Journal of Energy Storage
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2026
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IF 10.7
Ning Gao,Ben Hu,Yuqi Chen,Junhao Zhang,Yuanjun Liu,Xiangjun Zheng,Qianqian Fan,Ying Zhang,Qinghong Kong,Xingmei Guo
Sluggish oxygen reduction reaction (ORR)/oxygen evolution reaction (OER) reaction kinetics restrict the application of zinc-air batteries, making the exploration of high-performance bifunctional electrocatalysts imperative. Here, a multiple synergistic strategy is proposed to fabricate Co//NiFe@CNFs composite with spatially separated dual-active-sites, with NiFe nanoparticles encapsulated inside carbon fibers and Co nanoparticles anchored on their outer surfaces. The catalyst exhibits excellent bifunctional catalytic activity with a high ORR half-wave potential of 0.865 V (vs. RHE) and a low OER overpotential of 310 mV at 10 mA cm −2 . Meanwhile, the Co//NiFe@CNFs catalyst shows excellent durability with a current retention rate of 95.41% after 35,000 s and methanol tolerance. The assembled zinc-air battery achieves a peak power density of 145.6 mW cm −2 at 231.9 mA cm −2 and a specific capacity of 815 mAh g Zn −1 at 10 mA cm −2 , and excellent cycling stability. The excellent electrocatalytic performance originates from multifactor synergy that the porous fibrous structure accelerates mass transport, Co and NiFe nanoparticles provide abundant active sites, and their spatial separation improves structural stability while eliminating cross-interference between active centers for different catalytic pathways.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Junhao Lu,Jun Wang,Yaojin Duan,Lan Ma,Dongfeng Zhai,Ihar Razanau,Kunming Pan,Yaru Li,Saifei Pan
Designing transition metal phosphides (TMPs) with remarkable performance and high stability for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) plays a significant role in the commercial application of water splitting. Bimetallic phosphide (NiCoP) exhibits favorable electrocatalytic activity; however, it still suffers from intrinsic limitations such as insufficient intrinsic activity, inferior electrical conductivity, and a tendency toward particle agglomeration. To address these issues, a CeO 2 modified NiCoP particle catalyst (referred to as CeO 2 -NiCoP/Ti 3 C 2 T x ) loaded on a few layers of Ti 3 C 2 Tx MXene was synthesized using an HCl/LiF etching and hydrothermal phosphorization method. The CeO 2 -NiCoP/Ti 3 C 2 T x catalyst exhibits significantly lower overpotentials (287 mV for OER and 147 mV for HER) to achieve a current density of 10 mA cm −2 . Moreover, the catalyst demonstrates outstanding durability, with 93.6% and 84.6% retention of its activity after 27 h of OER and 25 h of HER, respectively.The favorable performance of CeO 2 -NiCoP/Ti 3 C 2 T x in HER and OER can be attributed to several advantages. Few-layer Ti 3 C 2 T x enhances the electrical conductivity of the material, and its large specific surface area prevents particle agglomeration, thus improving the material stability.The -O/-OH functional groups on the surface of Ti 3 C 2 T x endow the material with strong hydrophilicity, which facilitates the full contact between active sites and the electrolyte and accelerates the mass transfer and charge transfer kinetics. CeO 2 effectively optimizes the adsorption energy of NiCoP toward hydrogen intermediates by regulating the microelectronic structure of NiCoP, thereby boosting the HER kinetics.
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Jia-Yi Chen,Yu-Shu Han,Qing He,Yu-Qiong Huang,Ju-Hua Li,Zhong-Li Wang
A strong interaction interface is constructed between TiO 2 particles and NiMo nanorods. • NiMo alloy electrodes with and without TiO 2 exhibit different reconstruction processes as both anode and cathode. • TiO 2 tailored NiMo electrodes exhibits excellent activity and stability for over 10,000 h at 500 mA cm −2 in 30% KOH at 80 °C. • The reaction mechanism was systematically studied by in situ Raman spectroscopy and 18 O isotope labeling. The reconstruction process of electrocatalysts plays an important role in the electrocatalytic process, and how to tailor the reconstruction is crucial for the performance and remains greatly challenging. Herein, we demonstrate that TiO 2 can tailor the reconstruction process of NiMo alloy for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) reactions. NiMoO 4 microrods arrays adsorbed with titanium butoxide on its surface are converted into TiO 2 modified NiMo alloy under high-temperature reduction. NiMo alloy electrodes with and without TiO 2 exhibit different reconstruction processes as both anode and cathode under simulated industrial conditions (30% KOH, 80 °C). With TiO 2 , the cathode and anode are reconstructed into ultrafine Ni(OH) 2 nanosheets coated on NiMo alloy and ultrafine NiOOH nanosheets, respectively. Without TiO 2 , NiMo alloy electrodes are reconstructed into large-sized Ni(OH) 2 or NiOOH nanosheets on the cathode or anode. The TiO 2 tailored NiMo electrodes exhibit low overpotentials of 29 mV for HER and 213 mV for OER at a current density of 10 mA cm −2 in 1 M KOH at 25 °C. Moreover, an electrolytic cell assembled by them as both cathode and anode electrodes can maintain 1.8 V at a current density 500 mA cm −2 with stable running for over 10,000 h in 30% KOH at 80 °C. Mechanism studies indicate that TiO 3 2− ions intercalate into the interlayer of Ni(OH) 2 , inhibiting the dissolution of Mo and controlling the size of Ni(OH) 2 , and the bond lengths of Ni O and Ni Mo bonds are shortened, which effectively enhance catalytic activity and stability. Download: Download high-res image (60KB) Download: Download full-size image
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Siwei Sun,Xinxin Zhang,Haitao Yu,Ying Xie
NiFe alloy is regarded as a promising electrocatalyst for water splitting owing to its superior conductivity, tunable electronic structure, and abundant active sites. Nevertheless, its practical application is hindered by slow water dissociation kinetics and unfavorable adsorption of hydrogen intermediates. Herein, we develop a composite catalyst, denoted as Co/Ni 3 Fe@NC-3 through a coordination-pyrolysis route, where ZIF-67-derived Co nanoparticles are anchored on Ni 3 Fe@NC porous nanosheets. In 1 M KOH, the catalyst exhibits remarkable bifunctional activity, requiring overpotentials of 67 mV for HER and 240 mV for OER at 10 mA cm −2 . Notably, a symmetric electrolyzer based on this catalyst (Co/Ni 3 Fe@NC-3) (+||−) achieves overall water splitting at a low voltage of 1.499 V (10 mA cm −2 ), superior to the commercial Pt/C||RuO 2 benchmark (1.592 V), and sustains stable operation for 100 h at 100 mA cm −2 . In-situ electrochemical impedance spectroscopy (EIS) indicates that Co incorporation optimizes the interfacial electronic structure, leading to faster charge transfer and reduced impedance. Density functional theory (DFT) calculations and experimental results further demonstrate that Co-induced interfacial electron redistribution upshifts the d-band centers ( E d ) of Ni/Fe sites, strengthens the adsorption of H* and H 2 O, and thus synergistically enhances both HER and OER performance. This study highlights the effectiveness of interface engineering and electronic structure modulation, providing a viable strategy for designing advanced NiFe-based water-splitting catalysts.
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Small Methods
·
2026
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IF 8.7
Enmin Lv,Yilong Wang,Hongtao Yu,Hao Zhang,Xuefeng Zhang,Xinglong Dong
Developing efficient non-precious oxygen reduction reaction (ORR) catalysts is essential for advancing zinc-air batteries (ZABs). This work presents a one-step synthesis of core-shell Cr 3 C 2 @C nanoparticles (NPs) via DC arc-discharge plasma. Precise regulation of cooling dynamics achieves a switch from growth-dominated to nucleation-dominated regimes, enabling controlled preparation of nanoparticles with distinct sizes. The liquid-nitrogen-cooled Cr 3 C 2 @C ln NPs exhibit smaller size and higher surface area, leading to enhanced ORR performance. Subsequent nitrogen doping at 700 °C produces Cr 3 C 2 @C ln (N x ) catalysts with precisely tuned nitrogen content (0.65–1.24 at.%). The optimized Cr 3 C 2 @C ln (N 1.13 ) demonstrates outstanding ORR activity with a half-wave potential ( E 1/2 ) of 0.81 V and superior kinetics, surpassing commercial Pt/C. In situ optical emission spectroscopy (OES) monitors the plasma state and electron temperature, providing fundamental insights into nucleation mechanisms. Density functional theory (DFT) calculations reveal that nitrogen doping optimizes the p -band center of carbon and significantly reduces the energy barrier of the rate-determining step (RDS) (*OH desorption). When applied in both liquid and solid-state flexible zinc-air batteries (FZABs), the Cr 3 C 2 @C ln (N 1.13 )-based cathode delivers exceptional performance, achieving high power densities (230.64 and 164.83 mW·cm −2 , respectively) and remarkable cycling stability. This study offers an efficient strategy for designing high-performance transition metal carbide electrocatalysts through synergistic control of size and electronic structure.
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PubMed
高影响因子
Science China-Materials
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2026
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IF 7.7
Zhang Chenxu,Li Ziyan,Zhao Linfei,Li Yajun,Yin Qing,Zhao Danyang,Li Yongzhi,Xiao Bin,Meng Qingkun,Ren Yaojian,Xue Xiaolan,Wei Fuxiang,Sui Yanwei,Wu Xiangfeng,Qi Jiqiu,Ho Johnny C.
Electrochemical water splitting is crucial for the scalable production of green hydrogen; however, the practical implementation requires cost-effective electrocatalysts with high activity and durability. This study introduces a low-cost, three-dimensional (3D) nanoporous ZrVFeCoNi material, fabricated via chemical dealloying, at just 0.16% of the cost of Pt. The structure-activity relationship between its microstructure and hydrogen evolution reaction (HER) performance was systematically explored. The lattice defect effects from multiphase intermetallic compounds, combined with multi-metal synergy, optimize H + adsorption energy and electron transfer kinetics. The 3D nanoporous design provides a high electrochemical surface area with abundant active sites, thereby enhancing electrolyte penetration and reducing interfacial mass transfer resistance. Consequently, the ZrVFe-CoNi electrode exhibits outstanding HER performance, requiring only a 38 mV overpotential to reach 10 mA cm −2 and maintaining stable operation for 1000 h at 500 mA cm −2 . Integrated into a full water electrolyzer (ZrVFeCoNi ∥ IrO 2 /Ni), the system achieves a cell voltage of 1.60 V at a current density of 400 mA cm −2 . Advanced characterization and density functional theory (DFT) calculations reveal that interfacial interactions and charge transfer at heterointerfaces drive the catalytic activity, showcasing the potential of 3D nano-structured multiphase intermetallic compounds as high-performance electrocatalysts for green hydrogen systems.
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ACS Applied Materials & Interfaces
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2026
·Vol. 18
·期 34
·46387-46395
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IF 7.8
Zheng Rong,Liu Zhi,Cheng Zhen,Zhang Jingze,Hou Chengyi,Zhang Qinghong,Li Yaogang,Li Kerui,Wang Hongzhi
Rechargeable zinc-air batteries (ZABs) are promising for next-generation energy storage, yet their output voltage is strongly constrained by conventional electrolyte configurations. Although pH-decoupled asymmetric systems can expand the electrochemical window, uncontrolled OH – crossover progressively dissipates the interfacial pH gradient and accelerates neutralization, leading to rapid performance decay. Here, an oxygen vacancy-driven anion gating (OVDAG) strategy is reported for asymmetric ZABs using a separator modified with oxygen-vacancy-rich WO 3 nanofillers. The oxygen-vacancy-rich WO 3 introduces defect-associated W sites that modulate the interaction with OH – and effectively retard OH – crossover across the asymmetric interface. This vacancy-mediated anion regulation suppresses interfacial neutralization, stabilizes the local pH gradient, and enhances ionic conductivity by 72%, thereby alleviating the trade-off between ion selectivity and transport efficiency. As a result, the assembled asymmetric ZABs deliver open-circuit voltages of 2.16 V (liquid) and 2.22 V (gel), stable discharge plateaus of ∼1.7–1.8 V and cycling durability of up to 150 h (liquid) and 120 h (gel). This work establishes oxygen-vacancy-driven anion gating as an effective strategy for high-voltage and durable ZABs.
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CARBON
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2026
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IF 12.7
Qiulan Zhou,Neng Li,Jingjing Liu,Guiyuan Chen,Xin Qin,Zhicheng Wang,Yongfang Wei,Zhen Liu
Direct seawater electrolysis offers a sustainable pathway for large-scale hydrogen production but is fundamentally limited by chloride-induced corrosion, parasitic chlorine chemistry, and rapid catalyst degradation at industrial current densities. Here, we report a Ru-doped Ni-based-layered double hydroxide integrated with a pyrolyzed wood-derived carbon scaffold (NiRu-LDH@pWD) that addresses these issues through synergistic electronic structure and electrode architecture engineering. Ru doping reconfigures the local electronic environment of Ni, strengthens Ni–O coordination, downshifts the d -band center, and suppresses Cl∗ adsorption, thereby enhancing catalytic selectivity and stability in chloride-rich electrolytes. Concurrently, Ru doping induced lattice modulation promotes preferential exposure of catalytically active (012) edge planes. The hierarchically porous pWD carbon scaffold enables rapid charge transport, efficient ion diffusion, and superaerophobic gas release, sustaining high-rate operation. As a result, the NiRu-LDH@pWD electrode delivers low overpotentials for HER (74.7 mV in 1 M KOH and 101.1 mV in seawater) and OER (240 mV in 1 M KOH and 260 mV in seawater) at 10 A cm −2 , and exhibits >1000 h operational durability at 1 A cm −2 in seawater. An anion exchange membrane water electrolyzer assembled with NiRu-LDH@pWD achieves a low cell voltage of 2.01 V at 1 A cm −2 with negligible performance decay, meanwhile techno-economic analysis estimates a competitive hydrogen production cost of ∼US$0.35 kg −1 by ASPEN calculation. This work establishes an integrated strategy that couples atomic-scale electronic regulation with macroscopic electrode design to enable selective, durable, and economically viable seawater electrolysis.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 9.2
Yachao Huang,Hailong Zhong,Qihong Zhou,Wenqi Feng,Huan Li,Jinming Zeng,Chao Liu,Xiaopeng Qi
Developing a bifunctional catalyst that combines low cost and high performance for water electrolysis remains an unsolved challenge. In this study, a Cr-doped transition metal-based electrocatalytic material is synthesized on a stainless steel mesh substrate. The obtained Cr 0.2 -CoP/SS catalyst exhibits an overpotential of only 98 mV for the hydrogen evolution reaction (HER) at 10 mA cm −2 in alkaline electrolyte, and exhibits an overpotential of 254 mV for the oxygen evolution reaction (OER); in acidic electrolyte, the HER overpotential at 10 mA cm −2 is as low as 118 mV, and it demonstrates excellent stability. Furthermore, when Cr 0.2 -CoP/SS is used in traditional overall water splitting systems, the required voltage at 10 mA cm −2 is as low as 1.56 V. Theoretical studies show that Cr doping reduces the Gibbs free energy of hydrogen adsorption and narrows the bandgap to zero, which enhances catalytic activity and structural stability.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Lichan Wu,Liuyan Zhang,Yidong Huang,Zeyi Guan,Renyu Zhou,Yan Pan,Danting Wu,Gengzhe Shen,Yanmei Zhang
Developing efficient bifunctional electrocatalysts capable of facilitating water splitting to produce hydrogen and oxygen remains a significant challenge. This study presents a controllable conversion of MOFs to carbon-coated NiCoP nanostructures via low-temperature phosphidation using a NiCo-MOF/Ti 3 C 2 T x precursor, leading to the construction of the NiCoP@C/Ti 3 C 2 T x bifunctional electrocatalyst. Characterization of the synthesized NiCoP@C/Ti 3 C 2 T x composite material and electrochemical testing revealed that the material exhibits high catalytic activity in both HER and OER. At a current density of 10 mA cm −2 , the overpotential for HER is measured at 58 mV with a Tafel slope of 60 mV dec −1 , while the overpotential for OER is found to be 240 mV, with a Tafel slope of 42 mV dec −1 . The potential required to achieve a current density of 10 mA cm −2 for overall water splitting is 1.53 V, which is lower than commercial Pt/C and RuO 2 electrocatalysts. Additionally, the material demonstrates excellent electrocatalytic performance at higher current densities. The outstanding electrocatalytic performance is attributed to the effective stabilizing effect of the carbon-coated layer on the high-activity NiCoP particles, thereby suppressing the loss of active sites during the reaction. Moreover, the strong interfacial coupling effect between NiCoP and Ti 3 C 2 T x significantly enhances the interfacial charge transfer kinetics, consequently improving catalytic efficiency.
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CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Siraj Ullah,Waqas Ahmed,Shuozhen Hu,Xinsheng Zhang
Electrochemical water splitting is a potential method for sustainable hydrogen production. Achieving efficient and durable bifunctional electrocatalysts for alkaline water splitting remains challenging due to sluggish OER/HER kinetics and a reliance on noble metals. Here, we introduce MX-CoFe/EMN, a binder-free hybrid electrocatalyst fabricated by sequential electrodeposition of Ti 3 C 2 T x MXene integrated CoFe layered double hydroxide (LDH) nanosheets onto nickel foam. Combining CoFe LDH with MXene, which serves as both conductive scaffold and active component, yields beneficial interfacial electronic interactions, enhanced charge transfer, and a high density of active sites. In 1.0 M KOH, MX-CoFe/EMN shows low overpotentials of 260 mV (OER) and 279 mV (HER) at ±100 mA cm −2 , small Tafel slopes 39 mV dec −1 (OER), 68 mV dec −1 (HER), and excellent durability of over 80 h at ±500 mA cm −2 . These findings demonstrate a scalable electrodepositin-based approach for developing highly active and durable non-noble-metal electrocatalysts for sustainable hydrogen generation.
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NEW JOURNAL OF CHEMISTRY
·
2026
·
IF 2.6
Junshan Ding,Chao Yang,Xinqiang Xiao,Yu Hu,Liangzhe Chen,Wentao Tang,Youbing Zhang,Jing Ding,Jun Wang,Heng Ke
Developing metal nanoparticles (NPs)/carbon composite nanomaterials as electrocatalysts for hydrogen evolution reaction (HER) via a facile and low-cost strategy has attracted widely attention over the past decade. Herein, a series of nickel nanoparticles/carbon materials (Ni/C-m) composite electrocatalyst has been successfully synthesized via a simple molten salt pyrolysis method. Characterizations demonstrated that carbon materials can effectively prevent Ni nanoparticles aggregation and adjust the electron cloud density in Ni/C-m samples. During the preparation of Ni/C-m, the carbon content can be adjusted by varying the mass of sodium citrate, an appropriate carbon content can enhances electron transfer and promotes electrocatalytic HER activity. Ni/C-m exhibits better electrocatalytic HER activity than Ni sample which prepared without carbon materials precursor. The as-prepared Ni/C-0.8 composites electrocatalyst exhibits the lowest overpotential among all Ni/C-m samples (-109 mV at -10 mA cm-2 and -397 mV at -200 mA cm-2) and long-time stability. This research presents a new method for fabricating and designing a cost-effective, high-performance HER electrocatalyst for practical water splitting applications.
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