JOURNAL OF POWER SOURCES
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2025
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IF 7.9
Xinyu Wang,Xu Yu,Xiaohai Cui,Pinyi He,Guohui Yang,Fu Qin,Jiawen Shang,Mingxing Zhang,Xiaoyue Wang,Lili Ren
The electrolysis of seawater represents a promising route for sustainable hydrogen production, yet it remains severely hindered by chloride-induced corrosion and competing side reactions at the anode. In this study, we develop a robust NiFe layered double hydroxide (LDH) anode modified with molybdate (MoO 4 2− ) via a simple ion intercalation strategy, which significantly enhances both the activity and durability of the oxygen evolution reaction (OER) in alkaline seawater. Systematic experimental and in-situ spectroscopic analyses reveal that intercalated MoO 4 2− induces electron delocalization around Ni/Fe sites, elevating their oxidation states and facilitating a lattice oxygen-mediated reaction pathway. This electronic modulation not only accelerates OER kinetics but also effectively shields active sites from chloride attack. The optimized NiFe LDH-MoO 4 2- electrode achieves outstanding performance with low overpotentials of 252, 284 and 312 mV at current densities of 100, 500 and 1000 mA cm −2 , respectively, and exhibits remarkable long-term stability for 220 h with 93 % retention. When integrated into a two-electrode seawater electrolyzer, the system requires only 1.65, 1.74 and 1.87 V to deliver 0.5, 1.0 and 2.0 A cm −2 , and operates stably over 180 h. This work offers an effective anti-corrosion engineering strategy, paving the way for industrial-scale seawater electrolysis.
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Journal of Energy Storage
·
2025
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IF 9.8
Chunyan Wu,Qihao Wu,Heju Gao,Feng Wen,Guancheng Xu,Li Zhang
The synergistic integration of multiple active groups and heterostructure engineering play a crucial role in optimizing reaction kinetics and enhancing the intrinsic activity of heterojunction electrocatalysts. Here, a three-phase nanocomposite heterojunction system of CoSe 2 /ZnSe/CoFe was successfully constructed via hydrothermal and selenization methods. Experimental results demonstrate that the designed CoSe 2 /ZnSe/CoFe@NCNTs/CC composite electrode exhibits outstanding bifunctional properties in electrocatalytic performance testing: in the oxygen evolution reaction (OER), it exhibits a low potential of 1.513 V at a current density of 10 mA cm −2 , while in the oxygen reduction reaction (ORR), the half-wave potential is 0.887 V. Further studies indicate that this self-supporting CoSe 2 /ZnSe/CoFe@NCNTs/CC cathode material exhibits outstanding performance in aqueous and flexible zinc-air batteries (ZABs), featuring high power density, excellent specific capacity, and exceptional cycling stability. Its outstanding electrocatalytic performance primarily stems from the following synergistic effects: first, the abundant distribution of active sites, including CoFe alloy with adsorption free energy and nitrogen-doped carbon nanotubes (NCNTs); Second, the multiphase coupled interface formed by the heterojunction between the biphasic selenide and the CoFe alloy, combined with the material's inherent superhydrophobic properties, jointly optimizes the oxygen diffusion kinetics at the three-phase interface. This innovative heterostructure design concept provides new research insights and technical pathways for developing efficient multifunctional electrocatalysts and advanced energy conversion devices.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Zhibo Dong,Hongli Wu,Shuya Wu,Haichen Wan,Xiaolong Chen,Jingjing Wang,Qinglong Xian,Peipei Zhang,Xue Yang,Wei Jia
Efficient water splitting for renewable hydrogen production requires the development of electrocatalysts with high activity and excellent stability. In this study, multi-metal heterostructures were doped with the precious metal ruthenium (Ru) to prepare advanced electrocatalysts with synergistically enhanced catalytic activity for overall water splitting. Using a sacrificial template, heterostructures with abundant active sites were obtained on nickel foam (NF) by room-temperature impregnation, electrochemical synthesis, and low-temperature phosphorization treatment. Structural characterization and in situ Raman spectroscopy results indicated that Ru doping induced lattice expansion in Ni 2 P/Fe 2 P, accelerating the dynamic self-reconstruction of the catalyst during electrocatalysis. This enabled the catalyst to autonomously adjust its structure under different voltage conditions, endowing it with superior stability. Electrochemical evaluations revealed the good overall water splitting capability of the Ru-Ni 2 P/Fe 2 P/NF catalyst, requiring a cell voltage of merely 1.39 V to reach a current density of 10 mA cm −2 . Furthermore, the catalyst exhibited excellent stability and durability. This study highlights the synergistic combination of precious metals and multi-metal heterostructures as a strategy to develop scalable and efficient electrocatalytic platforms.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Biye Niu,Feixiang Gao,Zekun Jing,Taiping Fu,Yufeng Liu,Yakun Guo,Maobing Shuai
In confined environments, hydrogen accumulation presents significant safety hazards, necessitating the development of efficient hydrogen uptake materials. Conventional Pd/C-DEB hydrogen getter is severely compromised by CO poisoning. This study introduces a one-step mechanochemical ball milling approach that integrates Pd/C catalysts with DEB to fabricate a CO-tolerant hydrogen getter. A DEB conversion rate of 75.2 % is achieved under an H 2 atmosphere containing 1 % CO, representing a sixfold improvement over the untreated sample. Ball milling refines Pd nanoparticles, increases surface area, generates multiscale defects, strengthens metal-support interactions, enhances electron transfer, modulates the Pd d-band structure, and reduces CO adsorption energy, thereby exposing more active sites for hydrogen uptake. This approach is also applicable to Pt/C, Rh/C, and other platinum-group metal systems, providing a versatile strategy for designing durable and CO-resistant getters in energy storage and conversion technologies.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
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IF 8.3
Bin Liu,Shiping Chen,Weihao Tan,Hexiang Ma,Lan Yu,Kun Dong,Liangwei Chen,Jinsong Wang,Kangcheung Chan
Developing high-activity electrocatalysts is crucial for the sustainable hydrogen production. This study presents a scalable strategy that combines arc-melted high-entropy alloy (HEA) synthesis with selective acid etching to create a superior catalyst for alkaline hydrogen evolution reaction (HER). The designed Nb 30 Mo 25 V 20 Pt 15 Ir 10 HEA undergoes controlled etching, which selectively removes specific elements to construct a highly active surface with exposing and stabilizing Pt/Ir active sites. The optimized catalyst demonstrates exceptional performance, achieving an ultralow overpotential of 24 mV at 10 mA cm −2 , a Tafel slope of 35.6 mV dec −1 , and remarkable stability in 1.0 M KOH electrolyte. More importantly, it exhibits a superior precious metal mass activity of 0.081 A mg −1 Pt + Ir and a high turnover frequency of 1.14 s −1 at 100 mV, surpassing the commercial Pt/C. Experimental characterization and DFT calculations reveal a synergistic multisite mechanism where Pt sites facilitate optimal H∗ adsorption while Mo–Ir bridge sites modulate surface OH∗ interaction, collectively enhancing the reaction kinetics. This work provides new insights into designing high-performance, cost-effective electrocatalysts through rational HEA engineering and post-synthetic surface modification.
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FUEL
·
2025
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IF 7.5
Xin Zhang,Xiangyun Sun,Li Li,Xinli Zhang,Ao-Bing Wang,Huijuan Xu,Lijun Gao,Yaohui Gao,Hui Liu
Developing low-cost, highly efficient and stable non-noble metal-based electrocatalysts for the hydrogen evolution reaction (HER) is crucial for promoting large-scale alkaline water electrolysis. Here, we report a novel self-supporting Ni(OH) x /Mo-Ni 3 S 2 nanosheet heterostructure grown on nickel foam, demonstrating outstanding catalytic performance for alkaline HER. This heterostructure electrocatalyst exhibits an exceptionally low overpotential of just 33 mV at a current density of 10 mA cm −2 in 1 M KOH solution, surpassing commercial Pt/C catalyst. Moreover, it can operate continuously for 300 h at a high current density of around 130 mA cm −2 . Both experimental and theoretical calculations show that strong electronic coupling at the heterojunction interface optimizes the adsorption energy of molecular water and hydrogen on active sites, thereby enhancing the intrinsic activity. This work offers novel insights for designing high-performance alkaline HER electrocatalysts through coupling doping and heterostructure engineering.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2025
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IF 2.9
Heng Ke,Jixiang Zhang,Wenqi Luo,Yunshan Ding,Liangzhe Chen,Wentao Tang,Youbing Zhang,Jing Ding,Jun Wang,Hong Wang
The fabrication of highly efficient and stable non-noble metal hydrogen evolution reaction (HER) electrocatalysts is of paramount significance for alleviating the energy and environmental crises. Herein, nickel (Ni) nanoparticles anchored on a carbon layer dispersed on carbon materials (Ni/C) are synthesized via a facile one-step thermal treatment. The nanostructure can facilitate mass transfer, expose more active sites and promote hydrogen (H2) gas release. Benefiting from these advantages, Ni/C-0.8 exhibits excellent electrocatalytic HER performance. The overpotential of Ni/C-0.8 is −132 mV at −10 mA cm−2, and its Tafel slope is 117 mV dec−1 in an alkaline solution. Additionally, Ni/C-0.8 exhibits remarkable stability during long-term testing. This work offers a new avenue for designing and fabricating non-noble metal electrocatalysts for the electrocatalytic HER.
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JOURNAL OF POWER SOURCES
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2025
·
IF 7.9
Mingxue Yao,Meng Wang,Ye Hu,Nana Li,Baohui Wang
To meet the demands of high-performance and sustainable energy storage, this study proposes a novel VB 2 –air battery system combining a high-capacity vanadium diboride (VB 2 ) anode with a nitrogen-doped carbon-supported iron single-atom catalyst (Fe/NC) cathode. The VB 2 anode, featuring a theoretical 11-electron redox reaction, delivers ultra-high specific capacity, while the Fe/NC cathode exhibits excellent oxygen reduction reaction (ORR) performance and atomic-level dispersion. For the first time, we demonstrate that this SAC-based cathode enables outstanding synergy with the VB 2 anode, resulting in enhanced discharge capacity (up to 3900 mAh·g −1 ), excellent rate capability, and long-term discharge efficiency retention (84.4 % after 10 continuous cycles). This work reveals a promising pathway toward cost-effective, high-performance primary metal–air batteries and offers a new paradigm in cathode–anode reaction coordination for multi-electron systems.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-10
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IF 15.7
He Xun,Yao Yongchao,Zhang Limei,Wang Hefeng,Tang Hong,Jiang Wenlong,Ren Yuchun,Nan Jue,Luo Yongsong,Wu Tongwei,Luo Fengming,Tang Bo,Sun Xuping
Direct seawater electrolysis at ampere-level current densities, powered by coastal/offshore renewables, is an attractive avenue for sustainable hydrogen production but is undermined by chloride-induced anode degradation. Here we demonstrate the use of hexafluorophosphate (PF₆⁻) as an electrolyte additive to overcome this limitation, achieving prolonged operation for over 5,000 hours at 1 A cm −2 and 2300 hours at 2 A cm −2 using NiFe layered double hydroxide (LDH) as anode. Together with the experimental findings, PF₆⁻ can intercalate into LDH interlayers and adsorb onto the electrode surface under an applied electric field, blocking Cl⁻ and stabilizing Fe to prevent segregation. The constant-potential molecular dynamics simulations further reveal the accumulation of high surface concentrations of PF 6 − on the electrode surface that can effectively exclude Cl − , mitigating corrosion. Our work showcases synchronous interlayer and surface engineering by single non-oxygen anion species to enable Cl − rejection and marks a crucial step forward in seawater electrolysis.
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