ACS Catalysis
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2025
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IF 13.1
Wei An,Zeyang Liu,Tongjun Shen,Yizhang Du,Cun Huang,Boyuan Duan,Chunxia Wang,Guoyong Huang,Yiming Yan,Shengming Xu
To overcome the low current-density efficiency and long-term stability issues of industrial overall water splitting at ampere-level current density, a kind of superwetting Mo-doped nanoarray anchored on nickel foam (NF) (Mo-CoP/NC) with three-dimensional (3D) nanoflower structure is constructed. The incorporation of Mo species induces thermoneutral hydrogen adsorption free energy and creates favorable empty d-orbitals, which enhances the d–p hybridization of Co–O bonds, thereby accelerating the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) kinetics in alkaline media. The optimized Mo-CoP/NC exhibits exceptional electrocatalytic performance, requiring low overpotentials of 198 mV for HER and 384 mV for OER at a current density of 1000 mA cm–2 and achieving maintains robust operation in overall water splitting at 3000 mA cm–2. When employed as a bifunctional catalyst in an alkaline electrolyzer, a cell voltage of 1.87 V can be realized at 1000 mA cm–2 , outperforming commercial benchmarks. Density functional theory (DFT) calculations reveal that Mo doping optimizes hydrogen adsorption energy and reduces energy barriers for water dissociation. The superwetting surface ensures rapid gas bubble detachment and efficient active site regeneration, while N-doped carbon encapsulation endows long-term stability with negligible activity decay over 100 h of continuous operation.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
Journal of Electrochemical Science and Technology
·
2024
·Vol. 15
·期 3
·353-364
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IF 2.2
Baikai Zhang,Xiaohui Li,Maochang Liu
Through component regulation and morphological construction, it is of considerable significance to develop high-activity and high-stability electrocatalyst for hydrogen evolution in electrolytic water. In the hydrothermal process, Mo-doped nickel-based sulfide catalysts (Mo-NiS-Fx) with a variety of morphologies (prisms, rods, flakes, and cones) were created by adding NH4F with varying masses. Among these, the flaky Mo-NiS-F1.2 exhibited exceptional performance towards electrochemical hydrogen evolution reaction, surpassing most similar catalysts with an overpotential of 79 mV at 10 mA cm-2 and a Tafel slope of 49.8 mV dec-1. Significantly, Mo-NiS-F1.2 maintained its high activity for hydrogen evolution over 60 h at a current density of 10 mA cm-2, making it suitable for widespread commercial application. According to the experimental findings, an electrocatalyst with a high surface area and a porous structure is better suited to exposing more gas transfer routes and active sites, which would encourage the hydrogen evolution reaction. This study presents a straightforward procedure for creating electrocatalysts with a range of morphologies, which can serve as a model for the creation of catalysts for use in industrial manufacturing.
研究领域:
材料科学
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电化学
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DOI
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 4
·e202405183
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IF 2
Jingwen Zhang,Zeyang He,Hao Fu,Wei Kong,Petr Senin,Arkadii Proskurin,Ting Bian,Shitan Yan
Graphical Phosphomolybdic acid doping and co-etching with thioacetamide at low temperatures resulted in the formation of uniformly Mo-doped CoS₂ nanoparticles exhibiting a hollow structure that increased the number of active sites and provided abundant reaction sites. In terms of performance, Mo-CoS₂ exhibits the competitive OER and HER properties for an efficient overall water splitting. Nowadays, the sluggish hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) kinetics are the key obstacles limiting the commercial application of water splitting. In this study, a size-matching strategy is proposed to construct the molybdenum-doped CoS 2 polyhedra (Mo-CoS 2 ) by encapsulating polyoxometalate (POM, H 3 PMo 12 O 40 ) guests into mesoporous zeolite imidazolium framework-67 (ZIF-67), with thioacetamide (TAA) serving as a gentle sulfur source. The catalyst exhibits a pronounced hollow structure due to the synergistic etching effects of POM and TAA, which can increase the number of active sites. Additionally, the incorporation of Mo optimizes the electronic structure, thereby improving both HER and OER performance. In alkaline electrolytes, Mo-CoS 2 delivers an overpotential of 330 mV and 269 mV for OER and HER, respectively, to produce a current density of 100 mA cm −2 . Moreover, Mo-CoS 2 demonstrates exceptional performance in overall water splitting, achieving a cell voltage of 1.55 V at 10 mA cm −2 , along with outstanding long-term stability. This study provides a promising avenue for the structural and component optimization of cobalt sulfide, which could significantly improve the efficiency of hydrogen production.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
ENERGY & FUELS
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2022
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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
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DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2022
·Vol. 38
·期 3
·823-828
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IF 2.726
Hao Zhimin,Liu Dapeng,Ge Huaiyun,Zuo Xintao,Feng Xilan,Shao Mingzhe,Yu Haohan,Yuan Guobao,Zhang Yu
Molybdenum doping is an effective way to improve the oxygen evolution reaction(OER) properties of catalysts, which can efficiently improve the electronic conductivity, mass transport process, and intrinsic activity of transition metal oxides or hydroxides, especially for those multi-component oxides with more abundant active sites. Herein, we have prepared a quaternary FeCoMoCu metal oxide on Cu foam(FeCoMoCuO x @Cu) as an efficient OER catalyst. As expected, FeCoMoCuO x @Cu could exhibit a low overpotential(252 mV at the current density of 10 mA/cm 2 ) and exceptional stability(10000 cycles of CV scans or constant electrolysis for 48 h).
研究领域:
材料科学
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电化学
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DOI
高影响因子
ChemPlusChem
·
2023
·Vol. 88
·期 3
·e202300023
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IF 3.4
Cheng Nan,Huimin Yang,Fanfan Gao,Nan Gao,Wenjing Zhou,Haiyan Du,Zhenhai Liang
Graphical A series of molybdenum - doped CeO 2 nanorod catalysts were successfully fabricated via a hydrothermal reaction coupled with high temperature calcination. The obtained 5 %-Mo-CeO 2 nanorods provide as a superior electrocatalyst in neutral electrolytes of 0.1 M Na 2 SO 4 . Such electrocatalyst significantly enhances nitrogen reduction reaction performance with an NH 3 yield of 10.9 μg h −1 mg −1 cat at −0.45 V vs reversible hydrogen electrode (RHE) and a Faradaic efficiency of 26.5 % at −0.25 V vs RHE, much higher 4 times than of CeO 2 nanorods (2.6 μg h −1 mg −1 cat ; 4.9 %). As a green and sustainable strategy, the electrocatalytic N 2 reduction reaction (NRR) has been considered the best potential approach to replace the traditional Haber-Bosch process under ambient conditions. The key is to exploit efficient and low-cost electrocatalysts according to the current situation. Herein, a series of Molybdenum (Mo) doped CeO 2 nanorods (NR) catalysts were successfully fabricated via a hydrothermal reaction coupled with high temperature calcination. The nanorod structures were not altered after Mo atom doping. The obtained 5 %-Mo-CeO 2 nanorods act as a superior electrocatalyst in neutral electrolytes of 0.1 M Na 2 SO 4 . Such electrocatalyst significantly enhances NRR performance with an NH 3 yield of 10.9 μg h −1 mg −1 cat at −0.45 V vs reversible hydrogen electrode (RHE) and a Faradaic efficiency (FE) of 26.5 % at −0.25 V vs RHE. That outcome is 4 times higher than that of CeO 2 nanorods (2.6 μg h −1 mg −1 cat ; 4.9 %). Meanwhile, density functional theory (DFT) calculation shows the characteristics after Mo doping: the band gap value lowers, the density of states increases, electrons are more easily excited, and N 2 molecules are more easily adsorbed, thereby enhancing the activity of the electrocatalytic NRR.
研究领域:
材料科学
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电化学
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理论计算
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DOI
PubMed
高影响因子
CHEMICAL PHYSICS LETTERS
·
2022
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IF 2.719
Min Wang,Beiyang Guo,Jiayu Zhan,Yuan Zhuang,Sridhar Komarneni,Jianfeng Ma
Mo-doped BiOBr nanoflowers were prepared by hydrothermal method with various Bi:Mo molar ratios, and their degradation efficiency of tetracycline under visible light was investigated using K 2 S 2 O 8 activation. Among the above series of catalysts, the sample containing 2% Mo dopant exhibited the optimum photocatalytic activity, which could efficiently remove tetracycline (TC) within 40 min. The mechanism of photocatalytic activity can be well explained by the generation of superoxide radicals (O 2 − ), sulfate radicals (SO 4 − ), hydroxyl radicals ( OH) and holes (h + ), which are responsible for the degradation of TC. In addition, the 2 %Mo-BiOBr catalyst has good recycling stability.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Yinghao Tao,Wendan Jiang,Hui Wang,Weiju Hao,Qingyuan Bi,Xinjuan Liu,Jinchen Fan,Guisheng Li
As a typical spinel oxide, nickel cobaltite (NiCo 2 O 4 ) is considered to be a promising and reliable oxygen evolution reaction (OER) catalyst due to its abundant oxidation states and the synergistic effect of multiple metal species. However, the electrocatalytic OER performance of NiCo 2 O 4 has always been limited by the low specific surface area and poor intrinsic conductivity of spinels. Herein, the hedgehog-like molybdenum-doped NiCo 2 O 4 (Mo-NiCo 2 O 4 ) catalyst was prepared as an efficient OER electrocatalyst via a facile hydrothermal method followed with high-temperature annealing. The Mo-NiCo 2 O 4 -0.075 with Mo doping concentration of ∼ 1.95 wt% exhibits excellent OER performance with a low overpotential of 265 mV at a current density of 10 mA·cm −2 and a Tafel slope of 126.63 mV·dec -1 , as well as excellent cycling stability. The results demonstrated that the hedgehog-like structure provides Mo-NiCo 2 O 4 with the high surface area and mesopores that enhance electrolyte diffusion and optimal active site exposure. The in-situ Raman spectra and density functional theory calculations show that the Mo cations doping improve the intrinsic conductivity of the NiCo 2 O 4 while modulating the chemisorption of intermediates. Meanwhile, the energy barriers of *OH and O* formation decrease significantly after Mo doping, effectively facilitating water dissociation and optimizing the reaction kinetics.
研究领域:
材料科学
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电化学
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催化科学
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产品关联
DOI
PubMed
高影响因子
Carbon Energy
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2023
·
IF 20.5
Zhichao Jia,Yang Yuan,Yanxing Zhang,Xiang Lyu,Chenhong Liu,Xiaoli Yang,Zhengyu Bai,Haijiang Wang,Lin Yang
Transition-metal oxyhydroxides are attractive catalysts for oxygen evolution reactions (OERs). Further studies for developing transition-metal oxyhydroxide catalysts and understanding their catalytic mechanisms will benefit their quick transition to the next catalysts. Herein, Mo-doped CoOOH was designed as a high-performance model electrocatalyst with durability for 20 h at 10 mA cm −2 . Additionally, it had an overpotential of 260 mV (glassy carbon) or 215 mV (nickel foam), which was 78 mV lower than that of IrO 2 (338 mV). In situ, Raman spectroscopy revealed the transformation process of CoOOH. Calculations using the density functional theory showed that during OER, doped Mo increased the spin-up density of states and shrank the spin-down bandgap of the 3d orbits in the reconstructed CoOOH under the electrochemical activation process, which simultaneously optimized the adsorption and electron conduction of oxygen-related intermediates on Co sites and lowered the OER overpotentials. Our research provides new insights into the methodical planning of the creation of transition-metal oxyhydroxide OER catalysts.
研究领域:
材料科学
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电催化
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Guanghui Li,Changye Mang,Lang Xing,Pengxu Cao,Yongfeng Cai,Jun Luo,Hao Jiang
Methylene blue (MB) is extensively used in the textile industry; meanwhile, it is also one of carcinogenic and mutagenic pollutants. The removal of MB from wastewater by photocatalytic decomposition under visible light irradiation is a very important method. In this work, a photocatalyst of Mo-doped TiO 2 coated on fly ash cenosphere (CTAB-Mo-TiO 2 /FAC) was prepared by a sol-gel method and modified by hexadecyl trimethyl ammonium bromide (CTAB). Compared to TiO 2 /FAC and Mo-TiO 2 /FAC (without CTAB), it was featured by low bandgap and strong light absorption ability. More importantly, the light absorption range broadened from 200 to 400 nm to 200–800 nm, which could absorb visible light . Besides, after adding CTAB, the Mo 6+ could more easily dope into the TiO 2 lattice and cause crystal distortion, which exposed more oxygen vacancies . Oxygen vacancies could generate abundant reactive radicals to enhance the photocatalytic activity . At CTAB-Mo-TiO 2 /FAC dosage of 2 g/L, 99.75% of MB was removed in an initial MB concentration of 0.03 mmol/L with a pH of 7.0 under visible light irradiation of 60 min, whereas that of Mo-TiO 2 /FAC and TiO 2 /FAC was only 42 % and 24 %, respectively. The photodynamic parameter of CTAB-Mo-TiO 2 /FAC (0.066 min −1 ) is about 3 times of Mo-TiO 2 /FAC (0.023 min −1 ), 8.3 times of TiO 2 /FAC (0.008 min −1 ).
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Journal of the Iranian Chemical Society
·
2024
·Vol. 21
·期 12
·2943-2953
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IF 2.2
Pu Hongmei,Cui Yifan,Wang Haidan,Yu Lijuan,Yang Dezhi,Yang Yaling,Li Hong
Until now, there have been many reports on the regulation of inorganic metal ions on the catalytic activity of nanozymes, but few reports on the regulation of anions (such as NO 2 − ) on enzyme activity. In this work, a copper-molybdenum doped carbon dots (Cu, Mo-CDs) with peroxidase-like (POD) activity was synthesized by simple one-step microwave digestion method. The Cu, Mo-CDs + NO 2 − system can promote 3,3′,5,5′-tetramethylbenzidine (TMB) oxidizing to blue oxidative product (oxTMB) due to the formation of ∙NO 2 free radical. While Hg 2+ was introduced into the system, the POD-like activity of Cu, Mo-CDs + NO 2 − system was inhibited due to the strong interaction and the electron transfer between Cu, Mo-CDs and Hg 2+ . The formation of ∙NO 2 and the electron transfer capability of Cu, Mo-CDs + Hg 2+ were confirmed through ESR spectra and FMN experiments. The bioenzyme-free colorimetric assay based on Cu, Mo-CDs nanozyme is used for detection of NO 2 − and Hg 2+ , showing lower detection limit (LOD) of 1.63 µg/L for NO 2 − , 0.13 µg/L for Hg 2+ , respectively and good recovery from 90.79 to 108.90%. The work paves a new way to design a nanozyme-based colorimetric protocol for traces NO 2 − and Hg 2+ residues in food analysis.
研究领域:
分析化学
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环境科学
·
食品科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Wangqiong Xu,Xianrong Li,Baiyan Guo,Beituo Liu,Ruiming Yang,Shimei Guo,Zhe Li,Ruijuan Qi,Rong Huang
Critical barriers to the extensive applications of the spinel LiMn 2 O 4 cathodes include grievous capacity degradation and structural collapse. Bulk elemental doping combining surface modification, which is a common approach to address these challenges. Here, synchronous bulk Mo-doped and in-situ surface reconstructed layer coated LiMo 0.02 Mn 1.98 O 4 cathodes are prepared by tuning the annealing temperatures. Using the spherical aberration-corrected scanning transmission microscopy (Cs-STEM) technique, we demonstrate that part of Mo 6+ ions dopes into the octahedral Mn 16d sites to form LiMo 0.02 Mn 1.98 O 4 that strengthens bulk structural stability. The other part of Mo 6+ ions or the Mn atom occupying the Mn 16c sites of the spinel to form a surface reconstructed layer on the outermost surface that suppresses the side reaction and slows down the decomposition of the electrolyte. Specifically, the LiMo 0.02 Mn 1.98 O 4 cathode calcined at 750 °C with an appropriate surface reconstructed layer exhibits an outstanding capacity retention of 76.28 % after 1000 cycles at 10C at 25 °C. Our work provides a simple and novel way toward high electrochemical performance tuning for spinel LiMn 2 O 4 cathodes.
研究领域:
材料科学
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电化学
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DOI
高影响因子
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