MOLECULES
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2022
·Vol. 27
·期 21
·7617
·
IF 4.927
Xiaodong Fang,Xiangguo Wang,Ling Ouyang,Longcheng Zhang,Shengjun Sun,Yimei Liang,Yongsong Luo,Dongdong Zheng,Tairan Kang,Qian Liu,Feng Huo,Xuping Sun
The development of efficient electrochemical seawater splitting catalysts for large-scale hydrogen production is of great importance. In this work, we report an amorphous Co-Mo-B film on Ni foam (Co-Mo-B/NF) via a facile one-step electrodeposition process. Such amorphous Co-Mo-B/NF possesses superior activity with a small overpotential of 199 mV at 100 mA cm−2for a hydrogen evolution reaction in alkaline seawater. Notably, Co-Mo-B/NF also maintains excellent stability for at least 24 h under alkaline seawater electrolysis.Keywords:amorphous Co-Mo-B film;alkaline seawater electrolysis;hydrogen evolution reaction
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganics
·
2023
·Vol. 11
·期 4
·170
·
IF 2.9
Zikang Lu,Rikai Liang,Yuqi Shao,Weiju Hao
Achieving high−efficiency and stable hydrogen evolution from water splitting is a great challenge. Herein, a facilely prepared two−dimenssional self−supported catalytic electrode with excellent stability is constructed for large−scale hydrogen production from alkaline simulated seawater. The bifunctional catalytic electrode is prepared by a fast and mild one−step of sodium borohydride etching on a nickel foam (NF) substrate without adding other additives (NF@NiBx−3h). The overpotential of the hydrogen/oxygen evolution reaction (HER/OER) in alkaline−simulated seawater at 10 mA cm−2is 96 mV and 261 mV. At 200 mA cm−2, the NF@NiBx−3h electrode shows good stability over 7 days throughout the water splitting process due to the corrosion resistance of the NF substrate, and strong adhesion between the Ni−B active material and the substrate. This work demonstrates a novel strategy for fabricating catalytic electrodes with high−performance, low cost and excellent stability.Keywords:mild and fast construction;chemical etching;HER;OER;industrial−grade water splitting
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 15
·5718
·
IF 4.6
Xiya Yang,Xun He,Lang He,Jie Chen,Longcheng Zhang,Qian Liu,Zhengwei Cai,Chaoxin Yang,Shengjun Sun,Dongdong Zheng,Asmaa Farouk,Mohamed S. Hamdy,Zhaogang Ren,Xuping Sun
Seawater electrolysis has great potential to generate clean hydrogen energy, but it is a formidable challenge. In this study, we report CoFe-LDH nanosheet uniformly decorated on a CuO nanowire array on Cu foam (CuO@CoFe-LDH/CF) for seawater oxidation. Such CuO@CoFe-LDH/CF exhibits high oxygen evolution reaction electrocatalytic activity, demanding only an overpotential of 336 mV to generate a current density of 100 mA cm−2in alkaline seawater. Moreover, it can operate continuously for at least 50 h without obvious activity attenuation.Keywords:hierarchical CuO@CoFe-LDH nanoarray;alkaline seawater electrolysis;oxygen evolution reaction
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
Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Liu Shujie,Zhang Zhiguo,Dastafkan Kamran,Shen Yan,Zhao Chuan,Wang Mingkui
Active and stable electrocatalysts are essential for hydrogen production from alkaline water electrolysis. However, precisely controlling the interaction between electrocatalysts and reaction intermediates (H 2 O*, H*, and *OH) remains challenging. Here, we demonstrate an yttrium-doped NiMo-MoO 2 heterogenous electrocatalyst that efficiently promotes water dissociation and accelerates the intermediate adsorption/desorption dynamics in alkaline electrolytes. Introducing yttrium into the NiMo/MoO 2 heterostructure induces lattice expansion and optimizes the d -band center of NiMo alloy component, enhancing water dissociation and H* desorption. Yttrium doping also increases the concentration of oxygen vacancies in MoO 2−x , which in turn accelerates the charge kinetics and the swift evacuation of *OH intermediates from the active sites. Consequently, the Y-NiMo/MoO 2−x heterostructure exhibits notable performance by requiring only 189 and 220 mV overpotentials to achieve current density of 2.0 A cm −2 in alkaline water and seawater, respectively. This work provides a strategy to modulate heterostructure catalysts for scalable, economically viable hydrogen production from low-quality waters.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY & FUELS
·
2022
·
IF 4.654
Cheng Lan,Heping Xie,Yifan Wu,Bin Chen,Tao Liu
Electrochemical seawater splitting using efficient HER (hydrogen evolution reaction) and OER (oxygen evolution reaction) electrocatalysts have become an appropriate method for the mass production of green hydrogen. In this study, a noble-metal free OER electrocatalyst consisting of Mo-doped Ni3S2 nanocluster arrays on Nickle foam (Mo–Ni3S2/NF)─fabricated using a modified one-step solvothermal approach─is developed and evaluated. The proposed electrocatalyst demonstrates exceptional OER activity, requiring overpotentials of only 212 and 291 mV to deliver OER current densities of 10 and 100 mA cm–2, respectively, in alkaline seawater. The presence of Mo promotes Ni–S coordination, resulting in strong electronic interactions and substantially enhanced OER kinetics. Meanwhile, surface sulfate ions and (oxy)hydroxide (NiOOH) generated during the OER lead to enhanced activity and corrosion resistance, enabling Mo–Ni3S2/NF to operate continuously at 100 mA cm–2 for 500 h in alkaline natural seawater. This study is expected to inform the progression of sulfur-based transition-metal electrocatalysts for seawater oxidation.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Energy & Fuels
·
2022
·Vol. 6
·期 24
·5521-5530
·
IF 6.813
Dongxue Guo,Mengya Zong,Zhe Zhao,Cunzheng Fan,Danhong Wang
Seawater electrolysis under alkaline conditions represents a sustainable approach to the mass production of carbon-neutral hydrogen energy. However, the lack of efficient electrocatalysts restricts the development of this technology. Herein, core–shell-structured NiMoO4@NiFe LDH arrays with simultaneous interface and reconstruction engineering are reported as an efficient OER electrocatalyst for alkaline seawater electrolysis. The catalyst's open and hierarchical architecture, along with the excellent synergistic effects, allows for abundant active sites, high intrinsic activity and effective charge transfer. Specifically, it only required low overpotentials of 251 and 349 mV to attain current densities of 100 and 500 mA cm−2, respectively, along with impressive long-term durability over 80 h and nearly 100% faradaic efficiency. Various ex situ and in situ techniques substantiate the deep reconstruction behavior of the electrocatalyst, including fast dissolution of MoO42− anions and in situ generation of active NiFeOOH species. This work highlights that interface and reconstruction engineering are efficient strategies to fabricate advanced OER electrocatalysts.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2023
·
IF 9.9
Tang Jie,Sun Shengjun,He Xun,Zhang Hui,Yang Chaoxin,Zhang Min,Yue Meng,Wang Hefeng,Sun Yuntong,Luo Yonglan,Alfaifi Sulaiman,Farouk Asmaa,Hamdy Mohamed S.,Sun Xuping,Wang Huiqing,Ying Binwu
The development of highly efficient and durable oxygen evolution reaction (OER) catalysts for seawater electrolysis is of great importance for applications. Here, an amorphous FeMoO 4 nanorod array on Ni foam is reported as a highly active OER electrocatalyst in alkaline seawater, requiring only overpotentials of 303 and 332 mV to achieve 100 and 300 mA·cm −2 , respectively. Moreover, it shows strong long-term electrochemical durability for at least 50 h.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
RENEWABLE ENERGY
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2024
·
IF 9
Qian Zhang,Weijia Guo,Yushan Yang,Shunyu Shen,Xin Chen,Kai Shao,Zhenjie Wang,Qingfeng Sun,Caicai Li
Highly active, stable and affordable hydrogen evolution reaction (HER) electrocatalysts are intensively needed for global energy conversion systems. Carbon-supported ruthenium (Ru)-based electrocatalysts have been rising stars in recent years and the pursuit of higher activity has arisen intensive research interest. Herein, a novel electrocatalyst with cellulose nanofibers containing abundant carboxyls and hydroxyls as the carbon source to anchor Ru nanoparticles (Ru/NC) was designed and synthesized. Benefiting from the anchoring and dispersion of the carbon substrate to the Ru nanoparticles and the synergistic interaction between the different components, the obtained Ru/NC exhibited optimal HER activity in all the corresponding contrast electrocatalysts, with low overpotentials of 16 mV, 22 mV, and 46 mV to attain 10 mA cm − - 2 in 1.0 M KOH, 0.5 M H 2 SO 4 and 1.0 M KOH + seawater, respectively. Further, the Tafel slope of Ru/NC in alkaline seawater indicated that its HER process followed a Volmer-Tafel mechanism. Additionally, the synthesized Ru/NC also displayed excellent stability in different electrolytes. This work will provide a novel and interesting insight into the fabrication of advanced carbon-supported electrocatalysts with resource-rich biomass as cost-effective carbon source.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2024
·
IF 14
Yuwen Hu,Meilian Tu,Tuzhi Xiong,Yanxiang He,Muhammad Mushtaq,Hao Yang,Zeba Khanam,Yongchao Huang,Jianqiu Deng,M.-Sadeeq Balogun
Lattice-strain engineering has demonstrated its capability to influence the electronic structure and catalytic performance of electrocatalysts. Herein, we present a facile method for inducing thermal strain in cobalt/molybdenum nitride rod-shaped structures (denoted Co/Mo 2 N) via ammonia-assisted reduction, which effectively modulating the HER performance. The optimized Co/Mo 2 N-500, characterized by 3% tensile lattice strain, demonstrates exceptional HER activity with lower overpotentials of 140 mV and 184 mV at high current density of 1000 mA cm −2 in alkaline freshwater and seawater electrolytes, respectively. Co/Mo 2 N also exhibits excellent long-term durability even at a high current density of 300 mA cm −2 , surpassing its counterparts and benchmark Pt/C catalyst. Density functional theory calculations validate that the tensile strain optimizes the d -band states, water dissociation, and hydrogen adsorption kinetics of the strained Mo 2 N in Co/Mo 2 N, thereby improving its catalytic efficacy. This work provides valuable insights into controlling lattice strain to develop highly efficient electrocatalysts towards advanced electrocatalytic applications.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
Catalysts
·
2023
·Vol. 13
·期 6
·924
·
IF 3.9
Li Xu,Yuxuan Dong,Wei Xu,Wen Zhang
Preparing high-performance electrocatalysts for oxygen evolution reaction (OER)s with high durability for seawater electrolysis is of great significance. Herein, reported a one-step solution-immersion synthesis strategy to prepare a (Ni/Fe/Mo)OOH catalyst on a nickel foam substrate that can be accomplished in 5 min under ambient temperature and pressure. The unique cluster morphology of the catalyst on the surface of electrodes effectively increases the number of active sites, and the presence of Mo, Ni, and Fe in the catalyst enhances the activity of the OER. In the electrolyte solution (1 mol/L NaOH), the electrode exhibited low OER overpotentials of 265 mV, 286 mV, and 332 mV at currents of 100 mA·cm−2, 400 mA·cm−2, and 1000 mA·cm−2, respectively. This electrode also demonstrated excellent performance in seawater splitting, and the overpotentials at currents of 100 mA·cm−2, 400 mA·cm−2, and 1000 mA·cm−2in alkaline seawater environments were 330 mV, 416 mV, and 514 mV, respectively. In the 72 h durability test, the voltage increase was within 10 mV, exhibiting the excellent durability of the (Ni/Fe/Mo)OOH electrocatalyst. Therefore, the electrode developed here shows potential in the application of seawater electrolysis for hydrogen generation.Keywords:oxygen evolution reaction;(Ni/Fe/Mo)OOH catalyst;ultrafast and facile synthesis;alkaline seawater electrolysis
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
·
2025
·
IF 6.3
Meng Song,Jinbo Wang,Xiao Zhang,Jinxue Guo
Seawater electrolysis to produce hydrogen and oxygen is an attractive candidate for renewable energy, but bottlenecks still remain to develop efficient and stable electrocatalysts. Herein, the N-doped carbon enveloped CoP hierarchical core-shell structured nanoarray is fabricated on carbon fiber cloth through a controllable approach. Scanning electron microscope and transmission electron microscope reveal the nanoarray architecture and core-shell structure of CoP@NC. When tested as bifunctional catalysts toward water electrolysis, the sample demonstrates efficient catalysis performances with low HER overpotentials of 136/139 mV and OER overpotentials of 238/244 mV to generate a current density of 100 mA cm −2 in alkaline water/seawater, respectively. The two-electrode system of CoP@NC/CC= |CoP@NC/CC needs low cell voltage of 1.68 V to yield 100 mA cm −2 in alkaline seawater, which can maintain the performance for over 100 h. The charming hierarchical core-shell structure, appropriate components, and specific nanoarray morphology are synergistically responsible for the good electrocatalysis performances.
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
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Chaojie Lyu,Jiarun Cheng,Kaili Wu,Jiwen Wu,Ning Wang,Zhonglu Guo,Pengfei Hu,Woon-Ming Lau,Jinlong Zheng
Interface engineering is an effective strategy to regulate surface properties and improve the catalytic activities of materials. Here we develop an interface engineered core-shell structure FeP@CoP catalyst, which only requires 50 mV to realize current density of 10 mA/cm 2 with a low Tafel slope of 51.1 mV/dec in 1 M KOH. Density functional theory (DFT) simulations indicate the FeP@CoP interface exhibits optimal H* adsorption energy (0.06 eV) compared with pure-phased CoP (0.26 eV) and pure-phased FeP (−0.18 eV), which is attributed to the significantly electronic structure modulation of Fe and Co atoms at the interface domain. Furthermore, the assembled NiFe LDH@Co 3 O 4 /NF || FeP@CoP/NF electrolyzer only demands the voltages of 1.50 and 1.70 V to achieve 10 and 100 mA/cm 2 under 1 M KOH. The electrolyzer also exhibits considerable catalytic performance in alkaline seawater electrolyte. What's more, it also can be driven by a commercial Si solar panel under AM 1.5 G 100 mW/cm 2 illumination. The regulation of interface-effect paves a novel avenue for constructing high-performance catalysts for hydrogen production .
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
危险品化学品经营许可证（带存储）