Nanomaterials
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2026
·Vol. 16
·期 4
·250
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IF 4.8
Yingxing Yang,Yihan Zheng,Mengyao Zhao,Xiaomei Yu,Songjie Li,Jinyou Zheng
As a renewable energy source, solar energy holds significant potential for addressing future energy and environmental challenges. Concurrently, hydrogen (H2), as a clean and renewable energy carrier, has garnered substantial attention. Photoelectrocatalytic water splitting to produce H2represents an emerging green technology for converting solar energy into hydrogen energy, which has been highly valued by researchers. The key to advancing this technology lies in identifying photoelectrode materials with high catalytic activity and stability. In this study, dendritic α-Fe was synthesized via electrodeposition at the optimal potential of −1.4 V vs. Ag/AgCl for 300 s, and the photoelectrocatalytic performance of α-Fe2O3@Fe was enhanced through partial oxidation annealing at 300 °C for 6 h. This approach effectively addressed the issue of the short carrier transport distance in α-Fe2O3. The resulting partially oxidized α-Fe2O3@Fe(300 °C, 6 h) exhibited a photocurrent density of 281.1 μA/cm2at +0.55 V vs. Ag/AgCl, which was 2.23 times higher than that of the fully oxidized dendritic α-Fe2O3(500 °C, 2 h) (125.8 μA/cm2). The influence of deposition potential on photoelectrocatalytic performance was systematically explored, and the optimal deposition potential was identified. Additionally, surface modification with 0.15 wt% Pt (ultra-low loading) was employed to further improve the photocatalytic stability of α-Fe2O3(500 °C, 2 h). After continuous operation for 2 h, the photocurrent of the surface-modified sample decreased by only 6.5%, indicating a substantial enhancement in stability.
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Catalysis Science & Technology
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2026
·
IF 4
Qiao Zeng,Jinshan Chen,Chi Wang,Kai Li,Yi Mei
Photocatalytic reduction of CO2 into CH4 represents a sustainable strategy for carbon recycling, yet achieving efficient multi-electron transfer and selective C–H bond formation remains challenging. Herein, we construct a cooperative multi-interfacial photocatalytic system by integrating copper phthalocyanine (CuPc) and photodeposited Pt nanoparticles onto a TiO2@TPA hybrid. The TiO2@TPA framework, derived from MIL-125 hydrolysis, provides robust Ti–O–C linkages and intrinsic ligand-to-metal charge transfer (LMCT) channels, while CuPc extends visible-light absorption and facilitates interfacial electron delocalization and migration through its π-conjugated macrocycle. Pt nanoparticles exhibit dual functionality—as electron sinks on TiO2 for multi-electron CO2 reduction and as interfacial bridges promoting charge transfer between TiO2 and CuPc. Comprehensive spectroscopic and photoelectrochemical analyses confirm efficient carrier separation, accelerated interfacial charge transfer, and strong electronic coupling at the heterointerfaces. The optimized TiO2@TPA(15Pt,5Cu) catalyst achieves a CH4 evolution rate of 199.2 μmol·g-1·h-1 with 99.9% selectivity, markedly outperforming single-component or monometallic counterparts. In-situ FTIR spectroscopy reveals successive *COOH, *CO, *CHO, and *CH intermediates, validating the multi-step hydrogenation mechanism. This work extends LMCT-based interface engineering toward deep CO2 methanation, offering new insights for the rational design of highly efficient and selective multi-electron photocatalysts.
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ACS Catalysis
·
2026
·
IF 13.6
Yongqi Zhao,Junjie Jiang,Xue Li,Xiaolong Liu,Tingyu Zhu
H2 treatment induces a distinct strong metal−support interaction (SMSI) on the Pt/TiO2 catalyst surface, generating highly stable Pt nanoclusters (Pt-NCs) and abundant oxygen vacancies (Ov), which significantly increase the CO oxidation activity. In this study, a 0.1Pt/Ti catalyst was initially subjected to H2 pretreatment and then exposed to air to obtain the 0.1Pt/Ti-H2-Air catalyst. Compared with the untreated 0.1Pt/Ti catalyst, both the 0.1Pt/Ti-H2 and 0.1Pt/Ti-H2-Air variants exhibited enhanced performance in the catalytic oxidation of CO. Notably, the TOF of 0.1Pt/Ti-H2 reached 3.87 s−1, representing a 97-fold increase over that of the untreated catalyst (TOF = 0.04 s−1), whereas the TOF of 0.1Pt/Ti-H2-Air was reduced to 0.21 s−1, reflecting the gradual consumption of Ov during the reaction. A comprehensive characterization revealed that the synergistic interaction between the Pt-NCs and oxygen vacancies facilitated the catalytic oxidation process. As the reaction proceeds, the number of oxygen vacancies gradually decreases, yet the Pt-NCs remain structurally stable and continue to play a pivotal role-underscoring the importance of reductive pretreatment in sustaining high catalytic activity under oxidizing conditions.
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ACS Applied Materials & Interfaces
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2026
·
IF 7.8
Yunsong Wang,Nannan Zheng,Shujuan Liu,Shiping Yuan,Kai Li,Jinghuai Zhang,Yishan Gao,Liangcan He,Wei Cai,Shaoqin Liu
Triple-negative breast cancer (TNBC) exhibits strong radiotherapy resistance. A cascade system of Pt/SnO2–x@PDA@CaP-GOx initiated by X-rays was innovatively proposed first to enhance the radiotherapy sensitivity in terms of hypoxia-related radiotherapy resistance. By using the X-ray-responsive cascade system, not only the penetration depth could be ignored but also the advantages of radiotherapy could be effectively utilized. Through alleviating hypoxia and boosting reactive oxygen species (ROS) generation, excellent radiosensitivity could be achieved by the X-ray-responsive cascade enzymatic reaction system. Including H2O2 formation, O2 production, and ROS release, a series of explorations confirmed the formation of a complete X-ray-responsive cascade system. In vitro studies on 4T1 cells demonstrated that 81% killing rate could be achieved by the cascade system through DNA damage and HIF-1α regulation to alleviate hypoxia. The tumor proliferation was effectively inhibited, and its volume has reduced to 3% of the original solid tumor in the in situ transplantation tumor model. This work presents Pt/SnO2–x@PDA@CaP-GOx as a highly effective X-ray-responsive radiosensitizer, offering a promising strategy for TNBC radiotherapy.
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CLAY MINERALS
·
2026
·
IF 2.1
Sisi Hu,Xiangwei Zhang,Jielong Cao,Qingze Chen,Runliang Zhu
The reduction of volatile organic compounds (VOCs), especially the oxidation of highly toxic and chemically resistant toluene, remains a challenge in environmental catalysis. In this research, a porous TiO2/SiO2 support was initially fabricated through titanium pillaring of montmorillonite and then calcined and acid-leached as an efficient platform for Pt nanoparticle immobilization to yield Pt–TiO2/SiO2. The experimental data showed that the catalyst loaded with 0.37 wt.% Pt (0.37Pt–TiO2/SiO2) exhibits superior toluene oxidation performance, reaching a T90 of 190°C. Moreover, the catalyst exhibited remarkable water resistance, maintaining high efficiency even in the presence of 10% water vapour and outstanding long-term stability, with no substantial deactivation after 48 h of continuous operation. The performance improvement is explained by the high dispersion of Pt nanoparticles on the support and the metal–support interaction between Pt and TiO2, characterized by electron transfer from TiO2 to Pt. This interaction facilitates the adsorption and activation of reactant molecules. In situ diffuse reflectance Fourier-transform infrared spectroscopy explained the catalytic mechanism: toluene is sequentially transformed into benzyl alcohol, benzaldehyde and benzoate intermediates, which are subsequently converted to maleic anhydride by opening the ring and eventually mineralized into CO2 and H2O. This work developed a high-performance, durable catalyst using cost-effective and abundant natural minerals, offering promising prospects for practical abatement of industrial VOCs.
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Nature Communications
·
2026
·Vol. 17
·期 1
·9477
·
IF 18.1
Jiang Wenxing,Liu Yong,Wan Qiqi,Zhang Endao,Shen Xiaodong,Jiang Kaiyue,Zhuang Xiaodong,Ke Changchun
Direct borohydride fuel cells (DBFCs) exhibit a high theoretical energy density of 9946 Wh L −1 , yet their application is hindered by the competition between the target 8-electron borohydride oxidation reaction (8e-BOR) and the parasitic incomplete borohydride oxidation reaction (i-BOR). Herein, we resolve this activity-selectivity trade-off by synergistically regulating the electronic and geometric structures of ordered Pt-based intermetallic catalysts (IMCs). Pt-Fe orbital coupling lowers the d -band center by 0.37 eV, weakening the adsorption of intermediates that trigger i-BOR. Meanwhile, the ordered lattice isolates Pt sites, disrupting the continuous Pt-Pt ensembles required for i-BOR. This dual regulation effectively suppresses hydrogen evolution, yielding a near-ideal electron transfer number of 7.72. A DBFC using a Pt-Fe IMC anode delivers a peak power density of 1208 mW cm −2 with 60.3% fuel utilization. Scalability is further demonstrated through a 1.3 kW industrial stack, confirming its practical potential. This work provides a general strategy for managing selectivity in complex electrocatalytic systems.
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Carbon Energy
·
2026
·
IF 21.4
Liangmeng Ni,Aiyue Huang,Xin Feng,Zhijia Liu
Proton exchange membrane (PEM) electrolysis demands hydrogen evolution reaction (HER) cathodes that minimize precious-metal usage while remaining durable in strongly acidic media, yet improving Pt utilization and stability under reduced PGM loading remains challenging. Here, we develop a programmable nucleation pathway that uses in situ H* from formic acid (HCOOH) dehydrogenation at a Ru–Pd interface to gate reducing equivalents during nucleation. This enables site-confined Pt nucleation/immobilization and stabilizes a hydrogen-management interface for H* generation, relay, and recombination. The resulting Ru–Pd–Pt/C comprises uniformly dispersed ternary nanodomains (~2.46 nm). In 0.5 M H 2 SO 4 , Ru–Pd–Pt/C delivers η 10 = 12.24 mV, an apparent Tafel slope of 29.9 mV dec −1 from a unified 20–50 mV fitting window, and a PGM mass activity of 6.58 A mg PGM −1 at η = 50 mV. More importantly, membrane electrode assembly tests under identical assembly conditions show lower cell voltages than commercial 40 wt% Pt/C over 1–4 A cm −2 and stable operation at 1 A cm −2 . Density functional theory calculation shows Ru/Pd neighbors tune Pt toward near-thermoneutral H adsorption (ΔG H* = −0.19 eV), consistent with density of states/d-band shifts and the improved apparent HER response. This formation-stage programming offers a transferable framework for durable, low-PGM HER cathodes in acidic water electrolysis.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Gaoqing Cao,Zhimin Feng,Haitao Yuan,Shiyue Ren,Yue Lei,Lihong Hu,Yingnan Duan,Weizun Li,Zhurui Shen
Cd vacancies precisely anchor Pt/Pd sub-nanoclusters to boost interfacial electron transfer. • The vacancy-stabilized PtPd interface steers the CO 2 reduction pathway toward CH 4 . • DFT and in situ DRIFTS unveil stabilized intermediates (*CH 3 O) and suppressed CO desorption. • The optimized catalyst achieves a 119.5-fold enhancement in CH 4 yield over pristine CdS. Selective photoreduction of CO 2 to deeply hydrogenated products remains challenging due to the competitive formation of CO and insufficient surface hydrogenation capability. Herein, a vacancy-stabilized Pt/Pd sub-nanoclusters interface is constructed on a Cd-based semiconductor to preferentially facilitate surface reaction pathways toward CH 4 production. Cd vacancies are proposed to serve as preferential anchoring and electronic modulation centers, promoting the formation of Pt/Pd interfacial sites with strong metal support interactions, and facilitating electron transfer. Multiple characterization techniques confirm that the Pt/Pd sub-naoclusters interface is preferentially stabilized at vacancy-rich regions and exhibits pronounced electronic coupling. In situ DRIFTS reveals the emergence of key hydrogenated intermediates on the Pt/Pd interfacial surface, indicating a surface-mediated pathway shift from CO desorption to deep hydrogenation. Density functional theory (DFT) calculations further confirm enhanced CO 2 activation and stabilization of hydrogenation intermediates at the vacancy-coupled Pt/Pd sub-nanoclusters. Compared to pristine CdS and Cd 1-x S, the Pt/Pd-Cd 1-x S photocatalyst achieved 119.5-fold and 14.9-fold enhancements in CH 4 yield, respectively. Consequently, the engineered interfacial surface achieves a significantly enhanced methane selectivity during CO 2 photoreduction. This work highlights the important role of vacancy-mediated dual metal interfaces in promoting surface reaction pathways and provides new insights into the rational design of selective CO 2 photoreduction catalysts from a surface science perspective. Download: Download high-res image (169KB) Download: Download full-size image
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JOURNAL OF NANOBIOTECHNOLOGY
·
2026
·
IF 15
Liu Wen,Jia Bin,Yang Feiya,Yin Lu,Tian Ziru,Sheng Guoli,Wang Wenkuan,Gao Yunhao,Zhang Lingpu,Wei Wenqiang,Xiao Haihua,Xing Nianzeng
Intravesical therapy is widely used in the management of bladder cancer. Nevertheless, continuous urinary flow accelerates the elimination of intravesically administered drugs, thereby reducing bladder residence time and therapeutic efficacy. Agents targeting the cyclic GMP-AMP synthase-stimulator of interferon genes (cGAS-STING) pathway have shown promising antitumor activity, yet their clinical translation is hindered by low local bioavailability and insufficient tumor selectivity. Here, a glutathione (GSH)-responsive nanoplatform, NP MP @Pt-MSA, was developed to integrate mucoadhesion with charge-mediated tissue penetration, thereby prolonging bladder retention and enhancing transurothelial delivery during intravesical administration. Upon cellular internalization, NP MP @Pt-MSA releases a Pt(IV) prodrug and the STING agonist MSA. DNA damage induced by the Pt(IV) prodrug promotes cytosolic dsDNA accumulation and activates the cGAS-STING pathway, while MSA further amplifies STING signaling, resulting in enhanced chemo-immunotherapeutic effects. In vivo, intravesical administration of NP MP @Pt-MSA significantly inhibited tumor growth, enhanced antitumor immune responses, and remodeled the immunosuppressive tumor microenvironment. Collectively, these findings establish a multifunctional intravesical delivery strategy that integrates mucoadhesive and tissue-penetrating nanoparticle design with dual chemo-immunomodulation, offering a promising approach to improve local therapy for bladder cancer. Graphical abstract
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Nano-Micro Letters
·
2026
·Vol. 18
·期 1
·350
·
IF 38.5
Chen Xue-Lu,Liu Yu-Yang,Biswas Sudip,Yang Yi,Shi Yi,Liu Chun-Gen,Xia Xing-Hua
Site-specific underpotential deposition strategy enables precise spatial control over atomic-level active sites, enriching adjacent Pt sites while tuning oxidation states
Adjacent-site proximity dominates hydrogen evolution reaction (HER) activity, with adjacent Pt sites deliver a 41-fold higher mass activity than isolated Pt sites.
Pt–H–Pt bridge intermediate at adjacent sites lowers the H–H coupling barrier and accelerates HER kinetics.
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TALANTA
·
2026
·
IF 6.7
Xue Cheng,Shuaishuai Wei,Yu Li,Gengli Huang,Yuxing Yan,Zhouping Wang
Nanozyme-based aptasensors still face challenges, including low catalytic activity and inverse signal correlation, which hinder their advancement in the field of food safety. To address these issues, this study developed a novel nanozyme-based colorimetric aptasensor for the high-performance detection of AFB1. Initially, a gold-silver alloy nanoframework (Au-Ag NFs) was synthesized using liposomes as a template, followed by the deposition of platinum nanoclusters on its surface, resulting in the successful preparation of the Au-Ag NFs@Pt NCs nanozyme. This nanozyme exhibited outstanding oxidase-like activity, efficiently catalyzing the oxidation of TMB, leading to a significant increase in absorbance at 652 nm and a visually observable blue color. The AFB1-specific aptamer was covalently immobilized onto the nanozyme surface through Au-S bonds, forming the Au-Ag NFs@Pt NCs@apt complex and enabling the construction of an integrated “recognition-catalysis” sensing system. Upon target recognition by the aptamer, conformational changes in the Au-Ag NFs@Pt NCs @apt-target complex reduced the masking effect of the aptamer on the surface of the nanoenzyme, thereby enhancing oxidase-like activity. Ultimately, this colorimetric aptasensor achieved an enzyme-like “turn-on” detection of AFB1. The aptasensor achieved a detection limit as low as 22.3 pg/mL, and demonstrated excellent selectivity, stability, and satisfactory recovery in spiked peanut samples. This work not only provides a promising new approach for on-site rapid screening of AFB1, but also offers novel composite material insights for designing high-performance nanozyme sensing platforms targeting other analytes.
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Journal of Energy Chemistry
·
2026
·
IF 15.6
Shi-Min Li,Gui-ming Wu,Jun-Fei Shen,Lin-Zhi Chen,Na Tian,Chang Wang,Hai-Wei Liang,Zhi-You Zhou,Shi-Gang Sun
The construction of ordered Pt-based intermetallic compounds (IMCs) has emerged as an effective approach to improve the activity and durability of catalysts for the oxygen reduction reaction. However, the synthesis, especially for Pt-Ni IMCs, is often hindered by their low disorder-order phase transformation temperatures ( T PT ). Here, we report a general synthetic strategy by introducing transition metals (M = Ti, V, Cr, Mn, and Fe) capable of forming high- T PT (≥1000 °C) PtM IMCs, which can effectively elevate the T PT of Pt 3 Ni and PtNi alloys and promote their ordering degree. In situ high-temperature X-ray diffraction (HT-XRD) results confirm that Ti doping greatly increases the T PT of Pt 3 Ni from 490 to over 800 °C, enabling the formation of the ordered IMCs. The optimized Pt 3 Ni 0.7 Ti 0.3 catalyst achieves mass activity and specific activity of 1.35 A mg Pt −1 and 1.78 mA cm −2 , respectively, higher than those of Pt/C and Pt 3 Ni, while holding high stability. This work establishes a broadly applicable strategy for the synthesis of Pt-based IMCs, offering a pathway to durable, high-performance fuel-cell catalysts.
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