INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Hong Wang,Yuzhen Zhang,Guanping Wu,Li Guo,Yanzhong Wang
The development of stable and efficient electrocatalysts based on metal-organic frameworks represents a main challenge for the overall water splitting process. Here, the ferrocene-based nickel metal-organic framework (NiFc-MOF) on nickel foam (NF) was synthesized using nickel chloride and 1, 1′-ferrocenedicarboxylic acid (FcDA) via a simple solvothermal method, and Ru nanoparticles (NPs) were reduced by FcDA and in situ grown on the surface of NiFc-MOF nanosheets. The as-prepared cactus-like Ru 0.3 @NiFc-MOF exhibits high electrocatalytic activity for hydrogen evolution reaction (HER) with a low overpotential of 25 mV@10 mA cm −2 and a Tafel slope of 45.05 mV dec −1 . To reach a current density of 10 mA cm −2 for the oxygen evolution reaction (OER), a low overpotential of 210 mV was required. The assembled water electrolysis cell using Ru 0.3 @NiFc-MOF as bifunctional electrocatalysts only requires a voltage of 1.47 V to achieve a current density of 10 mA cm −2 , indicating excellent electrolytic water splitting performance. In addition, the electrocatalytic activity of Ru 0.3 @NiFc-MOF's can keep the stability for 120 h Ru 0.3 @NiFc-MOF exhibits exceptional electrocatalytic performance, which can be attributed to both the intrinsic activity of Ru sites and the multiple active sites of NiFc-MOF.
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Xinyu Wang,Junhua You,Jiali Ren,Yanjun Xue,Jian Tian,Hangzhou Zhang
In this paper, the Ru/RuS 2 nanoparticles as dual co-catalysts were self-assembled on the surface of g-C 3 N 4 nanotubes (Ru/RuS 2 /g-C 3 N 4 NTs) for photocatalytic H 2 production. The Ru/RuS 2 /g-C 3 N 4 NTs showed greatly enhanced photocatalytic H 2 production activity (1409 μmol·g −1 ·h −1 ), 1.16 times of RuS 2 /g-C 3 N 4 NTs (1212 μmol·h −1 ·g −1 ), 10.51 times of Ru/g-C 3 N 4 NTs (134 μmol·g −1 ·h −1 ), and 82.88 times of the pure g-C 3 N 4 NTs (17 μmol·g −1 ·h −1 ). Besides, the apparent quantum yield value (AQE) of Ru/RuS 2 /g-C 3 N 4 NTs is 3.92% at 370 nm. Ru/RuS 2 as dual co-catalysts are self-assembled on the surface of g-C 3 N 4 NTs and show strong electronic synergistic interaction between the interfaces, reduce Δ G H* of RuS 2 and desorption energy of Ru, and promote the selectivity and activity of HER kinetically and thermodynamically respectively, which exhibits higher photogenerated carrier concentration and lower charge migration resistance than RuS 2 and Ru, showing the synergistic effect to facilitate the generation and migration of carriers and provides active sites for photocatalysis .
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Zichen Wang,Suhao Chen,Runzhe Chen,Haoran Jiang,Yinghui Jiang,Qiliang Wei,Wei Wu,Jun Zhong,Niancai Cheng
The sluggish kinetics of the oxygen evolution reaction (OER) caused by the complex process significantly hinder the advancement of electrolytic water to hydrogen technology. Herein, the valence of Ru is modulated and stabilized through inducing the electronic competition between Mo and Ru, and the charge transfer from Fe, Co, and Ni to Ru in 2D porous FeCoNiMoRu high entropy oxides (HEO) nanosheets to achieve efficient and stable OER. The 2D porous structure of FeCoNiMoRu HEO contributes to the high exposure of active sites while promoting rapid mass transfer, which can facilitate oxygen-evolving kinetics of the catalyst. Consequently, the optimized catalyst (FeCoNiMoRu HEO) surpasses RuO 2 (315 mV) in OER catalytic activity, exhibiting an overpotential of 226 mV at 10 mA cm −2 . Notably, the mass activity of FeCoNiMoRu HEO is nearly 18.6-fold that of RuO 2 . Combined experimental and theoretical analysis, a charge competition between Mo and Ru atoms, and the charge transfer from Fe, Co, and Ni elements to Ru in HEO can buffer the change of valence of Ru and modulate its electronic structure, thus enhancing the activity and durability of FeCoNiMoRu HEO during OER.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Xiang Xu,Jingxu Tian,Zijie Sun,Kueasook Ratchadaporn,Peng He,Zheng Zeng,Liqing Li
The expensive material costs of precious metals long limit their use as catalysts. The development of High-Entropy Alloy (HEA) materials provides a feasible approach to combine high performance and lower cost. Therefore, Ru-containing HEA nanoparticles are synthesized on carbon nanofibers. Among them, Ru 0.2 @CNFs reveals the best catalytic oxygen evolution reaction (OER) performance and extraordinary stability for the 1000th cycle. Moreover, the Ru-containing multimetallic catalyst models are calculated based on crystal information obtained from X-ray diffraction result. The great electrocatalytic potential of the Ru 0.2 <1 1 1> crystal face is indicated by the density of states and d-band center, which might benefit from the stronger atomic interaction caused by high-entropy mixing. The largest configuration entropy of Ru 0.2 HEA (1.58 R ) gives a reasonable explanation for its remarkable stability in OER electrocatalysis. In addition, the similar adsorption energies of *OH demonstrate the abundant active sites on the surface of RuFeCoNiCu HEA. As a result, the high-entropy material Ru 0.2 @CNFs can provide potential nanocatalysts with reduced noble metal loading for practical applications. Besides, significant insights for performance prediction in other high-entropy materials are given by the modeling and calculations of HEAs.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Longyang Liu,Zichen Wang,Xueyan Zhang,Lijie Luo,Yongjun Chen
Highly active and stable electrocatalysts are highly desired for the hydrogen evolution reaction (HER) in water electrolysis. In this study, a ruthenium-ruthenium phosphide heterojunction (Ru-Ru 2 P) anchored on phosphorus-doped graphene (PCSG) was fabricated via a mild molten salt template method. The graphene was synthesized from discarded coconut shells sourced from Hainan. We found that the heterojunction structure could accelerate electron transfer, while the graphene provided more exposed active sites, significantly enhancing the HER activity of the catalyst. The catalyst prepared at 800 °C with 30 mg of RuCl 3 (Ru-Ru 2 P/2D-PCSG-800) exhibited low HER overpotentials of 31 mV in alkaline and 57 mV in acidic electrolytes at a current density of 10 mA cm −2 , respectively, which were comparable to those of commercial 20 % Pt/C catalyst (36 mV in alkaline and 40 mV in acidic electrolytes). Moreover, the catalyst demonstrated high stability with no significant change in current density after 125 hours of operation. Density functional theory calculations revealed that the Ru-Ru 2 P heterojunction could rearrange charge and modify the Ru d -band center, optimizing the adsorption energy of active *H (|ΔG *H |) and breakage energy of *H-OH bond (ΔG H2O ).
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DOI
高影响因子
Molecular Catalysis
·
2018
·
IF 0
Yueying Han,Sihan Yu,Lichao Liu,Shijia Zhao,Tianxiao Yang,Yajing Yang,Yunming Fang,Shanshan Lv
A significant challenge remains to protect proteins (including enzymes) from inactivation against pH. This study investigated stabilization against pH denaturation of carbonic anhydrase (CA) in silk fibroin (SF)-based hydrogels. CA was immobilized into SF-based hydrogels by a Ru(II) mediated photochemical method, giving rise to ∼100% immobilization efficiency and >60% activity of the free enzyme at the optimum pH value of 8. At an unfavorable acidic pH value of 3, the immobilized CA achieved >20% of the initial activity and ∼8% in the second cycle even after 12 h storage, while the free enzyme lost its activity completely. Fourier transform infrared spectroscopy (FTIR) results suggested that the protective effect of the SF-based hydrogels on the pH stability of CA could be attributed to unique structural feature of the SF molecules, enabling strong intermolecular interactions between SF and CA, and thus increasing protein rigidity against pH denaturation. The same approach was applied to lysozyme and xylanase, and achieved protein stabilization of both enzymes at an unfavorable basic pH value of 9. The SF-based hydrogels demonstrated great potential as a promising matrix for protein immobilization against pH denaturation.
研究领域:
材料科学
·
生物化学
·
生物技术
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DOI
APPLIED CATALYSIS A-GENERAL
·
2017
·
IF 4.339
Tianye Guo,Qineng Xia,Yi Shao,Xiaohui Liu,Yanqin Wang
A new route is reported for the direct deoxygenation of lignin model compounds to aromatic hydrocarbons via the catalytic hydrogen transfer reactions over Ru/Nb 2 O 5 -SiO 2 catalyst with 2-PrOH as a hydrogen donor. It is found that Ru/Nb 2 O 5 -SiO 2 catalyst is active for the hydrodeoxygenation of p -cresol with 98.5% conversion and 84.0% yield of toluene at 230 °C, owing to the significant promotion effect of NbO x species on C O bond cleavage and the proper transfer hydrogenation activity of Ru. Furthermore, Ru/Nb 2 O 5 -SiO 2 catalyst also shows excellent performances in the transfer hydrodeoxygenation of various lignin model compounds such as 2-methoxy-4-methyl phenol, benzyl phenyl ether (α-O-4 model compound), 2-(2-methoxyphenyl)oxy-1-phenethanol (β-O-4 model compound) and even the real lignin extracted from birch, into aromatic hydrocarbons with 2-PrOH as the hydrogen donor. The reaction pathway studies of these model compounds demonstrate that the direct deoxygenation (DDO) is the main reaction route over Ru/Nb 2 O 5 -SiO 2 catalyst in the presence of 2-PrOH. Here, using 2-PrOH as a hydrogen source is found to be more selective to aromatic hydrocarbons than using molecular hydrogen. This work provides a new way for the high selective production of aromatic hydrocarbons from renewable lignin via the catalytic hydrogen transfer reactions.
研究领域:
化学工程
·
催化
·
可再生能源
·
有机化学
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DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2021
·
IF 6.986
Xinyang Zhu,Huanhuan Xing,Yuan Xue,Jing Li,Erkang Wang,Shaojun Dong
A chemical fixation strategy originating from single-atom-anchoring with metal–organic frameworks as a carrying matrix was proposed for solid-state electrochemiluminescence (ECL). Herein, UiO-67(N) with the exposure of 2,2′-bipyridine (bpy) ligands could coordinate with Ru2+ to form a local structure of [Ru(bpy)3]2+ (Ru-UiO). The influence of the steric effect induced with different Ru sources was discussed. The as-obtained Ru-UiO exhibits high ECL intensity and outstanding stability in the presence of a coreactant at low concentrations. The proposed synthesis strategy may hold great potential for the synthesis of solid-state ECL materials and their further utilization in ECL analysis.
研究领域:
材料科学
·
分析化学
·
电化学
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DOI
PubMed
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 114
·94338-94343
·
IF 3.84
Qinghong Wang,Xia Lin,Dongmei Guo,Juanjuan Xu,Chunzhi Xuan,Cui Chen,Yingzi Fu
A sensitive, stable and stereoselective electrochemiluminescence (ECL) sensor has been designed to enantioselectively discriminate proline enantiomers by immobilizing Ru(bpy)32+–gold nanoparticles (Ru–AuNPs) and β-cyclodextrin–reduced graphene oxide (β-CD–rGO) on glassy carbon electrode. More Ru(bpy)32+ could be immobilized on the surface of electrode stably via preparing Ru–AuNPs and better stereoselectivity could be introduced to the sensor via the synthesis of β-CD–rGO. When the developed sensor interacted with proline enantiomers, obvious difference of ECL intensities towards L- and D-proline was observed, and a larger intensity was obtained from D-proline. As a result, ECL technique might act as a promising method to chiral recognition of amino acids enantiomers or chiral drugs.
研究领域:
分析化学
·
生物传感
·
材料科学
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DOI
高影响因子
INORGANIC CHEMISTRY
·
2021
·
IF 5.165
Shen-Jing Ji,Dong Zhang,Nian-Tzu Suen
Transition metal-based intermetallics are promising electrocatalysts for replacing the commercial Pt metal in the hydrogen evolution reaction (HER). In this work, RENi2 and RERu0.25Ni1.75 (RE = Pr, Tb, and Er) were synthesized and their electrocatalytic HER activities were explored. Among undoped compounds, PrNi2 exhibits the best performance and requires an overpotential of 55 mV, while partially replacing Ni with Ru element (PrRu0.25Ni1.75) can greatly reduce the overpotential to 20 mV at a current density of 10 mA/cm2. Such enhancement was recognized that belongs to their extrinsic property, and their intrinsic HER activities were similar after normalizing the electrocatalytic surface area. Further investigation on ScM2 and ScRu0.25M1.75 (M = Co and Ni) suggests that doping Ru element in ScCo2 will significantly enhance antibonding character around the Fermi level (EF) and weaken hydrogen adsorption energy. On the other hand, the antibonding population for ScNi2 and ScRu0.25Ni1.75 is similar at EF, which accounts for their close intrinsic HER activities.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
Polish Journal of Chemical Technology
·
2017
·Vol. 19
·期 4
·75-79
·
IF 0.725
Chuan-Jun Yue,Qiu-Neng Xu,Li-Ping Gu,Jin-Fang Wang
The efficient reuse of homogeneous catalyst is important. Cation complex of [Ru(η6-p-cymene)(PPh3)(CH3CN) Cl]PF6 with different ligands was synthesized and characterized by infrared spectroscopy (IR), 1H-, 13C- and 31P-nuclear magnetic resonance spectroscopy (1H-, 13C- and 31P-NMR), element analysis (EA), and high resolution mass spectrometry (HR-MS). The complex was used as a catalyst for the hydrogen transfer reduction of carbonyl for the first time, presenting an excellent catalytic performance of 89%–98% conversion of acetophenone and its derivatives. The catalyst may be efficiently reused by the electro-adsorption of 10 times to one catalyst recovery. The cation [Ru] complex presented advantages of both homogeneous and heterogeneous catalysts.
研究领域:
化学
·
催化材料
·
有机合成
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DOI
高影响因子
Journal of Nanostructure in Chemistry
·
2022
·Vol. 13
·期 6
·577-589
·
IF 8
Tian Ruonan,Gao Zeyuan,Lang Ruifeng,Li Na,Gu Huilin,Chen Gang,Guan Hongtao,Comini Elisabetta,Dong Chengjun
Lately novel strategies to enhance the sensing properties on iron oxide have been proposed to achieve high performance gas sensors for acetone detection. In this working report, the synthesis of iron-glycerate (Fe-Gly) using glycerol to combine with Fe 3+ is first presented. Depending on the thermal treatment, this compound can evolve into γ-Fe 2 O 3 , α/γ-Fe 2 O 3 and α-Fe 2 O 3 . α/γ-Fe 2 O 3 shows better sensing performance as far as acetone detection is concerned. Using the dual phases of α/γ-Fe 2 O 3 as a fundamental building block, their sensing properties were further improved using Ni doping and Ru nanoparticles functionalization. The high response and selectivity to acetone detection was ascribed to the synergistic effects of unique nanosheets, mixed phases, rich oxygen vacancies and excellent catalytic activity of Ru nanoparticles. Graphical abstract
研究领域:
材料科学
·
纳米技术
·
传感器
·
化学工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）