JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 14
·143503
·
IF 3.721
Yijie Liu,Xianzhe Meng,Chao Li,Yifan Gong,Juan Wang,Jiang Bo
Non-biodegradable pharmaceuticals are a group of emerging contaminants that have gained much attention because of their potential risk of inducing adverse ecological and health effects. An efficient Ti/SnO2-Sb2O5-IrO2-RuO2 electrode was prepared by Pechini method and employed as the anode for electrochemical degradation of selected pharmaceuticals (i.e., ibuprofen, atenolol, and carbamazepine). Compared its counterparts, Ti/SnO2-Sb2O5-IrO2-RuO2 exhibited higher oxygen evolution potential, lower chlorine evolution potential, larger active area, and higher stability. Unlike the negligible effect of solution pH from 4.0 to 10.0, increasing current density favored the target pollutants and COD removal. The removal of IBU was mainly attributed to the reaction with •OH, the contribution of which to IBU removal was enhanced with increasing current density. In contrast to IBU, the removal of ATEN and CBZ was mainly ascribed to the reaction with selective radical chlorine species (RCS) mainly in the form of Cl•, which was produced from direct oxidation of Cl− or indirect oxidation by •OH. It was found that the removal of ATEN and CBZ was less affected by dissolved organic matter (DOM) than that of IBU in municipal effluent. This study demonstrates that Ti/SnO2-Sb-RuO2-IrO2 is an attractive electrode for the destruction of pharmaceutical contaminants.
研究领域:
环境科学
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电化学工程
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污染控制
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 16
·160536
·
IF 3.721
Yizhao Tang,Hao Cheng,Qinggang He,Hanyu Li,Yue An,Jian Xie,Ronghai Liu
Through a facile, stepwise approach that includes electropolymerization, calcination, a hydrothermal method and low-temperature adsorption, a carbon array was coated with RuO2/MnO2 to form a highly efficient composite catalyst (RuO2/MnO2@carbon array) for Li–O2 batteries. The unique, hierarchical, three-dimensional array-type structure facilitates electrode wetting and oxygen transport as well as providing a large volume for Li2O2 loading. The growth of MnO2 nanosheets on the carbon array surface alters the surface roughness and provides attachment sites for the subsequent loading of catalyst nanoparticles. In addition, the introduction of RuO2 induces the formation of Mn3+ on the surface of MnO2, which not only improves the electrode conductivity but also the catalytic activity for ORR/OER. As a result, conformal growth of thin layers of Li2O2 on the surface of the RuO2/MnO2@carbon array and reversible decomposition of Li2O2 during cycling were achieved. In comparison with cathodes without a carbon array or catalyst, the Li–O2 cell with a RuO2/MnO2@carbon array cathode exhibits an markedly improved performance with high discharge capacity (10 000 mAh g−1 at 100 mA g−1) and long cycling life (252 cycles at 200 mA g−1 with a limited capacity of 500 mAh g−1).
研究领域:
材料科学
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电化学
·
能源存储
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Zhixiang Ren,Ao Li,Xinyu Lei,Zhengwei Yu,Guangying Wang,Hongliang Zhang,Huan Chen,Yin Wang,Hongming Long
As a mainstream moderate-high temperature (250–420 °C) particulate denitrification catalyst, V 2 O 5 -WO 3 /TiO 2 (VWT) is not applicable to low-temperature (60–150 °C) iron ore sintering flue gas after semi dry/wet desulfurization. In order to improve the NH 3 -deNO x performance of the VWT particle catalyst at low temperatures, a series of powder VWT denitrification catalysts doped with different content of RuO 2 (R-VWT) prepared by the wet co-impregnation method were researched, and found that the particulate catalyst service temperature (about 100 % NO conversion) is lowered from 225 °C (VWT) to below 175 °C by doping 0.5 % RuO 2 . In addition, a series of characterizations indicate that the doped RuO 2 enhances the redox performance of R-VWT and promotes the generation of more surface active intermediate monodentate nitrate, and accelerates the low-temperature surface SCR transient reaction rate.
研究领域:
环境科学
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催化化学
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产品关联
DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-10
·
IF 16.6
Wang Yi,Yang Rong,Ding Yajun,Zhang Bo,Li Hao,Bai Bing,Li Mingrun,Cui Yi,Xiao Jianping,Wu Zhong-Shuai
Exploring durable electrocatalysts with high activity for oxygen evolution reaction (OER) in acidic media is of paramount importance for H 2 production via polymer electrolyte membrane electrolyzers, yet it remains urgently challenging. Herein, we report a synergistic strategy of Rh doping and surface oxygen vacancies to precisely regulate unconventional OER reaction path via the Ru–O–Rh active sites of Rh-RuO 2 , simultaneously boosting intrinsic activity and stability. The stabilized low-valent catalyst exhibits a remarkable performance, with an overpotential of 161 mV at 10 mA cm −2 and activity retention of 99.2% exceeding 700 h at 50 mA cm −2 . Quasi in situ/operando characterizations demonstrate the recurrence of reversible oxygen species under working potentials for enhanced activity and durability. It is theoretically revealed that Rh-RuO 2 passes through a more optimal reaction path of lattice oxygen mediated mechanism-oxygen vacancy site mechanism induced by the synergistic interaction of defects and Ru–O–Rh active sites with the rate-determining step of *O formation, breaking the barrier limitation (*OOH) of the traditional adsorption evolution mechanism.
研究领域:
材料科学
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电化学
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催化
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能源材料
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产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Nan Wang,Jialin Fu,Xuecheng Cao,Lingling Tang,Xiankai Meng,Zhenyi Han,Linhao Sun,Shuo Qi,Dangsheng Xiong
Li–air batteries have received significant attention for their ultrahigh theoretical energy density. However, the byproducts induced by attacking air hinder the conversion of Li–O 2 batteries to Li–air batteries. Humidity is one of the main obstacles, not only causing side reactions with the discharge products but also leading to rapid corrosion of the lithium anode. Here, we fabricated a novel composite hydrophobic catalyst by loading RuO 2 and graphene on N-doped porous carbon. The catalyst was endowed with hydrophobicity and showed superior catalytic performance and low affinity to water in the air. A Li–air battery equipped with this novel composite catalyst exhibited eminent cycling performance in pure oxygen (over 470 h), humid oxygen [∼40% relative humidity (RH), over 310 h], and ambient air (∼42% RH, over 330 h) at a current density of 500 mA g −1 , and the discharge specific capacity increased from 13122.1 to 19358.6 mAh g −1 .
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Moxing Cheng,Haoyun Sheng,Yin’an Zhu,Ziqi Tian,Yichao Lin
The development of highly active and durable catalysts for the acidic oxygen evolution reaction (OER) is urgently needed to accelerate reaction kinetics and reduce energy barriers. Herein, we propose to tune the local electronic structure in RuO 2 via yttrium ion (Y 3+ ) doping to facilitate the OER process following oxide path mechanism (OPM). The electron-deficient of Y 3+ redistributes local charge density, strengthens metal–oxygen bonds to suppress lattice degradation. Moreover, the incorporation of larger Y 3+ radius reduce the Ru–Ru distance, and thereby benefits O–O coupling. The optimized Y 0.11 Ru 0.89 O 2−δ catalyst exhibits an exceptionally low overpotential of 195 mV at 10 mA cm −2 for acidic OER and operates stably for 250 h at 100 mA cm −2 in a PEM electrolyzer. Theoretical investigations reveal that Y–O–Ru structure effectively modifies the chemical environment and optimizes the atomic configuration of active sites. This study establishes electron-deficient, large-radius dopants as an effective strategy for designing efficient and durable acidic OER catalysts, enhancing RuO 2 performance.
研究领域:
电催化
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材料化学
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能源科学
·
表面科学
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无机化学
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电化学工程
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 33
·期 8
·2211102
·
IF 19.924
Kai Huang,Chaoliang Lin,Guangqiang Yu,Peng Du,Xinyu Xie,Xian He,Zhichuan Zheng,Ning Sun,Haolin Tang,Xibo Li,Ming Lei,Hui Wu
The introduction of electronegative non-metallic heterostructures is promisingly desired to develop Ru-based oxide catalysts, which have higher activity and robust stability for acidic oxygen evolution reaction (OER). Developing scalable synthetic strategies and enlightening the mechanism understanding of the enhancement is imperative but still challenging. Herein, a facile selenium-assisted reduction approach is reported to fabricate the partially reduced nano-sized Ru with mixed-valence Se species immobilization, directly from commercial RuO 2 through ball milling and annealing procedures. The obtained Ru/Se-RuO 2 composites demonstrate superior electrocatalytic performance toward acidic OER with small overpotentials of 190 and 240 mV at 10 and 100 mA cm −2 , a Tafel slope of only 43.7 mV dec −1 , and no detectable activity decay under operation for 24 h. Experimental results further demonstrate a synergistic effect including enhanced electron transfer interaction by the formation of Ru/RuO 2 heterostructures and more available active sites due to Se doping. Theoretical calculations indicate that slight Se doping and metallic Ru loading can significantly decrease the free energy change for the formation of *OOH intermediate, and thus dramatically promotes the OER performance. This strategy offers a promising strategy for the development of non-metallic elements incorporated high-performance catalysts and related water electrocatalytic devices for sustainable energy applications.
研究领域:
电催化
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材料科学
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能量转换
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纳米材料
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可持续能源
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yingchen Xu,Chenghan Yang,Qinghua Deng,Yuming Zhou,Chunfeng Mao,Youchao Song,Min Zhu,Yiwei Zhang
It is highly desirable and challenging to design efficient and stable hydrogen evolution reaction (HER) electrocatalysts in a variety of acidic and alkaline media. Here, a novel ternary catalyst has been proposed consisting of ruthenium dioxide doped carbon nanotubes (denoted as RuO 2 @CNT) wrapped in a multi-step strategy with a first synthesis of a bismuth metal porphyrin-based organic framework as co-catalyst (denoted as RuO 2 @CNT@MOF). The addition of CNT improves not only the conductivity of the electrocatalyst but also the distribution of the active RuO 2 particles. Furthermore, the highly symmetrical conjugated structure of Bi-TCPP MOF facilitates both the adsorption of hydrogen ions and the generation of hydroxyl radicals (•OH). The Bi-TCPP MOF encapsulated in the outer layer of RuO 2 @CNT enhances the mechanical strength and creates the confinement effect, leading to the synthesis of RuO 2 @CNT@MOF as a HER electrocatalyst that exhibits excellent catalytic performance and acid and base resistance. In particular, low overpotentials of 13 mV and 50 mV can be achieved to provide current densities of 10 mA cm −2 in alkaline and acidic media, respectively. Significantly, this work provides new ideas for the careful design and development of MOFs as co-catalysts to improve the overall performance of materials in energy-related fields.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
·
IF 14.7
Zhou Chenhui,Li Lu,Dong Zhaoqi,Lv Fan,Guo Hongyu,Wang Kai,Li Menggang,Qian Zhengyi,Ye Na,Lin Zheng,Luo Mingchuan,Guo Shaojun
Ruthenium (Ru) is widely recognized as a low-cost alternative to iridium as anode electrocatalyst in proton-exchange membrane water electrolyzers (PEMWE). However, the reported Ru-based catalysts usually only operate within tens of hours in PEMWE because of their intrinsically high reactivity of lattice oxygen that leads to irrepressible Ru leaching and structural collapse. Herein, we report a design concept by employing large-sized and acid-resistant lattice lead (Pb) as a second element to induce a pinning effect for effectively narrowing the moving channels of oxygen atoms, thereby lowering the reactivity of lattice oxygen in Ru oxides. The Pb-RuO 2 catalyst presents a low overpotential of 188 ± 2 mV at 10 mA cm −2 and can sustain for over 1100 h in an acid medium with a negligible degradation rate of 19 μV h −1 . Particularly, the Pb-RuO 2 -based PEMWE can operate for more than 250 h at 500 mA cm −2 with a low degradation rate of only 17 μV h −1 . Experimental and theoretical calculation results reveal that Ru-O covalency is reduced due to the unique 6 s −2 p −4 d orbital hybridization, which increases the loss energy of lattice oxygen and suppresses the over-oxidation of Ru for improved long-term stability in PEMWE.
研究领域:
电化学
·
材料科学
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催化
·
能源存储与转换
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产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2023
·Vol. 42
·期 2
·119-128
·
IF 5.4
Qiong Zhang,Ruixue Zhang,Yingxiu Zhao,Tiantian Sun,Jianyang Gao,Guang-Rui Xu,Zexing Wu,Yu Yang,Lei Wang
Comprehensive Summary Realizing the hydrogen economy by water electrolysis is an attractive approach for hydrogen production, while the efficient and stable bifunctional catalysts under high current densities are the bottleneck that limits the half-cell reactions of water splitting. Here, we propose an approach of hydrothermal and thermal annealing methods for robust MoO 2 /MoNi 4 @Ru/RuO 2 heterogeneous cuboid array electrocatalyst with multiplying surface-active sites by depositing a monolayer amount of Ru. Benefiting from abundant MoO 2 /MoNi 4 @Ru/RuO 2 heterointerfaces, MoO 2 /MoNi 4 @Ru/RuO 2 heterogeneous cuboid array electrocatalysts effectively drive the alkaline water splitting with superior hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) performances. The synthesized MoO 2 /MoNi 4 @Ru/RuO 2 has high HER activity, which realizes the working overpotentials of 48 mV at 50 mA·cm –2 , further achieving overpotentials of 230 mV for industry-level 1000 mA·cm –2 in alkaline water electrolysis. Moreover, it also showed an enhanced OER activity than commercial RuO 2 with a small overpotential of 280 mV at 200 mA·cm –2 in alkaline media. When building an electrolyzer with electrodes of (–)MoO 2 /MoNi 4 @Ru/RuO 2 IIMoO 2 / MoNi 4 @Ru/RuO 2 (+), a cell voltage of 1.63 V and 1.75 V is just required to support the current density of 200 mA·cm –2 and 500 mA·cm –2 in alkaline water electrolysis, much lower than that of the electrolyzer of (–)Pt/CIIRuO 2 (+). This work demonstrates that MoO 2 /MoNi 4 @Ru/RuO 2 heterogeneous nanosheet arrays are promising candidates for industrial water electrolysis applications, providing a possibility for the exploration of water electrolysis with a large current density.
研究领域:
材料科学
·
电化学
·
能源材料
·
催化
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
·
IF 13
Ziying Sun,Faheem Muhammad,Chenfeng Qiao,Wenli Gong,Zheng Wang,Yuan Liu,Xin Yu,Jian Dong,Jie Lv,Xi Cheng,Zhihao Lu,Chenguang Lin,Zhongyang Lv,Wenshuang Sun,Tao Yuan,Jia Meng,Rui Wu,Dongquan Shi,Hui Wei,Nirong Bao
Wear particulate debris-induced osteoclast over-activation is a major causative factor in periprosthetic osteolysis and aseptic loosening, resulting in the non-infectious failure of total joint arthroplasty. To mitigate such pathological bone loss, various therapeutic targets have been identified. Oxidative stress is one of the main contributing factors in the promotion of osteoclastogenesis. Herein, using a template-assisted approach, hollow ruthenium oxide (RuO 2 ) nanospheres are synthesized as an effective antioxidant for the treatment of CoCrMo alloy particles-induced osteolysis. Hollow RuO 2 significantly suppressed receptor activator of nuclear factor kappa-B ligand (RANKL)-induced osteoclastogenesis, bone resorption, and the expression of specific markers (including NFATc1, c-Fos, MMP9, CTSK, and DC-STAMP) of bone marrow-derived macrophages via inhibition of the nuclear factor kappa-B (NF-κB) and tumor necrosis factor (TNF)-α pathways. In mouse calvaria, hollow RuO 2 nanozymes demonstrate an appreciable attenuation in osteoclast differentiation, bone loss, and soft tissue malformations induced by CoCrMo alloy particles. This study envisions that the antioxidant nanozymes may be further applied as a therapeutic entity in the prevention and treatment of other inflammatory and oxidative stress-related ailments.
研究领域:
材料科学
·
纳米技术
·
骨科
·
生物化学
·
药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Zhou Liu,Lina Xie,Kangqiang Qiu,Xinxing Liao,Thomas W. Rees,Zizhuo Zhao,Liangnian Ji,Hui Chao
Oxidative stress induced by reactive oxygen species (ROS) is one of the major pathological mechanisms of acute kidney injury (AKI). Inorganic nanomaterial-mediated antioxidant therapy is considered a promising method for the prevention of AKI; however, currently available antioxidants for AKI exhibit limited clinical efficacy due to the glomerular filtration threshold (∼6 nm). To address this issue, we developed ultrasmall RuO2 nanoparticles (RuO2NPs) (average size ≈ 2 nm). The NPs show excellent antioxidant activity and low biological toxicity. In addition, they can pass through the glomerulus to be excreted. These properties in combination make the ultrasmall RuO2NPs promising as a nanozyme for the prevention of AKI. The NP catalytic properties mimic the activity of catalase, peroxidase, superoxide dismutase, and glutathione peroxidase. The nanozyme can be efficiently and rapidly absorbed by human embryonic kidney cells while significantly reducing ROS-induced apoptosis by eliminating excess ROS. After intravenous injection, the ultrasmall RuO2NPs significantly inhibit the development of AKI in mice. In vivo toxicity experiments demonstrate the biosafety of the NPs after long-term preventing. The multienzyme-like activity and biocompatibility of the ultrasmall RuO2NPs makes them of great interest for applications in the fields of biomedicine and biocatalysis.
研究领域:
纳米技术
·
生物医学工程
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药理学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）