INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Chen Chen,Xu Guan,Hongbo Wang,Shijie Dong,Ping Luo
In this paper, a novel Al–Bi(OH) 3 system hydrogen-generating material is investigated. Hydrolysis experiments show that the hydrolysis properties of the Al–10 wt% Bi(OH) 3 composite are significantly improved by doping with sodium chloride, and the Al–10 wt% Bi(OH) 3 –5 wt% NaCl composite has a low activation energy (10.4 kJ mol −1 ). With the further optimization of milling time, the hydrogen yield of Al–10 wt% Bi(OH) 3 –5 wt% NaCl composite reaches 1000 mL g −1 in 1 min. X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, energy-dispersive spectroscopy and thermogravimetric analysis are applied to characterize the composite and explore the hydrolysis mechanism. The characterization results show that the activation of aluminum mainly comes from three factors: (1) The formation of alumina during ball milling plays an important role in preventing the agglomeration between Al–Bi, Al–Al and Bi–Bi; (2) Bismuth generated during ball milling can form micro-galvanic cell with aluminum to promote the corrosion of aluminum; (3) Sodium chloride as a grinding aid contributes to crush aluminum powder , and chloride ions facilitate the corrosion of aluminum in the hydrolysis process . In addition, the drying method and initial water temperature have a great influence on by-products. The composite is expected to be used in mobile emergency fuel cell due to its rapid hydrogen production capacity.
研究领域:
材料科学
·
化学工程
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Linkun Liang,Xueping Zheng,Yifang Yao,Shenglin Liu,Jianzhong Wang,Wenshuai Liu,Chunxu Hu,Yuxuan He
In the context of hydrogen energy development, hydrogen production technology based on the hydrolysis of sodium borohydride (NaBH 4 ) has attracted considerable attention owing to its mild reaction conditions and the high-purity hydrogen generation. Nevertheless, the intrinsically sluggish hydrolysis kinetics of NaBH 4 require the development of non-noble metal catalysts that simultaneously achieve high catalytic activity and excellent durability. In this work, a molybdenum-doped cobalt hydroxide (MoO 2 -Co(OH) 2 ) catalyst was fabricated via a homogeneous urea precipitation approach, and its catalytic performance for H 2 generation from NaBH 4 hydrolysis was systematically evaluated. Concurrently, SEM, TEM, and XPS characterizations collectively elucidated the reaction pathway and electronic modulation mechanism involving Mo-doping-induced Co 2+ oxidation and oxygen vacancy generation. Additionally, this study demonstrates that the composite material possesses favorable surface hydrophilicity and exceptional synergistic catalytic activity. Through systematic modulation of the Mo/Co molar ratio, the MoO 2 -Co(OH) 2 catalyst achieved an exceptional hydrogen generation rate (HGR) of 9831.46 mL·min −1 ·g −1 at ambient temperature, concomitant with a markedly reduced activation energy (38.81 kJ·mol −1 ) relative to pristine Co(OH) 2 (68.97 kJ·mol −1 ). Furthermore, the catalytic performance of this system is comparable to, or even superior to, that of state-of-the-art Co-based catalysts. The superior catalytic performance was ascribed to the synergistic contributions of abundant defect sites afforded by the amorphous architecture, the intrinsically enhanced activity stemming from the electronic structure modulation, and the enhanced stability endowed by the compact microstructure.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Qian Li,Tong Yu,Tangze Deng,Jie Zhang,Jinwei Chen,Gang Wang,Zongbo Shi,Runsheng Zhuo,Ruilin Wang
Surface hydroxyl modulation on S-1 enables the rational design of PtCu catalyst. • Surface OH modulates particle surface density and promotes PtCu interaction. • The optimal 0.5Pt2Cu/S-1–950 demonstrated an approving PDH activity. Propane dehydrogenation (PDH) is a promising approach for propylene production. However, Pt-based catalysts suffer from severe coke deposition and metal sintering at high temperature, thus leading to a rapid deactivation and low propylene yield. Herein, a surface hydroxyl (OH) strategy is developed to modulate the dispersion and configuration of PtCu active sites on silicalite-1 (S-1). The precise regulation of OH density effectively optimizes the particle density of PtCu species. The properly introduced surface OH provides suitable sites to anchor the PtCu active sites with an enhanced catalytic activity and stability. The optimal 0.5Pt2Cu/S-1–950 catalyst achieves an initial propane conversion of 63.4%, propylene space–time yield of 0.60 g g cat. -1 h −1 , and exceptional long-term stability. Moreover, the catalyst also exhibits low coke formation rate with a total coke content of only 1.5 wt% after 6 h of reaction, thereby avoiding the coverage of active sites. The surface Si-OH-modulation offers an effective strategy for constructing high-efficiency Pt-based catalysts with an improved durability for propane dehydrogenation. Download: Download high-res image (111KB) Download: Download full-size image
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Small
·
2026
·
IF 11.8
Zhiang Hou,Rui Hu,Yitong Chen,Jinnan Wang,Aimin Li
The spin state of oxygen intermediates constitutes a fundamental limitation to the four-electron oxygen evolution reaction (OER), impeding efficient photoelectrochemical water splitting. Herein, guided by the chiral-induced spin selectivity (CISS) effect, we design a chiral L-Co (3−x) Ni x O 4 /BiVO 4 photoanode that employs a chiral co-catalyst layer to accelerate the evolution of oxidative intermediates. Kinetic isotope experiments, in situ attenuated total reflection Fourier Transform infrared spectroscopy and density functional theory calculations demonstrate that aligning the spin states of charge carriers via chiral molecules facilitates the rapid conversion of * OH to * OOH. Meanwhile, this process effectively suppresses the formation of hydrogen peroxide (Faradaic efficiency < 10%) and improves photoanode stability. Consequently, the L-Co (3−x) Ni x O 4 /BiVO 4 photoanode achieves a photocurrent density of 5.41 mA·cm −2 at a potential of 1.23 V vs. the reversible hydrogen electrode, and maintains stable operation for over 100 h at the working voltage. This work unravels the underlying mechanism by which the CISS effect governs the OER pathway and mediates the formation of key reaction intermediates and provides a viable spin-engineering route to efficient and stable photoanodes.
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Nature Communications
·
2026
·
IF 18.1
Li Yang,Wang Shuijing,Yuan Mingyue,Du Yu,Cai Yingying,Miao Tangying,Kou Jiahui,Yan Shicheng,Lu Chunhua
The realization of multi-energy water oxidation systems is impeded by the challenge of integrating multiple energy inputs. Here, we overcome this limitation via ultrasonic pre-treatment of the electrolyte, which triggers a mechano-electrochemical coupling effect through piezoelectric polarization. This process promotes a Grotthuss-type OH − state that weakens O-H bonds and increases the interfacial OH − concentration, thereby influencing the electrochemical reconstruction of Ni(OH) 2 to NiOOH and modifying water electrolysis pathways. These changes enhance Ni-O covalency and synergistically activate two low-energy water oxidation pathways on NiOOH involving lattice oxygen: one couples lattice oxygen with adsorbed oxygen, while the other facilitates direct lattice oxygen-oxygen coupling. Both routes bypass the high-energy * OOH intermediate typical of the conventional adsorbate evolution mechanism ( * OH → * O → * OOH → O 2 ), with the latter also avoiding * O adsorption entirely. Notably, just one minute of ultrasonic stimulation reduces the overpotential by 222 mV at 100 mA cm -2 . This pulsed-energy strategy thus offers an efficient and scalable approach to realizing multi-energy-enhanced water splitting.
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CHEMISTRY OF MATERIALS
·
2026
·
IF 7.1
Luyong Zhang,Jianyi Zuo,Guangsheng Xu,Jinbin Fan,Xue Bai,Zhihua Yang,Fangfang Zhang,Shilie Pan
Deep-ultraviolet (DUV) birefringent crystals are essential for modern optical technologies, yet achieving a balance between large birefringence and a wide bandgap remains challenging. Although conventional borosulfates with alternating [BO4] and [SO4] tetrahedra connected by sharing corners possess a wide bandgap, they suffer from small birefringence due to weak optical anisotropy resulting from the presence of only tetrahedral groups. This work introduced advantageous “genes” [BO2(OH)] groups to modify the common [B(SO4)4] supertetrahedra for the first time and ultimately produced two borosulfates, Na3B3S2O11(OH)2 and K3B3S2O11(OH)2, striking the balance. Isolated fundamental building block (FBB) [B3O3(OH)2(SO4)2] was observed in the two compounds. Additionally, three conventional borosulfates featuring isolated [B(SO4)4] supertetrahedra, Na4KB(SO4)4, Na4RbB(SO4)4, and Na3Cs2B(SO4)4, were also obtained for comparison. Structural analysis and theoretical calculations reveal that the directional alignment of [BO2(OH)] groups significantly enhances the birefringence of the borosulfates. The calculated birefringence at 1064 nm increases by approximately 10-fold, specifically from 0.0035–0.0047 for the three conventional borosulfates to 0.043–0.044 for the two hydroxylated ones. This work demonstrates the effectiveness of employing [BO2(OH)] groups in optimizing the optical anisotropy of borosulfates, providing a design paradigm for exploring advanced DUV birefringent materials in borosulfates.
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Inorganics
·
2025
·Vol. 13
·期 7
·211
·
IF 3
Wen Li,Di Yin,Wanxin Liu,Yi Li,Yijin Wu
The electrochemical oxidation of biomass-derived 5-hydroxymethylfurfural (HMF) coupled with water electrolysis for green hydrogen production is a promising strategy to address energy crises and environmental pollution. Despite the suitable adsorption energy for HMF due to their partially filled d-band electronic structures, Ni- or Co-based oxides/hydroxides still face challenges in insufficient activity and stability. In this study, a porous heterogeneous nickel cobalt oxide/hydroxide growth on nickel foam (NF), which is defined as NF@NiCo-H/O, was developed via immersion in concentrated alkali solution. Compared with the single-component NiCo oxides, the NF@NiCo-H/O catalyst exhibits a lower application potential of only 1.317 V, 1.395 V, and 1.443 V to achieve current densities of 20, 50, and 100 mA cm−2, respectively, in an alkaline solution containing HMF. Additionally, it demonstrates rapid reaction kinetics with a Tafel slope of 27.6 mV dec−1and excellent cycling stability. Importantly, the presence of more high-valent Ni3+-O species on the catalyst surface contributes to its exceptional selectivity for 2,5-furandicarboxylic acid (86.7%), Faradaic efficiency (93.1%), and conversion rate (94.4%). This catalyst provides some theoretical guidance for the development of biomass electrooxidation catalysts for sustainable energy and chemical production.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Zhang Tianyu,Wang Weibo,Liu Wenxian,Guo Zhengxiao,Liu Junfeng
Reconstruction of metal-organic frameworks often occurs under reaction conditions, thereby impeding true active species identification and hindering mechanism understanding. Herein, we present the mechanistic insight underlying the electrochemical synthesis of deprotonated anion of H 2 O 2 (HO 2 − ) via 2e − oxygen reduction by ultrathin Ni-benzenedicarboxylic acid (NiBDC), guided by its thickness-dependent performance and pH-induced reconstruction behavior. The real active species are identified as alkaline-reconstructed β-Ni(OH) 2 that is chemically coupled with 1,4-benzenedicarboxylic acid residual ligand. The hybrid catalyst is characterized to exhibit an optimized surface electronic structure, which improves the intrinsic activity and selectivity. Operando characterization and theoretical simulations further reveal that the residual ligand functionalization significantly boosts the formation and facilitates the adequate binding of *OOH intermediates. Thus, the ligand-functionalized Ni(OH) 2 exhibits high HO 2 − selectivity (>90%) in 0.1 M KOH across a broad current density up to 200 mA cm −2 . Moreover, high HO 2 − production rate of 13.7 mol g cat −1 h −1 with significant accumulation of 2.0 wt.% HO 2 − under alkaline conditions is achieved at 200 mA cm −2 over 100 h, suggesting the promising potential for large-scale electrosynthesis of HO 2 − in industrial applications.
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高影响因子
SURFACE REVIEW AND LETTERS
·
2020
·
IF 0.835
PENGHUI CAO,YUHUA YAN,XINLI TIAN,RUIZHUO OUYANG,YUQING MIAO
Oxygen evolution reaction (OER) is of great importance in splitting water. However, the sluggish OER kinetics at the anode severely hinders the H 2 evolution at the cathode which is a crucial procedure for energy storage. Herein, we report the synthesis of a new OER catalyst of Co(OH) x (WO 4 ) y via a one-step hydrothermal method, where the incorporation of WO 4 2 − as a condenser greatly enhanced the electrocatalytic activity of Co(OH) 2 toward OER. Moreover, the introduction of mesoporous carbon (MC) further improves the electrocatalytic performance of Co(OH) x (WO 4 ) y by forming the nanocomposites of Co(OH) x (WO 4 ) y /MC. The synergism between Co(OH) 2 and WO 4 2 − and the synergistic catalytic effect of Co(OH) x (WO 4 ) y and MC majorly contributed to the apparently enhanced electrocatalysis of Co(OH) x (WO 4 ) y /MC toward OER. This work provides an efficient strategy to improve the electrocatalytic activity of Co(OH) 2 by introducing WO 4 2 − and forming nanocomposites between Co(OH) x (WO 4 ) y and MC for low-cost, convenient and highly efficient water oxidation.
研究领域:
材料科学
·
电化学
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Runhua Gao,Handing Liu,Bowen Fu,Shuyang Li,Ziyao Long,Dalin Sun,Yun Song
Germanium-based materials possess high theoretical capacity of approximately 1000 mAh·g −1 , nevertheless, the practical electrochemical performance is severely hampered by poor cyclability due to volumetric expansion of Ge upon cycling. Herein, novel hydrangea-like CoGeO 2 (OH) 2 constructed by 2D nanoplates has been facilely synthesized with the assistance of ethylene glycol and further applied to anode materials for lithium ion storage. The hydrangea-like CoGeO 2 (OH) 2 anode exhibits an enhanced specific capacity of 1174 mAh·g −1 at a current density of 0.5 A g −1 after 100 cycles. Such outstanding electrochemical performance could be accredited to the rationally designed hydrangea-like structure, which can relieve the interval stress aroused by lithiation/de-lithiation, shorten the pathway of electron/ion transportation and take advantage of the pseudocapacitive nature of two dimensional nanosheets that could improve the reaction kinetics and endow the material with remarkable rate capability. Moreover, the inherent Co-bonded hydroxyl groups facilitate the pseudocapacitive effect, and Ge-based component contributes to the capacity. These advantages help CoGeO 2 (OH) 2 hydrangeas gain a competitive edge over other candidates of anode materials for lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
储能
·
纳米材料
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ELECTROCHIMICA ACTA
·
2013
·
IF 3.777
Zonghua Pu,Qian Liu,Abdullah H. Qusti,Abdullah M. Asiri,Abdulrahman O. Al-Youbi,Xuping Sun
The present communication reports on the first electrodeposition of Ni(OH) 2 on ZnO array supported on Ni foam. When applied as a binder-free electrode material for pseudocapacitive energy storage, the resulting ZnO@Ni(OH) 2 array exhibits a high specific capacitance of 2028 F g −1 at a current density of 10 A g −1 with good cycling stability. Meanwhile, the array exhibits a superb rate capability. Even at an extremely high current density of 100 A g −1 , the array still shows a very high specific capacitance of 1059 F g −1 .
研究领域:
材料科学
·
储能
·
电化学
·
纳米材料
✓ 已验证
DOI
高影响因子
Nano-Micro Letters
·
2026
·Vol. 18
·期 1
·288
·
IF 38.5
Hu Shangshu,Yang Jiao,Zhuang Yujuan,Li Xueyao,Xu Han,Hu Fuwang,Yan Zhishuo,Liu Chao,Yu Jianmin,Peng Lishan
The introduced Ce(OH)CO 3 optimizes charge distribution and enhances Lewis acidity of Ni/Fe sites, facilitating OH − adsorption.
The NiFe-layered double hydroxide/Ce(OH)CO 3 enables stable alkaline seawater electrooxidation for over 450 h at a high current density of 1 A cm −2 .
In an anion exchange membrane system, an energy efficiency of 65.21% is attained at 1 A cm −2 , with hydrogen production at a cost of USD 1.03 per gasoline gallon equivalent .
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