FUEL
·
2025
·
IF 7.5
Yingxue Du,Qihao Wang,Xingchao Zang,Weiping Xiao,Yingxia Zong,Xuyun Guo,Zexing Wu,Lei Wang
The development of efficient and durable bifunctional electrocatalysts for overall water splitting remains a key challenge for sustainable hydrogen production. In this study, a novel strategy is proposed to synergistically design boron vacancies and integrate Ru species into NbB 2 (Ru/RuO 2 -NbB 2 -v) by calcination and immersion methods. NbB 2 with its intrinsic high conductivity facilitates to electron transport and improves the reaction kinetics of the catalyst. The strategic introduction of abundant B vacancy and Ru species can expose numerous active sites and lower the reaction energy barriers in the materials, thereby enhancing the reactivity of the catalysts. Impressively, Ru/RuO 2 -NbB 2 -v exhibited superior hydrogen evolution reaction (HER) activity in wide pH range. In addition, Ru/RuO 2 -NbB 2 -v also exhibits good oxygen evolution reaction (OER) performance in acidic and alkaline. A self-assembled electrolyzer driven by simulated solar energy enables the conversion of solar energy into hydrogen energy. The work pioneers a defect-engineering and noble-metal-decoration strategy to transform metal borides into versatile electrocatalysts, offering a scalable pathway for clean energy technologies.
研究领域:
材料科学
·
能源技术
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Suci Meng,Pengfei An,Lijie Chen,Shichao Sun,Zhongkai Xie,Min Chen,Deli Jiang
Developing high-efficient and low-cost photocatalysts is of great significance yet challenging for photocatalytic hydrogen evolution. Herein, we report a 2D/2D Ru-modulated CoP nanosheets (Ru-CoP -x , where x refers the Ru-to-Co molar ratio)/g-C 3 N 4 nanosheets (GCN NSs) ternary hybrid as a photocatalyst for hydrogen evolution under visible light. The optimal photocatalyst 25% Ru-CoP-1:8/GCN NSs exhibits an excellent hydrogen evolution rate of 1172.5 µmol g −1 h −1 under visible light with a high apparent quantum efficiency (AQE) of 3.49% at 420 nm, which is close to Pt/g-C 3 N 4 photocatalytic system and higher than most reported transition metal phosphides (TMP)/g-C 3 N 4 photocatalytic system. Experimental results indicate that the higher photocatalytic hydrogen evolution performance can be mainly attributed to the binary Ru-CoP -x co-catalyst with efficient charge separation and promoted surface water reduction kinetics, and the 2D/2D self-assembly structure with strong interface Schottky effect and short charge transport distance. This study provides a new approach to develop cost-effective Pt-alternative co-catalysts for photocatalytic hydrogen evolution by incorporating a small amount of ruthenium into the transition metal phosphides.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Siqi Zhang,Ying Wang,Dan Li,Ziye Kang,Feilong Dong,Haiming Xie,Jia Liu
The synergistic effect between noble metal and spinel-type compounds is beneficial for enhancing the electrochemical performance in a Li–O 2 battery. Herein, Ru-impregnated needle-like NCO embedded in porous carbon textiles (CTs) (x wt% Ru@NCO/CTs (x = 0, 0.5, 1, 2, and 5)) is applied as a flexible and binder-free O 2 electrode for Li–O 2 batteries. The NCO structure can benefit to the Li + migration, O 2 diffusion, and Li 2 O 2 accommodation. The Ru nanoparticles can promote OER and ORR reaction kinetics and lower the overpotential. A flexible Li–O 2 cell with 1 wt% Ru@NCO/CTs exhibits a good cyclic stability of 360 cycles with an overpotential of 0.78 V at a constant current density of 200 mA/g, a considerable rate performance, a high reversibility with the Li 2 O 2 formation and its reverse decomposition, and a good flexibility stability under bending and twisting at the different conditions. This work can contribute to the development of electrode material and its architecture design for portable and wearable devices .
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Xupo Liu,Xihui Wang,Mingxing Gong,Ran Wang,Xiaofei Hao,Ye Chen
Developing economical and efficient hydrogen evolution reaction (HER) electrocatalysts is essential for achieving clean hydrogen energy from water electrolysis. Herein, RuFe−based catalysts have been synthesized on the porous iron foam through adopting a facile corrosion strategy. The iron corrosion environment is modulated by introducing the corrosion inhibitors containing amine groups. It is uncovered that urea molecules are beneficial for constructing the moderate corrosion environment to achieve the nanoneedle-like Ru-decorated FeOOH corrosion layers. Because of the synergistic effect between Ru and Fe atoms on hydrogen absorption regulation, the prepared RuFe−U catalyst displays the low overpotential of 113 mV to acquire the current density of 100 mA cm −2 along with prominent durability of continuously operating at 100 mA cm −2 for over 20 h. Moreover, the assembled water splitting electrolyzer affords the voltage of 1.533 V to achieve the current density of 100 mA cm −2 . This work confirms that the corrosion strategy is a promising approach for synthesizing high-performance electrocatalysts for energy conversion application.
研究领域:
材料科学
·
能源转换
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2024
·Vol. 16
·期 23
·11250-11261
·
IF 5.8
Tingxia Wang,Xu Zhang,Xiaojiao Yu,Yun Liu,Junpeng Li,Zongbin Liu,Ningning Zhao,Jian Zhang,Jinfen Niu,Qingliang Feng
High-efficiency water electrolysis over a broad pH range is desirable but challenging. Herein, Ru-decorated VS2 on carbon cloth (Ru–VS2/CC) has been in situ synthesized, which features the regulated electronic structure of VS2 by introducing Ru. It is remarkable that the optimal Ru–VS2/CC displays excellent electrocatalytic hydrogen evolution activity with overpotentials of 89 and 87 mV at −10 mA cm−2 in 0.5 M H2SO4 and 1.0 M KOH, respectively. Theoretical calculations and electrocatalytic measurements have demonstrated that introducing Ru induces an enhanced charge density around the Fermi level, facilitating charge transfer and speeding up the electrocatalytic HER kinetics. The Gibbs free energy of the hydrogen intermediate (ΔGH*) of Ru–VS2/CC (0.23 eV) is much closer to zero than that of pure VS2 (0.51 eV) and Ru (−0.37 eV), demonstrating an easier hydrogen adsorption and desorption process for Ru–VS2/CC. The more favorable ΔGH*, differential charge density and the d-band center endow Ru–VS2 with enhanced intrinsic electrocatalytic activity. This study presents a feasible strategy for enhancing electrocatalytic HER activity by the regulation of the electronic structure and the rational integration of dual active components.
研究领域:
材料科学
·
电催化
·
理论计算
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2023
·Vol. 11
·期 4
·1153-1166
·
IF 7
Jiajing Xia,Lujia Zhang,Yizhou Wang,Weiju Hao
Constructing economical and corrosion-resistant catalytic electrodes for efficient and high-current seawater splitting is a significant challenge. Herein, we employed a gentle, one-step immersion method to obtain an efficient and stable self-supporting integrated catalytic electrode via nickel foam (NF) etched in situ by sodium hypophosphite and trace ruthenium (Ru@P–NF). The successful growth of spherical Ru on the P–NF resulted in high intrinsic activity and rapid electron transfer capabilities. The Ru@P–NF electrode achieved a current density of 100 mA cm−2 in the hydrogen evolution reaction (HER) with an overpotential of only 32 mV in an alkaline simulated seawater system (1 M KOH + 0.5 M NaCl). An overpotential of only 153 mV resulted in a current density of 10 mA cm−2 in the oxygen evolution reaction (OER). Moreover, this electrode necessitated a mere 1.42 V at 20 mA cm−2 to facilitate overall water splitting. Impressively, the operation of Ru@P–NF was stable at 100 mA cm−2 for over 1500 hours without significant degradation, and thus demonstrated stable catalysis for an impressive 300 h at an industrial-level high current density in a weakly alkaline seawater and urine system. This work provides robust theoretical support for the construction of efficient industrial-scale catalytic electrodes for water electrolysis.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
·Vol. 20
·期 47
·2404830
·
IF 13
Xueying Luan,Lingfei Guo,Hongdong Li,Weiping Xiao,Guangrui Xu,Dehong Chen,Caixia Li,Yunmei Du,Zexing Wu,Lei Wang
The developed strategies for synthesizing metal phosphides are usually cumbersome and pollute the environment. In this work, an ultrafast (30 s) quasi-solid-state microwave approach is developed to construct cobalt–molybdenum phosphide decorated with Ru (Ru/Co x P-MoP) featured porous morphology with interconnected channels. The specific nanostructure favors mass transport, such as electrolyte bubbles transfer and exposing rich active sites. Moreover, the coupling effects between metallic elements, especially the decorated Ru, also act as a pivotal role on enhancing the electrocatalytic performance. Benefiting from the effects of composition and specific nanostructure, the prepared Ru/Co x P-MoP exhibits efficient HER performance with a current density of 10 mA cm −2 achieved in 1 m KOH, 0.5 m H 2 SO 4 , seawater containing 1 m KOH and 1 m PBS, with overpotentials of 52, 59, 55, 90 mV, and coupling with good stability. This work opens a novel and fast avenue to design metal-phosphide-based nanomaterials in energy-conversion and storage fields.
研究领域:
材料科学
·
电催化
·
能源转换与存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2024
·
IF 10.7
Xu Yu,Han Tian,Ziyi Yu,Fantao Kong,Chang Chen,Ziwei Chang,Jian Huang,Xiangzhi Cui,Jianlin Shi
Hydrogen spillover effect-based active catalyst design is an effective strategy to enhance the hydrogen oxidation reaction (HOR) performance, which, unfortunately, still suffers from the high hydrogen spillover energy barrier. Here, a strategy alloying Ir with Ru is proposed to modulate the electronic structure of Ir to accelerate the H* transfer by a novel Ir–Ru–WO2.72 bridge, thus significantly reducing the hydrogen spillover energy barrier from Ir to WO2.72. The IrRu nanoclusters were deposited on a three-dimensional ordered macroporous WO2.72–C framework, and thus the constructed IrRu–WO2.72–C (1.16 wt% Ir and 1.09 wt% Ru) catalyst exhibits excellent HOR and CO-tolerance performance, rather high cell power density, and especially, 4 times higher mass activity than that of Pt/C. The modulation of Ru largely decreases the work function difference between the IrRu clusters and substrate, resulting in a reduced hydrogen spillover barrier via the Ir–Ru–WO2.72 bridge, weakened CO adsorption and fast removal of the adsorbed CO.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Xiaowei Fu,Qichang Li,Hongdong Li,Weiping Xiao,Zhenyu Xiao,Guangrui Xu,Dehong Chen,Zexing Wu,Lei Wang
Transition-metal phosphides (TMPs) have attracted extensive attention in energy-related fields, especially for electrocatalytic hydrogen evolution reaction (HER). However, it is imperative to develop a facile and time-consuming approach to prepare metal phosphides with satisfactory catalytic performance. Herein, nitrogen-doped CoP-Co2P decorated with Ru (Ru/N-CoP-Co2P) is synthesized (Ru/N-CoP-Co2P) through a hydrothermal route and following an ultrafast and simple microwave avenue within 20 s. The achieved Ru/N-CoP-Co2P possesses an interconnected porous morphology to expose abundant active sites and accelerate the mass transport. Moreover, N doping and Ru-supported decorated Ru/N-CoP-Co2P also play a key role in promoting the electrocatalytic activity. Therefore, the as-designed Ru/N-CoP-Co2P presents good catalytic performance for the HER in a wide pH range. Ru/N-CoP-Co2P merely needs overpotentials of 63, 100, and 65 mV to obtain 10 mA cm–2 in acidic, alkaline, and seawater electrolytes. This research provides a novel and efficient strategy for the synthesis of TMPs with highly efficient catalytic activity.
研究领域:
材料科学
·
电催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Meijiao Qu,Yimin Jiang,Miao Yang,Shu Liu,Qifei Guo,Wei Shen,Ming Li,Rongxing He
Highly active and stable catalysts toward hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is extremely important but challenging for overall water splitting. Herein, a strategy by modulating surface electron densities is adopted to design new catalyst: the Ru-NiFe-P nanosheets on 3D self-supported nickel foam was developed by doping a small quantity of Ru into transition metals phosphates. The designed catalyst displays excellent electrocatalytic performance in 1.0 M KOH, with low overpotentials of 44 mV at 10 mA cm −2 for HER and 242 mV at 100 mA cm −2 for OER. Particularly, it only needs 1.47 V to yield 10 mA cm −2 for overall water splitting. Density functional theory calculations reveal that Ru-incorporated NiFe-P can generate new active sites on Ru atoms and increase the catalytic activity of original P sites leading to an optimal Gibbs free-energy on catalysts surface. This work offers a new perspective for designing admirable electrocatalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2023
·
IF 4.6
Xu Wu,Heqin Guo,Litao Jia,Yong Xiao,Bo Hou,Yongxiang Gao,Debao Li
δ-MnO 2 exhibits excellent activity for furfural oxidation to furoic acid under base-free conditions. However, its poor C H bond breaking capacity leads to lower conversion efficiency per unit mass catalyst than noble metal. Thus, a series of Ru-modified δ-MnO 2 (Ru x /δ-MnO 2 ) have been made to enhance its C H bond breaking ability. The result showed that the furfural conversion was greatly enhanced on Ru x /δ-MnO 2 due to the enhanced capability for breaking the C H bond. Especially for Ru0.25/δ-MnO 2 , whose conversion rate per unit mass was 18 times higher than δ-MnO 2 . The characterization results showed that the Ru species mainly existed as single atoms or clusters on Ru0.25/δ-MnO 2 and Ru0.5/δ-MnO 2 , while started to aggregate to RuO 2 nanoparticles on Ru1/δ-MnO 2 and Ru2/δ-MnO 2 . With the increase of Ru particles, the Ru's average oxidation state (AOS) decreased from +6 on Ru0.25/δ-MnO 2 to +4.74 on Ru2/δ-MnO 2. The Ru's TOF (intrinsic activity per Ru) was positively linearly related to the Ru's AOS. The electron-deficient Ru in Ru0.25/δ-MnO 2 can strongly adsorb the H atom of the C H of geminal diol intermediate and accelerate the breakage of its C H bond. As a result, Ru in the Ru0.25/δ-MnO 2 exhibited the highest TOF, which can even reach 29.85 mmol FF /mmol Ru /h.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Hua Jin,Linjian Yu,Kun Xiong,Jia Chen,Haidong Zhang,Min Deng,Xueqing Shi
Efficient hydrogen production by water electrolysis is primarily restrained by imperfect over-potential and poor reaction dynamics on oxygen evolution reaction (OER). Thermodynamically favourable urea oxidation reaction (UOR) is a class of promising routes for substituting sluggish OER and for coupling with cathodic hydrogen production because of smaller equilibrium potential (0.37 V) than that of OER (1.23 V). Herein, a versatile Ru-NiO/p-Ni catalyst was prepared through in-situ generating nickel hydroxide nanosheets on the surface of ordered porous Ni, then doping low Ru and annealing treatment. The optimized Ru-NiO/p-Ni displayed outstanding activity and stability towards hydrogen evolution reaction (HER), OER and UOR with potentials of −0.13 V, 1.57 V, and 1.39 V at 100 mA cm −2 , respectively. Ru-NiO/p-Ni‖Ru-NiO/p-Ni can achieve 100 mA cm −2 in urea-aided water splitting at a voltage of only 1.58 V, which is prominently 170 mV smaller than the voltage of water electrolysis (1.75 V). The excellent electrocatalytic performance is owing to the outstanding inherent activity generated by cooperative effect of Ru and NiO, along with rich defect and active centre of Ru-NiO/p-Ni supplied by the large surface area of 3D porous structure. The formation of more rich Ni active species with a high valence through transport of electrons between Ru and Ni is favourable to promoting the dissociation of urea molecules, eventually improving UOR. Therefore, it can facilitate urea-aided water splitting, which provides a valuable strategy for constructing versatile catalysts for a cathodic energy-efficient hydrogen production coupled with other anodic oxidation reactions.
研究领域:
能源材料科学
·
电催化
✓ 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）