Fundamental Research
·
2025
·
IF 6.3
Zhong Wang,Tuo Zang,Ye Ziyu,Siyuan Zhang,Guojian Li,Xiaoming Liu,Qiang Wang,Shuang Yuan
Precise anchoring and high-density utilization of platinum single atoms (Pt SA ) remain critical challenges in advancing efficient hydrogen production via water electrolysis. Here, we present an innovative magnetic-field-assisted electrodeposition strategy for the controllable synthesis of high-density Pt SA on two-dimensional MXene substrates. Application of a 0.6 T magnetic field significantly enhanced Pt SA deposition kinetics, yielding a 2.1-fold increase in the deposition rate. Numerical simulations confirmed that magnetohydrodynamic (MHD) effects induced by the magnetic field were the primary mechanism driving this enhanced deposition efficiency. The optimized Pt SA -0.6@MXene/NF catalyst exhibited outstanding hydrogen evolution reaction (HER) performance in 1 M KOH, achieving an ultralow overpotential of 12 mV at 10 mA cm −2 , along with a Tafel slope of 29 mV dec −1 . Notably, the catalyst demonstrated 66.1-fold higher Pt mass activity (3458.7 A g −1 ) compared to commercial Pt/C (52.3 A g −1 ) at a 50 mV overpotential. Density functional theory (DFT) calculations revealed that the high-density Pt SA configuration synergistically enhances MXene's electrical conductivity while lowering the d-band center, thereby optimizing the energy barrier for hydrogen intermediate (H*) adsorption. This work provides a novel strategy for regulating the magnetic-field-assisted deposition of Pt SA catalysts, offering a new avenue for designing high-performance water electrolysis catalysts.
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高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 24
·
IF 4.3
Luan Liu,Hongru Liu,Zikang Chen,Genghua Cao,Xiaoyu Wu,Baorui Jia,Xuanhui Qu,Mingli Qin
A rapid solvent-free microwave-assisted strategy was developed to fabricate Pt- and Ni-modified Co(OH)2catalysts for alkaline hydrogen evolution. Among them, Ni-Pt@Co(OH)2, prepared via sequential Ni-first then Pt loading, exhibited the best performance. Structural analyses confirmed uniform Pt dispersion with dominant Pt(111) facets, while ICP-MS showed reduced Pt usage compared to Pt@Co(OH)2. Electrochemical measurements in 1.0 M KOH revealed an overpotential of 71 mV at 10 mA·cm−2, comparable to Pt/C, and a mass activity 4–6.5 times higher across 25–75 mV. EIS demonstrated lower charge-transfer resistance, and stability tests showed negligible degradation after 3000 CV cycles and 11 h continuous operation. The outstanding performance arises from enhanced Pt utilization, abundant conductive sites, and strong Ni-Pt interfacial synergy, highlighting Ni-Pt@Co(OH)2as a promising catalyst for efficient alkaline HER with reduced Pt consumption.
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DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Liang Xian,Shu Xin Liu,Jing Ma,Xiao Xia Tian,Wei Li,Zhao Min Liu
C60 has a spatial confinement effect as a carrier for Pt nanoparticles. In this paper, highly dispersed and uniformly sized ultrafine Pt nanoparticles (Pt/C60-A) were synthesized by a photoinduced method using green ascorbic acid as an auxiliary reducing agent in the presence of C60 space-confined. It was found that the morphology of Pt nanoparticles could be modulated by adjusting the wavelength of light (395 nm UV and 450 nm blue-violet, 650 nm red). Changing the concentration of the auxiliary reducing agent regulated the Pt nanoparticle loading and dispersion. In addition, an electron-rich surface is formed on the surface of Pt nanoparticles synthesized under strong metal-support interaction (SMSI). In the methanol oxidation reaction, the catalyst (Pt/C60-A3) prepared by 3 mL of 180 mM reductant, synergistically irradiated with blue-violet light (450 nm), showed catalytic activity and durability that were significantly better than those of commercial Pt/C catalysts. The catalytic performance of Pt/C60-A3 was unchanged before and after the durability test and showed high durability. In addition, Pt/C60-A3 also exhibits high catalytic activity and durability in the reduction of p-nitrophenol (4-NP), with an apparent rate constant (k) of up to 0.54 min-1, and the catalytic activity is still maintained at about 87% after seven cycles of the 4-NP reaction. This study provides a new insight and method for synthesizing and applying noble metal nanoparticles.
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高影响因子
FUEL
·
2025
·
IF 7.5
Yali Niu,Rui Yao,Shuhui Fan,Jinping Li,Guang Liu
Anion-exchange membrane water electrolyzers (AEMWE) are promising for clean hydrogen production. However, the high energy barriers associated with water adsorption and dissociation combined with the high adsorption energy of hydrogen intermediates (H*) in alkaline environment result in slow kinetics for the hydrogen evolution reaction (HER). To tackle this, we report a catalyst comprising Pt nanoparticles loaded on Co(OH) 2 /PTI nanosheets (Pt/Co(OH) 2 /PTI) for efficient alkaline HER at high current densities. Operando characterization indicates that Co(OH) 2 promotes H 2 O adsorption and dissociation, while the Pt nanoparticles optimize H* adsorption energy, enabling preferential H* adsorption at the Pt site to facilitate H 2 generation and desorption. Furthermore, the ultra-thin poly (triazine imide) (PTI) support prevents the Pt nanoparticles aggregation, thereby enhancing catalyst stability. As a result, the synergistic Pt/Co(OH) 2 /PTI achieves superior HER performance, demanding an overpotential of merely 7 mV to achieve a current density of 10 mA cm −2 and just 220 mV to drive 1 A cm −2 , and it maintains stable for over 220 h under the condition of 1 A cm −2 . Additionally, the electrolyzer assembled using Pt/Co(OH) 2 /PTI as the cathode demonstrates stable operation for 200 h at 0.5 A cm −2 under 70 °C, highlighting its strong potential for industrial applications.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Zhenjun Liu,Tianpei Yang,Yi Shen
The glycerol electrochemical oxidation (GEOR) represents a sustainable strategy for converting abundant biomass-derived feedstocks into high value-added chemicals. Herein, we prepared a series of Pt/Au/Ti catalysts via electrodepositing Pt nanoparticles (NPs) onto Au-sputtered Ti substrates (Au/Ti). The atomic Pt/Au ratio on the surface was engineered through pulse-deposition cycles. The structures of the catalysts were characterized by scanning electron microscopy, atomic force microscopy and X-ray diffraction, confirming that Pt NPs were uniformly deposited on the Au/Ti surface. Electrochemical evaluations demonstrated that the 10Pt/Au/Ti catalyst has superior GEOR performance in 1 M KOH solutions, achieving a peak current density of 13.16 mA cm −2 . Operando electrochemical impedance spectroscopy revealed that Au and Pt worked synergistically to promote the adsorption of adsorbed hydroxyl species ( OH ad ) and glycerol, thereby improving GEOR activity. Product analysis revealed that the 10Pt/Au/Ti catalyst yielded the highest glyceric acid selectivity of 93.6% at 0.9 V vs. RHE under alkaline conditions. This study provides an efficient strategy for the highly selective conversion of glycerol into high value-added C 3 products.
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高影响因子
CHEMISTRY OF MATERIALS
·
2025
·
IF 7
Jiale Han,Guofan Wang,Xu Hu,Jinlin Li,Zhaojun Xie,Zhen Zhou
Rechargeable lithium oxygen (Li–O2) batteries are regarded as promising candidates for future energy storage systems due to their exceptionally high theoretical energy density. However, their practical implementation faces major obstacles, including high charge and discharge overpotentials and a semiopen battery structure that is highly sensitive to humidity. These factors lead to reduced efficiency and poor stability in moist air, significantly limiting real-world application. To address these challenges, a composite photoelectrode was developed by directly growing tungsten trioxide (WO3) nanoribbons on carbon paper (CP), followed by the uniform deposition of platinum nanoparticles using atomic layer deposition. Compared to WO3 photoelectrode, the resulting Pt–WO3 photoelectrode enables stable operation of photoassisted Li–O2 batteries under humid oxygen atmosphere. The batteries sustain stable operation for over 100 cycles without failure at current densities of 0.05 and 0.2 mA cm–2. Advanced characterization and theoretical calculations confirm the formation of an ohmic contact between platinum and tungsten trioxide, which promotes the separation of photogenerated electrons and holes, improves charge transfer, and facilitates the reversible formation and decomposition of lithium hydroxide (LiOH). This strategy effectively overcomes critical barriers faced by conventional Li–O2 batteries in real-world environments and provides a promising direction for the design of environmentally tolerant and photoelectrochemically efficient energy storage systems.
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高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Yunyun Lin,Wenbo Li,Yuanyuan Cui,Yaying Li,Haifeng Wang,Qi Xiao,Wei Luo
Monolithic photocatalysts present a transformative paradigm to reconcile the activity-stability-recovery trade-off inherent in conventional powder systems for photocatalytic hydrogen evolution. This study demonstrates a low-temperature synthesis of mesoporous Pt/Cu/TiO2–N catalysts in situ grown on frosted glass (Pt/Cu/TiO2–N/FP), where nitrogen doping amplifies Ti–O–Ti vibrational coupling and the hierarchical mesostructure creates sufficient active sites. The engineered Pt–Cu dual-cocatalyst system achieves exceptional synergy: Pt nanoparticles drive proton reduction while Cu2+ species prolong charge carrier lifetime through the Cu2+/Cu+ redox cycle, collectively enabling light absorption to the visible range. With optimized dual cocatalyst decoration (1.1 wt % Pt, 0.3 wt % Cu2+), the monolithic mesoporous architecture delivers a stable hydrogen evolution rate of 187.1 μmol h–1. Importantly, our mild fabrication strategy (NH3 treatment at 100 °C, Cu2+ grafting at 60 °C) establishes a generalizable protocol for temperature-sensitive substrate functionalization. This work pioneers a dual-engineering approach combining substrate-compatible synthesis with electronic structure modulation, offering a pathway toward industrially viable solar hydrogen reactors.
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高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2017
·Vol. 19
·期 35
·24249-24254
·
IF 4.123
Guiyang Yu,Wenxiang Zhang,Jungang Cao,Wenfu Yan,Gang Liu
Spatial separation of the reduction center (photosystem I) and oxidation center (photosystem II) is an obvious characteristic of natural photosynthesis. Enlightened by this natural process, a simple material based on silica-sphere-supported Pt nanoparticles (SSP) was designed as a freestanding hydrogen evolution center for semiconductor photocatalysts. In situ photoluminescence characterization showed that the radiation recombination of electron–hole pairs in semiconductors (i.e. TiO2 and CdS) was well suppressed due to the presence of SSP. And the quenching efficiency increases with the hydrogen evolution rate of photocatalysts. These results indicated that SSP could effectively trap electrons from the photoexcited semiconductors during collision between SSP and semiconductor, and then complete the hydrogen evolution reaction over the Pt nanoparticles. Detailed investigation also showed that the performance of SSP was influenced by several factors, including the particle size of the silica sphere and the physical and chemical states of Pt nanoparticles. Besides, it was demonstrated that the loaded metal was not limited to Pt. Pd, Ni and Au can also be used as active sites in this freestanding cocatalyst strategy.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Sen Sun,Yan Wang,Li'na Wang,Tong Guo,Xiaorong Yuan,Dongxia Zhang,Zhonghua Xue,Xibin Zhou,Xiaoquan Lu
Here, a unique triple-layered core-shell structure (Au@N-CQDs@Pt) with an Au metal core, nitrogen-doped carbon quantum dots interlayer, and metal Pt outside shell was obtained by chemical reduction of HAuCl 4 and H 2 PtCl 6 in the presence of N-CQDs. The remarkable advantage of the method reported here is no any stabilizer or surfactant agent involved. The results of transmission electron microscopy (TEM), X-ray diffraction (XRD), energy-dispersive X-ray (EDX) spectroscopy, X-ray photoelectron spectroscopy (XPS) reveal that the as-prepared nanocomposites exhibit the nanostructured dendritic Pt and the quantity of Pt shell can be easily changed through controlling the synthesis time. Specifically, Au@N-CQDs@Pt displays excellent catalytic activity toward methanol oxidation reaction in alkaline condition than Au-Pt without N-CQDs, which indicate the useful application of CQDs in designing new catalysts to be used in direct methanol fuel cells.
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高影响因子
International Journal of Electrochemical Science
·
2023
·Vol. 7
·期 11
·10825-10834
·
IF 1.5
Zhenhua Yan,Min Wang,Baoxu Huang,Jinsheng Zhao,Renmin Liu
This work discusses a low-cost and high performance catalyst of the oxygen reduction reaction (ORR) in microbial fuel cells (MFCs). The catalyst was formed by Pt–Ni (15 wt% Pt) nanoparticles dispersed on carboxyl multi-wall carbon nanotubes (Pt-Ni/MWNT). The catalyst particle presents a nano- crystalline structure and has an average diameter of ca.7.1 nm based on the X-ray diffraction and transmission electron microscopy measurement. The electrocatalytic stability and activity of the catalyst was evaluated by cyclic voltammogram and chronopotentiometry. The MFC with a Pt-Ni/MWNT cathode produced a maximum power density of 1.22 W/m 2 , which was close to that with a Pt/C (20 wt% Pt) cathode (1.40 W/m 2 ); the Coulombic efficiency reaches 31.6%, which was better than that of the Pt/C (29.3%). The total cost of a Pt-Ni/MWNT catalyst was much lower than that of a Pt/C catalyst. Thus, the Pt-Ni/MWNT probably provides a new solution for finding effective cathode materials for MFC.
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高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Nadia Batool,Waseem Iqbal,Xiao-Feng Han,Wen-Tao Wang,Hao-Tian Teng,Xiang Hao,Ruizhi Yang,Jing-Hua Tian
Pt/C is one of the most favorable catalysts with high catalytic activity used in the oxygen reduction reaction (ORR). However, the synthesis of Pt/C with superior durability is still a significant challenge. Here, we introduced a simple technique to fabricate a Pt/N-C catalyst, having ultrasmall Pt nanocrystals encapsulated inside a nitrogen-doped carbon support, which is derived by the UiO-66-NH2 (MOF) using an impregnation technique, followed by a pyrolysis process. This Pt/N-C displays ORR activity and durability in alkaline solution with a half-wave potential of 0.90 V (vs RHE), limited diffusion current density of 5.5 mA cm–2, and only 5 mV deterioration in half-wave potential after testing 20,000 cyclic voltammetry (CV) cycles. In addition, it also shows good performance in acidic solution. In addition, Zn–air batteries (ZABs) assembled using the Pt/N-C air electrode display a high specific capacity of 825 mAh g–1, a high peak power density of 372 mW cm–2, and 208 h long cycle life. This offers an innovative approach for developing noble metal-based catalysts with unusual activity, stability, and a promising future for applications in metal–air batteries and fuel cells.
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高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Zhen Zhang,Ping Li,Qi Feng,Bing Wei,Chenglong Deng,Jiantao Fan,Hui Li,Haijiang Wang
Designing highly active, stable, and cost-efficient electrocatalysts as alternatives to replace Pt is extremely desirable for hydrogen evolution reaction (HER). Despite much progress that has been made based on complete nonprecious metals (NPMs), very few NPM catalysts have shown comparable performance to Pt-based catalysts. Herein, a cost-efficient, environmentally friendly, and scalable method to synthesize a novel ruthenium(Ru)-doped transition-metal carbide (Mo2C) hybrid catalyst was proposed. The hybrid nanoparticles were uniformly distributed and strongly embedded in a biomass-derived highly porous N-doped carbon framework. In particular, Mo2C@Ru exhibited a Pt-like remarkable electrocatalytic performance for HER, and it only required an extremely low overpotential of 24.6 mV to reach the current density of 10 mA cm–2. Furthermore, our density functional theory calculations indicated that the nanocomposite exhibits improved metal–hydrogen binding and favorable hydrogen adsorption energy, which is comparable to that of Pt. The facile and scalable synthesis methodology, the relatively low cost, and the excellent electrochemical HER performance comparable to that of commercial Pt/C suggest that the Mo2C@Ru electrocatalyst is a promising alternative to Pt for large-scale hydrogen production.
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