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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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Qian Wang,Hanyu Shi,Sihan Fang,Chengchen Wang,Jiming Zeng,Guobin Yang,Jun Li,Giuseppe Mele,Chen Wang
Photocatalytic technology, as an environmentally friendly and sustainable approach for hydrogen production, demonstrates significant market potential，where bimetallic single-atom catalysts (SACs) demonstrate superior performance compared to monometallic counterparts through heteronuclear synergistic effects, establishing them as a critical research focus in modern catalytic science. In this investigation, TiO₂ nanosheets were employed as catalytic supports, with oxygen vacancy defects being strategically introduced via H₂-Ar atmosphere thermal reduction to immobilize both monometallic Pt and bimetallic Pt-Pd single atoms. The hydrogen evolution rates were quantified as 1956.45 μmol·h⁻¹ ·g cat ⁻¹ for Pt-loaded catalysts and 3522.65 μmol·h⁻¹ ·g cat ⁻¹ for Pt-Pd-loaded systems, corresponding to 72.3-fold and 130.2-fold improvements relative to unmodified TiO₂. This performance enhancement is attributed to optimized charge carrier separation facilitated by oxygen vacancies and the complementary electronic interactions between Pt and Pd atoms in bimetallic configurations, which collectively promote efficient surface reactions and hydrogen generation kinetics. The remarkable advantages of bimetallic systems in photocatalytic hydrogen evolution are demonstrated through these findings, with Density Functional Theory (DFT) revealing that Pd incorporation not only modulates charge density and band structure through its role as a cocatalyst but also actively participates in the hydrogen evolution reaction as catalytic sites. The formation of Ti-Pt-Ti and Ti-Pd-Ti configurations is observed to effectively reduce reaction energy barriers while suppressing competitive adsorption at isolated metal sites, resulting in enhanced catalytic performance. A strategy for designing efficient photocatalysts is established through this work, supported by mechanistic insights into energy barrier reduction and adsorption regulation, which provides critical theoretical foundations with both scientific and practical significance.
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Ya-Qi Xue,Lei Wang,Yin Wang,Xiao Liu,Bin Lei,Xi-Ze Liu,Bo Li,Qian Yang,Jin Chang,Wei-Wei Ding,Jian-Gong Ma,Peng Cheng
Platinum-based hydrosilylation catalysts are primarily applied in the curing of silicone rubber. However, the commercial Karstedt catalysts used in industrial applications seriously suffer from rapid oxidation in air, uncontrolled activity at room temperature, rigorous storage conditions yet short pot-life, poor thermal stability, and complicated operation packages. Herein, Pt@MOFs, constructed by immobilizing catalytically active sites Pt inside the pores of a metastable MOF-based host with selected decomposition temperature, acts as a “controlled-release MOF-based capsule” to keep a long pot-life during storage and transport at ambient conditions, control the curing temperature of hydrosilylation, and releases the catalytically active Pt sites at required temperature for in situ polymer formation. Additionally, the unique nanosized crystalline MOF carriers are dominant for uniform dispersion in polysiloxanes and guarantee the excellent oxidation resistance in the Pt@MOFs catalytic system, which provides a new generation catalyst for widely used silicone rubber packages and an innovative pathway for the application of metastable MOF materials. Honeywell® has initiated kilogram-scale silicon rubber packages with Pt@MOFs.
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高影响因子
Nanomaterials
·
2026
·Vol. 16
·期 4
·250
·
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
·
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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Nature Communications
·
2023
·Vol. 14
·期 1
·1-12
·
IF 16.6
Chen Jianjun,Xiong Shangchao,Liu Haiyan,Shi Jianqiang,Mi Jinxing,Liu Hao,Gong Zhengjun,Oliviero Laetitia,Maugé Françoise,Li Junhua
The spillover of oxygen species is fundamentally important in redox reactions, but the spillover mechanism has been less understood compared to that of hydrogen spillover. Herein Sn is doped into TiO 2 to activate low-temperature (<100 °C) reverse oxygen spillover in Pt/TiO 2 catalyst, leading to CO oxidation activity much higher than that of most oxide-supported Pt catalysts. A combination of near-ambient-pressure X-ray photoelectron spectroscopy, in situ Raman/Infrared spectroscopies, and ab initio molecular dynamics simulations reveal that the reverse oxygen spillover is triggered by CO adsorption at Pt 2+ sites, followed by bond cleavage of Ti-O-Sn moieties nearby and the appearance of Pt 4+ species. The O in the catalytically indispensable Pt-O species is energetically more favourable to be originated from Ti-O-Sn. This work clearly depicts the interfacial chemistry of reverse oxygen spillover that is triggered by CO adsorption, and the understanding is helpful for the design of platinum/titania catalysts suitable for reactions of various reactants.
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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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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Tianran Chen,Renxu Zhang,Wei Feng,Min Zhang,Xubin Li,Fengqi Ji,Xiangdongfang Liu,Tao Wang,Jiayin Li,Lin Zhang,Guanghui Min,Guoqing Zhao
Flexible and heatable electrochromic smart windows. • Dense and dendrite-suppressed Zn electrodeposition during repeated plating/stripping cycles. • Ultrafast optical switching behavior driven by low operating voltage. • Long-term cycling stability exceeding 1000 coloration/bleaching cycles. Reversible Zn electrodeposition-based electrochromic smart windows are attractive owing to their simple configuration, fast optical response, and low energy consumption. However, uncontrolled dendritic growth of Zn during repeated electrodeposition severely limits the achievable coloring efficiency and long-term stability of such devices, hindering their commercial adoption. In this work, a Pt interfacial layer is introduced onto a flexible ZnO/Ag/ZnO/PET working electrode, effectively suppressing Zn dendritic growth and enabling the development of a flexible electrochromic device with enhanced performance and stability. Pt-induced abundant and uniform Zn nucleation leads to denser and less dendritic Zn electrodeposition, allowing a wide and reversible visible-light transmittance modulation from 6.2% to 60.5%, along with rapid coloring and bleaching response times of less than 6 s under ultra-low operating voltages. The device further exhibits stable electrochromic performance over 1000 cycles, excellent mechanical flexibility, and effective Joule heating capability for defrosting/defogging. This work provides an effective interfacial strategy for regulating repeated Zn electrodeposition and advances the development of flexible electrochromic smart windows for energy-efficient buildings and vehicles. A Pt interfacial layer is designed to suppress the dendritic growth of Zn on the working electrode of reversible metal electrodeposition devices through the enhancement of Zn nucleation density, enabling the regulation of repeated Zn plating/stripping and the development of flexible, heatable electrochromic smart window with remarkable and ultrafast optical modulation. Download: Download high-res image (44KB) Download: Download full-size image
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ACS Catalysis
·
2026
·
IF 13.6
Xin Han,Shanguang Xu,Fan Zhang,Ruiying Chai,Shanguo Du,Xiuling Jiao,Dairong Chen,Jie Zhang
The modulation of catalyst surfaces with alkali metals is a key research topic in heterogeneous catalysis. This study elucidates the mechanistic role of sodium promotion in enhancing the performance of MgO-supported Pt catalysts for the selective hydrodeoxygenation (HDO) of guaiacol to phenol. The catalytic activity exhibited a distinct volcano-shaped trend as a function of sodium content, with optimal performance achieved using the Pt-5Na/MgO catalyst. Under the conditions of 280 °C and 0.1 MPa H2 pressure, the Pt-5Na/MgO catalyst achieved 98% conversion and 91% phenol selectivity. Mechanistic studies revealed that sodium modification increased the basicity of the support, and a correlation was observed between guaiacol conversion and the density of surface basic sites. Additionally, sodium addition induced electronic restructuring of the catalyst by transferring electrons from Na to Pt, which increased the electron density of Pt nanoparticles, facilitated the reduction of Pt, and generated more catalytically active Pt species. This electronic modification enhanced the hydrogen activation capacity of Pt species, while the stabilization of hydrogen species on basic sites enhanced hydrogen spillover efficiency, thereby increasing the availability of reactive hydrogen species. The findings provide insight into the design of alkali-metal-promoted Pt catalysts for hydrogenation applications.
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Materials Today Nano
·
2022
·
IF 13.364
R. Sun,Z. Xia,Z. Zhang,X. Xu,F. Jing,S. Wang,G. Sun
Water management within the electrode architecture restrains the performance and dynamic stability of polymer electrolyte fuel cells (PEFCs), especially with the reduction of precious electrocatalyst loading. Local mass transport at the catalyst-ionomer interphase crucially depends on the water uptake of the ionomer layers, which could be optimized via balancing electrode flooding and draining during the dynamic change of current and humidification . Herein this work, supportless platinum-ionomer hybrid porous nanofibrous are constructed via a new method combined with electrospinning and electrochemical etching . Ascribing to the hierarchical architecture of continuous platinum-ionomer nano-dendrites and fibrous networks, only 17.8% maximum power density deviation under varied cathode humidity is observed in the porous nanofibrous cathode, compared to 160% deviation for traditional one. Such self-regulated water management within this electrode is achieved due to stable interfacial layer constructed under working circumstance. This presented work could provide alternative thoughts on mass transport issues affected by nanoscale interfacial structures and demonstrate an efficient design of electrode architecture with better performance and dynamic stability for polymer electrolyte fuel cells .
研究领域:
能源材料
·
电化学
·
纳米材料
·
燃料电池
·
可持续能源
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JOURNAL OF CATALYSIS
·
2022
·
IF 8.047
Shenghong Wang,Changan Zhou,Yongda Cao,Lei Song,Lirong Zheng,Kui Ma,Hairong Yue
Electrochemical water–gas shift (EWGS) reaction is an emerging technology with energy-saving and environmental-friendly advantages to produce high-purity hydrogen form the waste gas containing CO. However, it remains a significant challenge to design superior activity and highly durable EWGS electrocatalysts, particularly with low content of noble metals. Herein, a series of Pt-xCu/Fe 2 O 3 (x = 0, 2, 5) catalysts are synthesized by the complexation precipitation method to construct coupling sites between Pt and CuOx, aiming to optimize the adsorption of CO and the activation of OH – . The obtained 2.5Pt-2Cu/Fe 2 O 3 catalyst presents a unique Pt-O-Cu structure, delivering a much lowest onset potential, high specific activity, and excellent mass activity (1.5 A·mg Pt -1 ) at 0.73 V ( vs. RHE), which is over 15 and 3 times that of commercial Pt/C (20%) and unmodified Pt/Fe 2 O 3 catalyst, respectively. Meanwhile, the in-situ X-ray absorption results demonstrate that the facilitated interaction among the Pt-O-Cu structure promotes the high durability of the 2.5Pt-2Cu/Fe 2 O 3 catalyst and the operability at high potential. More importantly, the moderate binding of CO and moderate activation of OH* are suggested for boosting the reactivity in the CO electro-oxidation reaction. In particular, the fabricated Pt||2.5Pt-2Cu/Fe 2 O 3 , employed in coupling the HER and CO electro-oxide reaction, shows a remarkable hydrogen production of about 98 mmol H2 ·h −1 ·mg Pt −1 at 0.8 V ( vs. RHE). This work also definitely confirms the possibility of the catalyst being applied to produce hydrogen under practical conditions with different concentrations of CO, even being applied in the purification of trace CO in a hydrogen-rich atmosphere.
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