COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Xiaoyu Lu,Congling Li,Li Zhang,Wei Xia,Rui Liu,Aifeng Lv
The rational design of efficient, cost-effective, and durable electrocatalysts is crucial for the realization of hydrogen production through water splitting. The present study describes the synthesis of a novel three-dimensional (3D) volcano-like Fe 3 S 4 /Ni 3 S 2 /WO 3 /NiFe LDH/NF (Layered Double Hydroxides/Nickel Foam) electrocatalyst with a highly wrinkled structure through a two-step hydrothermal method. The as-synthesized electrocatalyst exhibits an exceptionally low overpotential of 77 mV for the hydrogen evolution reaction (HER) and 131 mV for the oxygen evolution reaction (OER) at a current density of 10 mA cm −2 , owing to the unique morphology and strong electronic interactions between Fe 3 S 4 , Ni 3 S 2 and WO 3 heterostructures. The Fe 3 S 4 /Ni 3 S 2 /WO 3 /NiFe LDH/NF electrocatalyst demonstrates exceptional performance in overall water splitting when employed as both anode and cathode, achieving a current density of 10 mA cm −2 at an impressively low cell voltage of 1.5 V as well as exhibiting remarkable durability with little degradation over a period of 12 hours. This study presents a straightforward approach for the synthesis of highly efficient and durable non-noble metal catalysts for overall water splitting under hydrothermal conditions.
研究领域:
材料科学
·
电化学
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Materials and Technologies
·
2025
·
IF 9.2
Xinrong Zhao,Meiqi Che,Yaqiong Gong
Hydrogen production from electrolytic water is a promising energy conversion method, which is green, low-carbon and environmentally friendly and it is essential to prepare efficient and low-cost electrocatalysts to improve the efficiency of water electrolysis. In this study, Fe 2 WO 6 @Ni 3 S 2 -WS 2 /NF was successfully synthesized by hydrothermal and electrodeposition methods, and its special nanoflower-like structure and synergistic effect among multi-components resulted in excellent catalytic performance and outstanding stability. The overpotential of Fe 2 WO 6 @Ni 3 S 2 -WS 2 /NF was 170 mV at 10 mA cm −2 in 1.0 M KOH for oxygen evolution reaction (OER) and it remains stable over 100 h, demonstrating its high catalytic activity and stability, making it suitable for prolonged OER processes. The increased activity of Fe 2 WO 6 @Ni 3 S 2 -WS 2 /NF can be attributed to the improved electron transport rate, the exposure of more active sites and the improved conductivity. This study provides a viable method for the preparation of efficient and robust OER catalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2019
·Vol. 25
·期 11
·5485-5494
·
IF 2.289
Wang Xiaoqing,Tian Songran,Zhang Xiaoqing,Li Guoyan,Liu Ying,Chen Botao,Cheng Bowen
A 3D Ni 3 S 2 @Mn-Co-OH/NF cross-linked nanosheet heterostructure composite electrode has been successfully fabricated by a facile two-step hydrothermal method. The as-prepared Ni 3 S 2 @Mn-Co-OH/NF composite electrode exhibits a high capacitance (3163 F g −1 at a current density of 3 mA cm −2 ), a superior rate performance (2071 F g −1 at a current rate of 30 mA cm −2 ), and stable cycling property (maintaining 96.6% of the initial capacitance after 4000 cycles at a current rate of 10 mA cm −2 ). This excellent electrochemical performance can be ascribed to the unique cross-linked nanosheet heterostructure formed directly on Ni foam current collector and the synergistic effect between Mn-Co-OH and Ni 3 S 2 of the composite electrode.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2024
·
IF 2.4
Nazeer Sana,Han Jingwei,Qi Junjie
Due to the fact that fossil fuels are limited and the world’s energy demand is rising, economic catalysts with exceptional stability and efficiency must be produced right now. MoS 2 ’s successfully increased catalytic activity by interfacial coupling and phase engineering. The 1T/2H-MoS 2 /Ni 3 S 2 composite was effectively created in this study by adding Ni 3 S 2 material on top of 1T/2H-MoS 2 (Mo: S = 1:4). The effects of varying concentrations of Ni 3 S 2 on hydrogen evaluation reaction characteristics are examined using the hydrothermal technique. The composite sample with an appropriate amount of Ni 3 S 2 has the best hydrogen evolution performance when compared to samples with other amounts of Ni 3 S 2 . The sample’s overpotential at 1 M KOH is 124 mV at 10 mAcm −2 , and its Tafel slope is 138.0 mVdec −1 . In addition, the sample exhibits good air stability and hydrogen evolution stability. Also, to accelerate the kinetics of hydrogen evolution and encourage H 2 O dissociation in an alkaline environment, Ni 3 S 2 efficiently stimulates MoS 2 ’s inert base surface, creates a rich coupling boundary, and greatly enhances the performance of electrocatalytic hydrogen evolution. Graphical abstract
研究领域:
材料科学
·
电化学
·
催化作用
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Yaohui Gao,Wenjun He,Da Cao,Fangqing Wang,Ying Li,Qiuyan Hao,Caichi Liu,Hui Liu
Designing effective and low-cost bifunctional electrocatalysts for the alkaline hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is essential to achieve green development of the hydrogen economy. Herein, we have developed Mo-doped Ni3S2 nanosheet array catalysts with excellent electrochemical properties. Only 85 mV (HER) and 230 mV (OER) overpotentials are required under alkaline conditions at 10 mA cm–2 and remain undegraded for 100 h. In addition, it only required 1.52 V at 10 mA cm–2 in an alkaline electrolyzer, and it remained unchanged for more than 100 h in stability tests, outperforming most reported electrocatalysts. Experiments and density functional theory (DFT) calculations confirmed that the doping of Mo could expose more active sites of Ni3S2 and optimize the adsorption free energy of the intermediate, which in turn improves its intrinsic activity. This work reveals the key role of Mo in Ni3S2 electrocatalytic performance enhancement at the atomic scale.
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
·
2018
·Vol. 43
·期 5
·2389-2399
·
IF 3.201
Beirong Ye,Chao Gong,Miaoliang Huang,Jinhua Ge,Leqing Fan,Jianming Lin,Jihuai Wu
NiSe rods coated with cotton-like Ni3S2 were directly grown on nickel foam through a two-step process, comprising selenization and electrodeposition. The as-obtained NiSe/Ni3S2 composite electrode exhibited excellent electrochemical properties, with a high specific capacitance of 8.81 F cm−2 (1259.3 F g−1) at a current density of 4 mA cm−2, which was better than the value of pure NiSe electrode (5.17 F cm−2; 861.8 F g−1) at the same current density. Moreover, an asymmetric supercapacitor (ASC) was fabricated using NiSe/Ni3S2 electrode and AC electrode as positive electrode and negative electrode, respectively. This ASC extended the potential window to 1.6 V and was possessed of a superior energy density of 38.7 W h kg−1 at a power density of 192 W kg−1, with outstanding cycling stability (85.9% retention after 10 000 cycles).
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Nano Energy
·
2024
·
IF 16.8
Xueai Teng,Zibo Wang,Yusong Wu,Yu Zhang,Bo Yuan,Yingying Xu,Rongming Wang,Aixian Shan
Interface engineering is verified as an efficient strategy for enhancing the intrinsic activity of transition metal-based electrocatalysts in alkaline hydrogen evolution reaction (HER). Here, the heterostructural MoO 2 /Ni 3 S 2 nanorod arrays fabricated on nickel foam (MoO 2 /Ni 3 S 2 /NF) are produced by a straightforward and effective hydrothermal approach. Benefiting from interfacial effect and self-supported structure, MoO 2 /Ni 3 S 2 /NF electrocatalyst exhibits remarkable HER catalytic properties and durability with a low overpotential of 74.0 mV for achieving a current density of 10 mA cm −2 in 1.0 M KOH, as well as a long-term stability without obvious attenuation. Density functional theory (DFT) calculations reveal electron transfer at the interface domain reduces the energy barrier of the water dissociation step and optimizes H adsorption capability, thereby expediting HER kinetics in alkaline media . This work provides a viable strategy based on interfacial engineering for designing high-efficient HER electrocatalysts .
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
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yunpeng Liu,Ren Zou,Binhao Qin,Jianyun Gan,Xinwen Peng
Water electrolysis is a sustainable strategy for renewable energy conversion and storage that can be replenished by intermittent electricity sources. Despite the decades-long progress, the commercialization of water electrolysis remains fraught with difficulties owing to its high electricity consumption. We couple the hydrogen evolution reaction with the electrooxidation of xylose obtained from regenerated hemicellulose to organic acids, utilizing a bifunctional electrode consisting of Co 9 S 8 /Ni 3 S 2 . The electrochemically activated anodic sites, including Co 2+ /Co 3+ , Co 3+ /Co 4+ , Ni 2+ /Ni 3+ , and Ni 3+ /Ni 4+ redox species, are responsible for xylose electrooxidation, with the required potential reduced by 290 mV at 100 mA cm −2 compared with water oxidation. Moreover, the process yields over 60% towards formic acid at the anode, is accompanied by the production of hydrogen at the cathode. Xylose oxidation is kinetically and thermodynamically more favorable than water oxidation, significantly reducing the overall energy consumption relative to conventional water electrolysis. This study provides a promising strategy for the scalable and energy-efficient process of biomass electrooxidation coupled with hydrogen production.
研究领域:
能源化学
·
电催化
·
可再生能源
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Hui Su,Shaojia Song,Songsong Li,Yangqin Gao,Lei Ge,Weiyu Song,Tianyi Ma,Jian Liu
Rational design of low-cost and efficient electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is imperative for renewable energy conversion. Herein, for the first time, a facile strategy is developed to synthesize M (M = Fe, Cu, Zn, Mo) doped bimetallic sulfide heterostructure Ni 3 S 2 /Co 3 S 4 electrocatalysts. The as-prepared bifunctional Cu-Ni 3 S 2 /Co 3 S 4 electrode exhibits excellent electrocatalytic activity for HER and OER in 1 M KOH electrolyte, and it requires only an overpotential of 79 mV (150 mV) to deliver 10 mA cm −2 (20 mA cm -2 ) current density for HER process. Moreover, it shows a considerable low cell voltage of 1.49 V at the current density of 10 mA cm -2 in a two-electrode configuration which is far surpassing most of the reported bifunctional metal sulfides. Meanwhile, besides increasing the specific surface area of the electrocatalyst by optimizing the microstructure, the introduction of Cu cation could also stimulate the formation of high-valent Ni/Co sites, which can be verified by XPS technique. Density function theory calculations demonstrate that the Cu-doping boosts the formation of high valent Co sites and enhances the charge transfer performance of Ni and Co species, thus promotes intrinsic catalytic activity through modulating the d-band center of Co and reducing the adsorption energy of H and O-containing intermediates (H*, OH*, OOH*) on the surface of the catalyst. This work suggests the importance of exploitation of transition metal ion-doping for promoting the electrocatalytic activity of bimetallic sulfides.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 15
·3885-3897
·
IF 7.779
Kefeng Wang,Bin Li,Jingxiao Ren,Wenxia Chen,Jinhai Cui,Wei Wei,Peng Qu
Water splitting by electricity is believed to be a promising approach to obtain high-purity H2 on a large scale. Highly efficient electrocatalysts are of great importance for the electrocatalytic hydrogen evolution reaction (HER). Herein, we designed a highly efficient electrocatalyst (Ru@Ni3S2) for the HER by immersing Ni3S2 nanorod arrays into a RuCl3 aqueous solution. The obtained Ru@Ni3S2 with an increased electrochemical surface area and a decreased charge-transfer resistance demonstrates an enhanced electrocatalytic performance toward the HER in alkaline media, suggested by an overpotential of −19.8 mV to achieve a current density of 10 mA cm−2 and a Tafel slope of 33.2 mV dec−1. Both the in situ formed Ru nanoparticles and the adsorbed Ru3+ ions are responsible for the electrocatalytic hydrogen evolution reaction. Density functional theory (DFT) calculations reveal that the enhanced electrocatalytic HER activity of Ru@Ni3S2 compared with pure Ru can be ascribed to the lowered water dissociation energy barrier as well as the more favorable adsorption energy for the H intermediate (H*). During the long-term stability test, the adsorbed Ru3+ on the Ni3S2 nanorods would be converted to Ru(OH)3, leading to attenuated electrocatalytic activity. This drawback can be overcome by further surface modification with polyaniline (PANI). The obtained PANI–Ru@Ni3S2 exhibits a comparable catalytic HER activity to Ru@Ni3S2 but an extraordinary stability with continuous electrolysis at a current density of 20 mA cm−2 for 35 hours. Our design strategy here for synthesizing the Ru@Ni3S2 hybrid and effectively improving the stability of Ru-based catalysts could be extended to develop other noble metal/transition metal sulfides for practical water electrolysis and other applications.
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
Small Structures
·
2023
·Vol. 4
·期 11
·2300175
·
IF 15.9
Wenxian Li,Zulin Sun,Riyue Ge,Jiancheng Li,Yiran Li,Julie M. Cairney,Rongkun Zheng,Ying Li,Sean Li,Qian Li,Bin Liu
MoS 2 with 2D structure shows efficient hydrogen evolution reaction (HER) performance because undercoordinated Mo–S edges have ideal hydrogen adsorption free energy. MoS 2 usually does not satisfy the bifunctional catalysts because of the poor intrinsic oxygen evolution reaction (OER) catalytic activity. Herein, it is proposed to construct heterostructure with OER active components to induce efficient bifunctional catalytic activity along with heteroatom doping to modify the electronic structure to optimize the adsorption and desorption capabilities of reaction intermediates. La-doped Ni 3 S 2 /MoS 2 grown on nickel foam (La-NMS@NF) is synthesized as bifunctional catalyst taking advantage of the excellent OER performance of Ni 3 S 2 . La-NMS@NF evolves into nanoflower-like structures with the addition of La dopant, which provides abundant pore channels to facilitate mass transfer and exposure of active sites. Density functional calculations reveal that the La-doped Ni 3 S 2 /MoS 2 heterointerface can optimize the water adsorption and H * adsorption/desorption, improving the HER performance. The La-NMS@NF exhibits an overpotential of 154 and 300 mV for HER and OER at 100 mA cm −2 in 1.0 m KOH. Herein, a heteroatom-driven heterostructure activation strategy for electron rearrangement and structural evolution in electrocatalysts to decrease energy consumption in overall water splitting is demonstrated.
研究领域:
材料科学
·
电化学
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Akhmat Fauzi,Shuo Geng,Fenyang Tian,Yequn Liu,Haibo Li,Yongsheng Yu,Jiaming Li,Weiwei Yang
Interface engineering is an efficient strategy for synthesis of high efficiency catalysts which can combine the advantages of each part for improving the catalytic activity . Herein, we fabricate the heterostructure NiFe-LDH@Ni 3 S 2 by interface engineering through a simple hydrothermal combined with electrodeposition method. Combining the high conductivity of Ni 3 S 2 and high intrinsic OER activity of NiFe-LDH at the interface, the NiFe-LDH@Ni 3 S 2 electrode exhibits a relatively low overpotential of 240 mV for OER at a current density of 200 mA cm −2 which is lower than NiFe-LDH and Ni 3 S 2 . In addition, the overall water splitting unit provides a potential of 1.47 V at 10 mA cm −2 . Furthermore, after 24 h of electrolysis in 1.0 M KOH, the current density remains 98% of the original value. This work paves a new way for synthesis of more heterostructure catalysts.
研究领域:
材料科学
·
电化学
✓ 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）