INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Aoqi Tang,Pei Zhu,Wen Zhang,Zhongbin Zhuang,Shuang Yao,Changhua An
Developing efficient nickel–iron-based electrocatalysts for the oxygen evolution reaction (OER) still remains a challenge for long-term application in water electrolysis. Herein, amorphous Ni2Fe hydroxide nanosheets with self-healing active centers supported on stainless steel mesh (a-Ni2Fe(OH)x/SSM) are fabricated using a simple electrochemical deposition strategy. In situ Raman evidence shows that the amorphous structure of a-Ni2Fe(OH)x/SSM exhibits strong self-healing ability, efficiently promoting the rapid interconversion between the γ-NiOOH intermediate and Ni-based hydroxides during electrocatalysis. As a result, the as-obtained a-Ni2Fe(OH)x/SSM exhibits a low overpotential of 247 mV at 100 mA cm–2 and robust electrochemical stability for 200 h. Moreover, an anion-exchange membrane electrolyzer for water splitting is assembled utilizing a-Ni2Fe(OH)x/SSM as the anode, and current densities of 500 and 1000 mA cm–2 are achieved at 1.62 and 1.72 V, respectively, with stable performance at 500 mA cm–2 over 30 h. This work provides a facile approach for designing amorphous catalysts for various useful reactions.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2017
·
IF 2.986
Jindou Hu,Yali Cao,Jing Xie,Dianzeng Jia
To reduce the cost of the traditional noble metal-loaded photocatalysts for H 2 production, low-cost Ni(OH) 2 -TiO 2 nanocomposites were designed and synthesized by a simple room-temperature solid-state chemical method (RSCM), which is a facile, low-cost and eco-friendly manipulation. Various testing methods and tools were used to characterize the crystal structure, elemental composition, morphology, light absorption ability, fluorescent performance, photocurrent density, and photocatalytic activity of the obtained nanocomposites. The results indicated that RSCM can be used to synthesize Ni(OH) 2 -TiO 2 nanocomposites with a small size (50 nm) and good dispersity. Compared to pure TiO 2 , the obtained nanocomposites displayed excellent photocatalytic performance for H 2 production by photocatalytic water-splitting. The amount of hydrogen needed for the optional nanocomposite NOT-1 was 9180 μmol/g, which is 29 times that of the commercial P25. The reason for the improved performance for photocatalytic hydrogen production is that the existing Ni(OH) 2 in nanocomposites promoted the separation between the photogenerated electron and holes.
✓ 已验证
产品关联
DOI
高影响因子
ChemSusChem
·
2024
·
IF 7.5
Yue Qin,Qingli Xu,Rong Zhao,Qingfa Wang
Graphical Hybrid NiS/Ni(OH) x catalyst containing abundant heterointerfaces and appropriate oxygen vacancies show excellent oxygen evolution reaction (OER) activity and stability. The oxygen vacancies can be easily regenerated to recover the OER performance after the stability test. A mechanism of oxygen vacancies transformation and regeneration based on the Ni-S-5 catalyst is proposed. Developing low-cost and highly efficient electrocatalysts toward oxygen evolution reaction (OER) is of vital significance for electrochemical water splitting. Herein, we fabricate a heterostructure NiS/Ni(OH) x electrocatalyst (Ni-S-n) with regenerative oxygen vacancies via electro-deposition on nickel foam (NF) followed by a facile NaBH 4 reduction. The resulting Ni-S-5 catalyst with appropriate amount of oxygen vacancies (O vs ) exhibits extraordinary activity for alkaline OER with overpotential of 142 mV and 248 mV to reach the current density of 10 mA cm −2 and 100 mA cm −2 , respectively. This catalyst also shows remarkable durability with 40 h. After the stability test, the excellent OER performance is well recovered by regenerating the surface oxygen vacancies (O vs ) significantly with additional NaBH 4 reduction. The Ni-S-5 catalyst still displays good activity even after repeating it three times (180 h). The surface oxygen vacancies act as vital active sites for OER. A mechanism of O vs species transformation and regeneration based on the Ni-S-5 catalyst is proposed, which provides a new direction for exploring ultrastable and efficient OER electrocatalysts with renewable active species.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Zhou Yuan,Le Han,Yuchi Zhang,Lufang He,Peng Liu,Yan Xu
Self-assembled inorganic metal halide perovskite composites with high emitting efficiency, tunable multimode emission and stimuli-responsive luminescence demonstrated great potential in diversified luminescence applications. Here, a novel CsPbBr 3 /EuWO 4 (OH) composite was successfully prepared through the surface adsorption of Pb 2+ ions on hydroxylated EuWO 4 (OH) microsheets and subsequent nucleation of CsPbBr 3 peroviskite quantum dots (PQDs) by the anti-solvent crystallization in CsBr containing N,N-dimethylformamide (DMF) solution. Due to the distinct fluorescent thermochromic switching properties of temperature-insensitive Eu 3+ and sensitive CsPbBr 3 PQDs emitting centers, the resultant CsPbBr 3 /EuWO 4 (OH) composite exhibits excellent ratiometric temperature sensing performance. The CsPbBr 3 /EuWO 4 (OH) thermometer based on the fluorescence intensity ratio (FIR) technique originating from emissions of Eu 3+ to CsPbBr 3 PQDs was then explored with a high temperature sensitivity (S r ) of 5.8 % ℃ −1 at 54 ℃. In addition, a high-security-level information encryption scheme was proposed by utilizing the excitation-wavelength-dependent switchable fluorescence of CsPbBr 3 /EuWO 4 (OH) composite. This study provides a simple and feasible strategy for assembling dual-emission CsPbBr 3 /EuWO 4 (OH) composite, showing potential applications in optical ratiometric thermometry and information encryption fields.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Yaohao Zhang,Kaifen Luo,Lijuan Peng,Jiahuan Zhong,Chengkai Zhang,Dingsheng Yuan
Compared to a single heterostructure , constructing multiple heterojunction interfaces to enhance bifunctional catalytic activity still faces challenges. Herein, a nanoflower-like electrocatalyst with multiple heterojunction interfaces, which consists of MoO 3 , V 2 O 5 , and Ni(OH) 2 in-situ grown on nickel foam, is prepared through a one-step hydrothermal method (MoO 3 /V 2 O 5 /Ni(OH) 2 /NF, named MVN/NF). The MVN/NF exhibits superior catalytic performance, attributable to enhanced electron transfer facilitated by numerous heterojunction interfaces, a substantial active specific surface area , and a self-supported architecture. It requires low potentials for hydrogen evolution reaction , urea oxidation reaction , and overall urea electrolysis of 81 mV, 1.351 V, and 1.450 V (vs. RHE), respectively, to reach a current density of 10 mA cm −2 . By cutting the material into a large-scale electrode for use in an alkaline electrolyzer , its Faraday efficiency was 90.0%, and the urea decomposition rate reached 45.1%. This work offers broad application prospects for the realization of large-scale hydrogen production and the decomposition of urea-containing wastewater.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2024
·
IF 4.1
Ting Yu,Ying Liang,Zejun Zhou,Fengjie Chen,Yingjun Wang,Yunjun Mei,Mengxi Cao,Bolei Chen,Pu Wang,Yawei Wang
The photocatalytic generation of hydrogen peroxide (H 2 O 2 ) using artificial synthetic methods is promising. However, the sluggish hole-induced water oxidation half-reaction that hinders charge separation severely limits H 2 O 2 generation efficiency. This study used the oxidation half-reaction of tetracycline (C 22 H 24 N 2 O 8 , TC) to accelerate charge separation over GaOOH/In(OH) 3 composites with Type II heterojunctions under sunlight irradiation to increase the H 2 O 2 generation efficiency. The results demonstrated that the H 2 O 2 generation efficiency significantly increased from 74.7 to 389.8 µmol L −1 h −1 as the TC degradation efficiency increased from 0.02 to 0.37 mg L −1 h −1 . Radical quenching experiments further indicated that TC degradation consumed holes, increasing the electron formation rate and enhancing H 2 O 2 generation. A comparison with density functional theory calculations revealed that H 2 O 2 generation was a one-step 2-electron route (O 2 + 2e − + 2H + → H 2 O 2 ). These findings are expected to provide new strategies for promoting photocatalytic synthesis of H 2 O 2 .
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-12
·
IF 14.7
Wang Ruilin,Luo Hao,Duan Chengyu,Liu Huimin,Sun Mengdi,Zhou Quan,Ou Zheshun,Lu Yinglong,Luo Guanghui,Yu Jimmy C.,Hu Zhuofeng
Water oxidation presents a promising avenue for hydrogen peroxide (H 2 O 2 ) production. However, the reliance on alkaline bicarbonate electrolytes as an intermediate has limitations, such as H 2 O 2 decomposition and a narrow pH effectiveness range (7–9), restricting its utility across wider pH ranges. This study unveils a crystal OH mediating pathway that stabilizes SO 4 OH* as a crucial intermediate. Basic copper carbonate (Cu 2 (OH) 2 CO 3 ) tablets, commonly found on cultural relics, exhibit the capability to generate H 2 O 2 in neutral or acidic non-bicarbonate electrolytes. By leveraging this crystal OH mediating strategy, considerable H 2 O 2 production in Na 2 SO 4 electrolytes is achievable. Notably, the H 2 O 2 production rate can reach 64.35 μmol h −1 at 3.4 V vs. RHE in a 50 mL 0.5 M Na 2 SO 4 electrolyte. This research underscores the importance of crystal part in catalyst in catalyzing the 2e − water oxidation reaction, offering valuable insights for future investigations.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Shuai Zhang,Zhenqian Li,Meng Wang,Dongyi Jia,Haiyi Jin,Han Zhang,Haipeng Zhang,Yixuan Ma
The development of high-performance and cost-effective battery technologies is crucial for storing and utilizing intermittent renewable energy. Aqueous iron-ion batteries (AIBs) constructed using low-cost iron salts hold promise in energy storage strategies but are constrained by the complex design and construction of cathode materials. Here, we report a one-step synthesis of carbon nanodots as conductive substrates for cathode-free aqueous iron-ion batteries, enabling the efficient deposition of hydroxyl iron oxide and enhanced ion storage. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and Raman analyses confirm the effective deposition of hydroxyl iron oxide, ensuring the achievement of a maximum capacity of 0.43 mAh cm −2 . The designed cathode-free aqueous iron-ion battery demonstrates a long cycling life of up to 2000 cycles, representing a new direction for the development of aqueous iron-ion batteries.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2012
·Vol. 22
·期 8
·3404-3410
·
IF 5.968
Xiao-lei Huang,Jia Chai,Tao Jiang,Ying-Jin Wei,Gang Chen,Wan-qiang Liu,Dongxue Han,Li Niu,Limin Wang,Xin-bo Zhang
Large-area Co(OH)2 nanosheets have been successfully coated with ionic liquid modified graphenevia a general strategy. The advantageous combination of graphene and the 2D structure of the Co(OH)2 nanosheets endows the obtained heterostructures with a remarkable lithium-storage performance, including high reversible capacity and superior cyclic and rate performance.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Huajun Zhou,Yuzhen Zhang,Chenxi Shi,Kai Yuan,Rui Zhou,Peihua Zhao,Yongping Qu,Yanzhong Wang
Efficient and inexpensive oxygen evolution reaction (OER) catalysts are essential for the electrochemical splitting of water into hydrogen fuel. Herein, we have successfully synthesized NiCoFe(OH) x nanosheets on Ni-Fe foam (NFF) by exploiting the Fenton-like effect of Co 2+ and S 2 O 8 2− to corrode the NFF foam. The as-prepared NiCoFe(OH) x /NFF exhibits the porous structure with the interconnected nanosheets that are firmly bonded to the conductive substrate of NFF, thereby enhancing ions and charge transfer kinetics. The unique structure and composition of NiCoFe(OH) x /NFF result in the low overpotentials of 200 and 262 mV at current densities of 10 and 100 mA cm −2 , respectively, as well as a low Tafel slope of 53.25 mV dec −1 . In addition, NiCoFe(OH) x /NFF displays low overpotentials of 267 and 294 mV at a high current density of 100 mA cm −2 in simulated and real seawater, respectively. Furthermore, the assembled NiCoFe(OH) x //Pt/C water electrolysis cell has achieved a current density of 10 mA cm −2 at a low voltage of 1.49 V, and displayed the good stability with slight attenuation for 110 h. The high OER performance of NiCoFe(OH) x is attributed to the co-catalytic effect of the three metal ions and the interconnected porous nanosheet structure.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2024
·
IF 14.3
Jin Li,Qiuling Jiang,Xiujing Xing,Cuilian Sun,Ying Wang,Zhijian Wu,Wei Xiong,Hao Li
Electrochemical conversion of nitrate (NO 3 − ) to ammonia (NH 3 ) is a potential way to produce green NH 3 and remediate the nitrogen cycle. In this paper, an efficient catalyst of spherical CuO made by stacking small particles with oxygen-rich vacancies is reported. The NH 3 yield and Faraday efficiency are 15.53 mg h −1 mg cat −1 and 90.69%, respectively, in a neutral electrolyte at a voltage of -0.80 V (vs. reversible hydrogen electrode). The high activity of the electrodes results from changes in the phase and structure during electrochemical reduction. Structurally, there is a shift from a spherical structure with dense accumulation of small particles to a layered network structure with uniform distribution of small particles stacked on top of each other, thus exposing more active sites. Furthermore, in terms of phase, the electrode transitions from CuO to Cu/Cu(OH) 2 . Density functional theory calculations showed that Cu(OH) 2 formation enhances NO 3 - adsorption. Meanwhile, the Cu(OH) 2 can inhibit the competing hydrogen evolution reaction, while the formation of Cu (111) crystal surfaces facilitates the hydrogenation reaction. The synergistic effect between the two promotes the NO 3 - to NH 3 . Therefore, this study provides a new idea and direction for Cu-based oxides in electrocatalytic NH 3 production.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Kunfeng Zhang,Jinxia Liang,Sainan Yang,Fangfei Song,Hongxia Chen,Baozhong Zhang,Bo Peng,Hanyu Chen,Hongxing Dai
Constructing an S-scheme heterojunction presents an effective strategy to enhance photocatalytic efficiency via accelerating photoexcited charge separation while preserving strong redox potentials. Herein, amorphous Ni(OH) 2 (a-NH) was in-situ integrated with crystalline Bi 12 O 17 Br 2 (BOB) nanosheets to form an amorphous/crystalline a-NH/BOB S-scheme heterojunction. The as-synthesized a-NH/BOB-0.5 photocatalyst exhibited superior bisphenol A (BPA) degradation efficiency, achieving 48.7 and 3.7-fold enhancements compared to individual a-NH and BOB, respectively. Comprehensive investigations revealed that the improved photocatalytic activity originated from the synergistic effects of enhanced light-harvesting ability and the formation of strong interfacial electric field at the amorphous/crystalline interface. Moreover, the influences of solution pH, coexisting anions, and water matrices on BPA degradation efficiency were also investigated. Reaction mechanism and toxicity assessment demonstrated that BPA could be gradually transformed into small molecules with low toxicity. This work demonstrates an efficient approach for the design of high-performance photocatalysts for environmental remediation by constructing amorphous/crystalline interface and S-scheme charge transfer mechanism.
✓ 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）