APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Yafeng Chen,Heliang Yao,Fantao Kong,Han Tian,Ge Meng,Shuize Wang,Xinping Mao,Xiangzhi Cui,Xinmei Hou,Jianlin Shi
Oxygen evolution reaction (OER) is a pivotal electrochemical reaction process for many renewable energy technologies. Due to the sluggish OER kinetics, searching for efficient low-cost non-precious metal catalysts is one of the crucial but very challenging steps. Herein, V 2 C MXene synergistically coupled with hypophosphite-intercalated FeNi (oxy)hydroxide (H 2 PO 2 − /FeNi-LDH-V 2 C) electrocatalyst is synthesized. The H 2 PO 2 − /FeNi-LDH-V 2 C exhibits excellent OER performance with an overpotential of 250 mV (η 10 ) and small Tafel slope of 46.5 mV dec −1 in 1.0 M KOH electrolyte, and excellent rechargeable Zn-air battery performance with superior open circuit potential (1.42 eV), power density (137 mW cm −2 ) and well durability. The strong interaction and electronic coupling with prominent charge-transfer between FeNi-LDHs and V 2 C MXene endow the composite significant OER performance and structural stability, and the adsorption/desorption balance for the OER reaction pathway, eventually promoting the intrinsic activity. This work demonstrates the great promise of MXene-based nanohybrids as advanced electrocatalysts for renewable energy applications.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yi-fan Zhang,Xue-wei Wang,Zi-yu Zheng,Wen-hua Zhang,Xuan Liu,Jia-qian Niu
In response to the growing demand for clean, green, and sustainable energy sources, the development of cost-effective and durable high-activity overall water splitting electrocatalysts is urgently needed. In this study, the heterogeneous structure formed by the combination of FeCoNiP and FeNi-LDH was homogeneously dispersed onto CuO nanowires generated by in-situ oxidation of copper foam as a substrate using an electrodeposition method. This multilevel structure exhibits excellent bifunctional properties as an electrode material in alkaline solutions, for the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) only 206 mV and 147 mV overpotentials are needed to achieve a current density of 100 mA cm −2 respectively. Full water electrolysis is thus enabled to take place at such a low cell voltage as 1.64 V to reach the current density of 100 mA cm −2 , which exhibits a long-term stability of 30 h. These improved electrocatalytic performances stem from the construction of multilevel structures. The X-ray photoelectron spectroscopy suggests that strong electron transfer occurs between heterogeneous structures, thus facilitating the OER and HER process. The dispersion of CuO nanowires not only increases the electrochemically active surface areas but also improves the overall hydrophilic and aerophobic properties. This work highlights the positive effect of multilevel structure in the design of more efficient electrocatalysts and provides a reference for the preparation of other low-cost, high-activity bifunctional electrocatalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Xian Wang,Ze Qin,Jinjie Qian,Liyu Chen,Kui Shen
Developing low-cost but efficient electrocatalysts for continuous oxygen evolution reaction (OER) at ampere-level current densities can promote the hydrogen economy. LDHs are promising electrocatalysts to replace noble-metal-based catalysts for efficient OER, and rationally constructing LDH-based heterostructures can further boost their OER activities. Herein, we report the anchoring of FeNi-LDH nanoflakes onto MOF-derived carbon nanotube (CNT) networks on carbon cloth to obtain the self-supported LDH/CNT/CC. Benefiting from the advantages of its CNT network and the highly-active sites of its three-layer heterostructure, the optimized LDH/CNT/CC only requires a low overpotential of 200 mV at 10 mA cm −2 and exhibits robust stability under continuous electrolysis for 160 h at an ampere-level current density of 1 A cm −2 . Theoretical calculations show three-layer FeNi-LDH(001)/graphene(002)/Co(111) slab has the lowest OER energy barrier, and its graphene layer can gain electrons from the FeNi-LDH and Co to show the most suitable binding strength for intermediates to facilitate OER.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2023
·
IF 5.4
Xiao Jia,Yingying Wang,Junlei Tang,Kaikai Song,Hailong Zhang,Bing Lin,Hongpeng Zheng
Water electrolysis is a promising sustainable technology for hydrogen production . To achieve large-scale commercialization, electrocatalysts must meet specific performance requirements, such as low cost, high durability, and the ability for high-yield and high-quality production on a macroscopic scale. This study focuses on the preparation of self-supported electrodes for water splitting using stainless steel (SS) as the conductive carrier of the catalytic electrode. In alkaline conditions, FeNi-LDH@Ni films were grown on the surface of stainless steel, resulting in efficient and stable electrodes (FeNi-LDH@Ni/SS). The electrodes exhibited low overpotentials of 399 mV and 212 mV for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively, to reach a current density of 10 mA cm −2 . Amplified electrodes with a surface area of 1 dm 2 were tested in an industrial environment of 6 M KOH at 60 °C. The two-electrode alkaline water electrolyzers (AWE) composed of the two FeNi-LDH@Ni/SS electrodes demonstrated excellent stability for 100 h and required only 1.744 V to reach a current density of 10 mA cm −2 . This study provides insight into the development of stable, efficient, and low-cost electrodes for industrial water splitting applications.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Liming Yang,Tao Yang,Enhui Wang,Xiangtao Yu,Kang Wang,Zhentao Du,Sheng Cao,Kuo-Chih Chou,Xinmei Hou
Aiming to design and prepare non-noble metal electrocatalysts for hydrogen production at high current density (HCD), NiCoP@FeNi LDH hierarchical nanosheets were deposited on nickel foam progressively using a hydrothermal-phosphorization-electrodeposition process. For hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), NiCoP@FeNi LDH/NF requires only 195 and 230 mV overpotentials to reach 1000 mA cm −2 , respectively. For overall water splitting, only 1.70 V is required at 1000 mA cm −2 . This is the largest value for non-noble metal-based electrocatalysts reported so far at HCD. The hierarchical structure exhibits good electron transport capability and the porous-macroporous structure enhances the gas release rate, resulting in enhanced hydrogen production at HCD. Especially, the synergistic effect of NiCoP and FeNi LDH contributes to the adsorption-desorption equilibrium of intermediate radicals during the reaction process and ultimately enhances the catalytic activity. This work provides useful direction for industrial-scale hydrogen production applications at HCD.
研究领域:
材料科学
·
电化学
·
催化
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2021
·Vol. 9
·期 1
·146-154
·
IF 6.569
Hanzhi Yu,Yaoyi Xie,Liming Deng,Hongjiao Huang,Junnan Song,Deshuang Yu,Linlin Li,Shengjie Peng
Developing hierarchical heterostructures as bifunctional electrocatalysts which promote renewable hydrogen production is a desirable but challenging technology in electrochemical water splitting. Herein, the interface engineering of the FeNi2Se4-FeNi LDH composite is achieved by the in situ growth of FeNi LDH nanosheets and the subsequent partial selenization treatment. Enhanced mass transfer and accelerated gas release are achieved in such a unique self-supported hierarchical heterostructure during overall water splitting. Moreover, the strong electronic interaction between FeNi2Se4 and FeNi LDH optimizes the electron redistribution of Fe and Ni sites, which significantly improves the interfacial reactivity of reactants and/or intermediates with the hybrid catalyst. Benefiting from increased active sites and enhanced intrinsic activity, the hybrid electrocatalyst requires only a potential of 205 mV for the oxygen evolution reaction (OER) and a potential of 106 mV for the hydrogen evolution reaction (HER) to realize 10 mA cm−2. Specifically, the optimized FeNi2Se4-FeNi LDH as a bifunctional electrode in overall water splitting delivers 10 mA cm−2 at a low cell voltage of 1.56 V driven by a solar cell. This strategy by rational design of heterostructures thus paves an efficient pathway to fabricate active and non-precious bifunctional electrocatalysts for overall water splitting.
研究领域:
材料科学
·
电化学
·
能源材料
·
催化
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Liqin Zhou,Wanting Su,Yiran Wang,Yifan Liu,Jiguang Deng,Xiaoping Liu,Zhongxing Zhao,Zhenxia Zhao
Micro/nanoplastics (NPs) have become a new ever-growing threat to the safety of ecosystems and human health. Their efficient capture through porous materials adsorption remains insufficiency to meet practical application requirements. Herein, we propose a sponge-like adsorption strategy for boosting NPs capture in aqueous solution via a novel semi-flexible FeNi-layered double hydroxides (Fe T Ni-LDH) microstructure engineered self-assembly using variable-valence doping approach. Highly-density Fe 3+ is successfully implanted into Ni-LDH through skillful Fe variable-valence (Fe 2+ /Fe 3+ ) doping. With the aid of electrostatic and hydrogen attraction, the rigid LDH nano-sheets are assembled into flexible nano-petals spheres with retractable structures. This Fe T Ni-LDH would be stretched and opened up to adsorb large amounts of NPs via unique sponge-like behavior, and achieve an order of magnitude increase in adsorption capacity (3490 mg·g - 1 ) compared state-of-the-art adsorbents. Moreover, in natural water system, Fe T Ni-LDH is also proved to a removal efficiency exceeding 90 % N-NPs and a significant decrease of the metal ions, broadening its applications in polluted water system. Interestingly, its semi-flexible structure would shrink back to its original petal-like spheres after NPs removal, showing high reproducible cycling performance. The semi-flexible structure design provides a smart sponge-like adsorption strategy for boosting NPs capture.
研究领域:
环境科学
·
材料科学
·
水污染治理
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Yue Wang,Weimin Liu,Han Qin,Baoning Wang,Xiangming Wang,Yang Zhao,Feng Yan,Bo Geng,Yujin Chen,Xianbo Yu
Developing efficient, durable non-noble bifunctional electrocatalysts is key for overall water splitting. Herein, we present a hierarchical FeNi LDH/SnS 2 heterojunction array integrating cation vacancy engineering with heterointerface construction. The multilevel architecture comprises a conductive carbon cloth skeleton, SnS 2 nanosheet scaffolds, and cation-vacancy-rich FeNi LDH nanosheets. Vacancies modulate the electronic structure of FeNi LDH, while the heterointerface induces directional electron transfer to SnS 2 . Density functional theory calculations reveal elevated density of states near the Fermi level and optimized d -band center for balanced intermediate adsorption/desorption. Consequently, the cation-vacancy-rich FeNi LDH/SnS 2 electrode achieves outstanding bifunctional activity in alkaline media, with overpotentials of only 100 mV (hydrogen evolution reaction) and 197 mV (oxygen evolution reaction) at 10 mA cm −2 . An overall water splitting electrolyzer requires just 1.52 V to reach 10 mA cm −2 and operates stably over 140 h, surpassing Pt/C||IrO 2 . This work offers an effective strategy for designing high-performance bifunctional electrocatalysts.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Mengyuan Huang,Chengcheng Dai,Zhanling Liu,Renyu Zhang,Yuchuan Zhou,Yu Zhong,Jun Wang,Yaping Zhang,Jinchao Li,Xiaofeng Zhu,Yongfa Zhu
The anion exchange membrane water electrolysis (AEMWE) offers a promising prospect for large-scale hydrogen electro-generation. Nevertheless, current AEMWE is still criticized by large overpotentials and poor anti-reverse current capability of the anodic oxygen evolution reaction (OER). The key challenge lies in tailoring adsorption evolution mechanism (AEM) to lattice oxygen mechanism (LOM), thereby circumventing the overpotential limitation caused by inherent scaling relationship. Here, we designed and fabricated a flexible CC-NCNTs-FeNi catalyst by integrating a hydrophobic carbon nanotube network with hydrophilic FeNi layered double hydroxides (LDH) on carbon cloth (CC), with the interface-induced formations of N-doped LDH and Fe/Ni single-atomic sites. Within lab-made AEMWE setups, the catalyst achieves unprecedented OER performance, rendering 100 mA cm −2 with an overpotential of 250 mV for 100 h. Meanwhile, interface-induced atom exchange endows the catalyst with catalytic multi-functionality, enabling a superior robustness for anti-reverse currents in on-off cycling. The in-situ characterizations and theoretical simulations collectively confirm that N-doping modulates Ni 3 d band center and enhances Ni-O covalency, thus favoring a transition from AEM to LOM-dominated pathway for OER.
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 15
·2640
·
IF 5.719
Liming Yang,Tao Yang,Yafeng Chen,Yapeng Zheng,Enhui Wang,Zhentao Du,Kuo-Chih Chou,Xinmei Hou
The development of bifunctional electrocatalysts with efficient oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is still a key challenge at the current stage. Herein, FeNi LDH/V2CTx/nickel foam (NF) self-supported bifunctional electrode was prepared via deposition of FeNi LDH on V2CTx/NF substrate by hydrothermal method. Strong interfacial interaction between V2CTx/NF and FeNi LDH effectively prevented the aggregation of FeNi LDH, thus exposing more catalytic active sites, which improved electrical conductivity of the nanohybrids and structural stability. The results indicated that the prepared FeNi LDH/V2CTx/NF required 222 mV and 151 mV overpotential for OER and HER in 1 M KOH to provide 10 mA cm−2, respectively. Besides, the FeNi LDH/V2CTx/NF electrocatalysts were applied to overall water splitting, which achieved a current density of 10 mA cm−2at 1.74 V. This work provides ideas for improving the electrocatalytic performance of electrocatalysts through simple synthesis strategies, structural adjustment, use of conductive substrates and formation of hierarchical structures.Keywords:V2CTxMXene;layered double hydroxide;nanohybrids;overall water splitting
研究领域:
电化学
·
材料科学
·
能源材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Jieyu Zhang,Qianwei Chen,Sichen Wang,Xingyu Bai,Zhongchuang Liu,Jiangxiong Deng,Dongyu Wang,Yanmou Shao,Shu-Juan Bao
Active, stable, and low-cost alkaline oxygen evolution reaction (OER) catalyst is essential for large-scale hydrogen (H 2 ) production via electrochemical water splitting. Traditional catalyst design often relies on experience-driven, trial-and-error approaches, limits exploration efficiency. To overcome this, we present an artificial intelligence (AI)-assisted high-throughput framework combining large language models (LLMs)-based literature mining and Python-driven simulations. LLMs identifies FeNi-layered double hydroxide (FeNi-LDH) has excellent activity for OER while Python-based simulations propose a needle-like facilitate bubble detachment. In our experimental, the as-prepared FeNi-LDH exhibits good OER activity (237 mV at 10 mA cm −2 ). After growing FeNi-LDH on NiTe array, the needle-like FeNi-LDH-NiTe not only delivers enhanced activity (198 mV at 10 mA cm −2 ), but also exhibits faster bubble generation and migration, which allow it to stably work at high current density (1 A cm −2 ). The successful AI-guided catalyst design proposes a clear strategy to decouple kinetic and non-kinetic optimization for exploring excellent electrocatalyst.
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Yue Zhao,Yingshi Zhu,Kangting Li,Yanfei Wei,Yuru Li,Tao Yu,Jianqiu Zhu,Xingwang Zhang
During the electro-Fenton (EF) process, the in-situ activation of H 2 O 2 at the cathode is an important strategy to minimize the ineffective consumption of H 2 O 2 and enhance the reaction efficiency. Accordingly, a structurally ordered FeNi-layered double hydroxide (FeNi-LDH) nanosheet array was in-situ grown on carbon felt (CF) by a simple hydrothermal method. A Fe 2+ -based aliovalent substitution strategy was employed to modulate the morphology and active sites of FeNi-LDH. On one hand, Fe 2+ facilitated the formation of abundant open reactive microspaces by regulating the nucleation rate, which was conducive to the exposure of active sites and the mass transfer process. On the other hand, the aliovalent substitution of Fe 2+ introduced more low-valent metal sites and surface defects (–OH), thereby activating the in-plane metal sites of FeNi-LDH. As a result, the bifunctional Fe(II)-FeNi-LDH/CF-0.5 cathode exhibited an excellent performance. At a low current density of 5 mA cm −2 and with NFX concentrations up to 40 mg L −1 , the EF system removed 92.59% of NFX within 15 min, with a pseudo-first-order kinetic constant of 11.67 × 10 −2 min −1 . As the dominant reactive species, hydroxyl radicals (•OH) originated from the combined contributions of both homogeneous and heterogeneous catalytic pathways. The density functional theory (DFT) calculations further revealed that the abundant surface hydroxyl groups were conducive to the adsorption and activation of H 2 O 2 . This work provides a novel material option for EF systems.
✓ 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）