ACS Nano
·
2025
·
IF 16
Changxuan Ye,Shuang Yao,Xiong Xiao,Pei Zhu,Wen Zhang,Xian Yang,Changhua An
Ru-based clusters represent a class of promising electrocatalysts for pH-universal hydrogen evolution reaction (HER), yet their practical application is hindered by nanoparticle aggregation and strong oxygen affinity, leading to compromising activity and stability. This study proposes a strategy by integrating strong metal–support interactions with a built-in electric field (BIEF), in which the electrostatic interaction facilitates the design of a class of heterostructure catalysts comprising RuO2–x clusters and MoO3 on Ni(OH)2 (RuO2–x/MoO3–Ni(OH)2). Detailed characterizations reveal that the engineered BIEF induces charge redistribution, leading to the enhanced electron density at Ru active sites. This electronic modulation effectively weakens the adsorption of the OH group while substantially boosting catalytic activity and stability. The synthesized RuO2–x/MoO3–Ni(OH)2 achieves low overpotentials of 64, 150, and 83 mV at 100 mA cm–2 in 1.0 M KOH, 1.0 M phosphate-buffered saline (PBS), and 0.5 M H2SO4, respectively. Furthermore, it exhibits robust stability for 150 h at 100 mA cm–2 in an alkaline solution. In an anion exchange membrane water electrolyzer, the catalyst requires only 1.76 V to attain 0.5 A cm–2. This work establishes a pioneering pathway for designing efficient electrocatalysts toward the production of clean energy carriers.
研究领域:
电化学
·
纳米材料
·
催化
·
能量转换
·
表面科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Qingyuan Zhang,Dawei Gu,Hui Li,Ze Xu,Hongshun Sun,Jishu Li,Lei Wang,Linjiang Shen
In this study, RuO 2 was deposited on tantalum (Ta) substrates by electrochemical plating and then assembled into supercapacitors RuO 2 //RuO 2 . The output energies of the as-obtained RuO 2 //RuO 2 under dynamic conditions were evaluated through a designed measuring circuit. The specific capacitance of electrodes in RuO 2 //RuO 2 was calculated from the experimental results of the discharge current and the potential of positive/negative electrodes during discharge. Also, the energy of the positive/negative electrodes and RuO 2 //RuO 2 with respect to time were derived. The results showed the positive electrode energy was partly transferred into the load R to generate joule heat and the other was used to elevate the potential of the negative electrode during discharge. The decrease in mass of negative electrode ( m − ) could extend the potential window, resulting in an enhancement of the energy of RuO 2 //RuO 2 . The energy of RuO 2 //RuO 2 with m − = 103 μ g was elevated by 138.7% compared to that with m − = 200 μ g . Further decrease in mass of the negative electrode would deteriorate the energy of RuO 2 //RuO 2 .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ChemElectroChem
·
2020
·Vol. 7
·期 4
·928-936
·
IF 4.154
Yilun Wang,Dawei Gu,Jiaren Guo,Mingyang Xu,Hongshun Sun,Jishu Li,Lei Wang,Linjiang Shen
Graphical One step at a time : A stepwise cyclic voltammetry approach is proposed to construct the potential dependence of specific capacitance. The working voltage window and energy density of RuO 2 //RuO 2 supercapacitors (SCs) are maximized by modulating the mass ratio based on the relationship between specific capacitance and potential. The voltage window and energy density of RuO 2 //RuO 2 with m + /m − =3.03 reach 0.750 V and 4.81 Wh/kg, respectively. These values are 188 % and 304 % higher than those of RuO 2 //RuO 2 with a mass ratio of 0.56. The source of wasted potential window on the electrodes in RuO 2 //RuO 2 is explained in an effort to design and produce better SCs. In this study, a stepwise cyclic voltammetry approach was proposed to clarify the potential dependence of specific capacitance for reduced graphene oxide and ruthenium oxide electrodes. Based on the relationship between specific capacitance and potential, the working voltage window and energy density of RuO 2 //RuO 2 supercapacitors (SCs) were maximized by modulating the mass ratio. The working voltage window of RuO 2 //RuO 2 with a mass ratio of 2.03 (close to optimum mass ratio ) was extended by about 188 % when compared to that calculated at a mass ratio of 0.56. The former was equivalent to a 304 % increase in energy density. In addition, the source of wasted potential window of electrodes on RuO 2 //RuO 2 was investigated in an effort to design and produce better SCs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Energy
·
2023
·
IF 9.3
Shanfu Sun,Guopan Sun,Pengfei Cheng,Ruiqi Liu,Chunfu Zhang
‘Outstanding’ electrocatalysts towards oxygen evolution reaction (OER) are springing up at present, to the extent that one questions if most nanomaterials are inherently highly active electrocatalysts . The answer is negative for certain easy-to-ignore data processing errors could lead to potential misjudgment of electrocatalytic activity. Combing through 100 highly cited papers (ESI 1% in Web of Science) concerning OER published in the last three years, the applications of uncompensated potential ( iR s )-correction rates are severely inconsistent. Herein, taking the benchmarks RuO 2 and IrO 2 as model catalysts, the authors investigated the effects of various iR s -correction rates on OER performance (overpotential, Tafel slope, and turnover frequency). The unanticipated discoveries may provoke a re-examination of those reported as ‘great’ OER electrocatalysts as well as help draw attention to iR s -correction rates in the field of electrocatalysis .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Feng Zhou,Jiadong Chen,Yun Yang,Xiaofeng Ke,Xue Liu,Lijie Zhang,Jun Li,Huile Jin,Shun Wang,Ying Li,Chenliang Su
Development of Ru-based electrocatalysts for acidic oxygen evolution reaction without a trade-off between activity and durability remains challenging. Herein, we constructed Co 3 O 4 /RuO 2 heterojunctions anchored on carbon (Co 3 O 4 /RuO 2 -C) with a low Ru loading (2.74 wt%), in which strong coupled p-n junctions facilitated electron transfer from RuO 2 to Co 3 O 4 . The Co 3 O 4 /RuO 2 -C demonstrated a low overpotential of 170 mV at 10 mA cm −2 and long-term stability in 0.1 M HClO 4 due to its unique structure. The origin of its high performance in acidic OER was revealed by the combination of in-situ attenuated total reflection infrared and Raman tests. Concretely, oxygen generation for Co 3 O 4 /RuO 2 -C was dominated by the adsorbate evolution mechanism, and the introduction of Co 3 O 4 facilitated the redox of RuO 2 , generating active sites for OER. Theoretical calculations further substantiated that the Co 3 O 4 /RuO 2 heterojunctions possessed lower energy barriers for OER. This work provides a compelling synthesis route for effective and stable electrocatalysts for acidic OER.
研究领域:
材料科学
·
电化学
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Shuhe Hu,Yanwei Xiao,Ao Zhang,Zhen Lin,Feng Li,Bingxue Zhang,Guibin Wang,Fengdong Qu,Dong Yao,Hao Zhang
Two-dimensional (2D) BiVO 4 nanosheets (NSs), featuring distinctive chemical properties and dangling-bond-rich surfaces, are promising for developing high-performance gas sensors. However, the previously reported 2D BiVO 4 NSs-based devices suffer from a low responsivity and poor selectivity. In this work, we introduce RuO 2 nanoparticles to boost the gas sensing properties of 2D BiVO 4 NSs-based sensor. Intriguingly, the RuO 2 -decoration changes the selectivity of the corresponding gas sensor from acetone to xylene. Compared to the pristine BiVO 4 sensor, the RuO 2 -BiVO 4 sensor displays a reduced optimal operating temperature of 260℃ and exhibits a response of 19.0–5 ppm xylene, reaching a five-fold enhancement. Simultaneously, the RuO 2 -BiVO 4 sensor also exhibits a rapid response and recovery time of 10 and 25 s respectively, as well as robust long-term stability with less than 5 % variation in response after a storage of 60 days. The improvement in sensing performance can be attributed to the RuO 2 -decoration from three aspects: heterojunction construction, surface state modulation and gas oxidation catalysis on the surface. This work not only provides a high-performance xylene sensing material but also provides insightful comprehension regarding the modification effects of RuO 2 .
研究领域:
材料科学
·
化学工程
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.1
Hexin Wang,Yangjun Mao,Xiaohong Tao,Jiawen Hong,Jiesai Ma,Wenfeng Shen,Lianbang Wang,Junhua Zhao
Ethanol metabolism is a pivotal secondary metabolic process in post-harvest fruit storage, serving as a key indicator of freshness. However, the complex mixture of gases (e.g., CO 2 , aldehydes, esters, and alcohols) released during fruit ripening necessitates sensors with high selectivity and sensitivity specifically toward ethanol. This study presents a high-performance micro-electro-mechanical system (MEMS) ethanol sensor based on WO 3 -RuO 2 nanomaterials synthesized via a simple and low-cost solvothermal method. The optimized sensor with a Ru mass ratio of 1 wt% operates at a low voltage of 1.5 V (200 °C) with a power consumption of only 25 mW. It exhibits a high response of 53.3 toward 100 ppm ethanol, approximately seven times greater than that of a pure WO 3 sensor, along with a low detection limit of 50 ppb. Notably, the sensor demonstrates excellent selectivity against common fruit-emitted interferents (e.g., ethyl acetate and CO 2 ) as well as other alcohols and structurally similar gases. The sensing mechanism was investigated through multiple complementary techniques, including in situ Raman spectroscopy, Mott-Schottky measurements, UV–Vis DRS, and UPS. Furthermore, an artificial neural network (ANN) model, validated by confusion matrices, successfully classified the freshness of mango and peach, confirming the sensor's practical capability for daily spoilage assessment and prediction.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Mengyue Qi,Xinyu Zheng,Huamei Tong,Yu Liu,Di Li,Zaoxue Yan,Deli Jiang
Designing efficient and stable oxygen evolution reaction (OER) catalyst is the basis for the development of sustainable electrolytic water energy techniques. In this work, we presented a heterogeneous-structured electrocatalyst composed of bimetallic oxides-modified RuO 2 nanosheets supported on nikel foam (Co 2 CrO 4 /RuO 2 ) using a hybrid hydrothermal, ion-exchange and calcination method. The unique synergy and interfacial coupling between Co 2 CrO 4 /RuO 2 heterostructures are favorable for optimizing the electronic configuration at this interface and strengthening the charge transport capacity, thus strengthening the catalytic activity of the Co 2 CrO 4 /RuO 2 catalyst. The experimental data demonstrate that Cr leaching facilitates the rapid reconstruction of the catalyst into oxyhydroxides (CoOOH), which are acknowledged to be the real active species of OER. Theoretical calculations show that the Co 2 CrO 4 /RuO 2 heterostructure increases the density state at the Fermi energy level and lowers the d-band center, thereby strengthening the catalytic activity. The synthesized Co 2 CrO 4 /RuO 2 catalyst exhibited OER performance with an overpotential of 209 mV at 10 mA cm −2 and displayed a low Tafel slope of 78.2 mV dec -1 , which outperforms most reported advanced alkaline OER catalysts. This work contributes to a new tactic for the design and development of ruthenium oxide/bimetallic oxides electrocatalysts.
研究领域:
材料科学
·
电化学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2022
·Vol. 15
·期 2
·677-686
·
IF 8.307
Lei Fu,Jun Zhou,Qinyuan Deng,Jiaming Yang,Qinghao Li,Zihe Zhu,Kai Wu
Efficient catalysts for the oxygen evolution reaction (OER) are critical to the progress of electrochemical devices for clean energy conversion and storage. Although heterogeneous electrocatalysts have superior activity, it is a great challenge to elucidate electron transfer at surface catalytic sites and intrinsic mechanisms. Herein, we demonstrate a new type of heterostructure electrocatalyst in which Sr0.9Ce0.05Fe0.95Ru0.05O3 fibers are hybridized with in situ grown RuO2 nanoparticles (SCFR–RuO2). We investigate its unique structure, electron transfer mechanisms related to the highly OER activity by combining experimental and theoretical calculations. Remarkably, SCFR–RuO2 shows an optimized OER overpotential of 295 mV at 10 mA cm−2. The promoted electron transfer and OER kinetics are ascribed to the coupling of electronic effects at the SCFR–RuO2 heterostructure. A strong triangular relationship among overpotential–Tafel slope–work function is proposed to be a potential descriptor of OER activity in SCFR–RuO2. These insights provide guidelines for tuning the OER performance via modified work functions in perovskite electrocatalysts.
研究领域:
材料科学
·
电化学
·
理论计算
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Sustainable Systems
·
2024
·
IF 6.5
Qi Ding,Linfeng Xie,Zijie Lin,Zhuhuang Qin,Yunan Li,Qing Li
The low activity of ruthenium dioxide (RuO 2 ) and the rapid dissolution of the ruthenium (Ru) site during acid oxygen evolution reaction (OER) at high current density restricts its application in proton exchange membrane (PEM) electrolyzers. In this work, a series of rare-earth (RE) elements doped RuO 2 nanorods is developed as high-performance OER electrocatalysts. X-ray absorption spectroscopy suggests that RE doping regulates the local coordination environment around Ru sites, lowers the valance of Ru, and shortens the Ru─O─Ru(M) bond length, which enhances structural stability. Among the RE-RuO 2 samples, Sm-RuO 2 exhibits remarkable performance with a low overpotential of 283 mV to reach 100 mA cm −2 and maintained stability for over 140 h at 10 mA cm −2 . Moreover, the PEM electrolyzer using Sm-RuO 2 as the anode can be stably operated at 500 mA cm −2 for 15 h. Electrochemical analysis, X-ray photoelectron spectroscopy, and in situ Raman spectroscopy show that Sm doping lowers the d -band center, reduces the adsorption energy of O intermediates to enhance the OER activity, and restrains excessive oxidation of Ru sites while stabilizing lattice oxygen during the OER process, thereby enhancing OER stability. This work offers valuable insights into improving the stability of metal oxide catalysts in acidic electrolytes.
研究领域:
材料科学
·
电化学
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Catalysis
·
2026
·
IF 13.6
Zhongxian Wang,Fulin Yang,Fei Wang,Xin Sun,Kai Li,Ligang Feng,Zhangquan Peng,Junyuan Xu
RuO2 is one of the most active electrocatalysts for the acidic oxygen evolution reaction (OER), yet its poor structural stability severely restricts long-term operation in water electrolysis technique. Herein, we report a simple yet highly effective hydroxylation strategy that fundamentally enhances the stability of RuO2 through controlled lattice oxygen hydroxylation. Comprehensive in situ/ex-situ spectroscopic characterizations reveal that lattice oxygen remains largely inert during the OER, while hydroxyl incorporation predominantly regulates the Ru active centers. An optimal hydroxyl concentration yields increase in durability from 21 to 1200 h, forming a volcano-type dependence between hydroxyl content and stability. Theoretical simulations unveil that hydrogen incorporation disrupts the Ru-O octahedral symmetry and broadens the Ru eg orbital, strengthening electron back-donation and mitigating Ru oxidation-state fluctuations during the OER. Excessive hydroxylation, however, destabilizes the lattice by facilitating Ru dissolution. This work establishes hydroxylation as a facile electronic-structure modulation strategy to stabilize Ru-based catalysts, providing mechanistic insights and design principles for durable acidic OER catalysts.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Xian-Jun Niu,Yin-Lei Ma,Jun-Ya Gao,Zhi-Hua Lu,Ji-Sen Li
Rational design and construction of low-cost and efficient catalysts with robust structures are significant toward oxygen evolution reaction (OER), but their scalable synthesis remains a grand challenge. Herein, we report a combustion-assisted strategy for in situ growth of a RuO 2 /CoOOH heterojunction on cobalt foam, which can serve as both metal source and catalyst support. This simple route is favorable to large-scale industrial applications for hydrogen production in the future. Due to the synergistic effect of catalytically active phases, abundant heterointerfaces, and 3D porous structures, the targeted catalyst shows outstanding catalytic OER performance with a lower overpotential of 190 mV to reach a current density of 10 mA cm −2 , smaller Tafel slope of 47.5 mV dec −1 , and long-term durability for 50 h in 1.0 M KOH solution. When assembled as the anode toward full water splitting, the electrolyzer is capable of offering 10 mA cm −2 at a cell voltage of 1.47 V along with remarkable operational stability. Moreover, the device can be powered by a 1.5 V AA battery, wind, and solar energies, respectively. This work offers a feasible, rapid, and scalable approach for fabricating efficient robust catalysts for oxygen electrocatalysis.
研究领域:
材料科学
·
电化学
·
催化科学
✓ 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）