S2@MoS2 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
INORGANIC CHEMISTRY COMMUNICATIONS
·
2019
·
IF 1.795
Yayun Zheng,Yunrui Tian,Huaiping Zhang,Qingping Guo,Jujie Luo
Electrode materials with graphite flake layer structure decorated with nickel oxide and nickel sulfide nanoparticles (NiO/Ni 3 S 2 ) have been prepared by one-pot microwave method. When NiO/Ni 3 S 2 @graphite synthesized by microwave is compared with NiO@graphite electrode, the former obtains a high capacitance of 768 F g −1 at 1 A g −1 , exceeding 72% (446 F g −1 at 1 A g −1 ) of the latter. After 1000 cycles of the NiO/Ni 3 S 2 @graphite electrode, the specific capacitance remained at 692 F g −1 (at 1 A g −1 ) with a capacitance retention of 90%. Furthermore, NiO/Ni 3 S 2 @graphite and active carbon electrodes could be assembled into asymmetric supercapacitor (ASC), which exhibited a specific capacitance of 68.5 F g −1 at 1 A g −1 in 6 M KOH solution. The NiO/Ni 3 S 2 @graphite//AC ASC also showed a relatively high energy density of 28.86 Wh kg −1 , maximum power density of 0.77 kW kg −1 , and exceptional cycling stability (80% retention after 2000 cycles).
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
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IF 7.489
Jiao-Jiao Duan,Ru-Lan Zhang,Jiu-Ju Feng,Lu Zhang,Qian-Li Zhang,Ai-Jun Wang
Developing cost-effectiveness and superior electrocatalysts is crucial to improve the efficiency of oxygen evolution reaction (OER) in water splitting system. Hence, flower-like phosphorus doped Ni 3 S 2 /CoFe 2 O 4 arrays (P-Ni 3 S 2 /CoFe 2 O 4 /NF) were generated on three-dimensional (3D) nickel foam (NF) via the two-step hydrothermal treatment and subsequent phosphorization. Additionally, a series of control experiments were conducted to investigate the formation mechanism. By virtue of the unique 3D configurations and multi-compositions, the as-prepared catalyst exhibited greatly improved OER performance in 1.0 M KOH solution, with the overpotential of only 254 mV at 50 mA cm −2 and low Tafel slope of 54.43 mV dec −1 . This study provides a feasible approach for preparing advanced electrocatalyst in energy conversion and storage devices.
研究领域:
材料科学
·
电催化
·
能源转换与存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Research
·
2021
·Vol. 15
·期 4
·2987-2993
·
IF 8.897
Zhang Yufeng,Zhu Wei,Fang Jinjie,Xu Zhiyuan,Xue Yanrong,Liu Di,Sui Rui,Lv Qingqing,Liu Xuerui,Wang Yongsheng,Chen Wei,Zhuang Zhongbin
Electrochemical upgrading of biomass ethanol to value-added chemicals is promising for sustainable society. Here, we synthesize defective Ni 3 S 2 nanowires (NWs), which show high activity towards electrochemical oxidation of ethanol to acetate. The Ni 3 S 2 NWs are formed by the oriented attachment mechanism, and rich defects are introduced during the growth. A low onset potential of 1.31 V and high mass activity of 8,716 mAmg Ni −1 at 1.5 V are achieved using the synthesized Ni 3 S 2 NWs toward the ethanol electro-oxidation, which are better than the Ni(OH) 2 NWs and the Ni 3 S 2 nanoparticles (NPs). And the selectivity for the acetate generation is ca. 99%. The high activity of Ni 3 S 2 NWs is attributed to the easier oxidation of Ni(II) to the catalytically active Ni(III) species with the promotion from S component and rich defects. These results demonstrate that the defective NWs can be synthesized by the oriented attachment method and the defective Ni 3 S 2 NWs structure as the efficient non-noble metal electrocatalysts for oxidative upgrading of ethanol.
研究领域:
材料科学
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电化学
·
可再生能源
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2023
·
IF 5.3
Li Luo,Shantang Liu,Hanyu Li,Bingquan Xia
Direct methanol fuel cells (DMFCs) have captured increasing attention as promising renewable energy devices. The development of innovative, cost-effective electrocatalysts with superior performance for the methanol oxidation reaction (MOR) holds great significance in promoting DMFCs. In this study, a facile dealloying–electrodeposition method was employed to fabricate stereospecific Ni3S2 nanoflowers on a three-dimensional nanoporous CuAg substrate (Ni3S2@CuAg) for accelerating MOR. The nanoporous CuAg alloy substrate was prepared by dealloying of the metallic glassy (MG) alloy precursor, and the Ni3S2 nanoflowers were in situ grown on the nanoporous CuAg skeleton through a simple electrodeposition process. The novel Ni3S2@CuAg catalysts exhibit outstanding catalytic performance for MOR owing to their preeminent conductivity, large specific surface area, and abundant active reaction sites. Notably, the optimal Ni3S2@CuAg-10 exhibited a superior current density of 340.5 mA cm–2 at 1 V along with good stability (93% current density retention after 2 h) in 1 M KOH and 1 M CH3OH solution. This work presents a novel strategy for designing electrocatalysts with high efficiency and durability for MOR.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2025
·
IF 5.3
Jingjing Zhu,Yuying Feng,Jia hui Jiang,Tingting Huang,Juan Xiao,Qihao Wu,Guancheng Xu,Li Zhang
In recent years, the technology of electrocatalytic water splitting for hydrogen production has garnered significant interest. Nonetheless, the kinetics associated with the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are comparatively sluggish, thereby constraining the enhancement of water decomposition efficiency to a certain degree. In this paper, the Ni3S2-MoS2/ NF semicoherent heterostructure interface electrocatalyst with multistage nanosheet was synthesized by the hydrothermal method. At the material level, the structure adeptly incorporates a semicoherent interface with a multilayer nanosheet configuration. This design not only preserves the nanosheet morphology of the precursor but also facilitates the formation of folded nanoflowers, thereby increasing the active surface area and promoting the rapid transfer of electrons. Furthermore, it optimizes the electronic environment of the electrode through interface charge redistribution, thereby diminishing the adsorption of H by the strong S–H bonds and accelerating the reaction kinetics. Additionally, the structure achieves optimal lattice matching, which enhances ion diffusion and reduces the associated diffusion barrier. In a 1.0 M KOH solution, the catalyst showed excellent performance in both the OER and HER. In situ Raman spectroscopy demonstrated that Ni–OOH serves as the true active site for the OER. This study provides a new idea for the precise design of bifunctional HER and OER electrocatalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Yekai Zhang,Shuai Wang,Hong Zhong,Xin Ma,Zhanfang Cao
Exploring low-cost and high-efficiency OER catalysts is still a challenge. In this paper, self-supporting catalyst-Ni 3 S 2 @FeCrMoS x /NF was prepared using metal organic frameworks as templates. The morphology of the pre-catalyst has been deeply restructured after the sulfidation reaction, which significantly changes the composition and catalytic performance of the catalyst. The overpotential of Ni 3 S 2 @FeCrMoS x /NF is only 144 mV and 241 mV at a current density of 10 and 50 mA cm −2 respectively, the Tafel slope is as low as 45 mV dec −1 . And it can maintain good electrochemical stability at a high current density of 100 mA cm −2 . The outstanding OER performance of Ni 3 S 2 @FeCrMoS x /NF can be attributed to the increase of electrochemical surface area after sulfidation, the synergistic effect among multi-metals and the synergistic effect of polymetallic sulfides generated by sulfidation.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
·
2022
·
IF 0.847
Zhaoyang An,Hui Xue,Jing Sun,Niankun Guo,Tianshan Song,Jiawen Sun,Yi-Ru Hao,Qin Wang
Integrating the advantages of anion vacancies and heterostructures into the catalytic materials may increase the binding affinities to intermediates, provide more active sites, and significantly promote the activity of overall water splitting. However, the successful assembly of anion vacancies and heterostructures for high-efficiency water splitting performance is still challenging. In this work, we ingeniously present the co-construction of sulfur vacancies and heterogeneous interface into Ni 3 S 2 /MoS 2 catalysts on nickel foam (NF). The introduction of sulfur vacancies and Ni 3 S 2 /MoS 2 heterostructures can significantly improve electron and ion transport, effectively improve structural stability, and enhance overall water splitting activity. The obtained V S -Ni 3 S 2 /MoS 2 catalysts (V S stands for sulfur vacancies) exhibit superior OER and HER activities, and the overpotentials for OER and HER are 180 and 71 mV at 10 mA·cm −2 , respectively. Furthermore, a low water splitting voltage of 1.46 V is required at 10 mA·cm −2 for the V S -Ni 3 S 2 /MoS 2 catalysts, which is considerably lower than most that of water splitting electrocatalysts currently reported. This work offers an effective mean for the preparation of catalysts with both anion vacancies and heterostructures for achieving high-performance alkaline overall water splitting.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Wenjing Wang,Haobo Shi,Haoyang Huang,Hongying Liu,Chengxiang Li,Yongsheng Han
Hydrogen peroxide is a green oxidizing chemical with wide applications in industry. Its production heavily relies on the industrial anthraquinone process, which involves a large number of organic pollutants, challenging green and sustainable development. The recently developed pulsed electrochemical approach holds great potential for the green synthesis of hydrogen peroxide, but it is limited by the absence of highly efficient catalysts. Here, we report a strategy to improve the performance of Ni3S2 catalyst by tuning the content of Ni3+ species. The Ni3S2 catalyst exhibits good performance in oxygen evolution and oxygen reduction processes at the same time, leading to the formation of hydrogen peroxide. The enrichment of Ni3+ ensures the adsorption of reaction intermediates *O, *OH, and *OOH and promotes electron transfer during the reaction, thus facilitating hydrogen peroxide generation. By tuning the Ni3+ ratio in the Ni3S2 catalyst, the productivity of hydrogen peroxide was enhanced. The prepared hydrogen peroxide was used for propylene oxidation, resulting in pH-dependent products. This study highlights the significance of the design and rational synthesis of electrochemical catalysts for synthesizing hydrogen peroxide, which may be used for the electrochemical synthesis of chemicals.
研究领域:
材料科学
·
电化学
·
绿色化学
✓ 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）