Advanced Energy Materials
·
2018
·Vol. 9
·期 1
·1803035
·
IF 21.875
Peng Ge,Sijie Li,Laiqiang Xu,Kangyu Zou,Xu Gao,Xiaoyu Cao,Guoqiang Zou,Hongshuai Hou,Xiaobo Ji
As a result of its high-energy density, metal–selenides have demanded attention as a potential energy-storage material. But they suffer from volume expansion, dissolved poly-selenides and sluggish kinetics. Herein, utilizing' thermal selenization via the Kirkendall effect, microspheres of NiSe 2 confined by carbon are successfully obtained from the self-assembly of Ni-precursor/PPy. The derived hierarchical hollow architecture increases the active defects for sodium storage, while the existing double N-doped carbon layers significantly alleviate the volume swelling. As a result, it shows ultrafast rate capability, delivering a stable capacity of 374 mAh g −1 , even after 3000 loops at 10.0 A g −1 . These remarkable results may be ascribed to the Ni O C bonds on the interface of NiSe 2 and the carbon film, which leads to the faster transfer of ions, the effective trapping of poly-selenide, and the highly reversible conversion reaction. The kinetic analysis of cyclic voltammetry (CV) demonstrates that the electrochemical process is mainly dominated by pseudocapacitive behaviors. Supported by the results of electrochemical impedance spectroscopy (EIS), it is confirmed that the solid–electrolyte interface films are reversibly formed/decomposed during cycling. Given this, this elaborate work might open up a potential avenue for the rational design of metal-sulfur/selenide anodes for advanced battery systems.
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
·
2020
·
IF 6.182
Danyang He,Liyun Cao,Yixuan Huang,Guodong Li,Yongqiang Feng,Yajuan Zhao,Xiaoyi Li,Dongming Li,Liangliang Feng
Tailoring the nonprecious nickel selenide heterogeneous electrocatalysts with controllable morphology and electronic structures is of prime importance to enhance the catalytic efficiency for hydrogen production evolution (HER). Here, we report the solvothermal in-situ synthesis of vanadium-incorporated NiSe/Ni 3 Se 2 heterogeneous structures (VNS) on porous nickel foam, which function as an efficient electrode toward HER, together with superior catalytic activity and durability. Impressively, the self-assembled VNS electrode delivers the current densities of 100, 500 and 1000 mA cm −2 at quite low overpotentials of 175, 275 and 348 mV with 85% iR -compensation toward HER in 1.0 M KOH solution. Mott-Schottky analysis indicates that the vanadium doping alters the flat band potential of VNS, and in turn affects the electrons migration behavior at electrode and electrolyte interface. Benefiting from its dramatically increased catalytic active sites exposure, enhanced charge transport capability, and optimized electronic structure, the hierarchical VNS heterostructures exhibit an impressive HER electrocatalytic performance in alkaline media. More broadly, this research provides a promising strategy for design and exploitation of more advanced electrocatalysts for large-scale hydrogen production on selenides using heteroatom vanadium incorporation.
研究领域:
材料科学
·
电化学
·
可再生能源
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2020
·
IF 3.807
Min Zhu,Qing Yan,Qi Lu,Yanqin Xue,Yongde Yan,Jinling Yin,Kai Zhu,Kui Cheng,Ke Ye,Jun Yan,Dianxue Cao,Guiling Wang
Strengthening electrical conductivity and multiple atomic interaction are benefit for improving activity of oxygen evolution reaction (OER). Herein, we synthesized Fe-Doped NiSe 2 nanospheres distribute on reduced graphene oxide sheets (Ni 0.7 Fe 0.3 Se 2 /rGO). The optimum ratio (30%) of rGO was ascertained by comparing the properties of catalysts with different rGO amounts. In alkaline electrolyte , the Ni 0.7 Fe 0.3 Se 2 /rGO-30% owns the better OER performance than those of Ni 0.7 Fe 0.3 Se 2 and NiSe 2 , ascribed to the unique architecture that Ni 0.7 Fe 0.3 Se 2 nanospheres decorate rGO. In the architecture, the rGO matrix increases conductivity, enlarges transfer rate of ions and electrons and promotes dispersion of Ni 0.7 Fe 0.3 Se 2 . In addition, multiple atomic interaction of Ni/Fe atoms and the synergistic effect between the Ni 0.7 Fe 0.3 Se 2 and rGO enable the compound to be an efficient OER catalyst. Through the rational analysis, Ni 0.7 Fe 0.3 Se 2 /rGO-30% hybrid is promising as an effective non-noble metal catalyst for OER application.
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
·
2019
·
IF 4.175
Hong-Bo Wang,Yang-Shuo Sun,Fei Ma,Liang Zhou,Hui-Feng Li,Long Zhang,Guan-Jun Chen,Yi-Ku Xu,Yong-Nan Chen,Ke-Wei Xu,Da-Yan Ma
Well-arranged heterogeneous interface is favored to enhance the electrocatalytic activities to utilize the synergistic effects of different crystalline phases. In this work, vertical aligned single crystal Ni 3 Se 2 nanowires (NWs) wrapped by ultra-thin NiSe nanoflakes (NFs) with well-arranged heterogeneous interfaces along axial direction were successfully in situ grown on nickel foam (Ni foam) by a simple one-step hydrothermal method without posttreatment. The growth of Ni 3 Se 2 NWs follows a surface reaction mechanism by which NiSe reacts with reactive Ni · atoms on surface lattice steps of Ni 3 Se 2 nucleuses to grow both along radial and axial directions. The configurations of the products can be tuned from NiSe NFs to the core-shell NWs dominated structures by solely modulating Se molarity in chemical precursors motivated by the accelerated reaction kinetics. The hydrogen evolution reaction (HER) performance was improved with the increase of Se molarity attributing to the increased coverage of high aspect Ni 3 Se 2 /NiSe core-shell NWs arrays, metallic conductive feature of Ni 3 Se 2 skeleton and well-arranged heterogeneous interfaces along the axial direction. The Ni 3 Se 2 /NiSe core-shell NWs with well-arranged heterogeneous interfaces may also be beneficial to other energy or environmental 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
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Zonghua Pu,Yonglan Luo,Abdullah M. Asiri,Xuping Sun
In this contribution, we demonstrate that electrodeposited nickel diselenide nanoparticles based film on conductive Ti plate (NiSe2/Ti) is an efficient and robust electrode to catalyze both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in basic media. Electrochemical experiments show this electrode affords 10 mA cm–2 at HER overpotential of 96 mV and 20 mA cm–2 at OER overpotential of 295 mV with strong durability in 1.0 M KOH. The corresponding two-electrode alkaline water electrolyzer requires a cell voltage of only 1.66 V to achieve 10 mA cm–2 water-splitting current. This development provides us an attractive non-noble-metal catalyst toward overall water splitting applications.
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
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Danyang He,Liyun Cao,Jianfeng Huang,Yongqiang Feng,Guodong Li,Dan Yang,Qingqing Huang,Liangliang Feng
Developing highly efficient and cost-effective non-noble metal electrocatalysts with prominent operational stability toward hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is indispensable for large-scale water electrolysis but remains challenging. Here, an innovative superhydrophilic vanadium-modulated Ni3Se2 nanorod@nanosheet array in situ grown on nickel foam (V-Ni3Se2/NF) is synthesized via a solvothermal strategy employing a NiV-LDH nanosheet as a precursor. Experimental investigations disclose that the hierarchical nanostructure endows V-Ni3Se2/NF with abundant electrochemically surface active sites that render the easy accessibility of the electrolyte to the electrode, thereby enhancing the electron transfer efficiency and electrocatalytic activity toward HER and OER. Furthermore, the modulated electronic configuration in V-Ni3Se2/NF not only favors the water dissociation and formation of adsorbed hydrogen but also optimizes the binding energy of key reaction intermediates, thus expediting the water electrolysis kinetics. Consequently, the V-Ni3Se2/NF electrode requires ultralow overpotentials of 275 and 370 mV at a large current density of 500 mA cm–2 in 1.0 M KOH solution toward HER and OER, respectively. The assembled V-Ni3Se2/NF||V-Ni3Se2/NF electrolyzer yields a low cell voltage equaling to 1.56 V to deliver 10 mA cm–2 together with an extraordinary long-term durability for 80 h, far outperforming the benchmark Pt/C/NF||IrO2/NF counterpart (1.76 V, 10 mA cm–2), demonstrating its glorious potentials in large-scale industrial water electrolysis applications. This work puts forward novel synergistic tactics to construct bifunctional electrocatalysts with prominent water splitting performance in a harsh alkaline electrolyte.
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
·
2025
·
IF 8.3
Jueshuo Fan,Lisha Shen,Chenglin Zhao,Zhida Wang,Zhiming Tu,Jiaxuan Hu,Changfeng Yan
With the growing global demand for clean energy, water electrolysis for hydrogen production is seen as an efficient method for generating clean energy. The interface between two phases possesses special catalytic activity due to large lattice mismatches and strain concentration. It's a challenge to precisely tailor the multiphase interfaces of catalysts. Herein, the phase interface of NiSe–NiSe 2 was precisely controlled through a hydrothermal method. NiSe 2 crystals are uniformly distributed on NiSe nanosheets and form heterojunction structures. This uniformly distributed interfaces significantly improve the catalyst's Hydrogen evolution reaction (HER) performance, achieving an overpotential of only 32 mV and a Tafel slope of 39.83 mV dec −1 at 10 mA cm −2 in 1 M KOH. The dual-phase interface induces electronic reconfiguration and the elevated d-band center of Ni, resulting in selective adsorption of H∗ and non-adsorption of H 2 O and OH − at the interface, which facilitates H∗ adsorption and H 2 desorption, thereby creating numerous rapid hydrogen evolution channels. Additionally, an anion exchange membrane water electrolyzer was assembled using NiSe–NiSe 2 as the cathode, which achieved a current density of 1 A cm −2 at 1.92 V in a 1 M KOH solution. This approach of introducing a special hydrogen evolution interface through composite dual-phase structures is promising for future low-energy, high-efficiency water electrolysis for hydrogen production.
研究领域:
材料科学
·
能源化学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Fangqing Wang,Xueru Zhao,Ying Li,Limin Liang,Kotaro Sasaki,Qiuyan Hao,Wenhao Yuan,Sijia Li,Hui Liu
Transition-metal selenides exhibit excellent catalytic activity towards oxygen evolution reaction (OER), but suffering from serious performance degradation due to the surface reconstruction during OER. Herein, we found that the incorporation of Ag single atoms in NiSe 2 electrocatalyst (Ag SA -NiSe 2 ) could suppress the surface reconstruction, improving both catalytic activity (179 mV@10 mA cm −2 ) and stability (500 h @ ∼100 mA cm −2 ) for OER in 1.0 M KOH. The aberration corrected transmission electron microscope and X-ray absorption structure analysis reveal the co-existence of the Ag single atoms and Se vacancies in NiSe 2 matrix. In-situ Raman spectroscopy demonstrates that the introduction of single-atom Ag and Se vacancies in NiSe 2 successfully inhibits the formation of NiOOH species on the surface during OER, accounting for the excellent stability. The theoretical calculation result indicates that the Ag single atom and Se vacancies in NiSe 2 synergistically optimizes the adsorption/desorption of OER intermediates, boosting the intrinsic activity.
研究领域:
材料科学
·
电催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2025
·
IF 3.5
Hongzhi Wang,Xiangcheng Shen,Weiguo Zhang,Suwei Yao
The synthesis of low-cost transition metal bifunctional electrocatalysts that can replace noble metals is crucial for realizing high efficiency hydrogen production from industrial water splitting. Herein, a novel binder-free amorphous/crystalline NiFeS@Ni 0.85 Se bifunctional electrocatalyst material has been fabricated on nickel foam (NF) via a straightforward two-step electrodeposition method. The electrode features a unique structure in which NiFeS nanosheets of uniform size grow on Ni 0.85 Se microspheres, thus providing more active sites. It exhibits a minimal overpotential of 63 mV at 10 mA cm −2 for hydrogen evolution reaction (HER) and 311 mV at 100 mA cm −2 for oxygen evolution reaction (OER). Impressively, when assembled into an electrolytic cell, the electrocatalyst can reach 10 mA cm −2 at just 1.51 V and remains stable for 220 h. Additionally, at 1.68 V, the catalyst reaches 50 mA cm −2 and maintains stable operation for 140 h, demonstrating outstanding water splitting potential. This paper presents a composite material that combines the crystalline and amorphous states, allowing them to complement each other and jointly promote catalytic performance.
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 Materials Chemistry A
·
2017
·Vol. 5
·期 28
·14639-14645
·
IF 8.867
Qiang Zhao,Dazhong Zhong,Lin Liu,Dandan Li,Genyan Hao,Jinping Li
Electrochemical hydrogen production through water splitting is one of the most promising methods for the storage and utilization of renewable energy. However, it is hindered by the sluggish oxygen evolution reaction (OER). Therefore, there is an urgent need to develop an efficient and robust OER catalyst through a simple and low-cost method. Herein, we report the in situ fabrication of amorphous Fe–NiSe/NF without a polymeric binder as a three-dimensional (3D) nanowire electrode for efficient water oxidation. It shows good durability in 1 M KOH. This catalyst requires overpotentials of only 233 and 275 mV to drive current densities of 10 and 100 mA cm−2, and it shows a low Tafel slope of 48 mV dec−1. The faradaic efficiency of Fe–NiSe/NF for oxygen evolution was determined to be close to 96.8%.
研究领域:
材料科学
·
电化学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Chao Cai,Yaqun Mi,Shaobo Han,Qi Wang,Wei Liu,Xiaoqiang Wu,Zhi Zheng,Xiang Xia,Liang Qiao,Weilie Zhou,Xiaotao Zu
Surface modification of nanostructured catalysts is fundamental in accelerating sluggish oxygen evolution reaction (OER). Herein we demonstrate that nanostructured Nickel Selenide (NiSe2) exhibits excellent capability for OER owing to the high compatibility between (200) plane and alkaline solution. The dendrite-like nickel selenide achieves a specific current density of 10 mA/cm 2 at an overpotential low to ∼299 mV. The NiSe2 has high stability, in which overpotential decreased ∼2 mV after 10 000 cycles. We demonstrated that the catalytic efficiency of OER could be promoted by increasing the exposure ratio of (200) plane. This work discloses that kinetics of OER are related to specific facets exposure, in which it opens up the possibility of designing active and stable catalysts for OER utilization.
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 MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
He Zhou,Jingrui Hou,Limin Zhang,Dezhi Kong,Hui Wang,Longhui Zeng,Zhiwei Ren,Tingting Xu,Ye Wang
Despite the rapid advances in electrocatalysts based on two-dimensional (2D) transition metal dichalcogenides (TMDs) materials, they are subject to serious aggregation, poor conductivity and the presence of inactive basal planes. Herein, we have successfully demonstrated the in-situ construction of NiSe 2 –MoSe 2 heterostructure arrays on carbon cloth (NiSe 2 –MoSe 2 /CC) by a facile two-step hydrothermal process. The presence of the synergistic effect in the heterostructures effectively optimizes the poor conductivity and hydrophilicity, and thus enables fast electron transfer, leading to enhanced electrochemical reaction. Furthermore, density functional theory calculations reveal that the electrons redistribution at the heterojunction interface and the reduced Gibbs free energy of hydrogen adsorption for hydrogen evolution reaction (HER)/the Gibbs free energy change value of rate-determining step for oxygen evolution reaction (OER), thus enhancing the HER/OER catalytic activity. Importantly, the device displays a good performance with a low overpotential of 98 and 310 mV for HER and OER, respectively, and a low cell voltage of 1.59 V for its corresponding electrolyzer (10 mA cm −2 ). This work presents the high-performance water splitting of bifunctional electrocatalysts based on 2D TMDs materials and offers a novel design concept of interface engineering.
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）