Science Advances
·
2024
·Vol. 10
·期 20
·
IF 11.7
Huashuai Hu,Zhaorui Zhang,Lijia Liu,Xiangli Che,Jiacheng Wang,Ye Zhu,J. Paul Attfield,Minghui Yang
The ocean, a vast hydrogen reservoir, holds potential for sustainable energy and water development. Developing high-performance electrocatalysts for hydrogen production under harsh seawater conditions is challenging. Here, we propose incorporating a protective V2O3 layer to modulate the microcatalytic environment and create in situ dual-active sites consisting of low-loaded Pt and Ni3N. This catalyst demonstrates an ultralow overpotential of 80 mV at 500 mA cm−2, a mass activity 30.86 times higher than Pt-C and maintains at least 500 hours in seawater. Moreover, the assembled anion exchange membrane water electrolyzers (AEMWE) demonstrate superior activity and durability even under demanding industrial conditions. In situ localized pH analysis elucidates the microcatalytic environmental regulation mechanism of the V2O3 layer. Its role as a Lewis acid layer enables the sequestration of excess OH− ions, mitigate Cl− corrosion, and alkaline earth salt precipitation. Our catalyst protection strategy by using V2O3 presents a promising and cost-effective approach for large-scale sustainable green hydrogen production.
研究领域:
材料科学
·
能源技术
·
催化化学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Yixing Luo,Yang Yang,Yakun Tian,Qingsheng Wu,Wen-Feng Lin,Ming Wen
Transition-metal based layered double hydroxides (TM-LDHs) have attracted widespread attention due to their advantages for the electrocatalytic oxygen evolution reaction (OER). However, their sluggish and unstable reconstruction during the OER has seriously limited their applications in water electrolysis at industrial-level current density. Herein, FeOOH/FeNiCo-LDH heterogeneous nanosheets (2.1 nm in thickness) are uniformly integrated on honeycomb-channel N-doped carbon (FeOOH/FeNiCo-LDH/HCNC) through a self-sacrificing and dual-ion etching strategy. Thermodynamically favoured hydrogen/electron-capturing ability of FeOOH together with kinetically favoured rapid mass/electron transfer efficiency of conductive HCNC collaboratively accelerates the reconstruction of FeNiCo-LDH to generate highly active and stable FeNiCoOOH species, which displays an optimal reaction pathway with reduced energy barrier for the OER. Consequently, FeOOH/FeNiCo-LDH/HCNC exhibits superior OER activity in both alkaline freshwater (η10 = 258 mV with Tafel slope of 32.4 mV dec−1) and alkaline natural seawater (η10 = 296 mV with Tafel slope of 54.7 mV dec−1). When applied in anion exchange membrane electrolyzer as OER electrocatalyst, FeOOH/FeNiCo-LDH/HCNC achieves outstanding stability with low cell-voltage increase rates of 1.7 mV h−1 (freshwater) and 1.5 mV h−1 (seawater) over 120 h at the industrially required current density of 500 mA cm−2. This study proposed an ingenious reconstruction strategy for advanced TM-LDH electrocatalysts toward industrial 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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Shaolong Yang,Jinxin An,Xianbo Xiang,Zhitao Han,Xinxiang Pan
Seawater electrolysis is an attractive way to generate hydrogen energy . However, to commercialize this technology, it has been focused on developing chlorine-less oxygen generating electrodes for decades. Here, different from common ideas of minimizing chlorine formation at the anode, we aimed at reusing the waste chlorine from seawater electrolysis to mitigate nitrogen oxide (NOx) emissions. NOx removal performance of electrolyzed seawater containing chlorine was investigated under 254 nm ultraviolet (UV) irradiation in a semi-continuous bubbling reactor. Comparative parametric experiments were conducted for each factor with and without UV irradiation. Significant contributions of UV irradiation on denitrification performance of chlorine were observed under all investigated conditions. A ten-folder improvement in denitrification efficiency by the UV irradiated electrolyzed seawater was achieved under optimal conditions. Possible free radicals’ reaction mechanisms were discussed preliminarily. Results reveal that UV irradiated electrolyzed seawater is a promising way to reuse electrolyzed chlorine and mitigate acid gas emissions.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Huimin Mao,Xinyue Qu,Hongsheng Ma,Jingqi Chi,Zhenyu Xiao,Yongming Chai,Zexing Wu,Xiaobin Liu,Lei Wang
Seawater electrolysis is undoubtedly a more sustainable alternative to pure water electrolysis at present. However, it is hindered by the relatively slow kinetics of the oxygen evolution reaction and the detrimental effects of chloride ions in seawater that require resolution. In this study, we developed a straightforward synthesis method and successfully prepared FeNiCoMnCr high-entropy oxide (HEO). The strong coupling among multiple 3d orbitals of the transition metals allows for significant regulation of the catalyst’s electronic structure, enabling oxidation and reduction processes at the active site to spontaneously approach an equilibrium state. Additionally, Lewis acid Cr 6+ selectively adsorbs OH − , further enhancing both activity and stability of the catalyst in alkaline seawater. This research provides valuable insights into utilizing HEOs for seawater electrolysis and elucidates the roles of metals within HEOs.
研究领域:
材料科学
·
电化学
·
催化科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Wen-Juan Xu,Sami Ur Rahman,Ying-Yu Wang,Jiang-Yan Dang,Xiao-Ying Zhang,Wen-Liang Li,Jing-ping Zhang
Seawater electrolysis offers a dual benefit of alleviating freshwater scarcity and advancing hydrogen energy technologies. However, its practical implementation is hindered by the complex chemical composition of seawater, particularly the corrosive chloride ions that induce electrode degradation and parasitic chlorine evolution, posing critical challenges to long-term electrolytic stability. To address this issue, we designed an efficient electrocatalyst by introducing vanadium (V) doping and oxygen vacancies (Ov) into nanoflower-structured Co 3 O 4 ( V-Co 3 O 4 (Ov)-250 ) through hydrothermal synthesis and controlled annealing. The Ov configuration modulates electronic structures and facilitates charge transfer, whereas V doping enhances corrosion resistance, increases lattice defects, and generates active sites. This dual modification synergistically improves surface reactivity and conductivity, boosting catalytic performance. V-Co 3 O 4 (Ov)-250 achieves low overpotentials of 69 mV for the hydrogen evolution reaction (HER) and 158 mV for the oxygen evolution reaction (OER) in alkaline freshwater, and 133 mV (HER) and 228 mV (OER) in alkaline seawater at a current density of 10 mA cm −2 . When assembled into an electrolytic cell, the catalyst requires a low voltage of 1.68 V to drive a current density of 100 mA cm −2 in an alkaline seawater electrolyzer, while maintaining outstanding stability over 100 h of continuous operation. This performance surpasses that of most non-precious metal-based electrocatalysts for seawater electrolysis. Theoretical analysis elucidates that V doping promotes preferential adsorption of OH – at the active site and optimizes intermediates’ adsorption–desorption equilibrium through its synergy with Ov, consequently lowering the reaction energy barrier and enhancing intrinsic catalytic activity.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NATURE
·
2022
·Vol. 612
·期 7941
·673-678
·
IF 69.504
Xie Heping,Zhao Zhiyu,Liu Tao,Wu Yifan,Lan Cheng,Jiang Wenchuan,Zhu Liangyu,Wang Yunpeng,Yang Dongsheng,Shao Zongping
Electrochemical saline water electrolysis using renewable energy as input is a highly desirable and sustainable method for the mass production of green hydrogen 1 , 2 , 3 , 4 , 5 , 6 , 7 ; however, its practical viability is seriously challenged by insufficient durability because of the electrode side reactions and corrosion issues arising from the complex components of seawater. Although catalyst engineering using polyanion coatings to suppress corrosion by chloride ions or creating highly selective electrocatalysts has been extensively exploited with modest success, it is still far from satisfactory for practical applications 8 , 9 , 10 , 11 , 12 , 13 , 14 . Indirect seawater splitting by using a pre-desalination process can avoid side-reaction and corrosion problems 15 , 16 , 17 , 18 , 19 , 20 , 21 , but it requires additional energy input, making it economically less attractive. In addition, the independent bulky desalination system makes seawater electrolysis systems less flexible in terms of size. Here we propose a direct seawater electrolysis method for hydrogen production that radically addresses the side-reaction and corrosion problems. A demonstration system was stably operated at a current density of 250 milliamperes per square centimetre for over 3,200 hours under practical application conditions without failure. This strategy realizes efficient, size-flexible and scalable direct seawater electrolysis in a way similar to freshwater splitting without a notable increase in operation cost, and has high potential for practical application. Importantly, this configuration and mechanism promises further applications in simultaneous water-based effluent treatment and resource recovery and hydrogen generation in one step.
研究领域:
能源科学
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材料科学
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化学工程
✓ 已验证
DOI
PubMed
高影响因子
MOLECULES
·
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
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Shiwei Song,Yanhui Wang,Shuyu Zhou,Hongwei Gao,Xueqing Tian,Yungang Yuan,Wei Li,Jianbing Zang
Seawater is more favorable than freshwater in large-scale hydrogen production by electrolysis as it is considered to be the most plentiful natural resource. However, chloride ions with high concentrations in the electrolyte may easily cause corrosion to electrodes or undesirable side reactions during the implementation of seawater electrolysis, thereby degrading the overall system’s efficiency. Therefore, it is necessary to develop an electrocatalyst with excellent catalytic activity and corrosion resistance in order to achieve high-efficiency seawater electrolysis. In this study, a three-dimensional heterogeneous architecture of (FeNi)9S8 nanosheets uniformly decorated with an amorphous MoS2 layer on Ni-Fe foam (MoS2-(FeNi)9S8/NFF) was successfully prepared via one-step hydrothermal vulcanization. Benefiting from the strong interaction at the heterogeneous interface, effective charge transfer, and the enhanced corrosion resistance by MoS2-(FeNi)9S8 coupling, the self-supported MoS2-(FeNi)9S8/NFF electrocatalyst exhibited superior catalytic activity and stability toward overall fresh/seawater splitting. Moreover, it required a low battery voltage of 1.57 and 1.62 V to reach 50 and 100 mA cm–2 in an alkaline natural seawater electrolyte, respectively, and possessed impressive durability up to 72 h, exceeding the pair of Pt/C||IrO2. Accordingly, this study provides a route for the preparation of corrosion-resistant electrocatalysts of hydrogen production by seawater electrolysis.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Wang Jiaqi,Liu Yue,Yang Ganceng,Jiao Yanqing,Dong Youming,Tian Chungui,Yan Haijing,Fu Honggang
Anion exchange membrane seawater electrolysis is vital for future large-scale green hydrogen production, however enduring a huge challenge that lacks high-stable oxygen evolution reaction electrocatalysts. Herein, we report a robust OER electrocatalyst for AEMSE by integrating MXene (Ti 3 C 2 ) with NiFe sulfides ((Ni,Fe)S 2 @Ti 3 C 2 ). The strong interaction between (Ni,Fe)S 2 and Ti 3 C 2 induces electron distribution to trigger lattice oxygen mechanism, improving the intrinsic activity, and particularly prohibits the dissolution of Fe species during OER process via the Ti-O-Fe bonding effectively, achieving notable stability. Furthermore, the good retention of sulfates and the abundant groups of Ti 3 C 2 provide effective Cl - resistance. Accordingly, (Ni,Fe)S 2 @Ti 3 C 2 achieves high OER activity (1.598 V@2 A cm -2 ) and long-term durability (1000 h) in seawater system. Furthermore, AEMSE with industrial current density (0.5 A cm -2 ) and durability (500 h) is achieved by (Ni,Fe)S 2 @Ti 3 C 2 anode and Raney Ni cathode with electrolysis efficiency of 70% and energy consumption of 48.4 kWh kg -1 H 2 .
研究领域:
材料科学
·
电化学
·
可再生能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Zhaolong Wang,Ciwei Wu,Xiaolong Wang,Mingzhu Xie,Yinfeng Li,Ziheng Zhan,Yong Shuai
Ions in seawater hinder direct sewage electrolysis due to the extreme corrosion of Cl − to the anode and reaction of Mg 2+ and Ca 2+ on the cathode producing solid substances, which reduce the electrolytic efficiency. However, traditional desalination consuming fossil fuel with massive CO 2 emissions threatens human survival. Therefore, zero-carbon emission, ultra-durable, large-scale production of freshwater from seawater for water electrolysis is urgently needed. Herein, a multifunctional system for seawater is demonstrated electrolysis based on ultra-durable solar desalination outdoors. The solar evaporators reach an evaporation flux of 1.88 kg m −2 h −1 with a photothermal conversion efficiency of solar energy as high as 91.3% with excellent ultra-durable salt resistance even for saturated saltwater due to the Marangoni effects. Moreover, the condensation of pure water from solar desalination based on the evaporation system reaches 0.54 L m −2 h −1 outdoors, which is suitable for a 20 cm × 20 cm engineered electrode equipped with a Janus membrane powered by a solar panel to produce H 2 outdoors. The ultrafast unidirectional transport of H 2 bubbles enabled by Janus membranes can greatly improve the H 2 production efficiency at a rate approaching 85 mL h −1 for continuous 24 h outdoors.
研究领域:
能源科学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Jue Wang,Zhi Li,Libei Feng,Dachun Lu,Wei Fang,Qinfang Zhang,Daniel Hedman,Shengfu Tong
The development of efficient and stable catalysts for oxygen evolution reaction (OER) in seawater presents a major challenge for hydrogen production through water electrolysis. In this work, we present a stable NiFe foam catalyst with a Se-doped Ni/Fe oxide surface prepared through a combination of chemical vapor deposition and electrochemical exfoliation. This method effectively modifies the surface of the commercial NiFe foam to a rough and stable Se-doped Ni/Fe oxide surface, displaying exceptional OER performance in both freshwater and seawater with more than 54 days stability in natural seawater. Characterizations reveal Ni-Se doped Fe oxide surface, with subsurface layers consisting of Ni alloyed with a moderate concentration of Fe, optimizes the adsorption free energy of oxygen-containing intermediates. Our results demonstrate a surface engineering approach to activate NiFe foam as a robust OER catalyst for seawater electrolysis, which is beneficial for the hydrogen economy and for the environment.
研究领域:
材料科学
·
电化学
·
能源技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 23
·13562-13569
·
IF 12.732
Boran Wang,Mengjie Lu,Duo Chen,Qi Zhang,Wenwen Wang,Yutang Kang,Zhenxing Fang,Guangsheng Pang,Shouhua Feng
Self-supported nickel–iron nitride microsheet arrays coated with carbon are grown on commercial Ni foam (NixFeyN@C/NF) and used as an electrocatalyst for splitting of alkaline seawater. The porous architecture and superhydrophilic/superaerophobic surface ensure sufficient exposure of active sites and mass transfer. The synergetic coupling effect between the carbon coating and NixFeyN facilitates electron transport. The optimal anode (Ni3FeN@C/NF) and cathode (Ni3N@C/NF) electrocatalysts are employed to assemble a two-electrode seawater electrolyzer for overall alkaline seawater electrolysis, which delivers a large current density of 500 mA cm−2 at a low cell voltage of 1.91 V. The superior corrosion-resistance and electron conductivity of the electrocatalyst are responsible for its excellent durability up to 100 hours. This result suggests that transition-metal nitrides coated with carbon offer an effective route to fabricate high-performance and durable hybrid electrocatalysts for hydrogen production from seawater electrolysis.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）