APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jing Tian,Feng Qian,Meijing Cao,Jiaqi Gong,Jiarun Li,Lei Wang,Minge Tian,Zhuoyuan Chen
Most of the photoelectrodes for photoelectrochemical cathodic protection (PECCP) technology reported at present cannot store electrons, leading to the inability to protect metals in the absence of light, which becomes the main defect that limits the practical application of PECCP . In this work, a Mo doping WO 3 /CdZnS heterojunction photoelectrode with electrons storage capability was prepared, by which the PECCP can be kept running in the absence of light. The result of theoretical calculation of density functional validates that Mo doping can introduce new doping levels into WO 3 , leading to modifications in the intrinsic electronic structure associated with increasing capacitance and conductivity. The compounding of CdZnS can not only broaden the light absorption threshold of the photoelectrode, but also charge the Mo-WO 3 . Besides, the construction of heterojunction also facilitates the oriented separation and migration of photogenerated carriers. The 0.3%Mo-WO 3 /CdZnS-2 composite photoelectrode with desirable capacity of electron storage can store the quantity of electric charge about 1.87 × 10 −3 C after 100 s illumination, which is about 1.5 times of WO 3 /CdZnS-2 without Mo doping. In the meanwhile, the persistent PECCP performance in the absence of light was also prolonged from 481 s to 584 s.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
AICHE JOURNAL
·
2025
·
IF 4
Biao Yang,Ze-Peng Bai,Run-Dong Cui,Xiao-Fei Zeng,Jie-Xin Wang
Hydrogen production via water electrolysis is limited by the high energy barrier of the oxygen evolution reaction (OER). As an emerging oxide material, high-entropy oxides (HEOs) are regarded as promising OER electrocatalysts owing to the multielement synergistic effect. Herein, a facile approach is proposed to synthesize Mo-doped high-entropy spinel oxide Mo-(FeCoNiCrMn) 3 O 4 nanoparticles (Mo-HEO). Interestingly, only low-content Mo doping into HEO can reduce the crystallite size, prevent particle agglomeration, and modulate the electron structure. Consequently, the electrocatalyst of 6% Mo-HEO exhibits superior OER performance with overpotentials of only 280 and 324 mV at 10 and 100 mA cm −2 . In situ Raman spectroscopy confirms the transformation of surface spinel sites to metal oxyhydroxide, highlighting the Mo-driven surface reconstruction. Furthermore, Mo doping as a versatile strategy has been successfully extended to other spinel oxides with significant activity improvements, offering a great potential in the development of spinel-typed HEO electrocatalysts.
研究领域:
材料化学
·
电化学
·
能源科学
·
纳米催化
·
无机功能材料
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 33
·2101532
·
IF 18.808
Jin Wang,Mengke Zhang,Guanglong Yang,Wenwu Song,Weiting Zhong,Xunyue Wang,Minmin Wang,Tongming Sun,Yanfeng Tang
Highly efficient electrocatalysts composed of earth-abundant elements are desired for water-splitting to produce clean and renewable chemical fuel. Herein, a heteroatomic-doped multi-phase Mo-doped nickel phosphide/nickel sulfide (Mo-NiP x /NiS y ) nanowire electrocatalyst is designed by a successive phosphorization and sulfuration method for boosting overall water splitting (both oxygen and hydrogen evolution reactions (HER)) in alkaline solution. As expected, the Mo-NiP x /NiS y electrode possesses low overpotentials both at low and high current densities in HER, while the Mo-NiP x /NiS y heterostructure exhibits high active performance with ultra-low overpotentials of 137, 182, and 250 mV at the current density of 10, 100, and 400 mA cm −2 in 1 m KOH solution, respectively, in oxygen evolution reaction. In particular, the as-prepared Mo-NiP x /NiS y electrodes exhibit remarkable full water splitting performance at both low and high current densities of 10, 100, and 400 mA cm −2 with 1.42, 1.70, and 2.36 V, respectively, which is comparable to commercial electrolysis.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jiabing Luo,Yongxiao Tuo,Jianchao Zhang,Wenle Li,Shutao Wang,Yanpeng Li,Yuan Pan,Yan Zhou,Jun Zhang
The development of efficient and low-cost overall water splitting electrocatalysts for an anion exchange membrane (AEM) electrolyzer is desirable for hydrogen production. The control of geometric and electronic structures of electrocatalysts can improve the catalytic efficiency of hydrogen evolution reaction (HER) and durability in oxygen evolution reaction (OER). Spatially confined growth and heteroatom doping can achieve this prospect of the target electrocatalysts. Herein, we prepared a carbon-shell confined Mo-doped CoP electrocatalyst (Mo-CoP@C) via an anion adsorption coupled pyrolytic phosphorization method. A Metal-Organic Framework (MOF) of Co was used to achieve Mo doping and carbon-shell encapsulation. Mo doping significantly altered the electronic structure of CoP, which produced a local polarized environment for water dissociation during alkali HER process. Meanwhile, carbon-shell confined growth and provided a protective layer for durable OER process. Consequently, Mo-CoP@C exhibits attractive alkali electrocatalytic HER and OER activities with the overpotentials of 122 and 280 mV at 0.01 A cm −2 . Finally, the assembled Mo-CoP@C-CP‖Mo-CoP@C-TFF AEM electrolyzer could operate for 500 h at 0.1 A cm −2 .
研究领域:
材料科学
·
电化学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Jinshuo Bai,Yinan Zhang,Zixin Pan,Xiangru Yin,Guixiang Yang,Dequan Zhang,Hua Zhou,Xiaoping Liang
Amorphous tungsten trioxide (a-WO 3 ) films were prepared on ITO conductive glass via electrodeposition and subsequently crystallized to obtain crystalline WO 3 (c-WO 3 ) films by heating a-WO 3 . A dual-phase stacked WO 3 film was fabricated by covering Mo-a-WO 3 film onto c-WO 3 /ITO substrate using electrodeposition and thermal-assisted electrodeposition methods, respectively. Optimization of electrochromic performance was achieved by varying Mo doping levels (0∼5 atom%). Results demonstrate that appropriate Mo doping (3 atom%) enhances the electrochromic properties of a-WO 3 films. Mo doping introduced structural distortions that reduced energy barriers and enhanced ion mobility, leading to improved electrochemical and electrochromic properties. The intermediate c-WO 3 layer improves adhesion between a-WO 3 top film and ITO glass substrate, while the porous structure of a-WO 3 layer increases the number of active sites for electrochromic reactions. Mo3-a-WO 3 /c-WO 3 dual-phase stacked film with doping 3 atom% Mo shows an optical modulation range of 83.4 % at 633 nm, a coloration efficiency of 74.3 cm 2 /C, rapid response time (bleaching/coloration: 3.4 s/6.1 s), and 86.6 % retention of its maximum current density after 2000 cycles, respectively. The high oxidation ion diffusion coefficient (3.53 × 10 −10 cm 2 /s) and reduction diffusion coefficient (1.55 × 10 −10 cm 2 /s) were also observed. This dual-phase stacked film shows significant improvements in electrochromic performance due to the synergistic effects between the dual phases and Mo-doping. Electrochromic device (ECD) assembled with Mo3-a-WO 3 /c-WO 3 dual-phase films as the working electrode, ITO glass as the counter electrode, and 1 mol/L LiClO4/PC solution as the electrolyte exhibited an optical modulation range of 74.2 % and response time (bleaching/ coloring) of 6.8 s/3.7 s. These findings confirm that ECD with Mo-a-WO 3 /c-WO 3 dual-phase films offer excellent electrochromic performance.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Shiwei Song,Yanhui Wang,Xiaoxu Liu,Xueqing Tian,Yucan Liu,Xiaodong Liu,Fanjia Sun,Yungang Yuan,Wei Li,Jianbing Zang
Seawater electrolysis achieves sustainable hydrogen production and seawater desalination in the context of the scarcity of freshwater resources, achieving two birds with one stone. In this study, we reported an Mo-doped NiFe-phosphate hollow bird-nest architecture consisting of porous nanosheets on NiFe-foam (Mo-NiFe-PO 3 /NFF) as an admired bifunctional electrocatalyst for overall seawater splitting. The introduction of Mo distorted the crystal structure of NiFe-phosphate, regulated the electronic environment around the Ni/Fe, and improved the electrocatalytic activity. Moreover, it also cooperated with phosphate polyanions to resist the Cl − from seawater and enhanced the corrosion resistance . The Mo-NiFe-PO 3 /NFF exhibited outstanding electrocatalytic performance for alkaline seawater electrolysis under a two-electrode system where only required 1.65 V voltage to drive 100 mA cm −2 . Particularly, the electrolyzer afforded industrially current density up to 500 mA cm −2 at a low voltage of 1.78 V, which were responsible for excellent durability up to 100 h. The bifunctional electrocatalyst in this study not only possessed high catalytic activity, but also effectively resisted the corrosion of Cl − in seawater.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Liuzhen Bian,Changyang Liu,Shuting Li,Jun Peng,Xiaowei Li,Lili Guan,Yuanyuan Liu,Ji Hua Peng,Shengli An,Xiwen Song
Reversible solid oxide cells (RSOCs) using identical material as both fuel electrode and air electrode have received extensive attentions due to their simplified fabrication process, increased compatibility between electrolyte and electrode. In this work, Molybdenum doped La 0.5 Sr 0.5 Fe 0.9 Mo 0.1 O 3-δ (LSFMo) symmetric electrode based on RSOCs is firstly designed and synthesized via sol-gel method. The effect of Molybdenum substitution at Fe-site on crystal structure, chemical stability, conductivity and electrochemical performance of La 0.5 Sr 0.5 FeO 3-δ oxide is thoroughly investigated. The structural stability of La 0.5 Sr 0.5 FeO 3-δ (LSF) in reducing condition is significantly enhanced after the incorporation of Mo 5+/6+ and the conductivity in 5% H 2 for LSFMo is ~7 times higher than that of undoped LSF. In addition, the polarization resistance value at 850 °C based on LSFMo/LSGM/LSFMo is 0.08 and 0.09 Ω cm 2 in air and wet H 2 , respectively. At 850 °C and 20%H 2 O–H 2 , a peak power density of 640 mW cm −2 is obtained in fuel cell mode, while a current density of −1000 mA cm −2 is attained at 1.3 V in electrolysis mode. Finally, the symmetric cell exhibits an excellent cycling reversible operation in both SOFCs mode and SOECs mode without detectable degradation.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2021
·Vol. 11
·期 9
·2404
·
IF 5.076
Liren Zheng,Minrui Wang,Yujie Li,Fahao Ma,Jiyu Li,Weiyi Jiang,Mu Liu,Hefeng Cheng,Zeyan Wang,Zhaoke Zheng,Peng Wang,Yuanyuan Liu,Ying Dai,Baibiao Huang
Monoclinic bismuth vanadate (BiVO4) is an attractive material with which to fabricate photoanodes due to its suitable band structure and excellent photoelectrochemical (PEC) performance. However, the poor PEC stability originating from its severe photo-corrosion greatly restricts its practical applications. In this paper, pristine and Mo doped BiVO4ceramics were prepared using the spark plasma sintering (SPS) method, and their photoelectrochemical properties as photoanodes were investigated. The as-prepared 1% Mo doped BiVO4ceramic (Mo-BVO (C)) photoanode exhibited enhanced PEC stability compared to 1% Mo doped BiVO4films on fluorine doped Tin Oxide (FTO) coated glass substrates (Mo-BVO). Mo-BVO (C) exhibited a photocurrent density of 0.54 mA/cm2and remained stable for 10 h at 1.23 V vs. reversible hydrogen electrode (RHE), while the photocurrent density of the Mo-BVO decreased from 0.66 mA/cm2to 0.11 mA/cm2at 1.23 V vs. RHE in 4 h. The experimental results indicated that the enhanced PEC stability of the Mo-BVO (C) could be attributed to its higher crystallinity, which could effectively inhibit the dissociation of vanadium in BiVO4during the PEC process. This work may illustrate a novel ceramic design for the improvement of the stability of BiVO4photoanodes, and might provide a general strategy for the improvement of the PEC stability of metal oxide photoanodes.Keywords:BiVO4photoanode;photoelectrochemical stability;spark plasma sintering (SPS);ceramics
研究领域:
材料科学
·
光电化学
·
陶瓷工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yilong Tian,Wenhui Yi,Qiuya Shao,Minghai Ma,Lei Bai,Rundong Song,Ping Zhang,Jinhai Si,Xun Hou,Jinhai Fan
The development of nanotherapeutics that can efficiently inhibit tumors and rapidly degrade in both cured and healthy tissues remains a research imperative. Herein, we developed tumor microenvironment (TME)-responsive Mo-doped W 18 O 49 nanobundles (MoWO NBs), which are co-assembled hyaluronic acid (HA) and doxorubicin (DOX) to achieve CT/FL imaging-guided multimodal cancer therapy. MoWO NBs exhibit multiple merits: (1) MoWO NBs degrade rapidly in the normal physiological environment but slowly in the weakly acidic TME, which leads to the selective accumulation of MoWO NBs at tumor sites and can prolong the therapeutic effect. (2) The existing Mo 4+ and W 5+ ions in MoWO NBs bestow the NBs with Fenton-like reaction activity to generate cytotoxic hydroxyl radicals (OH) from endogenous H 2 O 2 . Meanwhile, overexpressed glutathione (GSH) can reduce Mo 6+ and W 6+ ions in MoWO NBs to lower valence states, further enhancing the chemodynamic activity of MoWO NBs. (3) Under NIR-II laser irradiation, MoWO with a photothermal conversion efficiency of 45.5% could trigger powerful photothermal therapeutic effects in vitro and in vivo . (4) Owing to the fluorescence emission of DOX and the high Z-elements of molybdenum and tungsten, fluorescence (FL) imaging and computed tomography (CT) imaging have the potential to be used to monitor the biodistribution of Mo-W 18 O 49 @DOX@HA (MoWODH) in vivo . More importantly, the synergistic Chemo/PTT/CDT of MoWODH NCs greatly inhibited tumor growth. This work may broaden the path for smart nanomaterials and TME-responsive therapies.
研究领域:
生物医学工程
·
纳米医学
·
肿瘤学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Lumei Zhang,Chun Han,Zheng Ye,Dongzhe Cui,Junyuan Yang,Hao Xu,Haiyan Song,Zehua Guo,Xiaoliang Wu,Yunhe Zhao
The layered double hydroxides (LDHs) electrocatalysts have emerged as promising electrocatalysts for electrolytic water splitting due to their simple synthesis, high activity. However, traditional LDH-based catalysts face the low electrical conductivity and durability under electrolysis conditions. In this work, Mo–CoFe LDH was prepared by a two-step hydrothermal method, and the effect of different molybdenum content on its catalytic performance was studied. Among them, the OER and HER properties of Mo-CoFe LDH-1 are better than those of non-Mo doping. Mo–CoFe LDH-1 has the low HER and OER overpotentials are 192 mV and 134 mV, respectively at 10 mA cm −2 . In addition, using Mo–CoFe LDH-1 for water splitting can achieve a low voltage of 1.55 V at 10 mA cm −2 , and it also showed a good stability within 100 h. The excellent properties of Mo–CoFe LDH-1 is mainly due to the formation of 3D nanoflower structure and the doping of Mo element in CoFe LDH, significantly adjusting its electronic structure. This work is of great significance for the design of bifunctional LDHs-based electrocatalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 24
·9652-9657
·
IF 3.069
Zhengnan Wang,Xingbo Ge,Zhihao Li,Jing Wu,Zihao Liang,Shuang Wang
Developing a robust earth-abundant metal electrocatalyst for the hydrogen evolution reaction (HER) in both alkaline and acidic electrolytes is essential for pursuing the highly-efficient conversion of sustainable energy resources. The Mo-doped NiCu electrode was fabricated as a HER catalyst via a one-step electrodeposition process. The structure and the chemical state of the deposited catalysts were characterized by X-ray power diffraction, scanning electron microscopy and X-ray photoelectron spectroscopy. This Mo-doped NiCu electrode (8 at% Mo-content in solvent) exhibits outstanding electrocatalytic activity for the HER in an alkaline electrolyte as compared to bimetallic NiMo and NiCu catalysts, with a small overpotential of 95 mV at a current density of 10 mA cm−2 and excellent electrochemistry stability.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Wenhao Zhang,Yuanhao Tang,Liangmin Yu,Xin-Yao Yu
Nickel-based metal oxides/hydroxides are promising electrocatalysts for oxygen evolution reaction. However, their electrocatalytic activity for hydrogen evolution reaction (HER) is very poor. Herein, taking Mo-incorporated nickel hydroxide (Mo-Ni(OH) 2 ) as an example, a facile, time-efficient, and low-temperature H 2 /N 2 plasma activation strategy is developed to activate the HER performance by constructing heterostructure. This kind of heterostructure is composed of metal, metal alloy, metal nitride , and oxygen vacancy-riched metal hydroxide with more exposed catalytically active sites, enhanced mass activity, and accelerated electron transport. The optimized plasma-activated Mo-Ni(OH) 2 (P-Mo-Ni(OH) 2 ) manifests superior HER performance to pristine Mo-Ni(OH) 2 and even comparable to the benchmark Pt/C catalyst in alkaline solution. Moreover, when assembling a two-electrode urea-assisted water electrolysis system by using P-Mo-Ni(OH) 2 as both cathode and anode, the assembled cell only need a small voltage of 1.36 V to achieve a current density of 10 mA cm −2 and exhibits extremely stable catalytic performance up to 1000 h.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）