INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Zhong Wang,Xinjia Tan,Chuhan Wang,Guojian Li,Shuang Yuan
Ni/NiO is regarded as an ideal candidate material to replace noble metal catalysts due to its good corrosion resistance and excellent hydrogen evolution activity. However, the poor stability of Ni/NiO catalyst in the process of long-term water electrolysis limits its large-scale application. In this study, a facile hydrothermal method was used to successfully synthesize highly active and stable nanoparticulate Mo–Ni/NiO catalysts. Density functional theory (DFT) shows that Mo doping can optimize the charge transfer of Ni/NiO, reduce the d-band center and accelerate the H* dissociation from the catalyst surface. COMSOL numerical simulation further confirmed that the granular structure can enhance the ion concentration and promote H 2 generation. Electrochemical tests showed that the overpotential of Mo–Ni/NiO was only 45 mV when the current density was 10 mA cm −2 in 1 M KOH solution, which was much lower than 158 mV of Ni/NiO. Furthermore, Mo–Ni/NiO exhibited superior stability when operated at a current density of 10 mA cm −2 for 150 h with a reduction of overpotential of only 2 mV. This work provides a simple method for improving the HER activity of catalysts with Mo doping, which provides a new idea for designing catalysts with high activity, excellent stability and low cost.
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Journal of Materials Chemistry A
·
2024
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IF 10.7
Lijuan Zhu,Zhongjie Lai,Jilong Xu,Peiyu Ma,Jiaxiang Lu,Qian Xu,Yitao Lin,Lei Zheng,Lihui Wu,Honghe Ding,Jiawei Ge,Yifan Ye
The metal–support interaction of heterogeneous catalysts has garnered significant attention due to its role in boosting electrocatalytic efficiency. Herein, we synthesized uniformly dispersed Pt nanoparticles decorated on a MoOx support by an ultrafast flash joule heating method. This method enables the simultaneous loading of metal and modification of support structures in a controllable, ultrafast manner. The optimal catalyst demonstrates exceptional performance in the hydrogen evolution reaction (HER) under acidic conditions, characterized by a low overpotential of only 55.08 mV to achieve a current density of 100 mA cm−2, a Tafel slope of 19.94 mV dec−1, and a significant mass activity of 13.80 A mgPt−1 at 50 mV vs. RHE. In addition, the optimal catalyst exhibits better stability for the HER than a commercial 20 wt% Pt/C catalyst. The spectroscopic characterization confirms the charge transfer between the metal and support, leading to a near-zero valence state of Pt in the optimal catalyst. Density functional theory calculations further corroborate that the metal–support interaction between Pt and MoOx leads to a suitable hydrogen adsorption free energy at the interfacial Pt site, which results in accelerating the reaction kinetics of the HER. This work aims to design and develop a metal–support heterostructure with high HER activity and stability, and provides a strategy for engineering crystalline structures and electronic configurations using an ultrafast flash Joule heating synthesis method.
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MATERIALS LETTERS
·
2024
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IF 2.7
Hongwei Niu,Jia Hui,Zhou Yang,Hengfei Qin
It is an important task for designing a facile bifunctional electrocatalyst that is applied to a zinc-air battery (ZAB). Herein, the 2D C 4 N is synthesized by hydrothermal method, and ultralow noble metal palladium (Pd) is doped into the C 4 N to form Pd-C 4 N. The Pd-C 4 N has a low Δ E of 0.76 V in 0.1 M KOH, which is a good candidate as the bifunctional electrocatalyst for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in the ZABs. This work provides a design idea of modified carbon-based material for bifunctional electrocatalysts.
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InfoMat
·
2025
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IF 22.3
Yalei Fan,Shengjie Zhang,Xubin Ye,Jing Zhou,Qingyu Kong,Jihao Zhang,Youwen Long,Jian-Qiang Wang,Zhiwei Hu,Linjuan Zhang
Hydrogen production via water electrolysis offers a sustainable pathway to decarbonize energy systems, yet the development of cost-effective, efficient bifunctional electrocatalysts for overall water splitting (OWS) still remains a critical challenge. Current catalysts often rely on complex multiphase heterostructures to optimize oxygen and hydrogen evolution reactions (OER/HER), but their intricate designs increase costs and hinder scalability. Here, we present a single-phase bifunctional electrocatalyst, CaCu 3 Co 2 Ru 2 O 12 (CCCRO), which exhibited exceptional performance for OWS in alkaline conditions, specifically, 1.536 V at 10 mA cm −2 and 1.629 V at 100 mA cm −2 , along with 500 h of operational stability at a current density of 100 mA cm −2 . In situ x-ray absorption spectroscopy (XAS) revealed the valence-state transition from Cu 2+ /Co 3+ /Ru 5+ to Cu 2+ /Co 3.5+ /Ru 5.5+ during OER, but both valence state reduction and structural reconstruction into a CuCoRu nanoalloy occurred under HER conditions. Density functional theory (DFT) calculations indicated that synergistic effects among Cu, Co, and Ru ions enhance catalytic activities for both OER and HER. This work demonstrates that structurally simple yet compositionally tuned oxides can surpass complex catalysts in both the efficiency and durability of OWS, offering a scalable design paradigm for advancing green hydrogen technologies.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Hanwei Zhao,Bowen Zhang,Enze Fan,Zhuanfang Zhang,Guohua Dong,Wenzhi Zhang,Liming Bai,Ming Zhao,Dong-Feng Chai,Xiaoming Huang
CoMoO 4 is a promising oxygen evolution reaction (OER) catalyst owing to its distinct crystallographic configuration and redox versatility. However, its practical applications remain limited by its suboptimal active site density and inefficient charge-transport mechanisms. To address these challenges, a one-step hydrothermal method is developed to introduce Al atoms into the CoMoO 4 framework, yielding an Al-doped electrocatalyst (Al–CoMoO 4 -1/NF) featuring enhanced functionality. Al–CoMoO 4 -1/NF achieves an OER current density of 10 mA cm −2 at an overpotential of 184 mV, demonstrating a Tafel slope of 55.6 mV dec −1 . In full water-splitting configurations, the Al–CoMoO 4 -1/NF(+)||Pt/C/NF(−) electrolyzer attains 10 mA cm −2 at 1.52 V, outperforming various nonprecious-metal-based systems. Al integration regulates ∗OH intermediate adsorption equilibrium and strengthens interactions with oxygenated species. Al incorporation considerably reduces charge-transfer resistance and accelerates reaction kinetics. The larger specific surface area of the Al-doped structure exposes more active sites and increases the electrode/electrolyte interfacial contact area, improving catalytic activity. These synergistic effects enhance intrinsic activity and mass-transport efficiency. Leveraging abundant Al for structural modulation, this study advances the rational design of high-performance, cost-efficient OER catalysts for sustainable energy conversion.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
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IF 15.7
He Xun,Yao Yongchao,Zhang Min,Zhou Yilei,Zhang Limei,Ren Yuchun,Dong Kai,Tang Hong,Nan Jue,Zhou Xingli,Luo Han,Ying Binwu,Yu Qi,Luo Fengming,Tang Bo,Sun Xuping
Seawater electrolysis driven by offshore renewable energy is a promising avenue for large-scale hydrogen production but faces challenges in designing robust anodes that suppress surface chlorine reactions and corrosion at high current densities. Here we report a strategy by selectively docking PW 12 -polyoxometalate (PW 12 -POM) onto Fe sites of CoFe hydroxide anode to modulate the electronic structure of adjacent Co active centers and regulate Cl⁻/OH⁻ adsorption for efficient alkaline seawater oxidation. Our CoFe-based anode achieves low overpotentials, high catalytic selectivity, and notable durability, with continuous operation at 1 A cm⁻² for over 1300 hours and at 2 A cm⁻² more than 600 hours. Theoretical calculations and ex situ/in situ analyses reveal that PW 12 -POM coordination at Fe sites stabilizes Fe, suppresses its leaching, modulates Co acidity, promotes OH⁻ adsorption, and protects metal sites from Cl⁻ corrosion.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
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IF 3.9
Tao Cong,Xiaoyu Wang,Xifeng Ding
Metal–air batteries, with high energy density and eco-friendliness, are crucial for sustainable energy. Although abundant and low-cost, spinel oxides, ideal for metal–air batteries, suffer from low conductivity, hindering electron transport and slowing electrocatalytic kinetics. In this work, NiCo2O4 (NCO) was embedded on carbon nanotubes (CNTs) via a hydrothermal method to form a composite catalyst (NCO-1CNTs), and subsequent annealing in nitrogen enhanced oxygen vacancy concentration in the spinel structure. In 0.1 M KOH, NCO-1CNTs achieves outstanding oxygen evolution reaction (OER) performance (η10 = 427 mV) and oxygen reduction reaction (ORR) performance (jL = 5.1 mA cm–2), surpassing NCO by 16.6% and 82.1%. The enhanced catalytic activity is attributed to the high conductivity of carbon nanotubes, which accelerates electron transfer. Additionally, carbon nanotubes prevent spinel oxide aggregation, increase active sites, and form a porous structure, enhancing oxygen species transport. Moreover, annealing NCO-1CNTs in a nitrogen atmosphere induces the spinel component to generate more oxygen vacancies, boosting catalytic performance. The resulting zinc–air battery delivers a power density of 68 mW cm–2 and exhibits stable performance over 100 h of charge–discharge cycling. This study delivers a low-cost, high-activity, stable bifunctional cathode catalyst, signaling great promise for commercial rechargeable zinc–air batteries.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-13
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IF 15.7
Wang Xinzhong,Su Yiwen,Chen Jiashu,Yan Edward Hengzhou,Xia Qing,Wu Jie,Gong Shanhe,Tang Mingcong,Yip Wai Sze,Mu Yongbiao,Yi Yuyang,Wu Jinjin,Xu Fujing,Yang Xianzhong,Zhang Xiao,Dou Shixue,Sun Jingyu,Zheng Guangping
Current electrosynthesis catalysts typically rely on nanomaterial-based engineering with multi-dimensional structural modifications. However, such approaches may not always be necessary, especially for underexplored industrial electrochemical conversions. Here, we demonstrate that commercial platinum (Pt) foil catalysts excel in the electrochemical co-oxidation of waste polyethylene terephthalate (PET)-derived ethylene glycol (EG) and ammonia (NH 3 ) into formamide (HCONH 2 ), a process traditionally reliant on energy-intensive methods. This approach achieves a high Faradaic efficiency (FE) of 55.87 ± 1.4% and a productivity of 1003.63 ± 23.72 µmol cm −2 h −1 at industrially relevant current densities without any degradation for durable operation (more than 500 h and 300 h for H-cell and membrane electrode assembly (MEA) reactor, respectively). In situ spectroscopy, supported by theoretical calculations, suggests that *CH 2 O and *NH 2 are likely key intermediates. Furthermore, the product sustainability index (ProdSI) and techno-economic analysis (TEA) underscore the cost-effectiveness and sustainability of noble Pt foil in this scenario, challenging the conventional reliance on complex electrocatalysts. This work provides distinctive insights into catalyst screening and demonstrates a viable strategy for upcycling waste plastics.
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COMPOSITES PART B-ENGINEERING
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2025
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IF 14.2
Bingbing Qiu,Donghui Zhang,Ruiming Fang,Yanfang Wang,Banglong Shen,Junhao Dai,Huaqiang Chu
Electrocatalytic hydrogen production is a green and feasible method for obtaining hydrogen energy. However, the bottlenecks of high cost, low catalytic activity and inferior stability urgently need to be addressed, and constructing advanced catalysts with optimized microscopic morphology and crystal structure is a feasible and effective strategy to overcome this barrier. Herein, an artful strategy of in-situ grown coupled with N doping and C encapsulation was employed to obtain the NC/NiO–Mo/NF with biomimetic cattle stomach-liked porous structure, which can offer shortcut for ion transportation and expose more active sites for H∗ adsorption. Particularly, the constructed NiMoO 4 –NiO heterojunction in NC/NiO–Mo/NF can significantly boost the hydrogen evolution activity. Meanwhile, the density functional theory (DFT) confirm that the construction of the crystalline-amorphous heterojunction induces electron transfer from NiMoO 4 to NiO, promoting a downshift in the d-band center, thereby achieving a near-thermoneutral free energy for the hydrogen evolution reaction (HER). The de-signed electrocatalyst exhibits exceptional HER activity, with a small overpotential of 48 mV to achieve a current density of 10 mA cm −2 . It is important that NC/NiO–Mo/NF exhibits exceptional HER stability, with current density of 50 mA cm −2 for 100 h. The finding provides a feasible strategy for the fabrication of nonprecious-metal-based HER electrocatalysts with high activity and stability toward industrial water electrolysis.
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ACS Applied Materials & Interfaces
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2025
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IF 8.2
Boli Zhao,Ying Wang,Junyi Che,Liquan Xiong,Di Gao,Dongsheng Chen
The development of a catalyst that is efficient, clean, simple, inexpensive, and conducive to a wide range of industrial applications is the key to achieving water electrolysis for hydrogen production. In this paper, iron-doped ZIF-67 materials were synthesized using a one-step hydrothermal method, with the different molar ratios of n (Fe3+): n (Co2+) = 0.05%, 1%, 2%, 5%, 10%. We found that trace amounts of iron greatly changed the particle size of ZIF-67. After high-temperature pyrolysis (400 °C, 600 °C, and 800 °C), the electrochemical results showed that the content of doped iron and different pyrolysis temperatures lead to different hydrogen evolution reaction (HER) effects. The 1% Fe/Co-600 sample with the overpotential (202 mV) at 10 mA·cm–2 and the Tafel slope (125.1 mV·dec–1) was significantly lower than other iron-doped materials and exhibited a better HER performance, though still higher than the commercial Pt/C (5 wt %) catalyst with the overpotential of 179 mV at 10 mA·cm–2 and the Tafel slope of 67.8 mV·dec–1. Significantly, the 1% Fe/Co-600 sample has strong stability. After pyrolysis, the 1% Fe/Co-600 sample still had a large specific surface area of 290.1763 m2·g–1 and a porous structure consisting of micropores and mesopores, which improved the catalytic effect. It may provide a new way to modify the catalyst geometry and design and prepare low-cost and high-activity Co-based catalysts.
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DALTON TRANSACTIONS
·
2025
·
IF 3.3
Li Zhang,Youwen Li,Yuying Feng,Jiahui Jiang,Ting Zhao,Guancheng Xu
A trimetallic selenide electrocatalyst (Co, Fe, Ni)Se2 supported on nickel foam (NF) has been successfully synthesized for the oxygen evolution reaction (OER) and urea oxidation reaction (UOR). The catalyst was fabricated through a two-step strategy involving the formation of metal-organic frameworks (MOFs) precursors followed by a selenization reaction. The optimized (Co, Fe, Ni)Se2/NF-3:1 exhibited remarkable OER activity with an overpotential as low as 170 mV to achieve 10 mA cm-2, along with excellent stability over 1000 cycles. Its superior UOR performance with even lower overpotential further demonstrates promise for urea-assisted energy-saving hydrogen production. The enhanced electrocatalytic performance originates from the synergistic electronic modulation between Co, Fe, and Ni, the rough surface morphology facilitating mass and charge transport, and the highly conductive NF substrate enabling efficient exposure of active sites. This work provides valuable insights into the design of efficient multimetallic selenide electrocatalysts for sustainable electrochemical energy conversion.
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ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Mingzhi Zhang,Shujuan Wang,Hongwei Guo,Fan Lv,Tianjiao Ling,Yi Cao,Hongwei Li,Huihua Wang,Jinxin Chen,Ruiqi Guo
Self-supported electrodes featuring transition metals encapsulated within carbon nanotubes (CNTs) are promising bifunctional catalytic electrodes for overall water splitting due to their binder-free fabrication (eliminating costly Nafion), high electrical conductivity, mechanical strength, and low cost. However, challenges remain, including insufficient catalytic activity and stability, as well as underutilization of the CNTs’ functionality. Herein, we strategically modified a Fe-based self-supported electrode with ultrafine IrOx nanoclusters (IrOx NCs), creating Fe@CNTs/IrOx NCs/CC, which exhibits enhanced bifunctional performance for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in 1.0 M KOH. The optimized Fe10@CNTs/IrOx NCs/CC requires low HER and OER overpotentials of 36.7 mV and 203.5 mV at the current density of ± 10 mA cm–2. It also shows a high mass activity of 214.8 A gIr–1 at 100 mV. Moreover, water splitting cells employing Fe10@CNTs/IrOx NCs/CC as both the anode and cathode require only 1.50 V to reach 10 mA cm–2 and demonstrate stable operation exceeding 100 h. Detailed theoretical calculations prove that the IrOx NCs synergistically enhance HER kinetics by promoting both the H2O adsorption-dissociation efficiency and optimized *H desorption. For the OER process, they significantly lower the energy barrier of the rate-determining step (*O → *OOH), thereby accelerating the overall water splitting process of Fe10@CNTs/IrOx NCs/CC. This work highlights an innovative research route for boosting the water splitting performance through targeted modification of the self-supported electrode.
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